39c3; bitsundbaeume_aboutfreedom: 0.21; ccc: 2.0; chaos_jetzt: 0.9; cdc: 0.24; fnf: 0.12; free-knowledge-habitat: 0.13; haecksen-assembly: 1.4; music: 1.5; sharedtables: 1.0; spaetverkauf: 0.6; sgmk: 1.0; 2026-03-02 22:15:04.610688+00:00 39c3 2025-12-27T10:00:00+00:00 2025-12-30T15:00:00+00:00 4 00:10 Europe/Berlin https://events.ccc.de/congress/2025/hub/ https://events.ccc.de/congress/2025/hub/ 2025-12-27T10:30:00+01:00 10:30 00:30 One 39c3-opening-ceremony de CCC & Community Ceremony Power On! Lasst uns gemeinsam an diesem magischen Ort ankommen und alles vorbereiten, um die nächsten vier Tage in einer fröhlich-kreativen, fantastischen Wunderwelt zu verbringen und Kraft zu tanken. Das Opening gibt euch die wichtigsten Infos für den Congress, stimmt euch ein und ... äh ... bis Späti! pajowu Stella https://events.ccc.de/congress/2025/hub/event/detail/opening-ceremony https://cfp.cccv.de/39c3/talk/POWER1/ https://cfp.cccv.de/39c3/talk/POWER1/feedback/ false 2025-12-27T11:00:00+01:00 11:00 00:40 One 39c3-all-sorted-by-machines-of-loving-grace-ai-cybernetics-and-fascism-and-how-to-intervene en Ethics, Society & Politics Talk While the extreme right is on the rise in many countries and climate change is unrolling, a promising future seems to be written: According to Elon Musk, Sam Altman, and some other “tech bros” it is to leave the dying planet to go to space. With the help of something called “A(G)I”. But what kind of future is the one that is promised? And what is the connection between power cycles of tech company owners and people who's believes can be called fascist? As we moved power through data in the hands of very view, it is important to examine what ideas these view have in their heads. This talk will explore the roots of today's tech fascism and its love for tech. From the early thoughts and movements in the US and Europe to Futurism and the Holocaust, organised with Hollerith punching cards. It will dive into the its blooming relationship with cybernetics, and take a look in the future the “tech bros” want to lure us in. This talk will address the often overlooked topic of how and when people get comfy with diving into movements of hate and how to stop a white supremacy future where we will be sorted by machines. And, in taking a look on past movements opposing authoritarianism and will examine mindsets and possibilities of resistance as well as the possibility of restarting everything. Because we have a planet and loved ones to lose. Wear your safety cat-ears, buckle up, it will be a wild, but entertaining ride. The idea of the Super-Human is not a new one, neither is the idea of charismatic „good“ leader nor to sort humans into classes, races, abilities. The idea of a view controlling many by force and ideas that justify their rulership and cruelties is an old one, as is the opposing idea of a free society and humans as equals. A central aspect is how people involved see the human nature and according to that what society they want to build. And what role is intended for technology. In the 19th century the beliefs of both the opposing sides dripped into science, as well as individual’s heads, and social movements around the world. While some wanted to form a wold society of equals others wanted to breed a master race that to control everything. The love of industrial leaders for authoritarianism has played an important role since the beginning in funding and providing access to powerful networks. Industrialists like Henry Ford loved and promoted ideas at least close to fascism. German, Italian, and Austrian counterparts funded Hitler and Mussolini. And it is not that they did it because they did not understand the fascist leader’s yearning – it was because they shared and loved their aims and violence. In Futurism, one of the often overlooked roots of fascism, and its Manifesto the enemies and societal goals are proclaimed crystal clear: “We will glorify war — the only true hygiene of the world — militarism, patriotism, the destructive gesture of anarchist, the beautiful Ideas which kill, and the scorn of woman.“ After WWII most of the people believing in dominating others by force and eugenics lived on, they and their cronies had slaughtered millions and destroyed whole social movements were opposing them. These people warning us about authoritarian prophets of doom and concentration camps are still missing. In the post-war time ideas of authoritarianism met a new player: Cybernetics, the believe in a future, where all problems will be solved through technology and we are “All Watched Over by Machines of Loving Grace” (Richard Brautigam, 1967). The ideas split, merged, and melted into new beliefs and quasi-religions. Into something that is called “Cyber-Libertarianism” by David Golumbia or “TESCREAL” by Émile P. Torres and Timnit Gebru. This talk will address an aspect that is often missing in analyses: What kind of breeding ground is it where ideas of fascism hatches best? And how can we stop iFascism instead of participating in it? Furthermore, as being sorted by machines is not everyone's secret dream, ways to stop iFascism will be provided. Because we are more, we care for people in need – and we are the chaos! Katika Kühnreich https://events.ccc.de/congress/2025/hub/event/detail/all-sorted-by-machines-of-loving-grace-ai-cybernetics-and-fascism-and-how-to-intervene https://cfp.cccv.de/39c3/talk/TWEDR3/ https://cfp.cccv.de/39c3/talk/TWEDR3/feedback/ false 2025-12-27T11:55:00+01:00 11:55 00:40 One 39c3-zps-ein-jahr-adenauer-srp-und-mehr en Art & Beauty Talk Es ist genau ein Jahr her, dass der Adenauer SRP+ in der Halle des 38C3 stand. Damals war er noch eine Baustelle, aber schon bald machte er sich auf den Weg, um Geschichte zu schreiben. Wir nehmen euch mit auf eine Reise: von Blockade über Protest, von Sommerinterviews bis zu Polizeischikanen lassen wir ein Jahr Adenauer SRP+ Revue passieren. Das könnte lustig werden. Außerdem: alles zum Walter Lübcke-Memorial-Park, den wir gerade direkt vor die CDU-Zentrale gebaut haben. Owei owei: Das wird viel für 40 Minuten. Es ist genau ein Jahr her, dass der Adenauer SRP+ in der Halle des 38C3 stand. Damals war er noch eine Baustelle, aber schon bald machte er sich auf den Weg, um Geschichte zu schreiben. Wir nehmen euch mit auf eine Reise: von Blockade über Protest, von Sommerinterviews bis zu Polizeischikanen lassen wir ein Jahr Adenauer SRP+ Revue passieren. Das könnte lustig werden. Außerdem: alles zum Walter Lübcke-Memorial-Park, den wir gerade direkt vor die CDU-Zentrale gebaut haben. Owei owei: Das wird viel für 40 Minuten. https://cfp.cccv.de/media/39c3/submissions/DLDUDB/flyerservice_Hahn_Feuerwehr_B8CjkR9_2dA_EDO16Ys.webp Stefan Pelzer Philipp Ruch https://events.ccc.de/congress/2025/hub/event/detail/zps-ein-jahr-adenauer-srp-und-mehr https://cfp.cccv.de/39c3/talk/DLDUDB/ https://cfp.cccv.de/39c3/talk/DLDUDB/feedback/ false 2025-12-27T12:50:00+01:00 12:50 00:40 One 39c3-building-hardware-easier-than-ever-harder-than-it-should-be en Hardware Talk Building electronics has never been easier, cheaper, or more accessible than the last few years. It's also becoming a precious skill in a world where commercially made electronics are the latest victim of enshittification and vibe coding. And yet, while removing technical and financial barriers to building things, we've not come as far as we should have in removing social barriers. The electronics and engineering industry and the cultures around them are hostile to newcomers and self-taught practitioners, for no good reason at all. I've been teaching advanced electronics manufacturing skills to absolute beginners for a decade now, and they've consistently succeeded at acquiring them. I'm here to tell you why it's not as hard as it seems, how to get into it, and why more people who think they can't should try. Electronics is easier and more fun to get into than it's ever been before. All the tools and resources are easily accessible and super cheap or free. There's an enormous amount of things to build from and build on. It's also never been more important to be able to build and understand electronics, as assholes running corporations are wasting their workers' unpaid overtime on making all the electronics in our lives shittier, more full of ads, slop, and spyware, and more frustrating to use. Encountering a device that works for you instead of against you is a breath of fresh air. Building one is an act of resistance and power. Not depending on the whims of corporate assholes is freedom. However, the culture around electronics and the electronics industry is one of exclusion and gatekeeping. It doesn't need to be. It would be stupidly easy to make things better, and we should. I've been teaching absolute beginners advanced electronics manufacturing skills for many years now. It's absolutely shocking how much more diverse the people who I teach are compared to the industry. The "hardware is hard" meme is true in some cases but toxic when worn as a badge of pride or a warning to people attempting it. I will tell you why designing and building electronics is not nearly as hard as it seems, how it's almost never been easier to get into it, and why it's very important that people who think or have been told they can't do it should be doing more of it. I'll tell you my experiences of what building devices is like, show and tell a few useful skills, and tell the story of how trying to prove someone wrong on the internet turned into a decade of teaching people with zero experience how to handle the most complex electronic components at all sorts of community events. Kliment https://events.ccc.de/congress/2025/hub/event/detail/building-hardware-easier-than-ever-harder-than-it-should-be https://cfp.cccv.de/39c3/talk/77GPKJ/ Slides Transcript https://cfp.cccv.de/39c3/talk/77GPKJ/feedback/ false 2025-12-27T13:50:00+01:00 13:50 00:40 One 39c3-liberating-bluetooth-on-the-esp32 en Hardware Talk Despite how widely used the ESP32 is, its Bluetooth stack remains closed source. Let’s dive into the low-level workings of a proprietary Bluetooth peripheral. Whether you are interested in reverse engineering, Bluetooth security, or just enjoy poking at undocumented hardware, this talk may inspire you to dig deeper. The ESP32 has become an ubiquitous platform in the hacker and maker communities, powering everything from badges and sensors to mesh networks and custom routers. While its Wi-Fi stack has been the subject of previous reverse engineering efforts, its Bluetooth subsystem remains largely undocumented and closed source despite being present in millions of devices. This talk presents a reverse engineering effort to document Espressif’s proprietary Bluetooth stack, with a focus on enabling low-level access for researchers, security analysts, and developers to improve existing affordable and open Bluetooth tooling. The presentation covers the reverse engineering process itself, techniques and the publication of tooling to simplify the process of peripheral mapping, navigating broken memory references and symbol name recovery. The core of the talk focuses on the internal workings of the Bluetooth peripheral. The reverse engineering effort led to the discovery of the peripheral architecture, it’s memory regions, interrupts and a little bit of information about other related peripherals. By publishing open tooling, SVD files and other documentation, this work aims to empower researchers, hackers, and developers to build custom Bluetooth stacks, audit existing ones, and repurpose the ESP32 for novel applications. This may interest you if you care about transparency, low-level access, and collaborative tooling. Antonio Vázquez Blanco (Antón) https://events.ccc.de/congress/2025/hub/event/detail/liberating-bluetooth-on-the-esp32 https://cfp.cccv.de/39c3/talk/ZADHHE/ Slides https://cfp.cccv.de/39c3/talk/ZADHHE/feedback/ false 2025-12-27T14:45:00+01:00 14:45 01:00 One 39c3-opening-pamdora-s-box-and-unleashing-a-thousand-paths-on-the-journey-to-play-beatsaber-custom-songs en Security Talk While trying to apply fault injection to the AMD Platform Security Processor with unusual (self-imposed) requirements/restrictions, it were software bugs which stopped initial glitching attempts. Once discovered, the software bug was used as an entry to explore the target, which in turn lead to uncovering (and exploiting) more and more bugs, ending up in EL3 of the most secure core on the chip. This talk is about the story of trying to glitch the AMD Platform Security Processor, then accidentally discovering several bugs and getting a good look inside the target, before returning to trying to hammer it with novel physical strategies. # BACKSTORY --------------- So here is the backstory of how it all started: - I bought a commercial gaming console - Then bought a VR headset (for this console) because of exclusive game - But also wanted to play beatsaber - I could, but builtin song selection was very limited - Custom songs exist (for example on steam), but not for this console - I didn't want to buy a second headset for steam That's when i decided i want to hack this console so that i can port community created customs songs to the console and play them there with the VR headset i already have. Initially starting with an approach similar to the usual "entrypoint through browser", then go for kernel and call it a day, but quickly annoying hurdles blocked my way. For one, the Hypervisor makes your live just miserable with it's execute only kernel text blind exploitation. Other issues were that one needs to be on latest version to download the game, which exists only as digital purchase title, preventing me to share my efforts with others even if i can get it working on my console. Though, what finally put the nail in the coffin was when porting a kernel zeroday to the console failed because of heavy sandboxing, unreachable syscalls or even entirely stripped kernel functions. Some may call it "skill issue". Anyways, that's when i was full of it and decided to bring this thing down for good. Everybody does glitching nowadays and according to rumors people did have success on this thing with glitching before, so how hard can it really be, right? So the question became: Is it possible to build a modchip, which glitches the board and lets me play beatsaber custom songs? Stuff like that has been done on other consoles before (minus the beatsaber part :P) Turns out that when manufacturing produces chips with broken GPUs, they are sold as spinoff desktop mainboards (with disabled GPU) rather than thrown away. Which is great, because those mainboards are much cheaper, especially if you buy broken spinoff mainboards on ebay. So on the journey to beatsaber custom songs, breaking this desktop mainboard became a huge chunk of the road. Because if i can glitch this and build a modchip for it, surely i can also do it for the console, right? I mean it's the exact same SoC afterall! Back when i started i didn't know i would be about to open pAMDoras box and discover so many bugs and hacks. # Actual talk description --------------- **Disclaimer: This is not a console hacking talk!** This talk is gonna be about breaking nearly every aspect of the AMD Platform Security Processor of the desktop mainboard with the same SoC as the console. While certainly usefuly for _several_ other AMD targets, unfortunately not every finding can directly be ported to the console. Still, it remains very useful nonetheless! Note: The final goal of custom songs on beatsaber has not been reached yet, this talk is presenting the current state of things. In this talk you'll be taken on a ride on how everything started and how almost every aspect of the chip was broken. How bugs were discovered, what strategies were used to move along. Not only will several novel techniques be presented for applying existing physical attacks to targets where those couldn't really be applied before, but also completely new approaches are shared which bring a whole different perspective on glitching despite having lots of capacitors (which we don't really want to remove) and extremely powerfull mosfets (which smooth out crowbar attempts in a blink of an eye). But that's not all! While trying to perform physical attacks on the hardware, the software would just start falling apart by itself. Which means, at least **6 unpatchable\* bugs** were discovered, which are gonna be presented in the talk alongside with **5 zero-day exploits**. Getting EL3 code execution on the most secure core inside AMDs SoC? No Problem! Apart from just bugs and exploits, many useful techniques and discovery strategies are shared which will provide an excellent knowedgle base and attack inspiration for following along or going for other targets. tihmstar https://events.ccc.de/congress/2025/hub/event/detail/opening-pamdora-s-box-and-unleashing-a-thousand-paths-on-the-journey-to-play-beatsaber-custom-songs https://cfp.cccv.de/39c3/talk/AYYYH9/ slides https://cfp.cccv.de/39c3/talk/AYYYH9/feedback/ false 2025-12-27T16:00:00+01:00 16:00 01:00 One 39c3-all-my-deutschlandtickets-gone-fraud-at-an-industrial-scale en Security Talk The Deutschlandticket was the flagship transport policy of the last government, rolled out in an impressive timescale for a political project; but this speed came with a cost - a system ripe for fraud at an industrial scale. German public transport is famously decentralised, with thousands of individual companies involved in ticketing and operations. Unifying all of these under one national, secure, system has proven a challenge too far for politicians. The end result: losses in the hundreds of millions of Euros, compensated to the transport companies from state and federal budgets to keep the system afloat, and nobody willing to take responsibility. This talk will cover the political, policy, and technical mistakes that lead to this mess; how we can learn from these mistakes; and what we can do to ensure the Deutschlandticket has a viable future. At last years Congress Q presented [a deep-dive into the technical details of train ticketing](https://media.ccc.de/v/38c3-what-s-inside-my-train-ticket) and its [Zügli](https://zügli.app) platform for this; since then, things have gone rather out of hand. The little side-project for looking into the details of train tickets turned into a full-time project for detecting ticketing fraud. This talk details an executive summary of the madness that has been the past year, and how we accidentally ended up in national and international politics working to secure the Deutschlandticket. Shortly after last year's talk, we were contacted about some *interesting* looking tickets someone noticed, issued by the Vetter GmbH Omnibus- und Mietwagenbetrieb - or so they claimed to be. These were normal Deutschlandtickets, but with a few weird mistakes in them. At first, we thought nothing much of it; mistakes happen. But, on further investigation, these turned out to not be legitimate tickets at all, but rather from a fraudulent website by the name of d-ticket.su, using the private signing key obtained under suspicious circumstances. How exactly this key came into the wrong hands remains unclear, but we present the possible explanations for how this could've happened, how many responsible have been thoroughly uncooperative in getting to the bottom of this, and how the supporting systems and processes of the Deutschlandticket were unable to cope with this situation. Parallel to this, another fraud has been draining the transport companies of their much-needed cash: SEPA Direct Debit fraud. Often, a direct debit payment can be setup online with little more than an IBAN and ticking a box; and most providers of the Deutschlandticket offer an option to pay via direct debit. Fraudsters have noticed this, and mass purchase Deutschlandtickets with invalid or stolen IBANs before flipping them for a discounted price on Telegram; made easier because most transport companies issue a ticket immediately, before the direct debit has been fully processed. The supporting systems of the Deutschlandticket in many cases don't even provide for the revocation of such tickets. We will detail the hallmarks of this fraud, how transport companies can work to prevent it, and how we tracked down the fraudsters by their own careless mistakes. Q Misell 551724 / maya boeckh https://events.ccc.de/congress/2025/hub/event/detail/all-my-deutschlandtickets-gone-fraud-at-an-industrial-scale Slides Zügli https://cfp.cccv.de/39c3/talk/JZ9A3E/ https://cfp.cccv.de/39c3/talk/JZ9A3E/feedback/ false 2025-12-27T17:15:00+01:00 17:15 01:00 One 39c3-to-sign-or-not-to-sign-practical-vulnerabilities-i en Security Talk Might contain zerodays. https://gpg.fail/ From secure communications to software updates: PGP implementations such as *GnuPG* ubiquitously relied on to provide cryptographic assurances. Many applications from secure communications to software updates fundamentally rely on these utilities. Since these have been developed for decades, one might expect mature codebases, a multitude of code audit reports, and extensive continuous testing. When looking into various PGP-related codebases for some personal use cases, we found these expectations not met, and discovered multiple vulnerabilities in cryptographic utilities, namely in *GnuPG*, *Sequoia PGP*, *age*, and *minisign*. The vulnerabilities have implementation bugs at their core, for example in parsing code, rather than bugs in the mathematics of the cryptography itself. A vulnerability in a parser could for example lead to a confusion about what data was actually signed, allowing attackers without the private key of the signer to swap the plain text. As we initially did not start with the intent of conducting security research, but rather were looking into understanding some internals of key management and signatures for personal use, we also discuss the process of uncovering these bugs. Furthermore, we touch on the role of the OpenPGP specification, and the disclosure process. Beyond the underlying mathematics of cryptographic algorithms, there is a whole other layer of implementation code, assigning meaning to the processed data. For example, a signature verification operation both needs robust cryptography **and** assurance that the verified data is indeed the same as was passed into the signing operation. To facilitate the second part, software such as *GnuPG* implement parsing and processing code of a standardized format. Especially when implementing a feature rich and evolving standard, there is the risk of ambivalent specification, and classical implementation bugs. The impact of the vulnerabilities we found reaches from various signature verification bypasses, breaking encryption in transit and encryption at rest, undermining key signatures, to exploitable memory corruption vulnerabilities. 49016 Liam https://events.ccc.de/congress/2025/hub/event/detail/to-sign-or-not-to-sign-practical-vulnerabilities-i Slides https://cfp.cccv.de/39c3/talk/EYDWBE/ https://cfp.cccv.de/39c3/talk/EYDWBE/feedback/ false 2025-12-27T19:15:00+01:00 19:15 01:00 One 39c3-die-kanguru-rebellion-digital-independence-day de CCC & Community Talk Marc-Uwe Kling liest neues vom Känguru vor. Vielleicht auch was von Elon und Jeff on Mars. Und dann ruft das Känguru zum Digital Independence Day auf. https://cfp.cccv.de/media/39c3/submissions/QRHPLE/Screenshot_2025-10-27_at_20.22.45_aSuqv5f.png Marc-Uwe Kling Linus Neumann https://events.ccc.de/congress/2025/hub/event/detail/die-kanguru-rebellion-digital-independence-day https://cfp.cccv.de/39c3/talk/QRHPLE/ https://cfp.cccv.de/39c3/talk/QRHPLE/feedback/ false 2025-12-27T20:30:00+01:00 20:30 01:00 One 39c3-episode-ii-der-rat-schlagt-zuruck de Ethics, Society & Politics Talk Seit jetzt schon vier Jahren droht aus der EU die Chatkontrolle. In Deutschland ist das Thema nach den Protesten im Oktober aktueller denn je - und sogar Jens Spahn und Rainer Wendt sind plötzlich gegen diese Form der Überwachung. In diesem Vortrag schauen wir zurück und erklären was, vor allem im Hintergrund, passiert ist. Wir nehmen die Position der Bundesregierung genau unter die Lupe und werfen einen Blick auf die Schritte, die auf EU-Ebene vor uns liegen. Die Chatkontrolle liest sich mehr wie eine tragische Komödie, als ein Gesetzgebungsverfahren. Nach dem dramaturgischen Rückblick auf dem 37C3 wird es nun Zeit einen Blick auf die Seite der Rebellen zu werfen. Markus Reuter und khaleesi haben den Gesetzgebungsprozess rund um die Chatkontrolle von Anfang an eng begleitet, er aus der der journalistischen, sie aus der Policy-Perspektive. Nach den ersten Jahren mit großen Rummel und Hollywoodstars ist es nach den EU-Wahlen doch etwas ruhig geworden. Doch die Gefahr ist nicht vom Tisch: Zwar steht die Position des EU-Parlaments gegen die Chatkontrolle - aber wie sicher sie wirklich ist, ist unklar. Derzeit hängt alles am Rat: Es gab sehr positive Vorschläge (polnische Ratspräsidentschaft) und negative Vorschläge (dänische Ratspräsidentschaft) - doch einigen können sich die Länder nicht und eine Mehrheit will die Chatkontrolle, kann sich aber nicht durchsetzen. Und auch in Deutschland hat die Chatkontrolle den ganz großen Sprung in die Öffentlichkeit geschafft und die Gegner:innen einen Etappensieg errungen. Was dieser Erfolg mit der Arbeit der letzten vier Jahre zu tun hat und warum auch in Deutschland noch nichts in trockenen Tüchern ist, erzählen wir in diesem Talk. khaleesi Markus Reuter https://events.ccc.de/congress/2025/hub/event/detail/episode-ii-der-rat-schlagt-zuruck https://cfp.cccv.de/39c3/talk/Y9EJFV/ https://cfp.cccv.de/39c3/talk/Y9EJFV/feedback/ false 2025-12-27T21:45:00+01:00 21:45 01:00 One 39c3-hacking-washing-machines en Hardware Talk Almost everyone has a household appliance at home, whether it's a washing machine, dishwasher, or dryer. Despite their ubiquity, little is publicly documented about how these devices actually work or how their internal components communicate. This talk takes a closer look at proprietary bus systems, hidden diagnostic interfaces, and approaches to cloud-less integration of appliances from two well-known manufacturers into modern home automation systems. Modern home appliances may seem simple from the outside, but inside they contain complex electronic systems, proprietary communication protocols, and diagnostic interfaces rarely documented outside the manufacturer. In this talk, we'll explore the challenges of reverse-engineering these systems: from analyzing appliance control boards and internal communication buses to decompiling and modifying firmware to better understand device functionality. We'll also look at the security mechanisms designed to protect diagnostic access and firmware readout, and how these protections can be bypassed to enable deeper insight into device operation. Finally, this talk will demonstrate how the results of this research can be used to integrate even legacy home appliances into popular home automation platforms. This session combines examples and insights from the reverse-engineering of B/S/H/ and Miele household appliances. https://cfp.cccv.de/media/39c3/submissions/H37JAG/39c3-washing-machine_6ch9wmg_3fF87MD.webp Severin von Wnuck-Lipinski Hajo Noerenberg https://events.ccc.de/congress/2025/hub/event/detail/hacking-washing-machines https://cfp.cccv.de/39c3/talk/H37JAG/ https://cfp.cccv.de/39c3/talk/H37JAG/feedback/ false 2025-12-27T23:00:00+01:00 23:00 01:00 One 39c3-bluetooth-headphone-jacking-a-key-to-your-phone en Security Talk Bluetooth headphones and earbuds are everywhere, and we were wondering what attackers could abuse them for. Sure, they can probably do things like finding out what the person is currently listening to. But what else? During our research we discovered three vulnerabilities (CVE-2025-20700, CVE-2025-20701, CVE-2025-20702) in popular Bluetooth audio chips developed by Airoha. These chips are used by many popular device manufacturers in numerous Bluetooth headphones and earbuds. The identified vulnerabilities may allow a complete device compromise. We demonstrate the immediate impact using a pair of current-generation headphones. We also demonstrate how a compromised Bluetooth peripheral can be abused to attack paired devices, like smartphones, due to their trust relationship with the peripheral. This presentation will give an overview over the vulnerabilities and a demonstration and discussion of their impact. We also generalize these findings and discuss the impact of compromised Bluetooth peripherals in general. At the end, we briefly discuss the difficulties in the disclosure and patching process. Along with the talk, we will release tooling for users to check whether their devices are affected and for other researchers to continue looking into Airoha-based devices. Examples of affected vendors and devices are Sony (e.g., WH1000-XM5, WH1000-XM6, WF-1000XM5), Marshall (e.g. Major V, Minor IV), Beyerdynamic (e.g. AMIRON 300), or Jabra (e.g. Elite 8 Active). Airoha is a vendor that, amongst other things, builds Bluetooth SoCs and offers reference designs and implementations incorporating these chips. They have become a large supplier in the Bluetooth audio space, especially in the area of True Wireless Stereo (TWS) earbuds. Several reputable headphone and earbud vendors have built products based on Airoha’s SoCs and reference implementations using Airoha’s Software Development Kit (SDK). During our Bluetooth Auracast research we stumbled upon a pair of these headphones. During the process of obtaining the firmware for further research we initially discovered the powerful custom Bluetooth protocol called *RACE*. The protocol provides functionality to take full control of headphones. Data can be written to and read from the device's flash and RAM. The goal of this presentation is twofold. Firstly, we want to inform about the vulnerabilities. It is important that headphone users are aware of the issues. In our opinion, some of the device manufacturers have done a bad job of informing their users about the potential threats and the available security updates. We also want to provide the technical details to understand the issues and enable other researchers to continue working with the platform. With the protocol it is possible to read and write firmware. This opens up the possibility to patch and potentially customize the firmware. Secondly, we want to discuss the general implications of compromising Bluetooth peripherals. As smart phones are becoming increasingly secure, the focus for attackers might shift to other devices in the environment of the smart phone. For example, when the Bluetooth Link Key, that authenticates a Bluetooth connection between the smart phone and the peripheral is stolen, an attacker might be able to impersonate the peripheral and gain its capabilities. Dennis Heinze Frieder Steinmetz https://events.ccc.de/congress/2025/hub/event/detail/bluetooth-headphone-jacking-a-key-to-your-phone https://cfp.cccv.de/39c3/talk/LYE33R/ Slides https://cfp.cccv.de/39c3/talk/LYE33R/feedback/ false 2025-12-28T00:20:00+01:00 00:20 01:00 One 39c3-unnecessarily-complicated-kitchen-die-wissenschaft-des-guten-geschmacks de Entertainment Talk In unserer „Unnecessarily Complicated Kitchen“ hacken wir die Gesetze der Kulinarik. Ich zeige live, wie Hitze, Chemie und Chaos zusammenwirken, wenn Moleküle tanzen, Dispersionen emulgieren und Geschmack zu Wissenschaft wird. Zwischen Pfanne und Physik entdecken wir, warum Kochen im Grunde angewandtes Debugging ist – und wie man Naturgesetze so würzt, dass sie schmecken. Willkommen in der „Unnecessarily Complicated Kitchen“ – einer Küche, in der Naturwissenschaft, Technik und kulinarisches Chaos aufeinandertreffen. Wir sezieren das Kochen aus der Perspektive von Hacker*innen: Warum Hitzeübertragung ein deinen Tschunk kühlt, warum Emulsionen wie BGP funktionieren und wie sich die Kunst des Abschmeckens in Datenpunkten erklären lässt. In diesem Talk verbinden wir naturwissenschaftliche Experimente mit kulinarischer Praxis. Wir erhitzen, rühren, messen und analysieren – live auf der Bühne. Dabei übersetzen wir Physik und Chemie in Geschmack, Textur und Aha-Momente. Kochen wird so zum Laborversuch, zum Hack, zum Reverse Engineering des guten Geschmacks. Ich zeige, dass hinter jeder gelungenen Marinade ein Protokoll steckt, hinter jeder Soße ein Algorithmus – und dass man auch in der Küche mit Trial & Error, Open Source und einer Prise Chaos zu erstaunlichen Ergebnissen kommt. Am Ende steht nicht nur Erkenntnis, sondern auch Genuss: Denn wer versteht, warum etwas schmeckt, kann die Regeln brechen – und sie dabei besser würzen. https://cfp.cccv.de/media/39c3/submissions/PSG7QA/14875859_1132872053446506_383638730_o-B_O9KhuK3.webp LukasQ https://events.ccc.de/congress/2025/hub/event/detail/unnecessarily-complicated-kitchen-die-wissenschaft-des-guten-geschmacks https://cfp.cccv.de/39c3/talk/PSG7QA/ https://cfp.cccv.de/39c3/talk/PSG7QA/feedback/ false 2025-12-27T11:00:00+01:00 11:00 00:40 Ground 39c3-the-art-of-text-rendering en Art & Beauty Talk Typography is the art of arranging type to make written language legible, readable, and appealing when displayed. However, for the neophyte, typography is mostly apprehended as the juxtaposition of characters displayed on the screen while for the expert, typography means typeface, scripts, unicode, glyphs, ascender, descender, tracking, hinting, kerning, shaping, weigth, slant, etc. Typography is actually much more than the mere rendering of glyphs and involves many different concepts. If glyph rendering is an important part of the rendering pipeline, it is nonetheless important to have a basic understanding of typography or there’s a known risk at rendering garbage on screen, as it has been seen many times in games, software and operating systems. Text is everywhere in our modern digital life and yet, no one really pay attention to how it is rendered on a screen. Maybe this is a sign that problem has been solved. But it isn't. A few people are still looking at the best way to display text on any devices & any languages. This talk is based on a lesson I gave at SIGGRAPH a few years ago (https://www.slideshare.net/slideshow/siggraph-2018-digital-typography/110385070) to explain rendering techniques and concepts. https://cfp.cccv.de/media/39c3/submissions/X8ZZBV/Screenshot_2025-10-24_at_06.46.40_Q2EZe_loAs9SN.webp Nicolas Rougier https://events.ccc.de/congress/2025/hub/event/detail/the-art-of-text-rendering Presentation slides https://cfp.cccv.de/39c3/talk/X8ZZBV/ https://cfp.cccv.de/39c3/talk/X8ZZBV/feedback/ false 2025-12-27T11:55:00+01:00 11:55 00:40 Ground 39c3-demystifying-fuzzer-behaviour en Science Talk Despite how it's often portrayed in blogs, scientific articles, or corporate test planning, fuzz testing isn't a magic bug printer; just saying "we fuzz our code" says nothing about how _effectively_ it was tested. Yet, how fuzzers and programs interact is deeply mythologised and poorly misunderstood, even by seasoned professionals. This talk analyses a number of recent works and case studies that reveal the relationship between fuzzers, their inputs, and programs to explain _how_ fuzzers work. Fuzz testing (or, "fuzzing") is a testing technique that passes randomly-generated inputs to a subject under test (SUT). This term was first coined in 1988 by Miller to describe sending random byte sequences to Unix utilities (1), but was arguably preceded in 1971 by Breuer for fault detection in sequential circuits (2) and in 1972 by Purdom for parser testing by generating sentences from grammars (3). Curiously, they all exhibit different approaches for generating inputs based on knowledge about the SUT, though none of them use feedback from the SUT to make decisions about new inputs. Fuzzing wasn't yet popular, but industry was catching on. Between the late 90s and 2013, we see a number of strategies appear in industry (4). Some had success with constraint solvers, where they would observe runtime behavior or have knowledge about a target's structure to produce higher quality inputs. Others operated in a different way, by taking an existing input and tweaking it slightly ("mutating") to address the low-likelihood of random generation to produce structured inputs. None was as successful, or as popular, as American Fuzzy Lop, or "AFL", released in 2013. This combined coverage observations for inputs (Ormandy, 2007) with concepts from evolutionary novelty search (5) into a tool which could, from very few initial inputs, _evolve_ over multiple mutations to find new, untested code. Despite its power, this advancement made it far more difficult to understand how fuzzers even worked. Now all you had to do was point this tool at a program and it would start testing, and the coverage would go up; users were now only responsible for writing "harnesses", code which processed fuzzer-produced inputs and sent them to the SUT. Though there have been a few real advances to fuzzing since (or, at least, strategies which combined previous methods more effectively), fuzzing research has mostly deadended, with new methods squeezing only minor improvements out of older ones. This, and inadequate harness writing, comes from this opaqueness in how fuzzers internally operate: without understanding what these tools do from first principles, there's no clear "right" and "wrong" way to do things because there is no mental model to test them against. This talk doesn't talk about new bugs, new fuzzers, or new harness generation tools. The purpose of this talk is to uncover mechanisms of fuzzer input production in the context of different classes of SUT and harnesses thereon, highlighting recent papers which have clarified our understanding of how fuzzers and SUTs interact. By the end, you will have a better understanding of _why_ modern fuzzers work, _what_ their limitations are, and _how_ you can write better fuzzers and harnesses yourself. (1): https://pages.cs.wisc.edu/~bart/fuzz/CS736-Projects-f1988.pdf (2): https://ieeexplore.ieee.org/document/1671733 (3): https://link.springer.com/article/10.1007/BF01932308 (4): https://afl-1.readthedocs.io/en/latest/about_afl.html (5): https://www.academia.edu/download/25396037/0262287196chap43.pdf Addison https://events.ccc.de/congress/2025/hub/event/detail/demystifying-fuzzer-behaviour Source Code (wasm) Source Code (web) Slides Sokoban Fuzzer https://cfp.cccv.de/39c3/talk/YCMWLV/ https://cfp.cccv.de/39c3/talk/YCMWLV/feedback/ false 2025-12-27T12:50:00+01:00 12:50 00:40 Ground 39c3-neuroexploitation-by-design-wie-algorithmen-in-glucksspielprodukten-sich-wirkweisen-des-reinforcement-learning-und-dopaminergen-belohnungssystems-zunu de Science Talk Die Legalisierung des Online-Glücksspiels in Deutschland im Jahr 2021 und die zunehmende Normalisierung von Glücksspiel und Sportwetten in den Medien haben ein Umfeld geschaffen, in welchem Glücksspielprodukte leichter zugänglich und gesellschaftlich stärker akzeptiert sind als je zuvor. Diese weit verbreitete Exposition birgt erhebliche Risiken für vulnerable Personen, insbesondere da die Grenzen zwischen Spielen und Glücksspiel zunehmend verwischen. Seit einiger Zeit ist beispielsweise ein deutlicher Anstieg von Spielen zu beobachten, die Glücksspiel-ähnliche Items wie Loot-Boxen beinhalten. Komplexe Designmerkmale in elektronischen Glücksspielprodukten, z.B. Glücksspielautomaten und Online-Slots, sind gezielt darauf ausgerichtet, Individuen zu verlängerten Spielsitzungen zu motivieren, um den Umsatz zu maximieren. Während Glücksspiel für viele Menschen eine Form der Unterhaltung darstellt, kann das Spielverhalten bei manchen eskalieren und schwerwiegende Folgen für das Leben der Betroffenen haben. Dieser Vortrag wird Mechanismen in Glücksspielprodukten und Loot Boxen beleuchten und aufzeigen, weshalb diese Merkmale das Suchtpotenzial fördern können. Hierbei spielen Mechanismen des sogenannten Verstärkungslernens (engl. Reinforcement Learning) eine Rolle, die das menschliche Belohnungssystem aktivieren, also dopaminerge Bahnen, welche an der Vorhersage von Belohnungen beteiligt sind. Besonderes Augenmerk liegt auf dem Reinforcement-Learning, einem Framework zur Modellierung von Lernen durch belohnungsbasiertes Feedback, welches sowohl in der Psychologie zur Beschreibung menschlichen Lernens und Entscheidungsverhaltens als auch zur Optimierung von Machine-Learning-Algorithmen eingesetzt wird. Im Vortrag werden auch Ergebnisse aus eigener Forschung am Labor der Universität zu Köln vorgestellt. Ziel ist es, Mechanismen des Glücksspiels zu erklären, sowie das Bewusstsein für potenzielle Schäden für Individuen und die Gesellschaft zu schärfen und die Notwendigkeit von Regulation sowie verantwortungsbewussten Designpraktiken zu diskutieren. In diesem Vortrag wird beleuchtet, wie moderne Glücksspielprodukte und glücksspielähnliche Spielmechaniken, etwa Lootboxen, gezielt psychologische und neurobiologische Lernprozesse ausnutzen, um Umsatz durch längeres Spielen und stärkere Interaktion zu generieren. Im Fokus stehen dabei Mechanismen des Verstärkungslernens (Reinforcement Learning) und deren Zusammenspiel mit dem dopaminergen Belohnungssystem. Anhand aktueller Forschungsergebnisse werden Designstrategien vorgestellt, die das Suchtpotenzial von Glücksspielen erhöhen können. Ziel des Vortrags ist es, ein wissenschaftlich fundiertes Verständnis dieser Dynamiken zu vermitteln, Risiken für Individuen und Gesellschaft aufzuzeigen und die Notwendigkeit von Regulierung und verantwortungsvollem Design zu diskutieren. Elke Smith https://events.ccc.de/congress/2025/hub/event/detail/neuroexploitation-by-design-wie-algorithmen-in-glucksspielprodukten-sich-wirkweisen-des-reinforcement-learning-und-dopaminergen-belohnungssystems-zunu https://cfp.cccv.de/39c3/talk/TK8TUQ/ https://cfp.cccv.de/39c3/talk/TK8TUQ/feedback/ false 2025-12-27T13:50:00+01:00 13:50 00:40 Ground 39c3-chaos-macht-kuche de CCC & Community Talk Ihr macht eine Veranstaltung für viele Menschen? Dann haben viele Menschen auch viel Hunger. Jetzt wird euch gezeigt wie man für viele (mehr als 75) Menschen Essen zubereitet. Es braucht nur etwas Vorbereitung und Motivation! Bei vielen Zeltlagern, Sommerfesten, ICMP, Village beim Chaos-Camp und ähnlichem habe ich gelernt wie man für viele Menschen kochen kann und wie nicht. Damit Du nicht die gleiche Lernkurve machen musst, möchte ich Dir zeigen mit welchen Überlegungen Du mit 2-3 Freunden Essen für viele Menschen zubereiten kannst. Planen, einkaufen, Logistik, vorbereiten, kochen, Hygiene, servieren und aufräumen, das kann jeder. Das so zu machen das es Spaß macht, sich nicht nach Arbeit anfühlt und dann auch noch allen schmeckt, das möchte ich Dir mit diesem Vortrag vermitteln. Wenn dein Space in Zukunft ein großes Event plant und Du darüber nachdenkst ob man vor Ort kochen kann und will, dann komme vorbei und lass Dir zeigen was man dafür braucht und wie das geht. Ingwer Andersen https://events.ccc.de/congress/2025/hub/event/detail/chaos-macht-kuche https://cfp.cccv.de/39c3/talk/KL73KP/ https://cfp.cccv.de/39c3/talk/KL73KP/feedback/ false 2025-12-27T14:45:00+01:00 14:45 01:00 Ground 39c3-not-an-impasse-child-safety-privacy-and-healing-together en Ethics, Society & Politics Talk From the EU’s “Chat Control” to the UK’s age verification, there is a growing legislative momentum across jurisdictions to regulate the Internet in the name of protecting children. The monstrosity of child sexual abuse looms large in shaping how policymakers, advocates, and the public understand the problem area of and propose solutions for detecting, reporting, and removing harmful/illegal content. Children’s safety and adults’ privacy are thus pitted against each other, deadlocked into an impasse. As technologists deeply concerned with safety and privacy, where do we go from here? There is a path forward! Many, in fact. But the impasse framing seriously limits how policymakers, technologists, advocates, and our communities understand child sexual abuse (CSA). We need informed, principled, and bold alternatives to policing-driven tech solutions like client-side scanning and grooming classifiers. To effectively and humanely break the cycles of abuse that enables CSA in our communities, we have to think beyond criminalization. This talk will unpack how and why this impasse framing exists, how it constrains us from candidly engaging with the complexity of CSA. Drawing from scientific and clinical research and informed by transformative justice approaches, I detail what CSA is, how and why it happens offline and online, and why the status quo of detection and criminalization does not work. Ultimately, I argue that effective, humane, and collective interventions require protecting the safety and privacy of all those harmed by CSA, and that this creates a unique role for technologists to play. https://cfp.cccv.de/media/39c3/submissions/UUUYHJ/Screenshot_2025-10-21_at_15.43.24_dpunR_UUydmKg.webp Kate Sim https://events.ccc.de/congress/2025/hub/event/detail/not-an-impasse-child-safety-privacy-and-healing-together https://cfp.cccv.de/39c3/talk/UUUYHJ/ Slides https://cfp.cccv.de/39c3/talk/UUUYHJ/feedback/ false 2025-12-27T16:00:00+01:00 16:00 01:00 Ground 39c3-of-boot-vectors-and-double-glitches-bypassing-rp2350-s-secure-boot en Security Talk In August 2024, Raspberry Pi released their newest MCU: The RP2350. Alongside the chip, they also released the RP2350 Hacking Challenge: A public call to break the secure boot implementation of the RP2350. This challenge concluded in January 2025 and led to five exciting attacks discovered by different individuals. In this talk, we will provide a technical deep dive in the RP2350 security architecture and highlight the different attacks. Afterwards, we talk about two of the breaks in detail---each of them found by one of the speakers. In particular, we first discuss how fault injection can force an unverified vector boot, completely bypassing secure boot. Then, we showcase how double glitches enable direct readout of sensitive secrets stored in the one-time programmable memory of the RP2350. Last, we discuss the mitigation of the attacks implemented in the new revision of the chip and the lessons we learned while solving the RP2350 security challenge. Regardless of chip designer, manufacturer, hobbyist, tinkerer, or hacker: this talk will provide valuable insights for everyone and showcase why security through transparency is awesome. The RP2350 is one of the first generally available microcontrollers with active security-features against fault-injection such as glitch-detectors, the redundancy co-processor, and other pieces to make FI attacks more difficult. But security on paper often does not mean security in real-life. Luckily for us, Raspberry Pi also ran the RP2350 Hacking Challenge: A public bug bounty that has exactly these attacks in-scope. During the hacking challenge 5 different attacks were found on the secure-boot process - one of which was shown at 38C3 by Aedan Cullen. In this talk, we talk about all successful attacks - including laser fault-injection, a reset glitch, and a double-glitch during execution of the bootrom - to show all the different ways in which a chip can be attacked. We also talk about the awesomeness of an open security-ecosystem for chips: Raspberry Pi was very transparent on the findings, and worked with researchers to improve the new revision of the chip. stacksmashing nsr https://events.ccc.de/congress/2025/hub/event/detail/of-boot-vectors-and-double-glitches-bypassing-rp2350-s-secure-boot https://cfp.cccv.de/39c3/talk/ZLNZUS/ https://cfp.cccv.de/39c3/talk/ZLNZUS/feedback/ false 2025-12-27T17:15:00+01:00 17:15 01:00 Ground 39c3-handy-weg-bis-zur-ausreise-wie-cellebrite-ins-auslanderamt-kam de Ethics, Society & Politics Talk Seit Anfang 2024 dürfen Ausländerbehörden Smartphones von ausreisepflichtigen Menschen nicht nur durchsuchen, sondern gleich ganz behalten – „bis zur Ausreise“. Was als geringfügige Änderung im Aufenthaltsgesetz daherkommt, erweist sich als massiver Eingriff in Grundrechte: Menschen verlieren nicht nur die Kontrolle über ihre Daten, sondern auch ihr wichtigstes Kommunikationsmittel – auf unbestimmte Zeit. Hier hört ihr, welche absurden Blüten das treibt. Von Bayern bis NRW haben Bundesländer inzwischen eigene IT-forensische Tools für ihre Behörden angeschafft, um auf den Geräten nach “Indizien” für die Herkunft zu suchen. Sie setzen Methoden ein, wie wir sie sonst aus Ermittlungsverfahren oder von Geheimdiensten kennen – um die Geräte von Menschen zu durchsuchen, die nichts verbrochen haben. Seit Anfang 2024 dürfen Ausländerbehörden Smartphones von ausreisepflichtigen Menschen nicht nur durchsuchen, sondern gleich ganz behalten – „bis zur Ausreise“. Was als geringfügige Änderung im Aufenthaltsgesetz daherkommt, erweist sich als massiver Eingriff in Grundrechte: Menschen verlieren nicht nur die Kontrolle über ihre Daten, sondern auch ihr wichtigstes Kommunikationsmittel – auf unbestimmte Zeit. Hier hört ihr, welche absurden Blüten das treibt. Von Bayern bis NRW haben Bundesländer inzwischen eigene IT-forensische Tools für ihre Behörden angeschafft, um auf den Geräten nach “Indizien” für die Herkunft zu suchen. Sie setzen Methoden ein, wie wir sie sonst aus Ermittlungsverfahren oder von Geheimdiensten kennen – um die Geräte von Menschen zu durchsuchen, die nichts verbrochen haben. Im Vortrag zeige ich, welche absurden Konsequenzen das für die Betroffenen mit sich bringt, welche Bundesländer an der traurigen Spitze der Statistik stehen – und wie sich das Ganze in das Arsenal der digitalen und sonstigen Repressionen von Geflüchteten einreiht. Chris Köver https://events.ccc.de/congress/2025/hub/event/detail/handy-weg-bis-zur-ausreise-wie-cellebrite-ins-auslanderamt-kam https://cfp.cccv.de/39c3/talk/7LCNLY/ Slides https://cfp.cccv.de/39c3/talk/7LCNLY/feedback/ false 2025-12-27T19:15:00+01:00 19:15 01:00 Ground 39c3-and-so-it-begins-wie-unser-rechtsstaat-auf-den-highway-richtung-trumpismus-rast-und-warum-afghanische-klager-innen-fur-uns-die-notbremse-ziehen de Ethics, Society & Politics Talk Wenn die Regierung sich nicht mehr an das eigene Recht gebunden fühlt, markiert das nicht nur einen politischen Spurwechsel, sondern die Auffahrt auf den Highway to Trumpism. Zeit die Notbremse zu ziehen! Normalerweise trifft es in solchen Situationen immer zuerst diejenigen, die sich am wenigsten wehren können. Doch was passiert, wenn genau diese Menschen mit juristischen Werkzeugen bewaffnet werden, um zurückzuschlagen? Anhand von über 100 Klagen afghanischer Schutzsuchender zeigen wir, wie Ministerien das Bundesaufnahmeprogramm sabotieren, Gerichte sie zurückpfeifen – und die Zivilgesellschaft zum letzten Schutzwall des Rechtsstaats wird. Und wir verraten, warum sich Beamte im BAMF vielleicht lieber krankmelden sollten und welche anderen Möglichkeiten sie haben, um nicht straffällig zu werden. • Versprochen ist versprochen und wird auch nicht gebrochen“ – das lernen wir schon als Kinder. Aber der Kindergarten ist schon lange her, und Politiker*innen haben zwar oft das Auftreten eines Elefanten, aber das Gedächtnis eines Goldfischs. • Deswegen hätte die Bundesregierung auch fast 2.500 Afghan*innen mit deutschen Aufnahmezusagen in Islamabad „vergessen“, die dort seit Monaten auf die Ausstellung ihrer deutschen Visa warten • Das Kalkül dahinter: Pakistan erledigt die Drecksarbeit und schiebt sie früher oder später ab, Problem solved! - selbst wenn dabei Menschenleben auf dem Spiel stehen. • Wie kann die Zivilgesellschaft die Notbremse ziehen, wenn sich Regierung und Verwaltung nicht mehr an das eigene Recht gebunden fühlen? • Eine Möglichkeit: wir vernetzen die afghanischen Familien mit Anwält*innen, damit sie Dobrindt und Wadephul verklagen - und sie gewinnen! Die Gerichtsbeschlüsse sind eindeutig: Visa sofort erteilen – sonst Strafzahlungen! Inzwischen laufen über 100 Verfahren an vier Verwaltungsgerichten, weitere kommen täglich hinzu. • Das dürfte nicht ganz das gewesen sein, was die neue Bundesregierung meinte, als sie im Koalitionsvertrag verkündete, „freiwillige Aufnahmeprogramme so weit wie möglich zu beenden“. Übersetzung der politischen Realitätsversion: Wenn es nach Dobrindt und dem Kanzler geht, sollen möglichst gar keine Schutzsuchenden aus Afghanistan mehr nach Deutschland kommen – rechtsverbindliche Aufnahmezusagen hin oder her. Einreisen dürfen nur noch anerkannte Terroristen aus der Taliban-Regierung, um hier in Deutschland die afghanischen Botschaften und Konsulate zu übernehmen • Durch die Klagen konnten bereits 78 Menschen einreisen, etwa 80 weitere Visa sind in Bearbeitung – und weitere werden vorbereitet. • Doch wie in jedem Drehbuch gilt: The Empire strikes back! Die Regierung entwickelt laufend neue Methoden, um Urteile ins Leere laufen zu lassen und Einreisen weiterhin zu blockieren. • Willkommen im „Trumpismus made in Germany“. Eva Elaha https://events.ccc.de/congress/2025/hub/event/detail/and-so-it-begins-wie-unser-rechtsstaat-auf-den-highway-richtung-trumpismus-rast-und-warum-afghanische-klager-innen-fur-uns-die-notbremse-ziehen https://cfp.cccv.de/39c3/talk/8TLLST/ Slides https://cfp.cccv.de/39c3/talk/8TLLST/feedback/ false 2025-12-27T20:30:00+01:00 20:30 01:00 Ground 39c3-excuse-me-what-precise-time-is-it en Hardware Talk With PTP 1588, AES67, and SMPTE 2110, we can transmit synchronous audio and video with sub-millisecond latency over the asynchronous medium Ethernet. But how do you make hundreds of devices agree on the exact same nanosecond on a medium that was never meant to care about time? Precision Time Protocol (IEEE 1588) tries to do just that. It's the invisible backbone of realtime media standards like AES67 and SMPTE 2110, proprietary technologies such as Dante, and even critical systems powering high-frequency trading, cellular networks, and electric grids. Where even a few microseconds of drift can turn perfect sync into complete chaos. This talk takes a deep dive into the mysterious world of precise time distribution in large networks. We’ll start by exploring how PTP 1588 actually works, from announce, sync, and follow-up messages to delay measurements and the magic of hardware timestamping. We’ll look at why PTP is critical for modern audio/video-over-IP standards like AES67 and SMPTE 2110, and how they push Ethernet to its absolute temporal limits. Along the way, we’ll discover how transparent and boundary clocks fight jitter, and why your switch’s buffer might secretly hate you. We will do live Wireshark dissections of real PTP traffic, demos showing what happens when timing breaks, and some hands-on hardware experiments with grandmasters and followers trying to stay in sync. Expect packets, graphs, oscilloscopes, crashing live demos and at least one bad joke about time travel. https://cfp.cccv.de/media/39c3/submissions/VRFMFJ/Bildschirmfoto_2025-10-23_um_11.30.28_e_vVHCxu3.webp Oliver Ettlin https://events.ccc.de/congress/2025/hub/event/detail/excuse-me-what-precise-time-is-it https://cfp.cccv.de/39c3/talk/VRFMFJ/ PTP Wireshark File Powerpoint mit Folien https://cfp.cccv.de/39c3/talk/VRFMFJ/feedback/ false 2025-12-27T21:45:00+01:00 21:45 01:00 Ground 39c3-radikalisierungspipeline-esoterik-von-eso-nazis-de de Ethics, Society & Politics Talk Der amtierende US-Präsident postet ein Video, in dem er Demonstrierende aus einem Kampfjet heraus mit Fäkalien bewirft und das Weiße Haus zelebriert den „Star Wars Day“ mit einem pompösen Trump-Bild mit Lichtschwert. Accounts von AfD-Sympathisanten posten KI-Kitsch einer vermeintlich heilen Welt voller blonder Kinder und Frauen im Dirndl. Ist das lediglich eine geschmackliche Entgleisung oder steckt da mehr dahinter? KI-generierter Content ist aus der Kommunikationsstrategie autoritärer Akteure nicht mehr wegzudenken. Social Media wird derzeit mit rechtem KI-Slop geflutet, in dem wahlweise die Welt dank Migration kurz vor dem Abgrund steht oder blonde, weiße Familien fröhlich Fahnen schwenken. Im politischen Vorfeld der extremen Rechten werden zudem immer häufiger mal mehr oder weniger offensichtliche Deepfakes geteilt, die auf die jeweilige politische Botschaft einzahlen. Das reicht von KI-generierten Straßenumfragen über Ausschnitte aus Talksendungen, die nie stattgefunden haben, bis hin zu gänzlich KI-generierten Influencerinnen (natürlich blond). Was macht das mit politischen Debatten? Und wie sollten wir als Gesellschaft damit umgehen? Katharina Nocun https://events.ccc.de/congress/2025/hub/event/detail/radikalisierungspipeline-esoterik-von-eso-nazis-de https://cfp.cccv.de/39c3/talk/7SWYYC/ https://cfp.cccv.de/39c3/talk/7SWYYC/feedback/ false 2025-12-27T23:00:00+01:00 23:00 00:40 Ground 39c3-breaking-architecture-barriers-running-x86-games-and-apps-on-arm en Hardware Talk Presenting FEX, a translation layer to run x86 apps and games on ARM devices: Learn why x86 is such a pain to emulate, what tricks and techniques make your games fly with minimal translation overhead, and how we are seamless enough that you'll forget what CPU you're using in the first place! ARM-powered hardware in laptops promises longer battery life at the same compute performance as before, but a translation layer like FEX is needed to run existing x86 software. We'll look at the technical challenges involved in making this possible: designing a high-performance binary recompiler, translating Linux system calls across architectures, and forwarding library calls to their ARM counterparts. Gaming in particular poses extreme demands on FEX and raises further questions: How do we enable GPU acceleration in an emulated environment? How can we integrate Wine to run Windows games on Linux ARM? Why is Steam itself the ultimate boss battle for x86 emulation? And why in the world do we care more about page sizes than German standardization institutes? This talk will be accessible to a technical audience and gaming enthusiasts alike. However, be prepared to learn cursed knowledge you won't be able to forget! Tony Wasserka https://events.ccc.de/congress/2025/hub/event/detail/breaking-architecture-barriers-running-x86-games-and-apps-on-arm https://cfp.cccv.de/39c3/talk/JVGQEN/ https://cfp.cccv.de/39c3/talk/JVGQEN/feedback/ false 2025-12-27T23:55:00+01:00 23:55 00:40 Ground 39c3-ai-generated-content-in-wikipedia-a-tale-of-caution en Ethics, Society & Politics Talk I successfully failed with a literature related project and accidentally built a ChatGPT detector. Then I spoke to the people who uploaded ChatGPT generated content on Wikipedia. It began as a standard maintenance project: I wanted to write a tool to find and fix broken ISBN references in Wikipedia. Using the built-in checksum, this seemed like a straightforward technical task. I expected to find mostly typos. But I also found texts generated by LLMs. These models are effective at creating plausible-sounding content, but (for now) they often fail to generate correct checksums for identifiers like ISBNs. This vulnerability turned my tool into an unintentional detector for this type of content. This talk is the story of that investigation. I'll show how the tool works and how it identifies this anti-knowledge. But the tech is only half the story. The other half is human. I contacted the editors who had added this undeclared AI content. I will talk about why they did it and how the Wikipedians reacted and whether "The End is Nigh" calls might be warranted. Mathias Schindler https://events.ccc.de/congress/2025/hub/event/detail/ai-generated-content-in-wikipedia-a-tale-of-caution https://cfp.cccv.de/39c3/talk/9KWKDP/ Slides https://cfp.cccv.de/39c3/talk/9KWKDP/feedback/ false 2025-12-27T11:00:00+01:00 11:00 00:40 Zero 39c3-a-tale-of-two-leaks-how-hackers-breached-the-great en Security Talk The Great Firewall of China (GFW) is one of, if not arguably the most advanced Internet censorship systems in the world. Because repressive governments generally do not simply publish their censorship rules, the task of determining exactly what is and isn’t allowed falls upon the censorship measurement community, who run experiments over censored networks. In this talk, we’ll discuss two ways censorship measurement has evolved from passive experimentation to active attacks against the Great Firewall. While probing the Great Firewall’s DNS injection system in 2021, we noticed something strange: Sometimes the injected responses contained weird garbage. After some investigation, we realized we’d stumbled onto a memory disclosure vulnerability that would give us an unprecedented window into the Great Firewall’s internals: Wallbleed. So we crafted probes that could leak up to 125 bytes per response and repeatedly sent them for two years. Five billion responses later, the picture that emerged was... concerning. Over 2 million HTTP cookies leaked. Nearly 27,000 URL parameters with passwords. SMTP commands exposing email addresses. We found traffic from RFC 1918 private addresses - suggesting we were seeing the Great Firewall’s own internal network. We saw x86_64 stack frames with ASLR-enabled pointers. We even sent our own tagged traffic into China and later recovered those exact bytes in Wallbleed responses, proving definitively that real user traffic was being exposed. In September 2023, the patching began. We watched in real-time as blocks of IP addresses stopped responding to our probes. But naturally the same developers that made this error in the first place made further mistakes. Within hours, we developed “Wallbleed v2” queries that still triggered the leak. The vulnerability persisted for another six months until March 2024. GFW measurement research went back to business as usual until September of this year when an anonymous source released 600GB of leaked source code, packages, and documentation via Enlace Hacktivista. This data came from Geedge Networks - a company closely connected to the GFW and the related MESA lab. Geedge Networks develops censorship software not only for the GFW but also for other repressive countries such as Pakistan, Myanmar, Kazakhstan, and Ethiopia. We will discuss some of our novel findings from the Geedge Networks leak, including new insights about how the leak relates to Wallbleed. Wallbleed and the Geedge Networks leak show that censorship measurement research can be about more than just actively probing censored networks. We hope this talk will be a call to arms for hackers against Internet censorship. More information about Wallbleed can be found at the GFW Report: https://gfw.report/publications/ndss25/en/ Jade Sheffey https://events.ccc.de/congress/2025/hub/event/detail/a-tale-of-two-leaks-how-hackers-breached-the-great https://cfp.cccv.de/39c3/talk/FT3MEL/ https://cfp.cccv.de/39c3/talk/FT3MEL/feedback/ false 2025-12-27T11:55:00+01:00 11:55 00:40 Zero 39c3-isdn-pots-telephony-at-congress-and-camp en Hardware Talk Like 39C3, the last CCC camp (2023) and congress (38C3) have seen volunteer-driven deployments of legacy ISDN and POTS networks using a mixture of actual legacy telephon tech and custom open source software. This talk explains how this is achieved, and why this work plays an important role in preserving parts of our digital communications heritage. Just like at this very event (39C3), the last few years a small group of volunteers has delpoyed and operated legacy telephony networks for ISDN (digital) and POTS (analog) services at CCC-camp2023 and 38C3. Anyone on-site can obtain subscriber lines (POTS, ISDN BRI or PRI service) and use them for a variety of services, including telephony, fax machines, modem dial-up into BBSs as well as dial-up internet access and video telephony. These temporary event networks are not using soft-PBX or VoIP, but are built using actual de-commissioned hardware from telecom operators, including a Siemens EWSD digital telephone exchange, Nokia EKSOS V5 access multiplexers, a SDH ring for transporting E1 carriers and much more. While some may enjoy this for the mere hack value, others enjoy it to re-live the digital communication sear of their childhood or youth. Howevre, there is a more serious aspect to this: The preservation and restoration of early digital communications infrastructure from the 1970s to 1990s, as well as how to operate such equipment. As part of this effort, we have already been able to help communications museums to fill gaps in their collections. The talk will cover * the equipment used, * the network hierarchy we build, * the services operated * the lessons learnt * newly-written open source software for interfacing retro telcommunications gear https://cfp.cccv.de/media/39c3/submissions/LHG99W/c3isdn_CSM0ZC5.svg Harald "LaF0rge" Welte https://events.ccc.de/congress/2025/hub/event/detail/isdn-pots-telephony-at-congress-and-camp https://cfp.cccv.de/39c3/talk/LHG99W/ https://cfp.cccv.de/39c3/talk/LHG99W/feedback/ false 2025-12-27T12:50:00+01:00 12:50 00:40 Zero 39c3-fetap-611-unplugged-taking-a-rotary-dial-phone-to-the-mobile-age en Hardware Talk This project transforms a classic rotary phone into a mobile device. Previous talks have analyzed various aspects of analogue phone technology, such as rotary pulse detection or ringing voltage generation. Now this project helps you get rid of the cable: it equips the classic German FeTAp 611 with battery power and a flyback SMPS based ringing voltage generator - but still maintains the classical look and feel. The talk demonstrates the journey of bridging analog and digital worlds, explaining how careful design connects a vintage phone to today’s mobile environment - in a way that will make your grandparents happy. There are people who throw away old telephones - and then there are those who find them in the garbage and think, „How can a microcontroller actually read the digits from a rotary dial?“ This talk follows the journey of transforming a classic German FeTAp 611 rotary phone into a mobile device while keeping its vintage charm. Building on earlier retrofits, this project aims to combine the following design goals into a mobile version of the Fernsprechtischapparat: - Grandparents-compatible – The phone shall be easy to use by non-technical people, showing the same look and feel as the original phones, including details such as a dial tone. - easy phone switching – Switching between FeTAp and regular cellphone shall not require unscrewing the phone to switch SIM cards. - standard components – PCB/PCBA suppliers shall be capable of manufacturing boards at a reasonable price. - device-agnostic circuit design – Adapting to different phones (e.g. W48, FeTAp 791, FeTAp 611) shall minimize the need for changes in the schematic. This includes a ringing voltage generator that shall be powerful enough to drive an old W48 phone. This talk will walk you through certain aspects of the German analog telephony standard 1TR110-1, and the challenges faced when implementing those on a battery-powered device with little space. It explains - the state machine implemented on an STM32 microcontroller, - how to connect old carbon microphones to modern audio electronics, - designing (and avoiding mistakes in) a flyback based SMPS to generate 32V - 75V ringing voltage, - how to generate 25 Hz AC using an H-bridge, - and how to layout the PCB such that the ancient second handset connector can now be used for USB-C charging. In the course of the development, I discovered that the project is not only a good way to get a glimpse into various aspects of ancient and modern types of electronics - but also into people’s reactions when such a phone suddenly starts ringing on a flea market… :-) Michael Weiner https://events.ccc.de/congress/2025/hub/event/detail/fetap-611-unplugged-taking-a-rotary-dial-phone-to-the-mobile-age https://cfp.cccv.de/39c3/talk/DE97UE/ Presentation Slides https://cfp.cccv.de/39c3/talk/DE97UE/feedback/ false 2025-12-27T13:50:00+01:00 13:50 00:40 Zero 39c3-developing-new-medicines-in-the-age-of-ai-and-personalized-medicine en Science Talk Did you ever wonder where all the drugs, which you can get at a pharmacy, come from? Who makes them, and how? Well, there is no easy answer, because the process of drug discovery and development is a very complex, expensive, and challenging journey, riddled with many risks and failures. This holds true for all types of drugs, from a simple pill to an mRNA vaccine or a gene therapy. Today, scientists support this process with a variety of AI applications, cutting-edge technologies, automation, and a huge amount of data. But can the race for new medicines and cures succeed only through more technology, or do we need to rethink the entire process? Let’s take a look at how the drug discovery and development process has worked so far, and how this entire process is changing – for better or worse. After presenting a high-level overview of the path from an idea to the medicine that you can buy at a pharmacy, this talk will present and discuss the following aspects of the drug discovery and development process: (1) The translation of an idea into a drug for a human patient faces many critical moments along the development process. This so-called “translational gap” is addressed through experiments in a test tube (or Petri dish), experimentation in lab animals, and eventually testing in humans. However, findings in a standard cell line or in a mouse do not necessarily reflect the complexity of biological processes in a human patient. Currently, there are many technological advancements under way to improve the current drug discovery and development process, and possibly even replace animal studies in the future (e.g., organs-on-chip). Nevertheless, the fundamental issues surrounding translational research remain, such as the lack of standardization, the limitations of model systems, and various underlying clinical biases. (2) Like in many industries today, AI applications are introduced at multiple levels and for various purposes within the drug discovery and development continuum. Often, a lot of hope is placed in AI-based technologies to accelerate the R&D process, increase efficiency and productivity, and identify new therapeutic approaches. Indeed, there are many highly useful examples, such as the automation of image analysis in research, which replaces repetitive tasks and hence frees up a lot of time for researchers to do meaningful research. However, there are also many applications that are likely misguided, because they still face fundamental problems in evaluating scientific knowledge. For instance, the use of LLMs to summarize huge amounts of very complex and heterogeneous scientific data relies on the accuracy, completeness, and reproducibility of the available scientific data, which is often not the case. In addition, AI is often employed in an IT environment with questionable data security and ownership practices, such as the storage of sensitive research data on third-party cloud platforms. (3) Until now, the overwhelming majority of drugs have been developed to treat large patient populations, which represent a considerable market and ultimately ensure a return on investment. Today, however, most common and homogeneous diseases can already be managed, often with several (generic) drugs. Slight improvements to current drugs do not justify a large profit margin anymore, so the focus of drug discovery and development is shifting toward more heterogeneous and rare diseases, for which no or only poor treatments are available. Novel medicines in those disease areas hold the promise of substantial improvement for patients; however, these new patient (sub)populations, and thus markets, are much smaller, leading to premium prices for individualized therapies in order to ensure a return on investment. This paradigm shift toward individualized therapy - referred to as precision and personalized medicine - is supported by the advent of novel technologies and the accumulation of large bodies of data. (4) The rise of precision and personalized medicine is challenging the current business model of today’s pharmaceutical industry, suggesting that the era of blockbuster drugs might be over. Moreover, many intellectual property rights for blockbuster drugs are going to expire in the next few years, ending the market dominance of a number of pharma companies and sending the current industry landscape into turmoil. These developments will likely alter the current modus operandi of the entire biopharmaceutical development process, and it is not clear how the next few years will look like. Dennis Özcelik https://events.ccc.de/congress/2025/hub/event/detail/developing-new-medicines-in-the-age-of-ai-and-personalized-medicine https://cfp.cccv.de/39c3/talk/SMWCFE/ https://cfp.cccv.de/39c3/talk/SMWCFE/feedback/ false 2025-12-27T14:45:00+01:00 14:45 01:00 Zero 39c3-kim-1-5-noch-mehr-kaos-in-der-medizinischen-telematikinfrastruktur-ti de Security Talk Zwei Jahre nach dem ersten KIM-Vortrag auf dem 37C3: Die gezeigten Schwachstellen wurden inzwischen geschlossen. Weiterhin können mit dem aktuellen KIM 1.5+ nun große Dateien bis 500 MB übertragen werden, das Signaturhandling wurde für die Nutzenden vereinfacht, indem die Detailinformationen der Signatur nicht mehr einsehbar sind. Aber ist das System jetzt sicher oder gibt es neue Probleme? KIM hat sich als Dienst für medizinische E-Mails etabliert: Elektronische Arbeitsunfähigkeitsbescheinigungen (eAU), zahnärztliche Heil- und Kostenpläne, Laborinformationen, und Medikamentendosierungen sollen sicher per KIM übermittelt werden. Die Sicherheit soll unauffällig und automatisiert im Hintergrund, ohne Interaktion mit den Benutzenden gewährleistet werden. Dazu werden die Ver- und Entschlüsselung sowie die Signierungsfunktionalitäten in einer extra Software, dem sogenannten Clientmodul, abstrahiert. In diesem Vortrag wird das Design dieser Sicherheits-Abstraktion und dadurch bedingte Schwachstellen, wie das Fälschen oder Entschlüsseln von KIMs, beleuchtet. Fortsetzung von 37C3: KIM: Kaos In der Medizinischen Telematikinfrastruktur (TI) [https://media.ccc.de/v/37c3-12030-kim_kaos_in_der_medizinischen_telematikinfrastruktur_ti] Christoph Saatjohann https://events.ccc.de/congress/2025/hub/event/detail/kim-1-5-noch-mehr-kaos-in-der-medizinischen-telematikinfrastruktur-ti https://cfp.cccv.de/39c3/talk/TKSNNS/ https://cfp.cccv.de/39c3/talk/TKSNNS/feedback/ false 2025-12-27T16:00:00+01:00 16:00 01:00 Zero 39c3-ki-digitalisierung-und-longevity-als-fix-fur-ein-kaputtes-gesundheitssystem de Ethics, Society & Politics Talk Großen Herausforderungen im Gesundheitswesen soll mittels Technik und Eigenverantwortung begegnet werden. Die Hoffnung: „KI“ und Digitalisierung machen das System effizienter; Selbstoptimierung und mehr Eigenverantwortung halten die Menschen länger gesund. Der Vortrag analysiert aktuelle Diskurse rund um Digitalisierung und Gesundheit, und fragt kritisch, wie diese Entwicklung ohnehin bestehende soziale Ungleichheiten verschärfen könnte. Am Ende bleibt die Frage: Wie könnten tragfähige Lösungen fürs Gesundheitssystem aussehen? In der Analyse sind sich alle einig: Das Gesundheitssystem steht vor großen Herausforderungen, die von explodierenden Kosten, wachsenden Zugangsbarrieren bis hin zum anstehenden demographischen Wandel reichen: viele Menschen werden alt und kränker, während gleichzeitig sehr viele Mitarbeiter:innen des Gesundheitswesens in Rente gehen. Wir brauchen also Lösungen fürs Gesundheitssystem, die nachhaltig tragen und Menschenwürde ermöglichen. Während ganz unterschiedliche Lösungsansätze diskutiert werden, taucht ein Narrativ immer wieder auf: Dass Digitalisierung durch massive Effizienzgewinne die bestehenden Probleme im Gesundheitswesen fixen werden: Dank „KI“ sollen Menschen weniger häufig Ärzt:innen brauchen, zum Beispiel, indem durch Symptomchecker und Co vorgefiltert wird, wer wirklich behandelt werden muss, und wer nicht. Manche behaupten, dass Hausärzt:innen künftig ein vielfaches an Patient:innen behandeln könnten, wenn nur die richtigen technischen Hilfsmittel gefunden wurden. Und längst befinden wir uns tatsächlich in einer Realität, in der Chats mit LLMs an vielen Stellen zumindest Dr. Google ersetzt haben. Weitere Lösungsansätze zielen auf mehr Eigenverantwortung ab: "Longevity" ist das Trendwort in aller Munde. Ein Ansatz der „Langlebigkeit“, der maßgeblich durch technische Maßnahmen gestützt sein soll: Selbstoptimierung per App, „KI“ als individueller Gesundheitsassistent und allerlei experimentelle Untersuchungen. Die Grundidee: Wenn Menschen länger gesund bleiben und leben, wird das Gesundheitssystem weniger belastet, während Menschen länger zu Gesellschaft und Wirtschaft beitragen können. Die ideologischen Grundzüge und Geschäftsmodelle der „Longevity“ kommen aus den USA, von Tech-Milliardären und ihren Unsterblichkeitsfantasien bis hin zu wenig seriösen Gesundheitsinfluencer:innen, die am Ende oft mehr schaden als dass sie zu einem größeren Wohlbefinden ihrer Kund:innen beitragen würden - und trotzdem hunderttausende auf Social Media in ihren Bann ziehen. Der Vortrag zieht Verbindungslinien zwischen naiver Technikgläubigkeit, aktuellen Diskursen im Gesundheitswesen, ihren fragwürdigen ideologischen Wurzeln und der Frage, wie wir Herausforderungen und insbesondere sozialen Ungleichheiten im Feld der Gesundheit wirklich effektiv begegnen. Manuel Hofmann https://events.ccc.de/congress/2025/hub/event/detail/ki-digitalisierung-und-longevity-als-fix-fur-ein-kaputtes-gesundheitssystem https://cfp.cccv.de/39c3/talk/WTKXJZ/ https://cfp.cccv.de/39c3/talk/WTKXJZ/feedback/ false 2025-12-27T17:15:00+01:00 17:15 01:00 Zero 39c3-pwn2roll-who-needs-a-599-remote-when-you-have-wheelchair-py en Hardware Talk A 595€ wheelchair remote that sends a handful of Bluetooth commands. A 99.99€ app feature that does exactly what the 595€ hardware does. A speed upgrade from 6 to 8.5 km/h locked behind a 99.99€ paywall - because apparently catching the bus is a premium feature. Welcome to the wonderful world of DRM in assistive devices, where already expensive basic mobility costs extra and comes with in-app purchases! And because hackers gonna hack, this just could not be left alone. This talk depicts the reverse engineering of a popular electric wheelchair drive system - the Alber e-motion M25: a several thousand euro assistive device that treats mobility like a SaaS subscription. Through Android app reverse engineering, proprietary Bluetooth protocol analysis, hours of staring at hex dumps (instead of the void), and good old-fashioned packet sniffing, we'll expose how manufacturers artificially limit essential features and monetize basic human mobility. What you'll learn: - how a 22-character QR code sticker, labeled as "Cyber Security Key", becomes AES encryption - why your 6000€ wheelchair drive includes an app with Google Play Billing integration for features the hardware already supports - the internals, possibilities and features of electronics worth 30€ cosplaying as a 595€ medical device - the technical implementation of the "pay 99.99€ or stay slow" speed limiter (6 km/h vs 8.5 km/h) - how nearly 2000€ in hardware and app features can be replaced by a few hundred lines of Python - why the 8000€ even more premium (self-driving) variant is literally identical hardware with a different Boolean flag and firmware plus another (pricier) remote We'll cover the complete methodology: from initial reconnaissance, sniffing and decrypting packets to reverse-engineer the proprietary communication protocol, to PoCs of Python replacements, tools, techniques, and ethical considerations of reverse engineering medical devices. This is a story about artificial scarcity, exploitative DRM, ethics and industry power, and how hacker-minded creatures should react and act to this. This talk will be simultaneously interpretated into German sign language (Deutsche Gebärdensprache aka. DGS). https://cfp.cccv.de/media/39c3/submissions/BWHWPG/you_wouldnt_hack_a_wheelchair_AEfcGlj_s_64Ik0Qq.webp elfy https://events.ccc.de/congress/2025/hub/event/detail/pwn2roll-who-needs-a-599-remote-when-you-have-wheelchair-py https://cfp.cccv.de/39c3/talk/BWHWPG/ https://cfp.cccv.de/39c3/talk/BWHWPG/feedback/ false 2025-12-27T19:15:00+01:00 19:15 01:00 Zero 39c3-1965-60-years-of-algorithmic-art-with-computers en Art & Beauty Talk What power structures are inherent to the field of computer-generated art? In the year 1965, so 60 years ago, the first three exhibitions of art created with the help of computers took place - in part independently of each other. We want to present the interesting aspects of developments since then and discuss them with Frieder Nake, one of the people who exhibited in those very beginnings and followed those developments with a critical attitude. We want to look at the complex topic of art created with computers, beginning with some careful and barely noticed first experiments and emerging into an ever more diverse and creative field, from different angles. In particular, we want to focus on the dynamics of power and how these developments were influenced by their context - from social movements to political pressure. We want to start with explaining how the initial developments, both from an artistic - concrete art - and technological - the evolution of computers and the creation of the drawing machine Zuse Z64 in Germany and film techniques in the US, respectively - took place. We will do so in the context of the first three exhibitions that all took place in the year 1965. Their artworks were created by Georg Nees in Stuttgart, A. Michael Noll with Béla Julesz in New York and Frieder Nake with Georg Nees, again in Stuttgart. In the following, we will try to give an outline of further developments. We provide examples how hierachies in art and science have developed and played a role in different events. In the domain of computer-generated art, similar to other art, there are two large influences hidden for the typical recipent of this art - galleries and critics. We will discuss this exemplary with early exhibitions of Frieder Nake being described by the FAZ and later on, how the east-west conflict has influenced the art and its exhibitions. Among other issues, we discuss patriarchal structures, the commercial side of art, how old tech is sold as revolutionary and how progress is still as connected with threatening feelings as in the early years. Looking back at the beginnings, it is interesting to observe how artists - also with an artistic, rather than technical background - worked with the limitations and overcame them. Fortunately, the technological entry barrier to create algorithmic art yourself has drastically decreased over time and we want to encourage you to experiment yourself! Frieder Nake is creating algorithmic drawings and doing visual research since 1964. In 1971, he published the influential essay "there should be no computer art" and he has been teaching computer graphics at the University of Bremen for decades. Enna Gerhard is pursuing a PhD in theory of computer science and creates algorithmic drawings in the meantime. https://cfp.cccv.de/media/39c3/submissions/NB9YD3/picture_YnXOMrJ_C8ulon9_pG6R2Zo_li9AA2C.webp Enna Gerhard Frieder Nake https://events.ccc.de/congress/2025/hub/event/detail/1965-60-years-of-algorithmic-art-with-computers https://cfp.cccv.de/39c3/talk/NB9YD3/ Slides https://cfp.cccv.de/39c3/talk/NB9YD3/feedback/ false 2025-12-27T20:30:00+01:00 20:30 01:00 Zero 39c3-bitunlocker-leveraging-windows-recovery-to-extract-bitlocker-secrets en Security Talk This talk reveals our in-depth vulnerability research on the Windows Recovery Environment (WinRE) and its implications for BitLocker, Windows’ cornerstone for data protection. We will walk through the research methodology, uncover new 0-day vulnerabilities, and showcase full-chain exploitations that enabled us to bypass BitLocker and extract all the protected data in several different ways. This talk goes beyond theory - as each vulnerability will be accompanied by a demo video showcasing the complete exploitation chain. To conclude the talk, we will share Microsoft’s key takeaways from this research and outline our approach to hardening WinRE and BitLocker. In Windows, the cornerstone of data protection is BitLocker, a Full Volume Encryption technology designed to secure sensitive data on disk. This ensures that even if an adversary gains physical access to the device, the data remains secure and inaccessible. One of the most critical aspects of any data protection feature is its ability to support recovery operations in case of failure. To enable BitLocker recovery, significant design changes were implemented in the Windows Recovery Environment (WinRE). This led us to a pivotal question: did these changes introduce any new attack surfaces impacting BitLocker? In this talk, we will share our journey of researching a fascinating and mysterious component: WinRE. Our exploration begins with an overview of the WinRE architecture, followed by a retrospective analysis of the attack surfaces exposed with the introduction of BitLocker. We will then discuss our methodology for effectively researching and exploiting these exposed attack surfaces. Our presentation will reveal how we identified multiple 0-day vulnerabilities and developed fully functional exploits, enabling us to bypass BitLocker and extract all protected data in several different ways. Notably, the findings described reside entirely in the software stack, not requiring intrusive hardware attacks to be exploited. Finally, we will share the insights Microsoft gained from this research and explain our approach to hardening and further securing WinRE, which in turn strengthens BitLocker. https://cfp.cccv.de/media/39c3/submissions/HGXNMU/Picture1_lYvtBj8_IzS5zA4.webp Alon Leviev https://events.ccc.de/congress/2025/hub/event/detail/bitunlocker-leveraging-windows-recovery-to-extract-bitlocker-secrets https://cfp.cccv.de/39c3/talk/HGXNMU/ Presentation Slides https://cfp.cccv.de/39c3/talk/HGXNMU/feedback/ false 2025-12-27T21:45:00+01:00 21:45 01:00 Zero 39c3-throwing-your-rights-under-the-omnibus-how-the-eu-s-reform-agenda-threatens-to-erase-a-decade-of-digital-rights en Ethics, Society & Politics Talk A spectre is haunting Europe—the spectre of bureaucracy. All the Powers of old Europe have entered into an unholy alliance to exorcise this spectre: The EU Commission, Member States, industry, even J.D. Vance. This threatens the digital rights and rules built up in the last decade. The new EU Commission has an agenda. What started with the report of former European Central Bank chief Mario Draghi on Europe's "competitiveness" has quickly turned into "getting rid of bureaucracy", then into "simplification", and finally open "deregulation". What this means is that a large number of European laws that were adopted in the last decade to ensure sustanabiliy, protect human rights along the whole supply chain, or to ensure our digital rights, are watered down, and core elements are scrapped. In terms of the EU's digital rulebook, it has already started in May with the deletion of a core compliance element in the General Data Protection Regulation (GDPR) - the obligation to keep records of your processing activities. While it sounds harmless - all the other rights and obligations still appy - it means that companies have no clue anymore what personal data they process, for which purposes, and how. A much larger revision has been proposed on 19th November 2025, with the "omnibus" legislation dubbed "Digital Simplification Package". This will affect rules on data protection, data governance, AI, obligations to report cybersecurity incidents, and protections against cookies and other tracking technologies. Furthermore, the EU's net neutrality rules are scheduled to be opened for reform in December by the so called Digital Networks Act. In this talk we discuss what to expect from the new EU agenda, who is driving it and how to resists. Our goal is to leave you better informed and equipped to fight back against this deregulatory trend. This talk may contain hope. Thomas Lohninger Ralf Bendrath https://events.ccc.de/congress/2025/hub/event/detail/throwing-your-rights-under-the-omnibus-how-the-eu-s-reform-agenda-threatens-to-erase-a-decade-of-digital-rights https://cfp.cccv.de/39c3/talk/GAXEDZ/ https://cfp.cccv.de/39c3/talk/GAXEDZ/feedback/ false 2025-12-27T23:00:00+01:00 23:00 00:40 Zero 39c3-the-eyes-of-photon-science-imaging-simulation-and-the-quest-to-make-the-invisible-visible en Science Talk Science advances by extending our senses beyond the limits of human perception, pushing the boundaries of what we can observe. In photon science, imaging detectors serve as the eyes of science, translating invisible processes into measurable and analysable data. Behind every image lies a deep understanding of how detectors see, respond and perform. At facilities like the European XFEL, the world's most powerful X-ray free-electron laser located in the Hamburg metropolitan area, imaging detectors capture ultrashort X-ray flashes at MHz frame rates and with high dynamic range. Without these advanced detectors, even the brightest X-ray laser beam would remain invisible. They help to reveal what would otherwise stay hidden, such as the structure of biomolecules, the behaviour of novel materials, and matter under extreme conditions. But how do we know they will perform as expected? And how do we design systems capable of “seeing” the invisible? I will take a closer look how imaging technology in large-scale facilities is simulated and designed to make the invisible visible. From predicting detector performance to evaluating image quality, we look at how performance simulation helps scientists and engineers understand the “eyes” of modern science. X-ray imaging detectors have come a long way in the last 15 years, turning ideas that once seemed impossible into realities. Imaging detectors in photon science are more than just high-speed cameras. They are complex systems operating at the limits of what’s physically measurable. Understanding how they behave before, during, and after experiments is essential to advancing both the technology and the science it enables. In this talk, I’ll take you inside the world of detector simulation and performance modelling. I’ll explore how tools like Monte Carlo simulations, sensor response models, and system-level performance evaluations are used to: - Predict detector behaviour in extreme conditions (such as MHz X-ray bursts), and - identify critical performance bottlenecks before production. By linking imaging technology with simulation and modelling, we can better interpret experimental data and design the next generation of scientific cameras. Beyond the technical aspects, this talk reflects on the broader theme of how we “see” though technology, what it means to make the invisible visible, and how simulation changes not only how we build instruments, but also how we understand them. https://cfp.cccv.de/media/39c3/submissions/WULKYL/Markus_Kuster_89CVsdQ_SgYagMH_UXMlkmj.webp MarKuster https://events.ccc.de/congress/2025/hub/event/detail/the-eyes-of-photon-science-imaging-simulation-and-the-quest-to-make-the-invisible-visible https://cfp.cccv.de/39c3/talk/WULKYL/ Presentation Slides - Preliminary https://cfp.cccv.de/39c3/talk/WULKYL/feedback/ false 2025-12-27T23:55:00+01:00 23:55 00:40 Zero 39c3-building-a-noc-from-scratch de CCC & Community Talk Learn from our mistakes during the first iteration of Network Operations for Europe's largest furry convention, Eurofurence. Dieses Jahr hat ein kleines Team aus dem Chaos, Furries und Chaos-Furries ein neues Netzwerk-OC gegründet, um die Eurofurence mit gutem premium 👌 Internetz auszustatten. Wir erzählen von unseren Erfahrungen und den sozialen sowie technischen Herausforderungen. Zum Zeitpunkt der 29. Eurofurence (also dieses Jahr) hatte das Event eine Größe erreicht, bei der typische Event-Locations unsere speziellen Anforderungen nicht mal eben so erfüllen konnten. Beispielsweise ist eine aufwändige Audio/Video-Produktion Teil der Eurofurence, welche ein IP-Netz mit hoher Bandbreite, niederiger Latenz, niedrigem Jitter, Multicast-Transport und präzise Zeitsynchronisierung benötigt. Deshalb wurde dieses Jahr das _Onsite Eurofurence Network Operation Center_ _(EFNOC)_ gegründet. Unsere Aufgabe sollte es sein, alle Anforderungen der anderen Teams kompetent zu erfüllen wovon wir euch in diesem Vortrag etwas aus dem Nähkästchen erzählen wollen. Grob haben wir wärend der EF29 das Team etabliert und ein Netzwerk gebaut, welches für A/V-Produktion, Event-Koordination und Event-Management (z.B. Security, Ticketing) benutzt wurde. Unser persönliches Ziel war es außerdem, ein benutzbares WLAN-Netzwerk für alle Besuchenden über dies gesamte Event-Venue hinweg zu schaffen – also von Halle H bis zum Vorplatz. Unsere Architektur bestand dafür aus einem simplen Layer2-Netzwerk mit VLAN-Unterteilung, welches von _Arista DCS-7050TX-72Q_ mit 40Gbit/s Optiken bereitgestellt wurde. Die Aristas haben außerdem ein PTP-Signal propagiert, welches von einer Meinberg Master-Clock gesteuert wurde. Zusätzlich war ein Linux-Server als Hypervisor für diverse Netzwerk-Services wie DNS, DHCP, Monitoring und Routing im Einsatz. So zumindest der Plan, denn während des Events wurden wir mit der Realität und vielen „spaßigen“ Problemen konfrontiert. Unser Talk wird sich unter anderem mit diesen technischen Problemen beschäftigen, allerdings den Fokus nicht nur auf die technische Darstellung legen. Stattdessen werden wir auch beleuchten, wie wir als Team menschlich untereinander und in der Kommunikation mit anderen Teams damit umgegangen sind. lilly https://events.ccc.de/congress/2025/hub/event/detail/building-a-noc-from-scratch https://cfp.cccv.de/39c3/talk/SRCDYW/ Slides https://cfp.cccv.de/39c3/talk/SRCDYW/feedback/ false 2025-12-27T11:00:00+01:00 11:00 00:40 Fuse 39c3-openautolab-photographic-film-processing-machine-fully-automatic-and-diy-friendly en Hardware Talk OpenAutoLab, an open source machine, that is capable of processing contemporary color and black-and-white films for analogue photography, is being presented here. It made its first public appearance at 37C3 and was already seen there in action, but had no organized talk or proper presentation. Now it is better documented, waits to be built by more people and to be further developed by the community. This talk is about motivation behind developing OpenAutoLab and about the technical decisions made during it. It is argued that any dedicated film photographer is able to get one built. The presentation starts with a short overview of analogue photography processes and motivation of some photographers to shoot film instead of using contemporary digital technology. It covers ways to process the film starting from least involved, such as sending to specialized laboratory, and possible motivation to get a processing machine. Existing film processors are described with their features and deal-breakers for an end-user in 2025. Then the history of developing OpenAutoLab is given, together with important design decisions made during development and why alternative solutions were discarded. In the end the process of building the machine (and sourcing the needed parts) is given with some motivation towards changing it to fit the needs of an individual photographer. https://cfp.cccv.de/media/39c3/submissions/CASXCP/13597be39db7dbce_FcumBNf_UwZmZz1_zGfGiQA.webp Kauz https://events.ccc.de/congress/2025/hub/event/detail/openautolab-photographic-film-processing-machine-fully-automatic-and-diy-friendly https://cfp.cccv.de/39c3/talk/CASXCP/ https://cfp.cccv.de/39c3/talk/CASXCP/feedback/ true 2025-12-27T11:55:00+01:00 11:55 00:40 Fuse 39c3-brennende-walder-und-kommentarspalten-klimaupdate-mit-bits-baume-und-dem-fragdenstaat-climate-helpdesk de Ethics, Society & Politics Talk Das Klima-Update vom FragDenStaat Climate Helpdesk. Chatgpt hat (bald) mehr Nutzer*innen als Wikipedia, OpenAI will in Zukunft den Energieverbrauch von Indien haben und das notfalls auch mit fossilen Energien. Der Energiehunger der künstlichen Intelligenz und der globale Ressourcenhunger für Chips und Elektroautos scheint den Rest Hoffnung einer klimagerechten Welt aufzufressen. Auch in Deutschland finden wir uns in den Wasserkämpfen wieder, während global längst Bewegungen gegen wasserhungrige Konzerne und Rechenzentren zusammenfließen. Auf der ganzen Welt, von Lateinamerika bis Portugal und Serbien wehren sich Menschen gegen den Abbau des weißen Goldes Lithium, das für Elektroautos und Chips benötigt wird. Zusammen mit Wäldern brennen auch die Kommentarspalten und die staatlichen Repressionen gegen Klimaaktivismus nehmen zu. Ich möchte einen Überblick geben zum Zustand unserer Erde und der Klimabewegung und was Hacker*innen für die Rettung des Planeten können und welche Tech-Milliardäre wir dafür bekämpfen müssen. Ich bin Joschi (they/them) vom FragDenStaat Climate Helpdesk. Ich bringe 10 Jahre Erfahrung in der Klimabewegung und Expertise für verschiedene Themen rund um Nachhaltigkeit und Digitalisierung mit. https://cfp.cccv.de/media/39c3/submissions/RGKKJ9/Blaumeise_mitSchluessel_3ilt6je_mnmsVSy_TJkZuFo.webp Joschi Wolf https://events.ccc.de/congress/2025/hub/event/detail/brennende-walder-und-kommentarspalten-klimaupdate-mit-bits-baume-und-dem-fragdenstaat-climate-helpdesk https://cfp.cccv.de/39c3/talk/RGKKJ9/ https://cfp.cccv.de/39c3/talk/RGKKJ9/feedback/ false 2025-12-27T12:50:00+01:00 12:50 00:40 Fuse 39c3-who-cares-about-the-baltic-jammer-terrestrial-navigation-in-the-baltic-sea-region en Security Talk Reports of GNSS interference in the Baltic Sea have become almost routine — airplanes losing GPS, ships drifting off course, and timing systems failing. But what happens when a group of engineers decides to build a navigation system that simply *doesn’t care* about the jammer? Since 2017, we’ve been developing **R-Mode**, a terrestrial navigation system that uses existing radio beacons and maritime infrastructure to provide independent positioning — no satellites needed. In this talk, we’ll share our journey from an obscure research project that “nobody needs” to a system now seen as crucial for resilience and sovereignty. Expect technical insights, field stories from ships in the Baltic, and reflections on what it means when a civilian backup system suddenly attracts military interest. Since 2017, our team at DLR and partners across Europe have been working on an alternative to satellite navigation: **R-Mode**, a backup system based on terrestrial transmitters. Our main testbed spans the Baltic Sea — a region now infamous for GNSS jamming and spoofing. We’ll start by showing what GNSS interference actually means in practice: aircraft losing navigation data, ships switching to manual control, and entire regions facing timing outages — such as the recent disruption of telecommunications in Gdańsk during Easter 2025. Then we’ll take you behind the scenes of building R-Mode: designing signals that can coexist with legacy systems, installing transmitters along the coast, and testing shipborne receivers in rough conditions. We’ll share personal moments — like the first time we received a stable position fix in the middle of the Baltic. Finally, we’ll talk about perception and politics: how a “research curiosity” became a critical infrastructure project, why ESA now wants to build a *satellite* backup (with the same vulnerabilities), and how it feels when your civilian open-source navigation system suddenly becomes strategically relevant. https://cfp.cccv.de/media/39c3/submissions/QPPQ3R/ORMOBASS_2024_GuSS2q0_hKdyYTU.webp Lars Niklas Hehenkamp Markus https://events.ccc.de/congress/2025/hub/event/detail/who-cares-about-the-baltic-jammer-terrestrial-navigation-in-the-baltic-sea-region https://cfp.cccv.de/39c3/talk/QPPQ3R/ https://cfp.cccv.de/39c3/talk/QPPQ3R/feedback/ false 2025-12-27T13:50:00+01:00 13:50 00:40 Fuse 39c3-endlich-maschinenlesbare-urteile-open-access-fur-juristen de Science Talk Zur Überraschung Vieler sind Juristen Wissenschaftler, die nach wissenschaftlichen Maßstäben arbeiten sollten und ihre Schriftsätze und Urteile auch nach stringenten wissenschaftlichen Kriterien gestalten und untereinander diskutieren sollten. Doch nur in einigen Rechtsgebieten funktioniert dies. Wie jede Wissenschaft ist auch die Rechtswissenschaft nur so gut wie das ihr zugrundeliegende Quellenmaterial – in diesem Fall sind das meist Urteile. Empirische Untersuchungen über diese Daten sind nur möglich, wenn sie der Forschung auch zur Verfügung stehen. Doch wissenschaftliche Arbeit im juristischen Feld ist aktuell nicht wirklich möglich, da die wenigsten Urteile veröffentlicht werden, da sich die Gerichte meist vor der dadurch anfallenden Arbeit scheuen. Wir betrachten, warum dies Grundsätze der Rechtsstaatlichkeit infrage stellt und warum Player aus der Wirtschaft mehr über deutsche Rechtsprechung wissen, als unsere Gerichte – und wie sie das zu Geld machen. Es ist tatsächlich ein ernsthaftes und reales wissenschaftliches und gesellschaftliches Problem, wenn Urteile hinter den wurmstichigen Aktenschränken der Amtstuben weggeschlossen werden. Wir belegen das anhand einiger besonders hahnebüchener Zitate aus aktuellen und nicht mehr änderbaren Urteilen aus der Praxis. Wir erarbeiten aktuell Strategien, wie man das Rechtssystem power-cyclen kann, um Urteile in ihrer Gesamtheit, und damit die faktisch gesprochene Rechtslage in Deutschland wieder zugänglich werden. Als positiver Nebeneffekt der Verfügbarkeit von Urteilen kann Zivilgesellschaft und die Politik auch selber souverän überprüfen, ob unsere Richter das Recht typischerweise auch wirklich im Sinne der Legislative anwenden – keiner kann es aktuell wissen, wie können nur hoffen ... Beata Hubrig Nuri Khadem-Al-Charieh https://events.ccc.de/congress/2025/hub/event/detail/endlich-maschinenlesbare-urteile-open-access-fur-juristen https://cfp.cccv.de/39c3/talk/UJA9AF/ https://cfp.cccv.de/39c3/talk/UJA9AF/feedback/ false 2025-12-27T14:45:00+01:00 14:45 00:40 Fuse 39c3-redscout42-zur-digitalen-wohnungsfrage de Ethics, Society & Politics Talk Wer heutzutage eine Wohnung sucht, kommt kaum noch darum herum, sich einen Account bei Immoscout24 & Co. zu erstellen. Diese „Platform Real Estate“ sind eine besondere Art der „Walled Gardens“, die ihr Geschäftsmodell auf die sich immer weiter verschärfende Wohnungskrise ausgerichtet haben. Und das ist äußerst profitabel für die Besitzer dieser Strukturen der Daseinsvorsorge: Im September 2025 stieg Scout24 in den DAX auf und reiht sich damit in Unternehmen wie BMW, Rheinmetall und SAP ein. In unserem Vortrag zeigen wir, wie Immoscout & Co. mit einem ausgeklügelten technischen System Monopolprofite generiert, die Mieten in die Höhe treibt und ein Vermieterparadies aufgebaut hat, das die Mieter:innen in den Wahnsinn treibt. Wir bleiben aber nicht bei der Kritik stehen, sondern zeigen, wie durch die Vergesellschaftung von Plattformen der Daseinsvorsorge ein Werkzeug entstehen kann, das den Mittellosen auf dem Wohnungsmarkt hilft. Vermieter in ihre Schranken zu weisen und Markttransparenz für alle statt nur für die Besitzenden zu schaffen. Sandra Leonard https://events.ccc.de/congress/2025/hub/event/detail/redscout42-zur-digitalen-wohnungsfrage https://cfp.cccv.de/39c3/talk/UXDELZ/ https://cfp.cccv.de/39c3/talk/UXDELZ/feedback/ false 2025-12-27T16:00:00+01:00 16:00 01:00 Fuse 39c3-chaos-all-year-round de CCC & Community Talk Neben dem Congress gibt es noch viele andere Chaos-Events, die über das ganze Jahr verteilt stattfinden. Das Easterhegg, die GPN und die MRMCD kennen vermutlich die meisten Chaos-Wesen. Aber was ist eigentlich mit den ganzen kleineren Veranstaltungen? Bei diesem Vortrag im Lightning-Talk-Format habt ihr die Möglichkeit, euch quasi im Schnelldurchlauf über viele weitere tolle Chaos-Events zu informieren. Zusätzlich werden auch ein bis zwei größere Events vorgestellt, die sich gerade in der Planungsphase befinden und noch Verstärkung für ihr Team suchen. Falls ihr euer Chaos-Event auf der großen Bühne kurz vorstellen möchtet, tragt euch bitte [im Wiki ein](https://events.ccc.de/congress/2025/hub/de/wiki/event-vorstellungen). Deanna https://events.ccc.de/congress/2025/hub/event/detail/chaos-all-year-round https://cfp.cccv.de/39c3/talk/TPZG8S/ https://cfp.cccv.de/39c3/talk/TPZG8S/feedback/ false 2025-12-27T17:15:00+01:00 17:15 01:00 Fuse 39c3-escaping-containment-a-security-analysis-of-freebsd-jails en Security Talk FreeBSD’s jail mechanism promises strong isolation—but how strong is it really? In this talk, we explore what it takes to escape a compromised FreeBSD jail by auditing the kernel’s attack surface, identifying dozens of vulnerabilities across exposed subsystems, and developing practical proof-of-concept exploits. We’ll share our findings, demo some real escapes, and discuss what they reveal about the challenges of maintaining robust OS isolation. FreeBSD’s jail feature is one of the oldest and most mature OS-level isolation mechanisms in use today, powering hosting environments, container frameworks, and security sandboxes. But as with any large and evolving kernel feature, complexity breeds opportunity. This research asks a simple but critical question: If an attacker compromises root inside a FreeBSD jail, what does it take to break out? To answer that, we conducted a large-scale audit of FreeBSD kernel code paths accessible from within a jail. We systematically examined privileged operations, capabilities, and interfaces that a jailed process can still reach, hunting for memory safety issues, race conditions, and logic flaws. The result: roughly 50 distinct issues uncovered across multiple kernel subsystems, ranging from buffer overflows and information leaks to unbounded allocations and reference counting errors—many of which could crash the system or provide vectors for privilege escalation beyond the jail. We’ve developed proof-of-concept exploits and tools to demonstrate some of these vulnerabilities in action. We’ve responsibly disclosed our findings to the FreeBSD security team and are collaborating with them on fixes. Our goal isn’t to break FreeBSD, but to highlight the systemic difficulty of maintaining strict isolation in a large, mature codebase. This talk will present our methodology, tooling, and selected demos of real jail escapes. We’ll close with observations about kernel isolation boundaries, lessons learned for other OS container systems, and a call to action for hardening FreeBSD’s jail subsystem against the next generation of threats. ilja Michael Smith https://events.ccc.de/congress/2025/hub/event/detail/escaping-containment-a-security-analysis-of-freebsd-jails https://cfp.cccv.de/39c3/talk/ARLX3M/ https://cfp.cccv.de/39c3/talk/ARLX3M/feedback/ false 2025-12-27T19:15:00+01:00 19:15 01:00 Fuse 39c3-life-on-hold-what-does-true-solidarity-look-like-beyond-duldung-camps-deportation-and-payment-cards en Ethics, Society & Politics Talk Lager, Duldung, Bezahlkarte, Essensscheine – Criminalization, Radicalization, Reality for Many People in East Germany This talk sheds light on how these terms shape everyday life. We dive into an existence marked by uncertainty, isolation, and psychological strain, both in anonymous big cities and rural areas of East Germany. We ask: What does “solidarity” really mean in this context? In this session, people share everyday experiences with a system that often systematically undermines human rights and dignity. We don’t just talk about the obvious obstacles like the payment card or residency obligation, but also the invisible wounds: the constant fear of deportation, the psychological consequences of isolation, and the daily experience of hostility. We highlight the specific challenges of life in cramped camps on the outskirts of big cities, as well as the social control and visibility in rural communities. However, this talk is not just about naming problems. At its core is the urgent question: What does true solidarity really look like? How can support go beyond symbolic politics and short-term aid offers? This session is an invitation to shift perspectives, listen, and collaboratively develop concrete approaches for a more humane policy and a more solidaric coexistence. H-Shaaib Eric Noel Mbiakeu https://events.ccc.de/congress/2025/hub/event/detail/life-on-hold-what-does-true-solidarity-look-like-beyond-duldung-camps-deportation-and-payment-cards https://cfp.cccv.de/39c3/talk/EMFYMG/ https://cfp.cccv.de/39c3/talk/EMFYMG/feedback/ false 2025-12-27T20:30:00+01:00 20:30 01:00 Fuse 39c3-not-to-be-trusted-a-fiasco-in-android-tees en Security Talk Trusted Execution Environments (TEEs) based on ARM TrustZone form the backbone of modern Android devices' security architecture. The word "Trusted" in this context means that **you**, as in "the owner of the device", don't get to execute code in this execution environment. Even when you unlock the bootloader and Magisk-root your device, only vendor-signed code will be accepted by the TEE. This unfortunate setup limits third-party security research to the observation of input/output behavior and static manual reverse engineering of TEE components. In this talk, we take you with us on our journey to regain power over the highest privilege level on Xiaomi devices. Specifically, we are targeting the Xiaomi Redmi 11s and will walk through the steps necessary to escalate our privileges from a rooted user space (N-EL0) to the highest privilege level in the Secure World (S-EL3). We will revisit old friends like Trusted Application rollback attacks and GlobalPlatform's design flaw, and introduce novel findings like the literal fiasco you can achieve when you're introducing micro kernels without knowing what you're doing. In detail, we will elaborate on the precise exploitation steps taken and mitigations overcome at each stage of our exploit chain, and finally demo our exploits on stage. Regaining full control over our devices is the first step to deeply understand popular TEE-protected use cases including, but not limited to, mobile payment, mobile DRM solutions, and the mechanisms protecting your biometric authentication data. We present novel insights into the current state of TEE security on Android focusing on two widespread issues: missing TA rollback protection and a type confusion bug arising from the GlobalPlatform TEE Internal Core API specification. Our results demonstrate that these issues are so widespread that on most devices, attackers with code execution at N-EL1 (kernel) have a buffet of n-days to choose from to achieve code execution at S-EL0 (TA). Further, we demonstrate how these issues can be weaponized to fully compromise an Android device. We discuss how we exploit CVE-2023-32835, a type confusion bug in the keyinstall TA, on a fully updated Xiaomi Redmi Note 11. While the keyinstall TA shipped in the newest firmware version is not vulnerable anymore, the vulnerability remains triggerable due to missing rollback protections. To further demonstrate how powerful code execution as a TA is, we'll exploit a vulnerability in the BeanPod TEE (used on Xiaomi Mediatek SoCs), to achieve code execution at S-EL3. Full privilege escalations in the TEE are rarely seen on stage, and we are targeting the BeanPod TEE which is based on the Fiasco micro kernel. This target has never been publicly exploited, to the best of our knowledge. Our work empowers security researchers by demonstrating how to regain control over vendor-locked TEEs, enabling deeper analysis of critical security mechanisms like mobile payments, DRM, and biometric authentication. 0ddc0de gannimo Philipp https://events.ccc.de/congress/2025/hub/event/detail/not-to-be-trusted-a-fiasco-in-android-tees https://cfp.cccv.de/39c3/talk/3G3L3C/ https://cfp.cccv.de/39c3/talk/3G3L3C/feedback/ false 2025-12-27T21:45:00+01:00 21:45 01:00 Fuse 39c3-dngerouslink-a-deep-dive-into-whatsapp-0-click-exploits-on-ios-and-samsung-devices en Security Talk The spyware attack targeting WhatsApp, disclosed in August as an in-the-wild exploit, garnered significant attention. By simply knowing a victim's phone number, an attacker could launch a remote, zero-interaction attack against the WhatsApp application on Apple devices, including iPhones, iPads, and Macs. Subsequent reports indicated that WhatsApp on Samsung devices was also targeted by similar exploits. In this presentation, we will share our in-depth analysis of this attack, deconstructing the 0-click exploit chain built upon two core vulnerabilities: CVE-2025-55177 and CVE-2025-43300. We will demonstrate how attackers chained these vulnerabilities to remotely compromise WhatsApp and the underlying iOS system without any user interaction or awareness. Following our analysis, we successfully reproduced the exploit chain and constructed an effective PoC capable of simultaneously crashing the target application on iPhones, iPads, and Macs. Finally, we will present our analysis of related vulnerabilities affecting Samsung devices (such as CVE-2025-21043) and share how this investigation led us to discover additional, previously unknown 0-day vulnerabilities. In August 2025, it attracted significant attention when Apple patched CVE-2025-43300, a vulnerability reportedly exploited in-the-wild to execute "extremely sophisticated attack against specific targeted individuals”. A week later, WhatsApp issued a security advisory, revealing the fix for a critical vulnerability, CVE-2025-55177, which was also exploited in-the-wild. Strong evidence indicated that these two vulnerabilities were chained together, enabling attackers to deliver a malicious exploit via WhatsApp to steal data from a user's Apple device, all without any user interaction. To deconstruct this critical and stealthy in-the-wild 0-click exploit chain, we will detail our findings in several parts: 1. WhatsApp 0-Click Attack Vector (CVE-2025-55177). We will describe the 0-click attack surface we identified within WhatsApp. We will detail the flaws in WhatsApp's message handling logic for "linked devices," which stemmed from insufficient validation, and demonstrate how an attacker could craft malicious protocol messages to trigger the vulnerable code path. 2. iOS Image Parsing Vulnerability (CVE-2025-43300). The initial exploit allows an attacker to force the target's WhatsApp to load arbitrary web content. We will then explain how the attacker leverages this by embedding a malicious DNG image within a webpage to trigger a vulnerability in the iOS image parsing library. We will analyze how the RawCamera framework handles the parsing of DNG images, and pinpoint the resulting OOB vulnerability. 3. Rebuilding the Chain: From Vulnerability to PoC. In addition, we will then walk through our process of chaining these two vulnerabilities, constructing a functional Proof-of-Concept (PoC) that can simultaneously crash the WhatsApp application on target iPhones, iPads, and Macs. Beyond Apple: The Samsung Connection (CVE-2025-21043). Samsung's September security bulletin patched CVE-2025-21043, an out-of-bounds write vulnerability in an image parsing library reported by the Meta and WhatsApp security teams. This vulnerability was also confirmed to be exploited in-the-wild. While an official WhatsApp exploit chain for Samsung devices has not been publicly detailed, we will disclose our findings on this related attack. Finally, we will share some unexpected findings from our investigation, including the discovery of several additional, previously undisclosed 0-day vulnerabilities. Zhongrui Li Yizhe Zhuang Kira Chen https://events.ccc.de/congress/2025/hub/event/detail/dngerouslink-a-deep-dive-into-whatsapp-0-click-exploits-on-ios-and-samsung-devices https://cfp.cccv.de/39c3/talk/P9ZQZD/ Slides https://cfp.cccv.de/39c3/talk/P9ZQZD/feedback/ false 2025-12-27T23:00:00+01:00 23:00 00:40 Fuse 39c3-coding-dissent-art-technology-and-tactical-media en Art & Beauty Talk This presentation examines artistic practices that engage with sociotechnical systems through tactical interventions. The talk proposes art as a form of infrastructural critique and counter-technology. It also introduces a forthcoming HackLab designed to foster collaborative development of open-source tools addressing digital authoritarianism, surveillance capitalism, propaganda infrastructures, and ideological warfare. In this talk, media artist and curator Helena Nikonole presents her work at the intersection of art, activism, and tactical technology — including interventions into surveillance systems, wearable mesh networks for off-grid communication, and AI-generated propaganda sabotage. Featuring projects like Antiwar AI, the 868labs initiative, and the curatorial project Digital Resistance, the talk explores how art can do more than just comment on sociotechnical systems — it can interfere, infiltrate, and subvert them. This is about prototypes as politics, networked interventions as civil disobedience, and media hacks as tools of strategic refusal. The talk asks: what happens when art stops decorating crisis and starts debugging it? The talk will also introduce an upcoming HackLab initiative — a collaboration-in-progress that brings together artists, hackers, and activists to develop open-source tools for disruption, resilience, and collective agency — and invites potential collaborators to get involved. https://cfp.cccv.de/media/39c3/submissions/WDE9LR/antiwarAI_ROD5BYp.png Helena Nikonole https://events.ccc.de/congress/2025/hub/event/detail/coding-dissent-art-technology-and-tactical-media https://cfp.cccv.de/39c3/talk/WDE9LR/ https://cfp.cccv.de/39c3/talk/WDE9LR/feedback/ false 2025-12-27T23:55:00+01:00 23:55 00:40 Fuse 39c3-from-silicon-to-darude-sand-storm-breaking-famous-synthesizer-dsps en Hardware Talk Have you ever wondered how the chips and algorithms that made all those electronic music hits work? Us too! At The Usual Suspects we create open source emulations of famous music hardware, synthesizers and effect units. After releasing some emulations of devices around the Motorola 563xx DSP chip, we made further steps into reverse engineering custom silicon chips to achieve what no one has done before: a real low-level emulation of the JP-8000. This famous synthesizer featured a special "SuperSaw" oscillator algorithm, which defined an entire generation of electronic and trance music. The main obstacle was emulating the 4 custom DSP chips the device used, which ran software written with a completely undocumented instruction set. In this talk I will go through the story of how we overcame that obstacle, using a mixture of automated silicon reverse engineering, probing the chip with an Arduino, statistical analysis of the opcodes and fuzzing. Finally, I will talk about how we made the emulator run in real-time using JIT, and what we found by looking at the SuperSaw code. This talk is a sequel to my last year's talk "Proprietary silicon ICs and dubious marketing claims? Let's fight those with a microscope!", where I showed how I reverse engineered a pretty old device (1986) by looking at microscope silicon pics alone, with manual tracing and some custom tools. Back then I claimed that taking a look at a more modern device would be way more challenging, due to the increased complexity. This time, in fact, I've reverse engineered a much modern chip: the custom Roland/Toshiba TC170C140 ESP chip (1995). Completing this task required a different approach, as doing it manually would have required too much time. We used a guided automated approach that combines clever microscopy with computer vision to automatically classify standard cells in the chip, saving us most of the manual work. The biggest win though came from directly probing the chip: by exploiting test routines and sending random data to the chip we figured out how the internal registers worked, slowly giving us insights about the encoding of the chip ISA. By combining those two approaches we managed to create a bit-accurate emulator, that also is able to run in real-time using JIT. In this talk I want to cover the following topics: - What I learned since my previous talk by looking at more complicated chips - Towards automating the silicon reverse engineering process - How to find and exploit test modes to understand how stuff works - How we tricked the chips into spilling its own secrets - How the ESP chip works, compared to existing DSP chips - How the SuperSaw oscillator turned out to work giulioz https://events.ccc.de/congress/2025/hub/event/detail/from-silicon-to-darude-sand-storm-breaking-famous-synthesizer-dsps https://cfp.cccv.de/39c3/talk/D77XG8/ Slides https://cfp.cccv.de/39c3/talk/D77XG8/feedback/ false 2025-12-27T12:00:00+01:00 12:00 03:00 Am Spätverkauf 39c3-no-input de Live Performance live performance Ein geschlossener Kreislauf aus Klang und Störung. Kein Instrument, kein Ursprung, nur das Rauschen, das sich selbst gebiert. Frequenzen kratzen an der Grenze zum Bewusstsein, Feedback wird zum Atem einer Maschine ohne Körper. Aus dem Dunkel des Signals erhebt sich ein sirrendes Mantra — chaotisch, unheilig, autark. Eine Beschwörung der Leere durch elektrische Selbstzerstörung. Die Hände bewegen sich langsam, beinahe priesterlich, sie berühren das Pult wie ein Altar aus Spannung und Staub. Rauschen füllt den Raum — nicht als Geräusch, sondern als Gegenwart. Ein Chor aus toten Signalen erhebt sich, summt, flackert, wächst zu einer Welle, die den Atem der Anwesenden verschluckt. https://cfp.cccv.de/media/39c3-call-for-punk/submissions/SSVAZA/1BEBBB17-4978-4563-9079-4_4FniVdc.webp CooperfrauMelissengeist https://events.ccc.de/congress/2025/hub/event/detail/no-input Bandcamp: Cooperfrau Melissengeist Instagram: Cooperfrau Melissengeist https://cfp.cccv.de/39c3-call-for-punk/talk/SSVAZA/ Cooperfrau Melissengeist Logo true 2025-12-27T15:00:00+01:00 15:00 00:15 Am Spätverkauf 39c3-wald-statt-repression-die-kreativitat-von-staat-un de Antifa Lightning Talk Die Bauindustrie versteht sich auf der ganzen Herstellungs- und Lieferkette gut in der Umweltzerstörung und in der Verdrängung von Menschen für den Profit. Aber auch im Niderschlagen von Protesten und Widerständen ist sie bereits geübt. Vor bald 3 Jahren wurde in der Schweiz ein wertvoller Wald besetzt. Die Menschen stellten sich damit gegen die Rodung des Waldes für eine Bauschuttdeponie und den Abrisswahn, sowie der damit verbundenen Gentrifizierung in der angrenzenden Stadt. Die Waldbesetzung und deren Zielen fand in breiten Kreisen Sympathien. Auf diese Blossstellung von Staat und Kapital, mussten diese sofort ihre Autorität an sich reissen. Da das Strafgesetz jedoch nur bedingt brauchbar war dafür, wurden sie kreativ nutzten auf der einen Seite das klassistische Justizsystem und auf der anderen Seite höhlten sie demokratische Institutionen weiter aus. WSR https://events.ccc.de/congress/2025/hub/event/detail/wald-statt-repression-die-kreativitat-von-staat-un https://cfp.cccv.de/39c3-call-for-punk/talk/ZQ9WVE/ true 2025-12-27T15:20:00+01:00 15:20 00:15 Am Spätverkauf 39c3-zwischen-brandanschlagen-und-platzbesetzungen-eine de Antifa Lightning Talk Anfang der 90er brennen in der Schweiz die Asylheime. Nicht Rostock oder Hoyerswerda, sondern auch Chur, Lotzwil und Konolfingen bei Bern. Das ist die oft vergessene Welle rechtsextremen Terrors mitten in der Schweiz. Rechtsextreme Skinheadgruppen, später Blood & Honour- und Hammerskins-Strukturen, traten offen auf, organisierten Konzerte, patrouillierten in Gruppen durch Städte und agierten äusserst brutal. Die staatliche Reaktion blieb lange verhalten – Bagatellisierung, Wegschauen, fehlende Ermittlungen. Antifaschistische Organisation und Selbstschutz wurden damit zur Notwendigkeit. Parallel dazu entwickelte sich in Bern eine kraftvolle antirassistische Bewegung, die weit über Szenepolitik hinausging. Während rechts motivierte Gewalt zunahm und Asylgesetzverschärfungen politische Mehrheiten fanden, begann ein breiter gesellschaftlicher Widerstand, getragen von migrantischen Communities, Gewerkschaften und linken Gruppen. In dieser Zeit fanden grosse Demonstrationen für die Antirassismusstrafnorm statt – ein Gesetz, das damals hart umkämpft war und dessen Annahme erst durch massiven öffentlichen Druck möglich wurde. Gleichzeitig entstand eine breite Sans-Papiers-Bewegung: Platzbesetzungen, Kirchenasyle, Streiks, «Papierlose Restaurants» und lokale Netzwerke machten sichtbar, dass Tausende Menschen ohne geregelten Status in der Schweiz leben und arbeiten. Die Kämpfe dieser Jahre zeigen deutlich, dass antifaschistische und antirassistische Arbeit nicht getrennt voneinander existierten: Sie waren eine gemeinsame Antwort auf rechte Gewalt, und staatliche Ignoranz. gabel https://events.ccc.de/congress/2025/hub/event/detail/zwischen-brandanschlagen-und-platzbesetzungen-eine https://cfp.cccv.de/39c3-call-for-punk/talk/N7K8KG/ true 2025-12-27T15:45:00+01:00 15:45 00:15 Am Spätverkauf 39c3-antifa-will-win de Antifa Lightning Talk Die Antifa™ kann auf eine bewegte Geschichte zurückblicken - also machen wir das doch mal. Wir bringen ein kleines Best-Of der jüngeren Bewegungsgeschichte mit und zeigen Bilder von und Einblicke in Momente, an denen uns klar wurde: Antifa will win! Nach gut 100 Jahren antifaschistischer Arbeit ist es Zeit, die schönen und erfolgreichen Augenblicke zu feiern. Dieser Talk soll Mut machen, sich den faschistischen Kräften in den Weg zu stellen: Wo andere wegschauen und weitergehen, Platz zu nehmen. Gemeinsam solidarische Bündnisse gegen Rechts zu schmieden, wenn andere ausschließen und hetzen. Wo andere mauern, Seebrücken zu bauen. Wenn andere spalten, unteilbar zu bleiben. Und sich zu widersetzen, wenn andere mitmachen. So lange, bis alle Städte Nazifrei sind und es auch kein ruhiges Hinterland mehr gibt. Alerta! Es gibt frische Eindrücke von den [#widersetzen](https://events.ccc.de/congress/2025/hub/tag/widersetzen) Aktionen in Gießen, wo wir mit 15.000 Menschen die Gründung des AfD Jugendverbands blockiert haben! Als Interventionistische Linke haben wir seit zwei Jahrzehnten Erfahrungen mit antifaschistischer Handarbeit gesammelt und freuen uns, davon zu erzählen. Außerdem haben wir unsere Broschüre "[Antifa Will Win! - Alles eine Frage der Organisierung](https://interventionistische-linke.org/antifa-will-win)" im Gepäck - für alle, die Lust (bekommen) haben, sich antifaschistisch zu organisieren. https://cfp.cccv.de/media/39c3-call-for-punk/submissions/N7BA7Y/Sharepic_01_pBdrUwV_4Rp6U_g3utNFp.webp Paul Daniel https://events.ccc.de/congress/2025/hub/event/detail/antifa-will-win https://cfp.cccv.de/39c3-call-for-punk/talk/N7BA7Y/ true 2025-12-27T19:00:00+01:00 19:00 00:30 Am Spätverkauf 39c3-tippeln-am-rande-des-abgrunds de Live Performance live performance Das "tipple radio" ist eine Collage von Singer-Songwriter-Konzert und szenischer Lesung. Es trägt gecoverte und selbstgeschriebene Songs und Medleys von Punk über Hamburger Schule bis Schlager mit Gitarre und Gesang vor und verknüpft die Inhalte der Songs miteinander. Es entsteht ein Geflecht von Musik und Text, dass Aufbrüche in Abgründen aufzeigt und Hoffnung macht sich gegen die Faschisierung in der Gesellschaft zusammen zu schließen. https://cfp.cccv.de/media/39c3-call-for-punk/submissions/U7HLWW/tipple-radio_Mwirylc_yaum_IR9eiBL.webp tippel radio https://events.ccc.de/congress/2025/hub/event/detail/tippeln-am-rande-des-abgrunds https://cfp.cccv.de/39c3-call-for-punk/talk/U7HLWW/ true 2025-12-27T21:00:00+01:00 21:00 01:00 Am Spätverkauf 39c3-stormoment en DJ-Set DJ Set All styles Punk from hc, grunge and garage to indie, pop and post, female fronted only. You can look at the state of society and be scared. It's fair to be scared, it's fair to feel pessimism. But. Listen to Punk music. Punk's hopeful. Punk is never pretending that things are great. But the message, the verve, the rythm and everything behind punk music is: Fuck this, fight back! Here's a mix with some bands I like: https://soundcloud.com/klingtjut/stoer Vale https://events.ccc.de/congress/2025/hub/event/detail/stormoment https://cfp.cccv.de/39c3-call-for-punk/talk/DCJTXB/ true 2025-12-27T22:00:00+01:00 22:00 00:30 Am Spätverkauf 39c3-mittagspausenpunk-live de Live Performance live performance Einschiss ist DER Ausnahmekünstler zwischen den Stationen Paracelsus Bad und Rathaus Reinickendorf der U8. Gefangen im Körper eines Mannes mit Charaktermodell German_default_3_bearded.obj macht Einschiss Musik gegen die Dinge die nerven: Nazis, Arbeit und Consent Forms (und Arbeit). Dabei setzt er modernste Technologien ein, um einen Typen so klingen zu lassen, als wäre es ein Typ mit Backing Track. Für mehr Musiker:innen hat das Bier nicht gereicht. Sorry. Was kann man noch über Einschiss sagen, was nicht schon alle gesagt haben? Diese Einmannpunkband hat mehrere Hörer:innen erreicht, indem er ihnen Fußbilder versprochen hat. Dieser kluge PR-Schachzug hat eine bis heute treue Fanbase gezwungen, jede der beiden EPs zu klauen. Einschiss macht Musik für die einfach gestrickten Leute, die am Montagmorgen denken: Scheisse, gar keinen Bock auf Nazis. Das Live Set ist eine Tour de Force durch die seltener gespielten C- und D-Seiten auf einer vielsaitigen Gitarre mit teils unterschiedlichen aber immer häufiger auch eingängigen Texten zum Mitgrölen und Heiratsanträge machen. Das gute ist: selbst wenn es schlecht wird, dauert es nur 30 minuten. Eine Bahnfahrt macht da länger schlechte Laune. https://cfp.cccv.de/media/39c3-call-for-punk/submissions/TMLRVT/Bocklose_Kunst_Cover_8o38_mIeQC4h.webp Einschiss https://events.ccc.de/congress/2025/hub/event/detail/mittagspausenpunk-live https://cfp.cccv.de/39c3-call-for-punk/talk/TMLRVT/ true 2025-12-27T23:00:00+01:00 23:00 00:30 Am Spätverkauf 39c3-gepflegtes-grolen-am-spati-antifa-jodler-punkrock- de Live Performance live performance Das Konzept ist simpel: Wir singen zusammen. Im Angebot haben wir vier Kategorien: Politische Classics, Punkrock-Hymnen, Antifaschistische Jodler und Umverteilungs-Hits des Quartiersmanagements Grunewald in der ansprechenden Karaoke-Variante. Man muss nichts können. Mit charmanter Anleitung manövrieren wir uns zusammen durch kollektive Dissonanzen! Einfach mal gepflegt einen raushauen! Was gibt es besinnlicheres, als dreistimmig "Scheiß AFD" zu singen und danach mit einem herzhaften "Rabimmel, Rabammel Oi! Oi! Oi!" die Harmonien zu zerdeppen. Die Sektion Schalala der hedonistischen Internationale organisiert seit einem Jahr monatlich Sing-Kundgebungen in Berlin und singt auf der Straße und überall, wo es sonst noch so passt - wie eben auf dem 39C3. Songtexte bringen wir mit. https://cfp.cccv.de/media/39c3-call-for-punk/submissions/APCEU8/tl39c3_VNGX4r2_3QHVDXO_MN_LN4T7oe.webp elenos https://events.ccc.de/congress/2025/hub/event/detail/gepflegtes-grolen-am-spati-antifa-jodler-punkrock- https://cfp.cccv.de/39c3-call-for-punk/talk/APCEU8/ true 2025-12-27T18:00:00+01:00 18:00 00:59 Chaos Computer Music Club 39c3-syncing-visuals-and-stage-lights-against-the-beat- en Talk Most clubs and concerts have predefined light and visuals, and often they are generic and not synced to the beat of the music. Today we will show you that it's actually possible to sync visual effects to the beat of live music recorded from the microphone, and it's pretty easy! Aimed at beginners. We will teach people how to set up and use TouchDesigner to perform audio analysis and how to draw basic effects and light shows that respond to the beat of the input audio. If you want to follow along, please come with TouchDesigner preinstalled (the free version is perfectly fine). Recommended on Windows or Mac, but with enough pain it can run under Wine as well. Luca Di Bartolomeo (cyanpencil) https://events.ccc.de/congress/2025/hub/event/detail/syncing-visuals-and-stage-lights-against-the-beat- https://cfp.cccv.de/39c3-chaos-computer-music-club/talk/8LG39N/ true 2025-12-27T19:00:00+01:00 19:00 02:00 Chaos Computer Music Club 39c3-katja-ruge en DJ-Set DJ Set „Planetary Visions“ with Katja Ruge (Can Love Be Synth/Synthesizerstudio HH, Electric Lights/Planetarium HH) Katja Ruge’s DJ sets are a seamless fusion of Italo, New Wave, Cosmic Sounds, 80s, Dark Disco, and Electro. Katja Ruge’s DJ sets are a seamless fusion of Italo, New Wave, Cosmic Sounds, 80s, Dark Disco, and Electro. With deep musical knowledge and an intuitive sense of the crowd, she effortlessly adapts to both club environments and more intimate settings. She has played at renowned venues such as Golden Pudel Club, Else Berlin, Südpol, U&G, as well as various events, gallery openings, and private parties. End of 2023, Katja launched the DJ & live set series “Electric Lights – Women in Electronic Music” at Planetarium Hamburg. Her first guests included Helena Hauff and DJ MELL G. The event’s Berlin premiere at Zeiss-Großplanetarium was a double sell-out in February 2025, featuring a live performance by JakoJako. https://www.katjaruge.de/music https://on.soundcloud.com/wBwr2Idellv6QTvJwV https://cfp.cccv.de/media/39c3-chaos-computer-music-club/submissions/78Y9EN/Katja_Ruge_fY_YwNzWFt.webp Katja Ruge https://events.ccc.de/congress/2025/hub/event/detail/katja-ruge https://cfp.cccv.de/39c3-chaos-computer-music-club/talk/78Y9EN/ true 2025-12-27T21:00:00+01:00 21:00 02:00 Chaos Computer Music Club 39c3-analog-to-algorithm-rss-discos-underground-journey en DJ-Set DJ Set From crackling Kraut and Disco records to hyper produced Techno tracks - dance music has come a long way in the last six decades, and was always strongly influenced by evolving technology. Dance music’s history is a feedback system between culture and circuitry. Each new invention—from the disco subwoofer to today’s neural-driven mastering tools—reshapes sound itself. RSS Disco’s timeline approach celebrates this continuum: a story of machines learning to groove, and humans learning to listen differently through them. From crackling Kraut and Disco records to hyper produced Techno tracks - dance music has come a long way in the last six decades, and was always strongly influenced by evolving technology. Dance music’s history is a feedback system between culture and circuitry. Each new invention—from the disco subwoofer to today’s neural-driven mastering tools—reshapes sound itself. RSS Disco’s timeline approach celebrates this continuum: a story of machines learning to groove, and humans learning to listen differently through them. We take you on a trip through music history in a two hour DJ-set. Starting with music from the early 1970s and closing with tracks produced in 2025. Have a dance with us and get a feeling for the changing sound aesthetics, style and fashion the over the decades. Not a lot of time to cover the sheer endless amount of music and information, you say? You are right! This can only be a tiny extract, filtered through our perspective and taste. We’ll focus on a selection that feels representative for its time - exciting, beautiful, obscure or interesting. And of course some dirty bangers. To make the set not only danceable but also offer hungry brains visual context, we provide a live timeline with info about the decade's musical developments, technical breakthroughs/curiosities and fun facts. https://cfp.cccv.de/media/39c3-chaos-computer-music-club/submissions/9QTF7D/RSS_Disco_2022_tQJQJOe.jpg RSS Disco https://events.ccc.de/congress/2025/hub/event/detail/analog-to-algorithm-rss-discos-underground-journey https://cfp.cccv.de/39c3-chaos-computer-music-club/talk/9QTF7D/ true 2025-12-27T23:00:00+01:00 23:00 02:00 Chaos Computer Music Club 39c3-steve-simon de DJ-Set DJ Set Als Part der ToxicFamily, die seit mittlerweile 25 Jahren Label, elektronisches Magazin, Veranstalter und einfach eine Institution in Frankfurt ist, fördert Steve, der übrigens einer der dienstältesten Residents des Tanzhaus West in Frankfurt ist, aktiv die Frankfurter Underground Clubszene und vor allem den Nachwuchs. Ob es ein Gig bei der Toxic Family Radio Show im lokalen FM Radio ist, ein CDJ Lehrgang oder einfach nur aufmunterte Worte während eines Sets - viele Frankfurter DJs haben eine Geschichte über Steve zu erzählen. Wenn Steve House Musik spielt, sieht man oft DJ Kollegen mit gespitzen Ohren an der Bar stehen - oder auch mal mitten auf der Tanzfläche - weil das Barpersonal selbst auf der Theke tanzt. Als ein bescheidener, introvertierter und klaustrophobischer Misanthrop und Glatzenträger meidet Steve das Rampenlicht. Deswegen steht er in einem Nachtclub gern in der dunklen Ecke, verbarrikadiert hinter Technik. Eigentlich war es sein großer Traum, als Teil des ostkasachstanischen Staatsballett mit einer neopostbarockmodernen Aufführung von Schwanensee um die Welt zu touren. Da er aber die erforderliche Mindestgröße für neopostbarockanische, ostkasachstanische Staatsballett-Tänzer unterschreitet, schwache Sprunggelenke hat und außerdem nie tanzt, wird dieser wohl nie in Erfüllung gehen. Ausgebildet als Vodka-Vernichtungsexperte weiss er, dass die Bar das wichtigste Element eines Clubs ist. Er ist ausserdem seit seinem 22. Lebensjahr ein erfolgreicher Leser und kann seit kurzem 6 der 8 in seinem Namen enthaltenen Buchstaben aufmalen. Wenn man ihm Zeit lässt. Aber Autogramme geben muss er ja eh nicht. Wie im Hitchhikers Guide empfohlen, den er übrigens auch fast ganz allein durchgelesen hat, hat er immer sein Schmuse-Handtuch dabei. Achja … und er spielt einfach grandiose House-Musik. https://cfp.cccv.de/media/39c3-chaos-computer-music-club/submissions/R3JU9U/steve_1JyyQRC.jpg Steve https://events.ccc.de/congress/2025/hub/event/detail/steve-simon https://cfp.cccv.de/39c3-chaos-computer-music-club/talk/R3JU9U/ true 2025-12-28T01:00:00+01:00 01:00 01:00 Chaos Computer Music Club 39c3-gaylienz en Live Performance live performance Gaylienz is the new project of 3 gayliens coming from various universes. They got united to bring us an audio-visual glitch rave experience where we surf with an alien cats thru chaos and love cosmos. The audience is invited to participate too and of course to dance. Expect acid basslines, circuit bent, gayboy noise, beat constructions and analog glitch and videogame visuals - by Yelo555, Oliotronix and Maria Mam. https://www.instagram.com/gali3nz/ https://www.instagram.com/yelough.strobez/ 3 pilots controlling the spaceship of various audio-visual machines. https://cfp.cccv.de/media/39c3-chaos-computer-music-club/submissions/YEUACK/gaYlienz010100_SWPgAZi.png Oliotronix https://events.ccc.de/congress/2025/hub/event/detail/gaylienz https://cfp.cccv.de/39c3-chaos-computer-music-club/talk/YEUACK/ true 2025-12-28T02:00:00+01:00 02:00 02:00 Chaos Computer Music Club 39c3-angie-taylor en DJ-Set DJ Set Angie Taylor is specialized in Hybrid Techno LIVE-DJ SETS, often blending it with live bass guitar and vocals to create a unique, electrifying hybrid Techno experience. Angie Taylor, a fierce German import, brings her unique style, intense techno, and boundless energy to clubs and festivals worldwide! This is Fresh, Straightforward Techno delivered by a charismatic artist who’s on fire with her passion for high-quality sound. Her hybrid DJ/LIVESHOW is pure energy: a powerful mix of driving beats, live bass guitar, and unique vocal performance. STYLE Techno Straight Forward. CREDITS Street Parade Zürich, ADE Amsterdam, Ultra Music Week., Miami, Modular festival Switzerland, Shows together with Jeff Mills, Fusion Festival Lärz, Pan-Pot Night at Loft Ludwigshafen, Sziget Festival, Ipse and About Blank Berlin, Touring in Saudi Arabia for a cultural exchange in the underground scene bringing German techno to Jeddah and Riyadh while featuring female artists. Official artist for Xone DJ/Allen & Heath. https://cfp.cccv.de/media/39c3-chaos-computer-music-club/submissions/RZAQED/Press_AngieTay_EMsJ4EU.jpg Angie Taylor https://events.ccc.de/congress/2025/hub/event/detail/angie-taylor https://cfp.cccv.de/39c3-chaos-computer-music-club/talk/RZAQED/ true 2025-12-28T04:00:00+01:00 04:00 02:00 Chaos Computer Music Club 39c3-ymna en DJ-Set DJ Set Heute Nacht wird der Dancefloor zur globalen Schnittstelle. YMNA kalibriert mit ihrem Mix aus global inspirierten Soundscapes und moderner Club-Musik unsere Sinne neu. Es ist die perfekte Balance zwischen dem Rohen, Ursprünglichen und der polierten Kraft des heutigen melodischen Techno. Hallo ihr Lieben, ganz aufgeregt sende ich euch den Link zu meinem Set: https://soundcloud.com/ymna_music Ich hoffe euch gefällt mein Mix aus globalen Sounds und elektronischer Tanzmusik. Liebe Grüße Nina (art&play) Nina_art&play https://events.ccc.de/congress/2025/hub/event/detail/ymna https://cfp.cccv.de/39c3-chaos-computer-music-club/talk/GE7RNY/ true 2025-12-27T12:30:00+01:00 12:30 02:30 Chill Floor 39c3-festnacht de DJ-Set DJ Set Festnacht is a fixture in Hamburg’s music scene. Together with L.F.T., he has steered the Neoprimitive label and event series for nearly a decade, releasing a broad range of mostly experimental electronic music from artists like Rosaceae, Children of Leir, and Alobhe, and inviting names such as Skee Mask, Anthony Rother, Bloody Mary, and Interstellar Funk to the iconic Golden Pudel Club. His DJ sets span the spectrum of Detroit-rooted techno and electro - always unpredictable, shaped by the night’s energy, and known for his skill in slowly and subtly warming up a room. https://cfp.cccv.de/media/39c3-chaos-computer-music-club/submissions/NMZCPN/image0_znR38c2.jpeg Festnacht https://events.ccc.de/congress/2025/hub/event/detail/festnacht https://cfp.cccv.de/39c3-chaos-computer-music-club/talk/NMZCPN/ true 2025-12-27T15:00:00+01:00 15:00 02:30 Chill Floor 39c3-bushfya de DJ-Set DJ Set For the Love of Music. Nothing else. bushfya https://events.ccc.de/congress/2025/hub/event/detail/bushfya https://cfp.cccv.de/39c3-chaos-computer-music-club/talk/MUHPC3/ true 2025-12-27T17:30:00+01:00 17:30 02:30 Chill Floor 39c3-afidissima-alice de DJ-Set DJ Set Afidissima and Alice, two millennial stereotypes sharing music tips as emotional currency. Gabby radio host Afidissima delivers genre-chaotic sets drenched in dubby vibes and oozing with groove. A relentless cratedigger with questionable priorities. Alice unites musical moments and moods that refuse to be united. Seductive, whimsical, followed by familiar paths, so as not to upset the ear and inner balance. Mixed feelings becoming multiple emotions. Everything as usual – just enhanced momentum. https://cfp.cccv.de/media/39c3-chaos-computer-music-club/submissions/HCH8XG/Afidissima__A_OKRtD9V.jpg Afidissima & Alice https://events.ccc.de/congress/2025/hub/event/detail/afidissima-alice https://cfp.cccv.de/39c3-chaos-computer-music-club/talk/HCH8XG/ true 2025-12-27T20:00:00+01:00 20:00 01:00 Chill Floor 39c3-the-uncontrolled-manifold-dancing-with-sympoetic-m de Live Performance live performance The Uncontrolled Manifold works with electronics and machines that possess autonomy and obstinacy. These machines are brought into interaction with each other, creating danceable polyrhythms and, at the same time, a fascinating shadow play, because the machines are mounted on an overhead projector and their interaction is projected. Analog oscillators generate self-organizing coordination dynamics and organic patterns, while motors strike rubber strings producing deep, resonant bass sounds reminiscent of shamanic drumming. Supported by the visuals spectators may feel like being dragged into the vortex of a living clock, compelled to join the performance through movement and dance. https://cfp.cccv.de/media/39c3-chaos-computer-music-club/submissions/WFN3YL/ucm_s_OFhcyxn_C5E0M1B.jpg Christian Faubel https://events.ccc.de/congress/2025/hub/event/detail/the-uncontrolled-manifold-dancing-with-sympoetic-m https://cfp.cccv.de/39c3-chaos-computer-music-club/talk/WFN3YL/ true 2025-12-27T21:00:00+01:00 21:00 02:30 Chill Floor 39c3-barbnerdy en DJ-Set DJ Set Sharing Means Caring: Most of the music of this series was recorded at a Chaos Event in the last 10 (or more) years. It is time for a new episode: https://soundcloud.com/barbnerdy/sets/mixtape-sharing-means-caring-1 Sharing Means Caring: Most of the music of this series was recorded at a Chaos Event in the last 10 (or more) years. It is time for a new episode: https://soundcloud.com/barbnerdy/sets/mixtape-sharing-means-caring-1 BarbNerdy https://events.ccc.de/congress/2025/hub/event/detail/barbnerdy https://cfp.cccv.de/39c3-chaos-computer-music-club/talk/7SWGNH/ true 2025-12-27T23:30:00+01:00 23:30 03:00 Chill Floor 39c3-dj-sloush-zarrt de DJ-Set DJ Set The berlin based artist duo is working under different alias solo, in duos or collectives since 2011. They are sound artists, DJs, part of Cashmere Radio (Berlin), curators, event organizers, performers and multimedia artists. “Dj Sloush aka Spitz + Zarrt aka Fellmaus will make you happy. There’s gonna be these sounds coming from the speakers, new otherworldly ones mixed with seemingly familiar yet undiscovered natural feeling waves of moods, or maybe hot and twirling rapid fire bass jumping trippin balls ones. Either way they’ll provide you with a guaranteed enjoyment of the infinite kind.” https://cfp.cccv.de/media/39c3-chaos-computer-music-club/submissions/7TUUQ9/Bildschirmfoto_RK14Zdj.png Dj Sloush aka Spitz + Zarrt https://events.ccc.de/congress/2025/hub/event/detail/dj-sloush-zarrt https://cfp.cccv.de/39c3-chaos-computer-music-club/talk/7TUUQ9/ true 2025-12-28T02:30:00+01:00 02:30 02:00 Chill Floor 39c3-babooshka de DJ-Set DJ Set Babooshka is Marian Bodenstein, who played with several punk bands such as LASSIE, LAFFF BOX, NICK NORMAL and DBR at the moment. Under the moniker FUZZZGUN Marian is working as a graphic designer for bands, labels and other "multinational corporations". Normally Babooshka would serve you a high octane dance set rooted in 70s power pop, punk and rocknroll but for the CCCChillfloor you’ll get a certain mixture of their favorite relaxin, beautiful and tearjerking tracks, combined with some broken records to serve as analog loops and audioplay records. Babooshka is happy to play records that are normally reserved for the end of an emotional night of dance and shenanigans or even never would see the lights of the dance floor under „normal“ circumstances. https://cfp.cccv.de/media/39c3-chaos-computer-music-club/submissions/K9EB3H/photo_2025-12_vzJXn3D.jpeg Babooshka https://events.ccc.de/congress/2025/hub/event/detail/babooshka https://cfp.cccv.de/39c3-chaos-computer-music-club/talk/K9EB3H/ true 2025-12-28T04:30:00+01:00 04:30 02:30 Chill Floor 39c3-g00d-news de DJ-Set DJ Set g00d news lebt und arbeitet seit 2009 in Hamburg und ist als Vinyl-DJ Teil der lokalen Underground-Szene. Er war langjähriger Resident und Kurator im Golden Pudel Club und ist Mitbetreiber des Plattenladens Remoto-Rec. sowie des Vinyl- und Kassettenlabels V I S mit Fokus auf experimenteller Musik. Seine Sets reichen von Ambient, Experimental und outernationalen Sounds bis hin zu UK-Rave, Darkside Jungle, Hardcore, Breakbeats, Deep Techno und Freetekno. Zudem ist er kuratorisch und organisatorisch im BEEK e.V. aktiv. https://cfp.cccv.de/media/39c3-chaos-computer-music-club/submissions/TMDAVN/G00dNews_pic_lxeTLuW.jpg g00d news https://events.ccc.de/congress/2025/hub/event/detail/g00d-news https://cfp.cccv.de/39c3-chaos-computer-music-club/talk/TMDAVN/ true 2025-12-27T18:00:00+01:00 18:00 02:00 Vorglühmarkt 39c3-stornoline de DJ-Set DJ Set service for dance trips ⏰✨💫⏰✨💫⏰✨💫⏰✨💫 zocke für euch housy rave essentials mit nostalgischen vocals und acid lines & mache sachen bei @diskobabel 💕 und @entropiefestival ⚡️ ... find me here (: https://soundcloud.com/stornoline https://cfp.cccv.de/media/39c3-chaos-computer-music-club/submissions/CJ3DTJ/new_pic2_Crpn_xw36XK7.webp Sassi https://events.ccc.de/congress/2025/hub/event/detail/stornoline https://cfp.cccv.de/39c3-chaos-computer-music-club/talk/CJ3DTJ/ true 2025-12-27T20:00:00+01:00 20:00 02:30 Vorglühmarkt 39c3-aladdin de DJ-Set DJ Set Hamdi (Berlin) House and minimal techno built for immersion. Extended mixes, controlled pacing, and Fog-filled rooms where the story unfolds gradually. https://cfp.cccv.de/media/39c3-chaos-computer-music-club/submissions/DXNFZW/IMG_6722_3nSF_1UKmbZV.webp Hamdi https://events.ccc.de/congress/2025/hub/event/detail/aladdin https://cfp.cccv.de/39c3-chaos-computer-music-club/talk/DXNFZW/ true 2025-12-27T14:00:00+01:00 14:00 00:50 SoS Stage H 39c3-c3gelb-hygieneschulung-nach-43-ifsg-frikadellendip de, en other Hygiene Training according to § 43 IfSG (German Infection Protection Act) We are again conducting hygiene training sessions — the "Meatball Diploma", as it's called in German slang — for everyone involved in food preparation for others. The goal is to raise awareness of a hygienic environment surrounding the preparation and serving of food at 39C3 and, consequently, to contribute to a higher level of healthiness of us all. Ideally, this training is preceeded initially by an instruction by the relevant public health department (Gesundheitsamt). Even better, of course, is if you have already attended "follow-up training", for example, at 38C3 or CCCCamp. If you have any relevant documents, please bring them along so we can update, stamp, and sign your proof of training. :-) Of course, we also welcome everyone who is joining us for the first time without prior training from the public health department and/or without any prior knowledge of food hygiene at all. We look forward to seeing you! - Be excellent to each other :-) Team C3GELB (DECT 4352) m4rtin https://events.ccc.de/congress/2025/hub/event/detail/c3gelb-hygieneschulung-nach-43-ifsg-frikadellendip true 2025-12-27T15:00:00+01:00 15:00 00:25 SoS Stage H 39c3-freifunk-zum-anfassen-und-router-zum-mitnehmen de other Freifunk, was soll das? Ich soll mein Internet mit anderen teilen, wozu das denn? Wie geht das überhaupt? Wer braucht heutztage noch WLAN von anderen Leuten wenn doch eh alle Mobilfunkflatrates haben? All diese Fragen und weitere beantworten wir dir und haben sogar direkt noch freifunkfähige Router dabei, bei denen wir euch gern helfen diese für Freifunk einzurichten. Damit könnt ihr daheim direkt mitmachen. skorpy (she/her) https://events.ccc.de/congress/2025/hub/event/detail/freifunk-zum-anfassen-und-router-zum-mitnehmen true 2025-12-27T17:30:00+01:00 17:30 00:25 SoS Stage H 39c3-foundation-workshop-hands-on-how-does-the-internet en other This workshop is for all who do not know at all or only have a vague idea what an “IP address” is. We’ll learn how the Internet works by making Internet traffic visible. This is a beginner’s workshop. If you toyed with Wireshark before, you will be bored to hell in this workshop. Invisible to the casual user, lots of computers communicate and work together to deliver the kitten videos you’re craving. In this workshop, we use the tool Wireshark (available for all operating systems) to make this communication visible. In lots of life demos, we’ll learn that the domain names we’re familiar with, like ccc.de or fridaysforfuture.de, are a thin layer around IP addresses, which are the real addresses computers use to identify themselves. We’ll uncover which hidden information your browser sends along each request, and we’ll see how easy it is to intercept traffic. This workshop is for everybody who is interested in knowing how the Internet works, in which form computers talk to each other. Absolutely no prerequisites are required. People who are familiar with network stacks will be bored to hell. Note to the infrastructure team: In the final part of the talk, we’ll perform a standard ARP spoofing attack to intercept traffic from a volunteer and display their website login password on the projector. Of course we won’t use the congress network for this. I’ll use an hotspot of my own. **[Transcript](https://chaos.quasicoherent.io/)** IngoBlechschmidt https://events.ccc.de/congress/2025/hub/event/detail/foundation-workshop-hands-on-how-does-the-internet true 2025-12-27T18:00:00+01:00 18:00 00:25 SoS Stage H 39c3-debanking-und-die-folgen-fur-die-rote-hilfe-ev de other Der Roten Hilfe wurden die Konten gekündigt. Was passiert ist, wie wir darauf reagieren und was IHR jetzt tun könnt erfahrt ihr hier und heute. Die Rote Hilfe hat, wie viele weitere linke Organisationen in den letzten Wochen auch, ihre Konten verloren. Politische Entscheidung der Trump-Administration führten dazu. Über das SWIFT-System kann die USA auch hierzulande bestimmen, wer ein Konto erhält, wer nicht und wessen Bankverbindung einseitig gekündigt werden muss. . Wir geben einen Überblick was warum bisher passiert ist, was die Folgen für uns sind, wie wir reagiert haben, wie es weiter geht und was IHR jetzt tun könnt. Pressemitteilung: https://rote-hilfe.de/meldungen/kontokuendigung-wegen-antifa-banken-vollstrecken-us-politik-deutschland https://events.ccc.de/congress/2025/hub/https://usercontent.events.ccc.de/congress/2025/hub/usercontent/e/3e1750a81731/Bildschirmfoto_2025-12-25_um_12.16.13.png RoteHilfe https://events.ccc.de/congress/2025/hub/event/detail/debanking-und-die-folgen-fur-die-rote-hilfe-ev true 2025-12-27T18:30:00+01:00 18:30 00:25 SoS Stage H 39c3-how other Based on last year's session "How to thrive in Chaos", Part II will be about the topics, data and open questions we did not discuss last time. (https://events.ccc.de/congress/2024/hub/de/event/how-to-thrive-in-chaos-discussion-round-about-chal/) **Last year's announcement text:** ADHD is becoming increasingly visible in society and research, with many individuals receiving late diagnoses, especially women with ADHD. While there has been progress at universities, including the formation of student groups for neurodiverse individuals, there remains a lack of visibility for neurodiverse researchers. This discussion round aims to provide a safe space for everyone - whether they have an ADHD diagnosis or not - to discuss the challenges and benefits of working as a neurodiverse researcher. You are welcome to share your experiences and strategies to manage the chaos, but no one will be forced to. Moderation: Sarah, who received her ADHD diagnosis in 2023, works as a data scientist since May 2024. She will share her experiences and strategies as a woman in science with ADHD, in order to increase the awareness and provide (hopefully) helpful insights. Target audience: - Neurodiverse individuals (with or without a diagnosis) - Researchers collaborating with neurodiverse colleagues - Anyone interested in learning about the needs and challenges of individuals diagnosed with ADHD Other neurodiverse individuals are also warmly invited to join the discussion and share their knowledge. However, due to Sarah's own diagnosis, she will primarily address ADHD related topics, as she can only talk about her own experiences sarah31415 https://events.ccc.de/congress/2025/hub/event/detail/how true 2025-12-27T20:30:00+01:00 20:30 00:50 SoS Stage H 39c3-prafiguration de, en other A session on prefiguration. As a term. As a concept. As a theory. As a practice. As an attitude. As an emotional mode of life. As a method. I will tell you about my current activist-research activities and then we can get into discussions about it. What does prefiguration mean? A few approaches: ...'a transformative political instrument, [...] [which] aims to establish social relationships, practices and institutions in the here and now that are intended to represent a glimpse of the desired society – among other things, in order to generate motivational effects through exemplarity and to test and practise post-transformative subjectivity." (Sörensen 2023, p. 14), from Sörensen, P. (2023). Prefiguration: On the political nature of transformative practice. Campus. ...“the deliberative experimental implementation of desired future social relations and practices in the here-and-now” (Raekstad & Gradin 2020, p. 10), from Raekstad, P. & Gradin, S. (2020). Prefigurative Politics: Building Tomorrow Today. Polity Press. ...‘the concept of prefigurations simply refers to the search for ways of anticipating an egalitarian, horizontal society [...] a shared existence in solidarity with living beings without mutual oppression and exploitation’ (Starodub 2025, p. 8), from Starodub, A. (2025). Future Without Borders: History of Ideas and the Present State of Border Demarcation. edition assemblage. ...'anarchist organizations generally prefigured the future anarchist society in two ways. First, by embodying the kinds of organizational structure and methods of deliberation and decision-making that a future society would contain. Second, by performing the kinds of functions that organizations in a future society will carry out. [...] which was not original or exclusive to the anarchist movement.' (Baker 2023, S. 122-123), aus Baker, Z. (2023). Means and Ends: The Revolutionary Practice of Anarchism in Europe and The United States. ak press. Translated with DeepL.com (free version) Tomate_aka_Radikale_Liebe https://events.ccc.de/congress/2025/hub/event/detail/prafiguration true 2025-12-27T21:30:00+01:00 21:30 00:25 SoS Stage H 39c3-marching-ar-kita-political-art-presentation en other For two years now, children in the public education system of the russian federation are subjected to an unthinkable scale of militaristic indoctrination. Every child takes part in around 70 war-related holidays per year. The more talented ones are involved into propaganda activities to such degree that they have practically no time to study. In this SoS we won't like just to point out that millions of children are being militarized at an unthinkable scale. We also would like to speculate a bit on how and why it is possible that many of you still probably do not know about it. --- To draw attention to the above-mentioned topic, there will be also a video installation parallel take place at the monument "Kriegsklotz” not so far from the CCCH ( https://www.openstreetmap.org/?mlat=53.559128&mlon=9.989267&zoom=18 ). The installation will be available during 39C3 every night between 18:00 and 22:00. We recommend taking a look at this installation too. See also: https://chaos.social/@uact/115793315306498503 https://events.ccc.de/congress/2025/hub/event/detail/marching-ar-kita-political-art-presentation true 2025-12-27T22:00:00+01:00 22:00 00:25 SoS Stage H 39c3-collaboration-with-red-teams-in-military-operation en other Gathering, orchestrating and dissipating data during specific operations. Speaker: Anton Tseholnyk, AFU OSINT team https://events.ccc.de/congress/2025/hub/event/detail/collaboration-with-red-teams-in-military-operation true 2025-12-27T23:00:00+01:00 23:00 00:50 SoS Stage H 39c3-nerd-game-show en other 🙈 🙉 🙊 You Know Stuff ❎ 🆗 ☑️ Answer nerdy questions on your notebook / smartphone and win a (small) price 😸 😹 😻 https://kahoot.it/ Birdy1976 https://events.ccc.de/congress/2025/hub/event/detail/nerd-game-show true 2025-12-28T00:00:00+01:00 00:00 01:20 SoS Stage H 39c3-filmvorfuhrung-von-menschen-die-auf-baume-steigen de, en other The film "Of People Who Climb Trees" showcases how activists in Southern Germany and beyond carry out sometimes spectacular protest actions. The focus is on climate justice, as well as the consumption of resources and land. Everyone is welcome—whether you want to gain insight into the world of forest occupations, become more active, or are simply curious. Afterwards, an open discussion with climate activists will take place. English subtitles are available. Samuel_77 https://events.ccc.de/congress/2025/hub/event/detail/filmvorfuhrung-von-menschen-die-auf-baume-steigen true 2025-12-28T01:30:00+01:00 01:30 01:20 SoS Stage H 39c3-lounge-tunes other Listen to some eclectic lounge tunes with your favorite crew. yolo_crew https://events.ccc.de/congress/2025/hub/event/detail/lounge-tunes true 2025-12-28T01:30:00+01:00 01:30 00:30 SoS Stage H 39c3-cleanup other test test https://events.ccc.de/congress/2025/hub/event/detail/cleanup false 2025-12-27T11:00:00+01:00 11:00 01:20 SoS Lecture E 39c3-hack-your-brain-part-1 de other Wie funktioniert dein Gehirn wirklich – und wie kannst du es gezielt steuern? In diesem Talk erfährst du, wie dein Nervensystem und dein Gehirn aufgebaut sind, wie du Stress wirksam regulierst und wie Schlaf deine mentale Leistungsfähigkeit, Emotionen und Gesundheit bestimmt. Zusätzlich erhältst du konkrete neurobiologisch fundierte Tools zur direkten Anwendung im Alltag. Für alle, die ihr Gehirn nicht dem Zufall überlassen wollen. Johannes_Max https://events.ccc.de/congress/2025/hub/event/detail/hack-your-brain-part-1 true 2025-12-27T12:30:00+01:00 12:30 01:20 SoS Lecture E 39c3-hack-your-brain-part-2 de other Warum fällt es uns schwer, konzentriert zu bleiben – und wie lässt sich Aufmerksamkeit gezielt trainieren? In diesem zweiten Teil geht es um die neurobiologischen Grundlagen von Fokus, Aufmerksamkeit und Lernen. Du erfährst, wie dein Gehirn Informationen auswählt, speichert und langfristig verfügbar macht – und warum Ablenkung, Multitasking und Reizüberflutung diese Prozesse messbar beeinträchtigen. Zusätzlich erhältst du konkrete, wissenschaftlich fundierte Werkzeuge zur Verbesserung von Konzentration, Lernfähigkeit und mentaler Klarheit im Alltag. Johannes_Max https://events.ccc.de/congress/2025/hub/event/detail/hack-your-brain-part-2 true 2025-12-27T14:00:00+01:00 14:00 01:20 SoS Lecture E 39c3-demokratische-schule-die-radikalste-schulart-die-e de other Eine Schule in der Lehrer und Schüler über sämtliche Schulregeln gleichermaßen mitentscheiden. Eine Schule in der die Schüler komplett frei sind, in dem was sie lernen? Kann das funktionieren? Wie gehts den Kindern nach der Schulzeit und was heißt das für Eltern? Ich bin Schulgründer einer Demokratischen Schule und präsentiere euch anschaulich mit vielen Grafiken, Videos und ein paar Studien, wie das bei uns so läuft. Im Anschluss könnt ihr mir und einem Elternteil eines Schülers Fragen stellen. Momo42 https://events.ccc.de/congress/2025/hub/event/detail/demokratische-schule-die-radikalste-schulart-die-e true 2025-12-27T15:30:00+01:00 15:30 00:50 SoS Lecture E 39c3-gewaltfreie-kommunikation de other In diesem Workshop lernst du die Grundlagen der Gewaltfreien Kommunikation (GFK) nach Marshall Rosenberg kennen. Du erfährst, wie du deine eigenen Bedürfnisse klar ausdrückst, die Bedürfnisse anderer verstehst und Konflikte konstruktiv lösen kannst. Mit praxisnahen Übungen und Werkzeugen trainierst du, empathisch zuzuhören, Missverständnisse zu vermeiden und Beziehungen – beruflich wie privat – nachhaltig zu verbessern. Johannes_Max https://events.ccc.de/congress/2025/hub/event/detail/gewaltfreie-kommunikation true 2025-12-27T16:30:00+01:00 16:30 01:20 SoS Lecture E 39c3-anders-streiten-lernen de, en other We live in times of intense conflicts and their violent escalation. One of the central theses of Jalka's work is that a viable democracy and a conscious culture of constructive conflict resolution go hand in hand. Cultivating this ability requires a conscious decision to engage with individual, collective and societal patterns of dispute behaviour and conflict management. Starting with oneself, as well as in our interactions with others, in public discourse and in our behaviour towards others. With a willingness to change something in order to reduce, and in the best case even prevent, the suffering and violence that can potentially arise from conflicts. And to learn from this for the future. What exactly will this SOS session be about? We will engage in a number of exercises and discussion rounds based on the following questions: How do you deal with conflicts? How do others deal with conflicts? How do you experience conflicts? What exactly are conflicts? What dynamics promote conflicts? What patterns are there in place? How can we deal with conflicts constructively? How do conflicts caused by individual, interpersonal and structural factors differ? And: How can conflict management be designed to be sensitive to discrimination? I will share with you my experiences from my work as a mediator and from past workshops I have held on this topic. In addition to exercises, I will also bring along some literature for further reading. Please feel free to bring your own questions and insights to the session so that we can all learn from and with each other. I look forward to seeing you. in parts translated with DeepL.com (free version) Tomate_aka_Radikale_Liebe https://events.ccc.de/congress/2025/hub/event/detail/anders-streiten-lernen true 2025-12-27T19:30:00+01:00 19:30 00:50 SoS Lecture E 39c3-legale-halblegale-und-andere-tricks-um-ohne-geld-d de other Von Tricks zu bekannten Klassikern wie Containern, über eher unbekannte Geheimnisse, wie den Häppchenmelder und Gesundheitsversorgung für den Kampf im Untergrund, drehen wir. Hier gibt's eine gute Übersicht über das Leben zwischen Existenz-Minimum und Schabernack-Maximum. 16:04 AnnaKia https://events.ccc.de/congress/2025/hub/event/detail/legale-halblegale-und-andere-tricks-um-ohne-geld-d true 2025-12-27T20:30:00+01:00 20:30 00:50 SoS Lecture E 39c3-gi-meet-up de other Hey, you're here too? We are organising an informal meet-up for GI members, friends and anyone interested in the field of chaos. The German Informatics Society (GI) is a network of computer scientists committed to digitalisation that works for everyone. With more than 17,000 individual and 250 corporate members (from academia, business, administration and civil society), it is the largest professional association for computer science in the German-speaking world and has been representing the interests of computer scientists since 1969. With 14 specialist areas, over 30 active regional groups and countless specialist groups, the GI is a platform and mouthpiece for all disciplines in computer science. GI members drive the discipline forward, ask crucial questions and constantly provide new impetus. For computer science that is oriented towards the common good, inclusive and forward-looking. _Elena_Berlin_ Resa scherrie https://events.ccc.de/congress/2025/hub/event/detail/gi-meet-up true 2025-12-27T21:30:00+01:00 21:30 00:25 SoS Lecture E 39c3-hacking-medical-research-for-a-better-transition en other While medical institutions struggle to fill trans people's needs for a medical transition, an increasing number of trans people resort to managing their hormonal transition on their own. Alongside this, the DIY community has amassed a large amount of both theoretical and applied medical knowledge, matching and sometimes even surpassing researchers in the field. In this talk, I will point out what's right and wrong with institutionalized trans research, give insights into the DIY communities' pragmatic approach to community healthcare and show what we're doing to turn lay expertise and even anecdotes into evidence-based medical research -- all without a doctor involved. "all creatures welcome" -- all necessary science-prerequisites are included along the way. --- If you enjoyed this talk (or not), or if you missed it (or not) -- I will do a speedrun attempt of presenting the same material in under 4.5 minutes on Day 4: [https://events.ccc.de/congress/2025/hub/en/event/detail/speedrun-hacking-medical-research-in-under-45-minu](https://events.ccc.de/congress/2025/hub/en/event/detail/speedrun-hacking-medical-research-in-under-45-minu) ShadowCone (she/her) https://events.ccc.de/congress/2025/hub/event/detail/hacking-medical-research-for-a-better-transition true 2025-12-27T22:00:00+01:00 22:00 00:50 SoS Lecture E 39c3-finanzmanagement-fur-alle-uber-den-nachhaltigen-um de other Event NOT in english language - sorry. This is no "how to get rich fast" talk. This Talk is about the HOW of efficiently handling money. I want to give you the means to decide yourself, what risks to take and what investments to make. Most of my Information is from my Economic Computer Sciences Bachelors degree (mainly the economics part) Topics will be: How to calculate investments, how to calculate (expected) interest and compound interest, how to "sort" your debt to efficiently pay it off. After my nerdy maths lecture, there will be time for questions and topics you are interested in. (Still under SoS Rule: No commercial advertising or crypto shilling) I did a similar SoS last year, this year will even be with slides. Unfortunately, this talk was neither recorded nor translated. My (german language) slides are available for now at media.sebz.eu/39C3/Finanzvortrag_39C3.pdf sebz https://events.ccc.de/congress/2025/hub/event/detail/finanzmanagement-fur-alle-uber-den-nachhaltigen-um true 2025-12-27T23:00:00+01:00 23:00 01:20 SoS Lecture E 39c3-pudding-mit-stabchen other You bring the pudding We bring the chopsticks skorpy (she/her) https://events.ccc.de/congress/2025/hub/event/detail/pudding-mit-stabchen true 2025-12-28T01:00:00+01:00 01:00 00:50 SoS Lecture E 39c3-hacking-medical-research-bonus-round en, de other Due to popular demand I'll return. Not sure if i have a structured programm, but there will be a space for questions and connecting. see [https://events.ccc.de/congress/2025/hub/event/detail/hacking-medical-research-for-a-better-transition](https://events.ccc.de/congress/2025/hub/event/detail/hacking-medical-research-for-a-better-transition) for details ShadowCone (she/her) https://events.ccc.de/congress/2025/hub/event/detail/hacking-medical-research-bonus-round true 2025-12-27T18:15:00+01:00 18:15 01:00 SoS Lecture E 39c3-einfuhrung-lothelferinnen other Wir stellen die Bausätze vor, die beim Lötworkshop auf dem Junghackerinnentag gelötet werden. Außerdem geht es um die Sicherheit beim Löten und den Umgang mit den Betreuten. Henning Brinkmann https://events.ccc.de/congress/2025/hub/event/detail/einfuhrung-lothelferinnen true 2025-12-27T11:00:00+01:00 11:00 00:50 SoS Workshop D 39c3-jujutsu-a-git-compatible-version-control-system en other Jujutsu (jj) is a new version control system that uses Git as its backend. Since trying it last year, it has completely replaced Git for me. It manages to be less complex than Git, while giving you more control. I think you'll like it too! Lately, when people ask me complex Git questions, my answer is often: "First, install jj…" And that's only half a joke. :P --- A few things I like about Jujutsu: There's no index, but instead you get a subcommand for splitting changes. Commits have stable IDs that stay the same even after rewriting. Anonymous branches! Conflicts are first-class objects and don’t have to be resolved immediately during a rebase. Rewriting history is very easy. And because it's Git-compatible, you can use Jujutsu right away in existing projects without anyone else noticing. :3 I'm planning to do this session in two parts: First, an introductory talk about jj. After that, a "workshop" part where you can install Jujutsu and try it for yourself! blinry https://events.ccc.de/congress/2025/hub/event/detail/jujutsu-a-git-compatible-version-control-system true 2025-12-27T12:00:00+01:00 12:00 00:50 SoS Workshop D 39c3-noob-meetup de, en other Du bist auf dem Congress und hast plötzlich das Gefühl, eigentlich viel zu wenig Plan von all den Themen hier zu haben um hier zu sein? Du hast manchmal keinen Plan wovon die Leute eigentlich reden? Du bist nicht unbedingt wegen den IT-Themen hier, sondern vor allem wegen all dem anderen, was hier sonst noch so passiert? Wenn du irgendeine der Fragen mit ja beantworten kannst, bist du bei dieser Session genau richtig. Nicht großartig moderiert, einfach eine nette Kennenlernveranstaltung. Luna https://events.ccc.de/congress/2025/hub/event/detail/noob-meetup true 2025-12-27T13:00:00+01:00 13:00 00:50 SoS Workshop D 39c3-vegan-chaos-welcome-meet-greet_zdm4 de, en other **Finally Congress again! The Vegan Chaos Community is a forum for vegan hacktivists and people concerned about animal rights and sustainable development.** Are you interested in these topics? Do you have an idea that you would like to realise or are you already active somewhere in the field of veganism? Or do you just want to network with like-minded people? Either way, come to our Meet & Greet on Day 1! We will get to know each other, present what has happened so far and make valuable connections - for the upcoming days here in Hamburg and beyond! All Creatures are Welcome! ### More Information: - To the **[Vegan Chaos Community Assembly](https://events.ccc.de/congress/2025/hub/en/assembly/detail/vegan_chaos)** - Follow us at Mastodon: **[@vegan@chaos.social](//chaos.social/@vegan)** ### Our Events: - 27.12. | 13:00 | Room D | **[Vegan Chaos: Welcome Meet & Greet](https://events.ccc.de/congress/2025/hub/en/event/detail/vegan-chaos-welcome-meet-greet_zdm4)** - 27.12. | 20:30 | Assembly | **[Vegan Chaos: Let's Talk](https://events.ccc.de/congress/2025/hub/en/event/detail/vegan-chaos-lets-talk-day-1)** - 28.12. | 11:30 | Assembly | **[Vegan Chaos: Let's Talk](https://events.ccc.de/congress/2025/hub/en/event/detail/vegan-chaos-lets-talk-day-2)** - 29.12. | 13:00 | Room D | **[Vegan Chaos: Bring-Along Fingerfood Brunch](https://events.ccc.de/congress/2025/hub/en/event/detail/vegan-chaos-bring-along-fingerfood-brunch)** - 29.12. | 18:30 | Assembly | **[Vegan Chaos: Let's Talk](https://events.ccc.de/congress/2025/hub/en/event/detail/vegan-chaos-lets-talk-day-3)** - 30.12. | 11:00 | Room 6 | **[Vegan Chaos: Farewell Meeting](https://events.ccc.de/congress/2025/hub/en/event/detail/vegan-chaos-farewell-meeting)** [](https://events.ccc.de/congress/2025/hub/en/assembly/detail/vegan_chaos) ganzesaetze (he/him) phil_vcc (he/him) https://events.ccc.de/congress/2025/hub/event/detail/vegan-chaos-welcome-meet-greet_zdm4 true 2025-12-27T14:00:00+01:00 14:00 01:50 SoS Workshop D 39c3-kinkygeeks-ropelabs-beginner-bondage-workshop-1 en other KinkyGeeks and RopeLabs join forces to host a Beginner Bondage Workshop. Instructors [@DoodleMe](https://events.ccc.de/congress/2025/hub/user/DoodleMe) and [@KnottyLola](https://events.ccc.de/congress/2025/hub/user/KnottyLola) will guide you through the foundations of Japanese rope bondage, also known as Shibari. You will learn core safety concepts, basic theory, and a small set of beginner-friendly knots. These are practical ties you can use at home and that form the base for more complex work later. This is a peer-based workshop aimed at complete beginners. No prior experience is needed. Singles, pairs, and small groups are all welcome. The workshop runs in lab mode. There is no sexual content and everyone remains fully clothed. The space is 18+ only. Please bring your own non-stretch rope if you have it. Practice rope will be available. Bring a blanket or cushion to sit on the floor comfortably. There is no dress code, but fitted clothing makes tying easier than loose layers. The workshop will be taught in English. Places are limited by room size. You will need a ticket per person. Get your free ticket here: [https://ticket.kinkygeeks.de/kinkygeeks/101-1/](https://ticket.kinkygeeks.de/kinkygeeks/101-1/) Pez (he/they) https://events.ccc.de/congress/2025/hub/event/detail/kinkygeeks-ropelabs-beginner-bondage-workshop-1 true 2025-12-27T16:00:00+01:00 16:00 00:25 SoS Workshop D 39c3-wie-eine-gruppe-nerds-einen-wald-rettete-und-_bgci de other Klimagerechtigkeitsaktivismus: ein Blick hinter die Kulissen. In Augsburg und Ravensburg gibt es seit 2019 Nerdgruppen, die nicht nur starke Meinungen zu Programmiersprachendesign haben :-), sondern auch mit zivilem Ungehorsam versuchen, einen Beitrag für Klimagerechtigkeit zu leisten. Im Laufe der Zeit haben wir verschiedene Techniken erlernt und weiterentwickelt, die größtenteils auf beliebige andere Städte übertragbar sind. Aktivismus wirkt leider meist verzögert, indirekt oder schwer quantifizierbar. In dieser Session möchten wir einen ganz bestimmtes Projekt vorstellen, bei dem sich ausnahmsweise der Erfolg doch unmittelbar und direkt eingestellt hat: Der erfolgreichen Rettung des rodungsbedrohten Forst Kasten bei München. In Zeiten des Rechtsrucks freut sich vielleicht die eine oder andere Person hier über etwas Positives :-) **[Fotos](https://chaos.quasicoherent.io/)** IngoBlechschmidt https://events.ccc.de/congress/2025/hub/event/detail/wie-eine-gruppe-nerds-einen-wald-rettete-und-_bgci true 2025-12-27T16:30:00+01:00 16:30 01:20 SoS Workshop D 39c3-selbsthilfegruppe-verwaltungsdigitalisierung-faxge de other Ähnlich wie in den letzten Jahren wollen wir uns auch dieses Jahr wieder treffen und uns rund um das Thema Verwaltungsdigitalisierung austauschen und vernetzen. Was ist der Faxgeräteclub und warum machen wir das? Wenn wir über Behörden-IT sprechen, dann sprechen wir oft über einen zwingend notwendigen Wissensaufbau und die Internalisierung von IT-Kompetenz in der öffentlichen Verwaltung. Aber wer sich dann tatsächlich für einen Job in der Verwaltung entscheidet oder aus der Zivilgesellschaft heraus positiv auf die Verwaltung einwirken will, die:der braucht viel Überzeugungstalent und oft auch Durchhaltevermögen. Aber wir können auch viel Positives bewirken. Woran scheitert es in der Praxis, wo liegen die strukturellen Probleme und welche Impulse braucht es jetzt aus der Politik? Wir sprechen im Faxgeräteclub über unsere Erfahrungen im Alltag in und mit Behörden, darüber, was in der Verwaltung alles noch falsch läuft und wie wir gemeinsam etwas daran ändern können. Kommt vorbei uns lasst uns gemeinsam in lockerer Runde ein wenig diskutieren und Pläne schmieden! Willkommen sind alle, die sich für die IT der öffentlichen Verwaltung interessieren und/oder gerne mit uns ihre Ideen oder Fragen teilen möchten. iusan https://events.ccc.de/congress/2025/hub/event/detail/selbsthilfegruppe-verwaltungsdigitalisierung-faxge true 2025-12-27T18:15:00+01:00 18:15 01:00 SoS Workshop D 39c3-lingo-coordination-1 other Coordination Meeting of Lingo angels https://events.ccc.de/congress/2025/hub/event/detail/lingo-coordination-1 true 2025-12-27T19:30:00+01:00 19:30 01:20 SoS Workshop D 39c3-burgerrat-zur-biometrischen-authentifizierung-der- de other The year is 2040. Everyday digital life is convenient, but the digital sovereignty of state and civil society remains a sensitive issue. Recent approaches to authentication based on behavior, physical characteristics, or DNA are intended to make many things even easier – but do we want that, and if so, how? In our workshop, you will be part of a citizens' assembly deciding on the applications, implementation, and limits of these technologies. Join us in discussing the focus for tomorrow's biometrics! (This workshop will be held in German.) grbll philis https://events.ccc.de/congress/2025/hub/event/detail/burgerrat-zur-biometrischen-authentifizierung-der- true 2025-12-27T21:00:00+01:00 21:00 00:50 SoS Workshop D 39c3-ethical-non-monogamy-enm-101-what-are-they-talking en other Ethical non-monogamy, whether its polyamory, relationship-anarchy, open relationships, solo-poly and so on are on the rise. But understanding, what these new approaches to relationships are all about sometimes seems a little difficult because of all the lingo we use to make our conversations easier. This session gives a little look into the meaning of strange terms like polycule, compersion or metamour, easily misunderstood ideas like garden party enm vs. kitchen table enm, or acronyms like NRE. Armed with these (new?) concepts we'll also have a little Q&A where we'll try to give some insights into the realities of ENM life. zenme so-ka (he / him) https://events.ccc.de/congress/2025/hub/event/detail/ethical-non-monogamy-enm-101-what-are-they-talking true 2025-12-27T22:00:00+01:00 22:00 01:20 SoS Workshop D 39c3-electronic-instruments-jam-read-description-if-int de, en other Like last year we jam (playing spontaneous/improvised music for ourselves) together in small groups. In order to avoid a high noise level in the room we are going to use Headphones. We welcome every kind of Instrument from your laptop with a midi-controller, your E-Guitar, a Microphone to your modular synthesizer. If you want to participate please read the following carefully. Please bring the following with you if you plan to participate: (if you don't bring the stuff you may be able to borrow it) - Headphones - Extension Chord/Power Strip if your stuff needs power - Cable to send your tones to the other people. Small audio jack is the prefered method. Adapters are nice. If you can, it is nice to bring Instruments for other people so people can participate without knowing about the jam before congress. It is probably a good Idea to write your name/a unique identifier on your stuff to avoid confusion. I have designed a PCB that lets 5 People plug in their instruments and headphones via small audio jack. Only the Headphone volume can be adjusted on the board. Unfortunately the board is still in the mail and I don't know if it works at all. For this reason it would be nice if you could bring Equipment to route peoples audio signals to Headphones. Especially Mixers Multi-Headphone-Amplifiers and Cables to connect everything together would be appreciated. Matrix Room for Coordination: https://app.element.io/#/room/#electronic-instruments-jam-session:kif.rocks I'm excited to see all of you :) https://events.ccc.de/congress/2025/hub/event/detail/electronic-instruments-jam-read-description-if-int true 2025-12-27T23:30:00+01:00 23:30 00:50 SoS Workshop D 39c3-kherson-lgbtq-under-occupation en other Queer People in Occupied Territories: Cases from Kherson This talk is about the experiences of queer people living in the temporarily occupied territories of Ukraine, with a focus on Kherson. Using real-life cases, it shows how war, occupation, and strict control affect LGBTQ+ people’s daily lives — their safety, visibility, ability to stay true to their identity, and to keep in touch with their community. The talk will cover: Risks and survival strategies under occupation, including hiding one’s identity, internal and external displacement, and self-censorship. Violence and threats faced by LGBTQ+ people, from psychological pressure and blackmail to direct repression by the occupying authorities. The talk will be held online. https://events.ccc.de/congress/2025/hub/event/detail/kherson-lgbtq-under-occupation true 2025-12-28T00:30:00+01:00 00:30 07:30 SoS Workshop D 39c3-shitty-robot-workshop de, en other We build Robots from garbage and need more garbage! Bring your elektronic waste und soldering iron, multimeter and hammer! Microcontrollers and other "reasonable" elektronic components alre also welcome! No limits on age, no limits on weight and no limits on technology! On Day 3 we let the robots battle each other : https://events.ccc.de/congress/2025/hub/en/event/detail/shitty-robot-battle The system says that the workshop ends at 1:50, but we do not stop then ;-) We plan to tinker until 8 a.m. There ist a box in Saal D where you can drop hardware. Neo https://events.ccc.de/congress/2025/hub/event/detail/shitty-robot-workshop true 2025-12-27T11:00:00+01:00 11:00 00:50 SoS Saal 6 39c3-renewable-power-cycles-patching-parlamentarische-d de other How can we work together to improve political decision-making processes in the long term? What do you want from democracy? Motivation: While our democracy can be shaped by the people as they wish on paper, the population seems to be largely dissatisfied with political actions: - The handling of many crises appears to be inadequate - Urgent problems seem to be postponed - Democratic participation seems tedious and ineffective We would like to work together to find ways to improve, that can be implemented within the framework of our existing political system. Procedure: - 15 min. presentation on motivation and information - 35 min. bug fixing - Moderated discussion round to jointly develop solutions htext https://events.ccc.de/congress/2025/hub/event/detail/renewable-power-cycles-patching-parlamentarische-d true 2025-12-27T12:00:00+01:00 12:00 01:25 SoS Saal 6 39c3-shoc-1 other Scheduling Meeting for Heralds und Stagecoordinator angels https://events.ccc.de/congress/2025/hub/event/detail/shoc-1 true 2025-12-27T13:30:00+01:00 13:30 00:25 SoS Saal 6 39c3-wtf-nochmal-das-ganze_rvsg de, en other The system of harassing payment cards for people receiving asylum seeker benefits is not a new idea, but has been dusted off from the 1990s/2000s. But even back then, there was resistance – and it was anything but boring! Revel in the old days with us and be inspired by past actions and successes! We show pictures of the initiative against the chip card system in Berlin, which was active there mainly in the noughties against the precursors of today's payment cards. neinzurbezahlkarte https://events.ccc.de/congress/2025/hub/event/detail/wtf-nochmal-das-ganze_rvsg true 2025-12-27T14:00:00+01:00 14:00 00:55 SoS Saal 6 39c3-poc-intro other Introduction for Eventphone Angels https://events.ccc.de/congress/2025/hub/event/detail/poc-intro true 2025-12-27T15:00:00+01:00 15:00 00:55 SoS Saal 6 39c3-signal-intro other Introduction for Signal Angels https://events.ccc.de/congress/2025/hub/event/detail/signal-intro true 2025-12-27T16:00:00+01:00 16:00 00:55 SoS Saal 6 39c3-c3auti-1 other https://events.ccc.de/congress/2025/hub/event/detail/c3auti-1 true 2025-12-27T17:00:00+01:00 17:00 00:55 SoS Saal 6 39c3-accessibilty-helper-introduction de, en other Introduction Meeting for Accessibility Helpdesk Angel Introduction Meeting for Accessibility Helpdesk Angels. [Ausführliche Infos im Engelsystem](https://engel.events.ccc.de/angeltypes?action=view&angeltype_id=40) https://events.ccc.de/congress/2025/hub/event/detail/accessibilty-helper-introduction true 2025-12-27T18:15:00+01:00 18:15 01:00 SoS Saal 6 39c3-video-mixer-1 other Scheduling Meeting for Video Mixer Angels https://events.ccc.de/congress/2025/hub/event/detail/video-mixer-1 true 2025-12-27T19:30:00+01:00 19:30 01:20 SoS Saal 6 39c3-einfuhrung-embedded-rust-fur-workshop-hakkaa-board en, de other _Introduction to Embedded Rust on Microcontrollers and the [Hakkaa workshop task](https://events.ccc.de/congress/2025/hub/en/project/detail/assembly/hakkaa-board-smd-soldering-embedded-rust-for-begin/). This introduction is mostly aimed at participants with some experience in Rust._ For everyone who has already taken their first steps with Rust and can't wait to get knee-deep into using Rust on a Microcontroller. It aims to show you the little differences of this environment, presenting the workshop challenge and pointing you in the right direction for getting started. For absolute beginners we recommend to attend [Rust programming language: An absolute beginner workshop with intro presentation](https://events.ccc.de/congress/2025/hub/de/event/detail/rust-programming-language-an-absolute-beginner-wor) first and then our [second round of this introduction on day three](https://events.ccc.de/congress/2025/hub/de/event/detail/einfuhrung-embedded-rust-fur-workshop-hakkaa-_mlyg). This session starts with a presentation of about 30 minutes in English and a round of questions for all. After that, our team supports you with your first self-paced steps. The initial part of the presentation covers using Rust on a microcontroller in general. The second part focuses on working with the Hakkaa board. If you've got a question after this session, you can find us at the Hakkaatachi assembly or in [our Matrix chat](https://matrix.to/#/#hakkaatachi-39c3:matrix.org). We recommend: * Having a soldered and tested [Hakkaa-Board](https://github.com/hakkaatachi/hakkaa-hardware) (whose kit you can get at the Hakkaatachi assembly) * Your laptop set up with the [development tooling](https://github.com/hakkaatachi/hakkaa-firmware?tab=readme-ov-file#setup) so that you can spend more time on programming than on installing * Your laptop fully charged References: * [Presentation Slides](https://christian-meusel.de/presentations/2025-39c3-embedded-rust-for-hakkaa-2/) sirhcel https://events.ccc.de/congress/2025/hub/event/detail/einfuhrung-embedded-rust-fur-workshop-hakkaa-board true 2025-12-27T21:00:00+01:00 21:00 00:50 SoS Saal 6 39c3-39c3-schedule-app-users-meetup en other # About - In this session you can talk to the maintainer of the Congress app (for Android) in person. - Bring **your questions and feedback**. Feel free to send a private message (*@tbsprs@chaos.social*) before. - Existing issues are collected in the [GitHub repository](https://github.com/EventFahrplan/EventFahrplan/issues). # Languages - I am able to talk both English and German. # Not a workshop - This will **not** be a workshop format to set up the project nor to program together. # Links - [Project website](https://eventfahrplan.eu) - [Source code repository](https://github.com/EventFahrplan/EventFahrplan/issues) - [Translation platform](https://crowdin.com/project/eventfahrplan) tbsprs (he/his) https://events.ccc.de/congress/2025/hub/event/detail/39c3-schedule-app-users-meetup true 2025-12-27T22:00:00+01:00 22:00 00:50 SoS Saal 6 39c3-c-code-testing-pass-fail-or-segfault en, de other PASS, FAIL, or SEGFAULT? I am curious how other people test their software, particularly C software. Do you test at all? How do you do it? Do you have any hacks to prevent you from shooting yourself in the foot? Let's share your experiences! To break the ice and get the conversation started, I will give a short talk about my journey through the testing jungle. And then let's have an open discussion where you can talk about your testing approach. It would be awesome if you could show us a test you wrote. Everyone is welcome, especially if you're just curious. No testing or C experience is necessary. This is a great place to ask questions and learn from the workflows of others. You can contact me (Dominik) via email: 39C3@dominikloidolt.at See you. Find the slides here: https://github.com/dloidolt/39c3_c_code_testing Loidi https://events.ccc.de/congress/2025/hub/event/detail/c-code-testing-pass-fail-or-segfault true 2025-12-27T23:00:00+01:00 23:00 00:50 SoS Saal 6 39c3-chatkontrolle-stoppen_0i0p de other This workshop will take place in German. (see German version for more) For practical information on Chat Control and an update on the current situation we recommend you attend the talk "Chatkontrolle - Ctrl+Alt+Delete": [https://events.ccc.de/congress/2025/hub/en/event/detail/episode-ii-der-rat-schlagt-zuruck](https://events.ccc.de/congress/2025/hub/en/event/detail/episode-ii-der-rat-schlagt-zuruck) khaleesi (she/her) pneutig https://events.ccc.de/congress/2025/hub/event/detail/chatkontrolle-stoppen_0i0p true 2025-12-28T00:00:00+01:00 00:00 00:25 SoS Saal 6 39c3-transdermal-hrt-brewing-for-beginners-placeholder de, en other In diesem Workshop lernen wir, wie wir transdermale HET (Hormon Ersatz Therapie) Produkte für trans Personen einfach selber machen können. Die beiden Möglichkeiten sind dabei Sprays und Gels, für beides sind genug Zutaten da. Es gibt nur einen (rudimentären, scuffed) Setup dafür und es eignet sich nicht um in größerer Runde zu arbeiten. Wenn viele kommen gerne unabhängigen Austausch von Rezepten, Methoden, Vernetzen von trans Menschis oder Aktivistis. In den Folgetagen kann an der Asembly (Projekt31) auch noch gut gebraut werden . Lizzz (they / she) https://events.ccc.de/congress/2025/hub/event/detail/transdermal-hrt-brewing-for-beginners-placeholder true 2025-12-28T00:30:00+01:00 00:30 00:50 SoS Saal 6 39c3-how-does-vc-funding-actually-work-actually en other You probably have heard of "Venture Capital" - the mysterious infinite source of money that powers the startups of Sillicon Valley (and beyond), that powers the "AI revolution" and "crypto revolution." You even might have heard names like YCombinator and a16z, or terms like "Unicorn", "PMF" and "TAM". But where does that money come from? How can you get it? And why do people continue to give money to startups, despite 90% of them returning 0 money? Even among IT nerds, VC is often seen as something vague and mysterious - despite it shaping the world of technology since the early 2000s. Some people get money, some don't - with little rhyme or reason. This is a small talk of someone who actively participated in the VC ecosystem. The primary goal isn't to bash or praise that industry (though it deserves a lot of bashing), but to shine a light on how it works under the hood. Note: this is an adapted version of a short lecture I gave at the Mega-Knowledgecamp (Hacksaar 2025) aricake https://events.ccc.de/congress/2025/hub/event/detail/how-does-vc-funding-actually-work-actually true 2025-12-28T01:30:00+01:00 01:30 00:25 SoS Saal 6 39c3-hold-my-passkey-the-passwordless-future-not-happen en other We all struggle with lots of passwords, often forgotten, reused or leaked. Passkeys promise to free us from both the hassle and the breaches. But will they solve authentication, or are they failed by design? A deep‑dive into convenience, control, and everything between. Passkeys are designed to replace passwords. All you need is your phone or hardware token, meaning you have to remember only one password at most. But isn't that the promise of password managers? Although they fulfil a similar role, password managers usually use classic passwords, making them seem like an interim solution on the way to more secure authentication. Wouldn't it be great to get rid of passwords once and for all and switch to passkeys? While passkeys promise a passwordless future, the reality is far more complex. User reluctance, questionable usability and corporate interests are making the case for passkeys increasingly difficult. So let's delve into whether passkeys do make sense from the perspective of both professional and regular users. This talk is not a technical deep dive into passkeys, but rather addresses the issues of IT management & IAM and whether secure "passwordless" auth can work in the real world. The aim is not to give a bureaucratic or opinionated talk, but to open a discussion about enshittification and whether auth (doesn't) work(s) for both regular and pro users. Haris https://events.ccc.de/congress/2025/hub/event/detail/hold-my-passkey-the-passwordless-future-not-happen true 2025-12-27T11:00:00+01:00 11:00 00:50 Komonin 39c3-astrology-as-a-reflection-tool-for-daily-routines- en other Astrology is usually associated with horoscopes, prediction, or belief systems. In this self-organised session, we’ll test a different idea: using astrology as a symbolic language to reflect on daily routines, decision-making, and energy management — without fate, mysticism, or “the stars made me do it”. The session is interactive and experimental. We’ll look at how astrological concepts can function similarly to tools people already use: retrospectives, calendars, personality models, or context-setting frameworks. This is not about accuracy, belief, or convincing anyone. It is about usability: Does this framing help reflection? Where does it break down? When does it become annoying or meaningless? No astrology background required. Critical perspectives are explicitly invited. - **Presentation (slides shared):** https://docs.google.com/presentation/d/1yYnfNnj1-JQ1y1ktCqc6a8R2b84gXZtqu2QwIBQ2EN4/edit?usp=sharing - **Group Chat (Signal):** https://signal.group/#CjQKIJrpHi5JhoNLiwBO0hXzhPmaCzJ9QQdr2yioP-7m_7dwEhD2HZkrlGzn50-Wvrtzsy8Y katy13 https://events.ccc.de/congress/2025/hub/event/detail/astrology-as-a-reflection-tool-for-daily-routines- false 2025-12-27T12:00:00+01:00 12:00 00:50 Komonin 39c3-femenism de, en other When it comes to feminism, many men* who are generally in favor of it stay in the background: They don't want to intrude, override any woman*'s voice, doubt that they have anything to say, think they know too little to participate in the discussion. We think that feminism is ready for the next (r)evolutionary phase, in which men are not "allies" but see themselves as a subject of feminism. What do you think: Time for FeMENism? In this session we want to collect male* voices (too), create room for conversations and understand how people of all genders view this topic. All creatures welcome! philis https://events.ccc.de/congress/2025/hub/event/detail/femenism false 2025-12-27T13:00:00+01:00 13:00 00:50 Komonin 39c3-meshtastic-chaos-creatures-mcc-channels-distributi en other A call of gathering of all creatures with an active Meshtastic node to import a custom-made encrypted chaos channels for communication across the CCC event with all fellow Meshtastic Chaos Creatures. At end of onboarding of the distribution party, written details might will be left at TAMI Assembly table to be picked up by late bloomers (depends on logistics). * Any questions you have regarding the recommended preset, configurations and region will be explained during the gathering. * This event is self-organized by TAMI Hackerspace community, and is not officiality affiliated with Meshtastic Devs. bak3n3k0 (He/Him) https://events.ccc.de/congress/2025/hub/event/detail/meshtastic-chaos-creatures-mcc-channels-distributi false 2025-12-27T15:00:00+01:00 15:00 00:50 Komonin 39c3-share-your-citizen-science-projects-pets-and-paths en, de other Citizen science can mean many things: DIY measurements, community research, data activism, social experiments, artistic inquiry, or collective knowledge work. At CCC, many such projects exist — often without ever using the label “citizen science”. This session follows a “show your pet” format. Participants are invited to bring and briefly present their own projects, tools, experiments, or unfinished ideas and share: what the project does who participates how (or if) it serves a community whether calling it “citizen science” helps or gets in the way Projects do not need to be finished, funded, successful, or formally recognised. Critical, messy, and experimental work is explicitly welcome. Alongside peer exchange, the session creates space to explore if and how collaboration with the wider citizen science community — including ECSA — could be useful: What kinds of support would actually help these projects? Where does institutional collaboration feel helpful — or harmful? What would make collaboration worth the effort? The goal is not recruitment or alignment, but to understand what collaboration should look like from the project side, if at all. Website: https://www.ecsa.ngo/ Mastodon: [@ECSA](https://events.ccc.de/congress/2025/hub/user/ECSA) Start your own Citizen Science Project https://moodle.citizenscience.eu/ katy13 https://events.ccc.de/congress/2025/hub/event/detail/share-your-citizen-science-projects-pets-and-paths false 2025-12-27T16:00:00+01:00 16:00 00:50 Komonin 39c3-social-work-get-together de, en other where are the social workers within the chaos? get together :) spark (keine) https://events.ccc.de/congress/2025/hub/event/detail/social-work-get-together false 2025-12-27T17:00:00+01:00 17:00 00:50 Komonin 39c3-nextcloud-collectives-meetup de, en other You use Nextcloud Collectives within a group or plan to do so? Come along and talk with the maintainers and other community members. With Collectives we aim to build a collaborative knowledge database for self-organized and activist groups. Currently we focus on fostering the community and reducing hierarchies between us, the developers and the direct users of Collectives. https://events.ccc.de/congress/2025/hub/event/detail/nextcloud-collectives-meetup false 2025-12-27T18:00:00+01:00 18:00 00:25 Komonin 39c3-se-habla-espanol en other Un espacio para reunir a la comunidad de habla hispana en el 39c3. La idea es presentarnos brevemente (¿de dónde vienes? ¿en qué andas?), platicar y hacer comunidad. El idioma principal será español pero el espacio es abierto y flexible. Sin formalidades ni láminas, solo personas. A space to bring together the Spanish-speaking community at the 39c3. The idea is to briefly introduce ourselves (where are you from? what are you working on?), chat, and build community. Spanish will be the main language but the space is open and flexible. No formalities or slides, just people. KarlaBago manuelrabade https://events.ccc.de/congress/2025/hub/event/detail/se-habla-espanol false 2025-12-27T20:00:00+01:00 20:00 00:25 Komonin 39c3-sbor-medzuslowjanskogo-jezyka en, de other Medžuslovjanski jest ustrojny jezyk, razumlivy vsim Slovjanam. Sbor otvorny vsem interesovatim – tož ako medžuslovjanskym ne govoriš. Cělkom bez plana. Dobrodošli! [Hočem veče togo!](http://steen.free.fr/interslavic/) / [Ne razuměm :(](https://interslavic-dictionary.com) doofus https://events.ccc.de/congress/2025/hub/event/detail/sbor-medzuslowjanskogo-jezyka false 2025-12-27T23:30:00+01:00 23:30 00:25 Komonin 39c3-chatbot-memoryfinetuningpersonality-meetup en other A brief meetup for those working in (private and/or decentralized and/or open-source and/or academic) LLM memory, LLM finetuning, and everything more involved than system prompts for LLMs Indraos https://events.ccc.de/congress/2025/hub/event/detail/chatbot-memoryfinetuningpersonality-meetup false 2025-12-28T01:00:00+01:00 01:00 00:25 Komonin 39c3-twilight-imperium-gathering de, en other EDIT 29.12.25: We created a group in signal. If you want to get in contact with chaos creatures who are interested in TI, just join: https://signal.group/#CjQKIImIrmmsDgqS5AJaBs8BVTcO2upgeTPtyPv3a8zu35CoEhAzxY6MsB3eYVmd4-7pRfLj Do you play Twilight Imperium and want to discuss it with other creatures or want to find/create new gaming groups? Or do you not know this epic and complex sci-fi board game about diplomacy, politics, war and intrigue yet? Let us use this short time slot for a quick meeting to share our contacts to stay in touch. Possible advantages we are going to have are e.g.: - New regional groups for (regular) games - Sharing/Discussions about house rules - Creation/Discussions of new maps beetroot (he/him) https://events.ccc.de/congress/2025/hub/event/detail/twilight-imperium-gathering false 2025-12-27T14:00:00+01:00 14:00 01:00 Komonin 39c3-komona-we-can-make-it-work-plenary en, de other Let's meet and discuss everything what's necessary, and everything what's not. https://events.ccc.de/congress/2025/hub/event/detail/komona-we-can-make-it-work-plenary false 2025-12-27T18:30:00+01:00 18:30 01:30 Komonin 39c3-threat-model-best-practices-for-activists de other We want to talk about IT-Security best practices for activists in Germany and develop a general threat model. The conversation will likely be in german. Ihr könnt hier einen Kontakt dalassen (zB weil ihr nicht kommen konntet): https://cryptpad.fr/form/#/2/form/view/sImMYiqKh0WAOY7+c0zDmtzrNHPFCUSIqjT2J3I5q1w https://events.ccc.de/congress/2025/hub/event/detail/threat-model-best-practices-for-activists false 2025-12-27T20:30:00+01:00 20:30 01:30 Komonin 39c3-drone-cymatics-sound-jam en, de other With Signal, Whatsapp, and other centralized messengers suddenly running their servers in an authoritarian territory, we need a decentralized alternative. Delta Chat apps work with most e-mail servers but chatmail servers are more secure, faster and easy to setup, and have become the primary choice for new users. Learn how to host chatmail, and help creating the resilient chatmail server network for a shattered world! You don't need expensive hardware to run a chatmail server - a cheap VPS or raspberry pi can support hundreds of users. All storage is temporary, as Delta Chat stores messages only on end devices. This makes chatmail tremendously easy to get started with - bring your child and learn together. To setup a chatmail server, you need: - SSH root access to a server, with a public IP address, and a domain (we will bring some for the workshop) - basic command line knowledge So come as you are, and join this chat group to get started: https://i.delta.chat/#AB68F428FCEF88D32B46189314FDBB18B2789654&a=groupedit%40nine.testrun.org&g=39c3%20chatmail%20relay%20workshop&x=zIwlF9uvvoxzDLo2GBFRRm2l&i=vcZd2RULjs39Vl-Fs2L-ZfIT&s=oUmgp0IBDyBnI7dTslH3CK37 Nami (they/them) https://events.ccc.de/congress/2025/hub/event/detail/drone-cymatics-sound-jam false 2025-12-27T22:00:00+01:00 22:00 01:30 Komonin 39c3-schlingelkind-pres-deep-dark-and-organic-techno other https://events.ccc.de/congress/2025/hub/event/detail/schlingelkind-pres-deep-dark-and-organic-techno false 2025-12-28T00:00:00+01:00 00:00 01:00 Komonin 39c3-das-wort-fur-zuhause-ist-feuer-midnight-porn de other CN: Pornographie, Polizeigewalt Trailor Sparks (er/ihm) von Komona liest aus seinem frisch erschienen Roman. Sobald du denkst, irgendwer sollte etwas tun, bist du irgendwer. Egal, worum's geht. Einige Freund*innen bewegen sich und ihre Beziehungen durch autonome Zonen, Pläne, Besetzungen, Wälder und Träume. Sie versuchen etwas aufzubauen, irgendwo anzufangen, das richtige Ziel zu finden und vor lauter Klimakollaps und drohendem Faschismus die eigenen Werte nicht zu verlieren. At the same time, it’s about the thrill of yet another journey, revolt, camp, action und das Scheitern auf dem Weg hinter die Kiefermonokulturen. Wann? Jetzt. Immer jetzt. «Transzentrierte Pornographie, problematische und doch liebenswerte Figuren, die G*****frage und sogar a kind of magic. Endlich ein Buch, in dem wir uns repräsentiert fühlen!» – einige Anarchist*innen https://events.ccc.de/congress/2025/hub/event/detail/das-wort-fur-zuhause-ist-feuer-midnight-porn false 2025-12-27T14:45:00+01:00 14:45 00:45 Sendezentrum Bühne (Saal X 07) 39c3-podcast-radiomegahertz-mhz-rein-khz-raus-ultraschall-fm-mittendrin de Live-Podcast Bühne In dieser Live-Session wird gescannt, gesampelt und gesendet: medizinischer Ultraschall im Megahertz-Bereich trifft digitale Audioverarbeitung mit 48 Kilohertz. Ultraschall.fm dient als Interface zwischen Körper und Codec – vom Schallkopf bis zum Kopfhörer, von Wellen im menschlichen Gewebe zu (Radio-) Wellen im Äther. Radiomegahertz demonstriert die open source Podcasting-Software zur Produktion einer medizinischen Live-Ultraschall Untersuchung. Die Session ist für alle Podcast-Kreaturen, die den Megahertz-Bereich auch hören und nicht nur sehen möchten. This live session involves scanning, sampling, and broadcasting: medical ultrasound in the megahertz range meets digital audio processing at 48 kilohertz.Ultraschall.fm serves as an interface between the body and the codec—from the transducer to the headphones, from waves in tissue to waves in the ether. Radiomegahertz demonstrates the open source podcasting software. The session is for all creatures who want to hear the megahertz range and not just see it. Wenn Neo in die Matrix schaut, sieht er die Welt. Ärzt:innen sollten bei der Betrachtung eines Ultraschallbildes mit den typischen Graustufen die Anatomie des Menschen erkennen. Doch die Entstehung und Interpretation des Graustufenbildes liegt in der Hand der Ultraschallenden. Neo muss genauso wie Ärzt:innen lernen, die Technik zu nutzen und die Bilder zu interpretieren. Radiomegahertz erstellt Podcasts über Ultraschall in der Medizin und wird während der Live-Session auf die Möglichkeiten und Grenzen von Ultraschall eingehen. Zur Verdeutlichung werden Freiwillige live „geschallt” (sonografiert). Das Ziel ist die Erstellung eines Podcasts bzw. Videopodcasts. Zur Produktion wird die Open-Source-Software Ultraschall.fm verwendet. Die Software-Entwickler von Ultraschall.fm sind während der Session vor Ort und bieten Support bei podcasttypischen Fragen. When Neo looks into the Matrix, he sees the world. When looking at an ultrasound image with the typical gray scale, doctors should be able to recognize human anatomy. However, the creation and interpretation of the gray scale image is in the hands of the ultrasound technician. Just like doctors, Neo must learn to use the technology and interpret the images. Radiomegahertz creates podcasts about ultrasound in medicine and will discuss the possibilities and limitations of ultrasound during the live session. To illustrate this, volunteers will be “scanned” (sonographed) live. The goal is to create a podcast or video podcast. The open-source software Ultraschall.fm will be used for production. The software developers from Ultraschall.fm will be on site during the session to offer support with podcast-related questions. https://pretalx.c3voc.de/media/39c3-sendezentrum/submissions/8TYKHA/Header_Sendezentrum_Beitrag_G2pakog.png Tim Mäcken | Radiomegahertz https://events.ccc.de/congress/2025/hub/event/detail/podcast-radiomegahertz-mhz-rein-khz-raus-ultraschall-fm-mittendrin https://pretalx.c3voc.de/39c3-sendezentrum/talk/8TYKHA/ https://pretalx.c3voc.de/39c3-sendezentrum/talk/8TYKHA/feedback/ false 2025-12-27T16:00:00+01:00 16:00 00:45 Sendezentrum Bühne (Saal X 07) 39c3-c-t-uplink-digitale-souvernitt-sind-hcker-innen-jetzt-frs-staatswohl-verantwortlich de Live-Podcast Bühne Spätestens seitdem Donald Trump wieder im Weißen Haus sitzt, geistert die „Digitale Souveränität“ verstärkt durch die politischen Diskussionen. Wir haben mittlerweile ein Zentrum dafür (ZenDiS) und einen Fonds, der sich zur Agentur gemausert hat (Sovereign Tech Fund/Agency). Aber ist jetzt das Schlagwort Digitale Souveränität der Türöffner für mehr Open-Source-Software in Behörden, Verwaltungen, Schulen und anderen öffentlichen Einrichtungen, oder erweist sich das als Bumerang? Sind Big Tech, die doch viel in Linux und Open Source investieren, wirklich das Problem? In dieser Sonderfolge des c’t uplink blicken wir kritisch auf den Begriff Digitale Souveränität und diskutieren, welche Konzepte sich dahinter verbergen. Wir sprechen darüber, ob und warum gerade die Community den Karren aus dem Dreck ziehen soll. Außerdem schauen wir, warum es nur so langsam vorwärts geht mit freier Software in öffentlicher Hand und welche Lösungswege es gibt oder geben könnte. Gäste (u.a.): - Anne Roth, Referentin Digitalpolitik im Bundestag - Bonnie Mehring, Senior-Projekt-Managerin Free Software Foundation Europe - Sven Neuhaus, Tech Lead Open-Source-Produkte, Zentrum Digitale Souveränität https://pretalx.c3voc.de/media/39c3-sendezentrum/submissions/Y99YJ7/Podcast_uplink_16_9_7F22NMv.jpg Keywan Tonekaboni | c’t uplink https://events.ccc.de/congress/2025/hub/event/detail/c-t-uplink-digitale-souvernitt-sind-hcker-innen-jetzt-frs-staatswohl-verantwortlich https://pretalx.c3voc.de/39c3-sendezentrum/talk/Y99YJ7/ https://pretalx.c3voc.de/39c3-sendezentrum/talk/Y99YJ7/feedback/ false 2025-12-27T17:15:00+01:00 17:15 00:45 Sendezentrum Bühne (Saal X 07) 39c3-och-menno-it-und-it-security-uppsis de Live-Podcast Bühne Willkommen zum inkompetenten Podcast mit der besonderen Folge zur Inkompetenz in der IT und IT Security. Warum ist das Password Louvre schlecht ? Wie läuft die Cloud Transformation richtig schlecht ? Eine kleine Show der Pleiten, Pech und Pannen. Und für die Besucher des Talks über Uboote letztes Jahr gibt es noch einen kleinen Ausflug in die Welt der ultrakomprimierten Daten, oder die Server formaly known als TITAN Steuersystem. Ein kleiner Rundflug über die besten Fails der letzten Jahre. Sven Uckermann https://events.ccc.de/congress/2025/hub/event/detail/och-menno-it-und-it-security-uppsis https://pretalx.c3voc.de/39c3-sendezentrum/talk/WD3PZB/ https://pretalx.c3voc.de/39c3-sendezentrum/talk/WD3PZB/feedback/ false 2025-12-27T18:15:00+01:00 18:15 00:45 Sendezentrum Bühne (Saal X 07) 39c3-eine-typisch-sterreichische-lsung-die-dirndlkoalition de Live-Podcast Bühne Nach den längsten Koalitionsverhandlungen in der zweiten Republik kämpft die Dirndlkoalition gegen Inflation, Budgetdefizit und rechte Volkskanzlerfantasien. Wir geben einen Überblick zum politischen Jahr in Österreich. Am Beginn des Jahres wollte Herbert Kickl noch Volkskanzler werden, am Ende des Jahres regiert eine Dreierkoalition in Österreich. Wie gewohnt wollen wir auch heuer wieder erzählen, was in der österreichischen Innenpolitik passiert, der Humor soll dabei nicht zu kurz kommen. unsösterreichts.jetzt Alexander Muigg https://events.ccc.de/congress/2025/hub/event/detail/eine-typisch-sterreichische-lsung-die-dirndlkoalition https://pretalx.c3voc.de/39c3-sendezentrum/talk/BVL9NP/ https://pretalx.c3voc.de/39c3-sendezentrum/talk/BVL9NP/feedback/ false 2025-12-27T19:15:00+01:00 19:15 00:45 Sendezentrum Bühne (Saal X 07) 39c3-die-sicherheits_lucke-live-vom-39c3-ein-tag-mit-de de Live-Podcast Bühne Die **Sicherheits_lücke** (https://sicherheitsluecke.fm) greift aktuelle Ereignisse und Trends der Cybersecurity auf. Im Podcast werden die Themen - gerne auch mal humoristisch, sarkastisch oder selbstironisch - von Volker Skwarek, Monina Schwarz und Ingo Timm mit Tiefgang aufbereitet. Mit dem Format **live** ist der Podcast auch regelmäßig auf Kongressen zu finden und diskutiert interessante Vorträge mit ausgewählten Gästen. Wir berichten mit Gästinnen von der Gesellschaft für Informatik über interessante Vorträge und Erlebnisse vom ersten Tag des 39c3. https://pretalx.c3voc.de/media/39c3-sendezentrum/submissions/WYT8DR/HOOU_Cover-Sicherheitsluec_UFVsIk4.webp Volker https://events.ccc.de/congress/2025/hub/event/detail/die-sicherheits_lucke-live-vom-39c3-ein-tag-mit-de https://pretalx.c3voc.de/39c3-sendezentrum/talk/WYT8DR/ https://pretalx.c3voc.de/39c3-sendezentrum/talk/WYT8DR/feedback/ false 2025-12-27T20:30:00+01:00 20:30 01:30 Sendezentrum Bühne (Saal X 07) 39c3-landtagsrevue-live de Live-Podcast Bühne (lang) Live-Sonderausgabe der Landtagsrevue - dem Landespolitik-Ableger der Parlamentsrevue. Wir schauen zurück auf das erste Jahr der Landtagsrevue und beantworten eure Fragen rund um die Parlamente - wie funktioniert das eigentlich alles? Wo können wir als Zivilgesellschaft am besten Einfluss nehmen? Wer sind all diese Leute?? Schickt uns eure Fragen gern vorab an landtag@parlamentsrevue.de - so können wir auch Antworten aus den Ländern mitbringen, die nicht live dabei sind. Sabrina Lukas (veti) Karo https://events.ccc.de/congress/2025/hub/event/detail/landtagsrevue-live https://pretalx.c3voc.de/39c3-sendezentrum/talk/AEJYVK/ https://pretalx.c3voc.de/39c3-sendezentrum/talk/AEJYVK/feedback/ false 2025-12-27T11:15:00+01:00 11:15 01:00 Stonewall IO (Saal Y 06) 39c3-lets-talk-entspannt-neue-kontakte-knupfen de Workshop Du möchtest auf dem 39C3 neue Leute kennenlernen? In entspannter Runde erhältst du praktische Tipps für den Einstieg und spannende Gespräche. Willkommen sind alle – egal, ob schüchtern oder gesprächig! Offen für: FLINTA Auf den ersten Blick sind Veranstaltungen wie der 39C3 eine super Gelegenheit, Gleichgesinnte kennenzulernen und den eigenen Freundeskreis zu erweitern. In der Praxis ist das aber oft gar nicht so einfach, wie es klingt. Vielleicht habt ihr euch auch schon einmal gefragt: - Ist es eigentlich okay, andere einfach so anzusprechen? - Mit welchen Fragen gelingt der Gesprächseinstieg? - Wie bleibt ein Gespräch für beide Seiten interessant? In diesem Workshop verfolgen wir zwei Ziele: 1. Ihr lernt euch in lockerer Atmosphäre untereinander kennen und habt somit schon einmal ein paar bekannte Gesichter auf dem Kongress dazugewonnen. 2. Ihr bekommt praktisches Handwerkszeug, das es euch erleichtert, auf dem Kongress (und darüber hinaus) Gespräche mit euch unbekannten Personen zu starten und zu führen. Und natürlich soll der Spaß dabei nicht zu kurz kommen! Egal, ob ihr eher schüchtern oder extrovertiert seid – bei diesem Workshop seid ihr herzlich willkommen. Offen für: FLINTA Gigi https://events.ccc.de/congress/2025/hub/event/detail/lets-talk-entspannt-neue-kontakte-knupfen https://pretalx.c3voc.de/39c3-haecksen-workshops-2025/talk/9CXV8W/ https://pretalx.c3voc.de/39c3-haecksen-workshops-2025/talk/9CXV8W/feedback/ true 2025-12-27T12:30:00+01:00 12:30 01:00 Stonewall IO (Saal Y 06) 39c3-wahlt-diesen-workshop-ein-interaktiver-streifzug-d de Workshop Wie wählt man zwischen mehreren Optionen? Und zwar so, dass danach möglichst viele Leute zufrieden mit dem Ergebnis sind? Es gibt mehr Möglichkeiten als nur "die Option mit den meisten Stimmen gewinnt". Wir möchten möglichst viele davon mit euch ausprobieren! Welche Wahlsysteme gibt es überhaupt so, und wo werden sie üblicherweise eingesetzt? Welche Vor- und Nachteile haben sie, und gibt es "ein bestes"? Wir werden verschiedene Wahlsysteme ausprobieren und diskutieren, wie sehr sie uns zufrieden stellen und für welche Einsatzgebiete sie geeignet sind. Dazu gibt es Fun Facts und mathematische Hintergründe. Und was bedeutet das alles für euch in der Praxis, wenn ihr zum Beispiel in eurem Hackspace einen Vorstand wählen wollt? blinry Piko https://events.ccc.de/congress/2025/hub/event/detail/wahlt-diesen-workshop-ein-interaktiver-streifzug-d https://pretalx.c3voc.de/39c3-haecksen-workshops-2025/talk/GQS8WK/ https://pretalx.c3voc.de/39c3-haecksen-workshops-2025/talk/GQS8WK/feedback/ true 2025-12-27T13:45:00+01:00 13:45 01:30 Stonewall IO (Saal Y 06) 39c3-flinta-neurodivergenz-meetup de Workshop long EN below FLINTA\*-Workshop zu Neurodivergenz im Chaos: Austausch, gegenseitige Unterstützung und drei Themenrunden zu allem, was euch bewegt. Safe Space für ADHS, Autismus & Co – bringt eure Themen mit, ohne Diagnose, ohne Druck, ganz im eigenen Tempo. - - - FLINTA\*-Workshop on Neurodivergence in the chaos community: Exchange, mutual support, and discussion rounds about whatever is on your mind. A safe space for ADHD, autism & Co - bring your own topics, no diagnosis required, no pressure, at your own pace. **If needed, the session can be led in English, and English-speaking discussion groups can be formed.** EN description below ### System overload? Executive dysfunction in progress? Willkommen im Chaos! Dieser Workshop ist für alle neurodivergenten FLINTA\* (Frauen, Lesben, inter, nicht-binäre, trans und agender Personen). Gemeinsam schaffen wir Raum für Austausch, gegenseitige Unterstützung und Sichtbarkeit neurodiverser Erfahrungen – von ADHS über Autismus bis Tourette und darüber hinaus. Wir starten mit einer kurzen Vorstellungsrunde, sammeln gemeinsam Themen und tauchen dann in zwei aufeinanderfolgende Kleingruppenphasen à 30 Minuten ein. So kannst du zu mehreren Themen reinspringen, dich austauschen, zuhören oder einfach dabeisein. Bringt gerne eure eigenen Themen, Fragen oder Gedanken mit – alles, was euch bewegt, hat hier Platz. Wenn ihr nach den 2h noch in Gesprächen vertieft seid, könnt ihr es euch in der Haecksen Assembly neben dem Workshopraum gemütlich machen - ganz ohne Zeitlimit, ganz im eigenen Tempo Dieser Workshop ist ein Safe Space für FLINTA\* , um neurodivergente Erfahrungen aus dieser Perspektive zu teilen, neues zu lernen und sich gegenseitig zu stärken. Keine Diagnose nötig, kein Druck: Wenn die Zeitblindheit kickt oder das Chaos zu viel wird – komm später, geh früher, alles okay! - - - System overload? Executive dysfunction in progress? Welcome to the chaos! This workshop is for all neurodivergent FLINTA* individuals (women, lesbians, intersex, non-binary, trans, and agender people). Together we'll create space for exchange, mutual support, and visibility of neurodiverse experiences - from ADHD to autism to Tourette's and beyond. We'll start with a brief round of introductions, gather some topics, and then dive into two consecutive small group sessions of 30 minutes each. This way you can jump into multiple topics, share experiences, listen, or simply be present. Feel free to bring your own topics, questions, or thoughts - whatever is currently on your mind. If you're still deep in conversation after the 90 minutes are over, you're welcome to continue in the Haecksen Assembly next to the workshop room without any time limit, completely at your own pace. This is a safe space for FLINTA* folks to share neurodivergent experiences from this perspective, learn new things, and support each other. No diagnosis required, no pressure: If time blindness kicks in or the chaos gets overwhelming, feel free to come late or leave early, whatever works for you! Tschotsch https://events.ccc.de/congress/2025/hub/event/detail/flinta-neurodivergenz-meetup https://pretalx.c3voc.de/39c3-haecksen-workshops-2025/talk/TTX83E/ https://pretalx.c3voc.de/39c3-haecksen-workshops-2025/talk/TTX83E/feedback/ true 2025-12-27T15:45:00+01:00 15:45 01:00 Stonewall IO (Saal Y 06) 39c3-werde-teil-der-endof10-kampagne-hilf-menschen-beim de Workshop Aufgrund des Supportendes von Windows 10, zielt die endof10-Kampagne darauf ab, Unterstützungsnetzwerke aufzubauen, um Menschen beim Umstieg auf Linux zu unterstützen. Aber wie können die betroffenen Menschen erreicht werden, die vielleicht noch nie von Linux gehört haben? Mit Linux können Computer, die nicht die Hardware - Voraussetzungen für Windows 11 erfüllen, noch lange sicher weiter betrieben werden. In einer kurzen Einführung von ca. 20 Minuten, möchte ich meinen Weg beschreiben, wie ich mich immer mehr in der Endof10-Kampagne engagiert habe, obwohl ich keine Linux-Expertin bin. Ich möchte meine Erfahrungen mit dem Organisieren von Linux-Veranstaltungen in Berlin mit euch teilen und darüber sprechen, wie mein Netzwerk immer mehr gewachsen ist. Für den Umstieg auf Linux richte ich mich mit meinen Unterstützungsangeboten hauptsächlich an ältere, aufgeschlossene Menschen. Diese leben entweder in meiner Nachbarschaft oder sind in politischen Gruppen aktiv. Es gibt auch eine Kooperation mit dem Technikmuseum in Berlin, wo wir einmal im Monat ein Linux-Café anbieten. Anschließend möchte ich euch einladen, Ideen und Erfahrungen darüber auszutauschen, wie auch ihr Teil dieses globalen Graswurzel Unterstützungsnetzwerks werden könnt (falls ihr nicht schon dabei seid). Wichtig ist dabei lediglich, dass euch das Thema wichtig ist (z.B wegen Vermeidung von Elektroschrott oder Unabhängigkeit von Microsoft). Jede Person hat etwas, das sie beitragen kann. FLINTA-Only. Die Unterstützungsstrukturen sind bisher stark männlich geprägt. Über mehr Sichtbarkeit von FLINTA-Personen in diesem Bereich würde ich mich freuen. Bettina Louis https://events.ccc.de/congress/2025/hub/event/detail/werde-teil-der-endof10-kampagne-hilf-menschen-beim https://pretalx.c3voc.de/39c3-haecksen-workshops-2025/talk/VNYBYP/ https://pretalx.c3voc.de/39c3-haecksen-workshops-2025/talk/VNYBYP/feedback/ true 2025-12-27T17:00:00+01:00 17:00 02:00 Stonewall IO (Saal Y 06) 39c3-3-in-1-crafting-workshop-hakeln-sticken-und-strick de Workshop long Drei Handarbeits-Workshops finden zeitgleich statt! **Häkeln:** Im Workshop wir eine Tampon-förmige Baumwollhülle gehäkelt, in der ein (verpackter) Tampon Platz hat und transportiert werden kann. **Sticken:** Wir treffen uns in entspannter Runde, um gemeinsam Kreuzstich zu lernen und zu sticken. Keine Vorerfahrung erforderlich! Kits, Nähmaterial und Vorlagen mit bunten chaosnahen Motiven sind vorhanden. Kommt gerne auch mit euren eigenen Projekten und setzt euch dazu :3 **Stricken:** Stricktreffen für Anfänger\*innen und alle, die ein paar Maschen beim 39c3 stricken wollen und Ihre Skills weitergeben wollen. Knitting gathering for beginners and everyone else interested in knitting a few stitches at 39c3, and sharing their skills with beginners. **Häkeln mit anma** Häkel Deine eigene Tampon-Hülle, die praktischer Weise auch Tampon-förmig ist und am Rucksack getragen oder schwungvoll durch die Luft gewirbelt nicht nur ein fantastischer Gesprächsstarter ist, sondern auch ein Statement gegen die Tabuisierung der Menstruation. Ob für Dich selbst, als Geschenk oder als origineller Anhänger für den Weihnachtsbaum oder Osterstrauß - die Einsatzmöglichkeiten sind endlos. Wir verwenden einfaches Baumwollgarn in passenden Farben: klassisch weiß oder natur bis hin zu Rottönen für den "Used look". Häkelkenntnisse sind von Vorteil, aber nicht zwingend erforderlich. Der Workshop ist für alle interessierten Personen offen. --- **Sticken mit rhandos** Wir treffen uns in entspannter Runde, um gemeinsam Kreuzstich zu lernen und zu sticken. Keine Vorerfahrung erforderlich! Ich bringe Kits, Nähmaterial und Vorlagen mit bunten chaosnahen Motiven mit. Kommt gerne auch mit euren eigenen Projekten und setzt euch dazu :3 Eine Liste der Motive findet ihr hier: https://git.hamburg.ccc.de/rhandos/crossstitch-patterns Ich bringe genug Kits für alle mit. Wenn ihr außerhalb des Workshops ein Kit (mit Stoff, Nadel, Vorlage und Garn) zum Selbstkostenpreis reservieren wollt, schreibt mich gerne unter Angabe des Motivs an. --- **Stricken/Knitting mit Sarah** Ich möchte einen Strickworkshop / ein Stricktreffen für Anfänger\*innen und alle, die ein paar Maschen beim 39c3 stricken wollen und Ihre Skills weitergeben wollen, anbieten. Stricken ist eine tolle Fertigkeit, die Du Dir am besten "learning by doing" mit anderen zusammen aneignen kannst. Anfänger\*innen könnten sofort einige Grundlagen lernen oder über Projektideen sprechen. Falls Interesse besteht, können wir über das upcycling alter Pullover(garne) sprechen. I would like to offer a knitting workshop / gathering for beginners and everyone else interested in knitting a few stitches at 39c3, and sharing their skills with beginners. I think knitting it is a wonderful skill best to be learned by doing and face to face. Beginners could learn some basics straight away, or talk about project ideas. If there is anyone interested in talking about the re-use / upcycling of old sweaters & sweater yarn, we could also do that. rhandos anma Sarah https://events.ccc.de/congress/2025/hub/event/detail/3-in-1-crafting-workshop-hakeln-sticken-und-strick https://pretalx.c3voc.de/39c3-haecksen-workshops-2025/talk/JMQVG3/ https://pretalx.c3voc.de/39c3-haecksen-workshops-2025/talk/JMQVG3/feedback/ true 2025-12-27T19:30:00+01:00 19:30 01:00 Stonewall IO (Saal Y 06) 39c3-transmasc-meetup en Workshop Hi, I'm Li0n. I'm transmasc, and I'd really like to meet more nerdy transmascs. if you feel the same way, please come say hi. Hi, I'm Li0n. I'm transmasc, and I'd really like to meet more nerdy transmascs. if you feel the same way, please come say hi. we transmascs can be quite invisible sometimes, each walking around as individuals, never finding each other, always having to figure things out by ourselves. I would like to make a change to that and build solidarity and support between transmascs in the CCC community. Li0n https://events.ccc.de/congress/2025/hub/event/detail/transmasc-meetup https://pretalx.c3voc.de/39c3-haecksen-workshops-2025/talk/Q3GKFY/ https://pretalx.c3voc.de/39c3-haecksen-workshops-2025/talk/Q3GKFY/feedback/ true 2025-12-27T20:45:00+01:00 20:45 01:00 Stonewall IO (Saal Y 06) 39c3-trans-austauschrunde de Workshop Austauschrunde über Freud und Leid der Transition und allen Themen, die euch drumherum beschäftigen. Nicht cis Personen only, d. h. offen für TINA (trans, inter, non-binary, agender). Nicht cis Personen only Der Weg der Transition ist für jede*n sehr individuell und trotzdem gibt es viele Überschneidungen. Mensch bemerkt die ersten Veränderungen und kann diese nicht einordnen oder bekommt eine Ablehnung oder Zusage von der Krankenkasse. Erzähl uns von deinen Erfahrungen, denn hier findest du Leute, die ähnliche Erlebnisse oder Erfahrungen gemacht haben. Eventuell standen diese vor einem ähnlichen Problem und wissen, wie es weiter gehen kann oder du willst einfach deine aktuelle Freude teilen. Lass uns austauschen, denn gemeinsam sind wir stärker. Wie letztes Jahr, sollen am Anfang kurz Themencluster gefunden und dann in kleineren Gruppen an Tischen weiter bearbeitet, diskutiert oder sich gegenseitig damit geholfen werden. Das Ganze findet dann in drei Runden á 15 min statt, damit die Teilnehmenden die Möglichkeit haben, über mehrere Themen zu reden. captain-maramo https://events.ccc.de/congress/2025/hub/event/detail/trans-austauschrunde https://pretalx.c3voc.de/39c3-haecksen-workshops-2025/talk/YCALV8/ https://pretalx.c3voc.de/39c3-haecksen-workshops-2025/talk/YCALV8/feedback/ true 2025-12-27T22:00:00+01:00 22:00 02:00 Stonewall IO (Saal Y 06) 39c3-payload-picnic de Evening Event (open end) FLINTA in IT Security. No matter your background or skill level, you’re welcome to join, learn, and exchange in a supportive, judgement-free space. The event is open-ended: we’ll bring the cookies, you bring your curiosity. This is a FLINTA only security meetup. We had one at 38c3 as well. It is organised by noctiluca and katalyst. neither of us are speakers as such, it is more of a gathering. We will discuss security themes that are decided by the participants. It is an informal meetup katalyst noctiluca https://events.ccc.de/congress/2025/hub/event/detail/payload-picnic https://pretalx.c3voc.de/39c3-haecksen-workshops-2025/talk/QQ7AAM/ https://pretalx.c3voc.de/39c3-haecksen-workshops-2025/talk/QQ7AAM/feedback/ true 2025-12-27T20:00:00+01:00 20:00 01:00 Art & Play: Bus Stage 39c3-noisy-improvised-concert-on-analogdigital-modular- other **Artist: ΠXL** **Genre: Performance** Improvisierte elektronische Musik auf einem hybriden Setup, bestehend aus einem kleinen modularen System und digitalen Komponenten, die in Pure Data programmiert sind. Der Fokus liegt auf der musikalischen Erforschung roher elektronischer Klänge ohne den Einsatz von Echo, Hall oder Loopern. Auch wenn es rhythmische Momente geben mag, stehen diese nicht im Mittelpunkt, ebenso wenig wie Harmonie und Melodie – vielmehr sind technische/mathematische Strukturen die Ausgangspunkte. Die ästhetische Anziehungskraft entsteht durch die Akzeptanz des Klangmoments als kognitive Erfahrung und die gemeinsame Wahrnehmung eines Spannungsbogens durch Publikum und Performer*in. Improvised electronic music on a hybrid setup consisting of a small modular system and digital components programmed in Pure Data. The focus is on the musical exploration of raw electronic sounds without the use of echoes, reverb, or loopers. Even though there may be rhythmic moments, these are not the focus, nor are harmony and melody—rather, technical/mathematical structures are the starting points. The aesthetic appeal arises from the acceptance of the sound moment as a cognitive experience and the shared perception of a tension arc by the audience and performer. #### Artist Bio: i am an electronic/experimental musician, composer, improviser, programmer based in leipzig/germany. after more than 3 decades as a professional musician and instrumental teacher in various styles and on various traditional instruments, i have become a little bored and saturated with it. in addition, i have felt the desire to devote my life to other tasks such as left wing political, activist work and exploring the social space. therefore i have decided to stop making traditional music and to focus musically on improvisation and electronic sound generation. this allows me to combine some strong interests - for example, exploring sounds, computer programming, electronic tinkering - and use them for my artistic work. i play live with a small modular system as well as with self-developed digital, computer-based instruments and controllers. in addition to ensemble improvisation, i am increasingly interested in solo performances. through my long time as a wind instrumentalist i have become accustomed to always using my breath for articulation and dynamic control. that's why i usually use a breath controller for my electronic performances. in this concert i expect to use an eurorack-modular in combination with pure data & supercollider https://events.ccc.de/congress/2025/hub/https://usercontent.events.ccc.de/congress/2025/hub/usercontent/e/ba338e686236/1120-700-max.jpg Marty https://events.ccc.de/congress/2025/hub/event/detail/noisy-improvised-concert-on-analogdigital-modular- false 2025-12-27T11:00:00+01:00 11:00 00:10 CDC Triangle 39c3-intro-to-the-critical-decentralization-cluster en Talk Welcome and presentation of the CDC. Diego Salazar https://events.ccc.de/congress/2025/hub/event/detail/intro-to-the-critical-decentralization-cluster https://pretalx.riat.at/39c3/talk/Z9FEAG/ false 2025-12-27T11:10:00+01:00 11:10 00:40 CDC Triangle 39c3-the-cdc-badge-conference-badge-devboard-with-tropi en Talk Electronic hacker badge for the Critical Decentralization Cluster, featuring the TROPIC01 secure element with an ESP32-S3 microcontroller. Meant to be used for workshops and prototyping. It can also be worn as a mobile badge. Features an e-paper display with frontlight, a JST connector for single-cell LiPo batteries and a 12-button keypad. Designed with KiCad and released as open-hardware. https://github.com/riatlabs/cdc-badge dllud Pavel Polach bobotronic https://events.ccc.de/congress/2025/hub/event/detail/the-cdc-badge-conference-badge-devboard-with-tropi https://pretalx.riat.at/39c3/talk/TJXALG/ false 2025-12-27T12:00:00+01:00 12:00 02:00 CDC Triangle 39c3-openpgp-2025-zero-hero en Workshop Learn modern OpenPGP with the new RFC 9580 and Sequoia’s sq CLI. In two hours you’ll generate a v6 certificate, create a revocation cert, and practice daily ops: encrypt/decrypt, sign/verify, and publish via WKD/keyservers. We’ll cover Web-of-Trust basics (link vs vouch, trusted introducers, approvals) and note a GnuPG/v4 compatibility path. Optional: quick smart-card demo. Bring: laptop with terminal, email address; Sequoia sq preferred. darko https://events.ccc.de/congress/2025/hub/event/detail/openpgp-2025-zero-hero https://pretalx.riat.at/39c3/talk/FGHX77/ false 2025-12-27T14:00:00+01:00 14:00 00:30 CDC Triangle 39c3-whats-next-with-open-hardware-at-fossasia-and-beyo en Talk This session looks at where open hardware is heading, starting from recent ground up developments at FOSSASIA and extending to global trends across the open hardware community. With perspectives from FOSSASIA developers and open hardware experts, it explores decentralised collaboration, open silicon and firmware stacks, manufacturing realities, and how openness can be sustained at scale. In 2025, teams at FOSSASIA initiated several open hardware projects developed entirely from the ground up, including a new ARM based Pocket Science Lab, an updated LED Badge platform, and an NFC powered ePaper badge enabling energy independent content transfer. However, this session goes beyond a project update. It situates these developments within a wider global movement of open hardware initiatives across Asia, Europe, and other regions. Drawing on experiences from FOSSASIA as well as broader perspectives from the international open hardware community, the talk examines where open hardware is heading as a decentralised, collaborative practice. With input from international experts and community contributors, the session will explore trends emerging, including evolving manufacturing models, open silicon and firmware stacks, supply chain resilience, and the realities of sustaining openness at scale. Mario Behling https://events.ccc.de/congress/2025/hub/event/detail/whats-next-with-open-hardware-at-fossasia-and-beyo https://pretalx.riat.at/39c3/talk/ZPV3UT/ false 2025-12-27T14:30:00+01:00 14:30 02:00 CDC Triangle 39c3-seedsigner-diy-bitcoin-signing-device-build-worksh en Workshop Build your own open-source Bitcoin signing device with a Raspberry Pi Zero, camera and display! We have kits for 45€ Seedsigners are open-source DIY signing devices which can be built using "normal" hardware like a Raspberry Pi and act as kind of hardware wallets to sign Bitcoin transactions. Since the hardware is missing a secure element chip, the keys are saved externally, usually via self-drawn QR-codes which are read again for every use via the build-in camera. We brought a few kits with us which we sell for 45€ and build together. We will solder the 40pin GPIO header to the Raspberry Pi Zero, flashing the firmware on the MicroSD card and then build everything together in the 3d-printed enclosure. The kit includes: Raspberry Pi Zero 1.3 (without Wifi or Bluetooth chip), GPIO-header to solder Display-Hat with joystick and buttons Camera 64GB MicroSD card MicroUSB to USB-C cable 3D printed enclosure 6 printed templates for self-drawn QR-Codes https://pretalx.riat.at/media/39c3/submissions/MMHXLC/Make-Your-Own-Case_1pFeL4l.png freerk https://events.ccc.de/congress/2025/hub/event/detail/seedsigner-diy-bitcoin-signing-device-build-worksh https://pretalx.riat.at/39c3/talk/MMHXLC/ false 2025-12-27T16:30:00+01:00 16:30 01:00 CDC Triangle 39c3-software-liberation-toolbox-exchange en Workshop Free/libre software promotes users' rights, safeguards privacy, individual control over technology and fosters autonomy and decentralisation within our communities. In contrast, proprietary software limits user freedoms leading to centralised monopolies that often misuse their power to oppress and exploit. This imbalance can result in malware, degradation of privacy and service enshitification. Unfortunately, many remain unaware of the unjustices created by proprietary software, but increased awareness and shift towards free software can fuel resistance. Replacing of proprietary software is a crucial first step to liberate users, yet many need support to make this transition successfully. Workshops for system installation, repair centres and tech-savvy friends can offer essential assistance. However, what is the most effective way to offer this support? Which software should be recommended and how to engage the novice users while minimising the challenges associated with the transition? In this workshop we aim to discuss possible strategies of providing information on the path to software freedom. We will examine the installation process and ongoing use of free software within our circles. Key topics will include sparking interest in free distributions, selecting ideal software configuration, and exploring various forms of assistance during installation. Additionally, we'll address onboarding into the new system and troubleshooting potential issues. Finally, we hope to gather and share ideas on streamlining the process for everyone involved. Zebra https://events.ccc.de/congress/2025/hub/event/detail/software-liberation-toolbox-exchange https://pretalx.riat.at/39c3/talk/SZWNVV/ false 2025-12-27T17:30:00+01:00 17:30 00:30 CDC Triangle 39c3-update-2025-digital-integrity-of-the-human-person- en Talk The right to respect for digital integrity is an emerging right to protect people's digital lives. This talk will introduce this new legal concept, its possible implications for data protection and how this concept is being introduced in the current legal framework. The talk will also be an update of the implementation work with the adoption of the right in the Constitution of Geneva voted with 94% approval rate on the 18th of June 2023 and with 91% in Neuchâtel in November 2024. Zurich will be voting in November 2025. Every human evolves today in multi-dimensional physical and digital environment. If each individual is to keep its individuality and autonomy in its choices, it must be protected and given effective tools to defend its own autonomy. Recognizing that human life has been digitally extended must question ourselves on what makes us human today. Should personal data be considered as component of the person, rather than objects that can be owned by whoever collects that data? Should our digital integrity be protected? If each human person already has a right to physical and mental integrity (Swiss Constitution article 10 al.2), shouldn’t it have a right to digital integrity? Alexis Roussel has been co-authoring a book on the right to Digital Integrity. He is an advocate in digital public policies in Switzerland. Alexis Roussel https://events.ccc.de/congress/2025/hub/event/detail/update-2025-digital-integrity-of-the-human-person- https://pretalx.riat.at/39c3/talk/ENXTHG/ false 2025-12-27T18:30:00+01:00 18:30 00:30 CDC Triangle 39c3-the-mask-off-moment-for-digital-identity en Talk Digital identity is sold as a path to trust, inclusion, and "digital empowerment." In practice, it is a brittle control surface: a set of design choices that decide who is seen, who is excluded, and who can be targeted at scale. Born from a landmark research project, _The Digital Identity Event Horizon_, this talk describes the 2025 "mask-off moment" for digital identity: the point where multiple comforting narratives collapse and the core use of identity systems as population-management infrastructure becomes hard to deny. Using short vignettes from New Design Congress case-study work (Estonia, the US, Australia, Gaza, and others), it shows how ambiguity, vendor incentives, and governance theatre turn identity into fraud-permissive, coercion-ready infrastructure In response to this decline, this talk concludes proposes a working model of the digital self as a socio-technical system with six properties: serialisation, custodianship, presentation, authentication, authorisation, and assetisation, and offers new framing and threat models to help understand how digital identity creates brittle societies. Despite decades of cryptography, security practice, and best practice deployment, digital identity remains the weakest link in systems design because its core terms stay vague while its consequences are concrete. What does it actually take to assemble a digital identity? What do different implementations share, even when they claim to be radically different? And what happens when those definitions are left elastic enough to serve whoever holds power? "The mask-off moment" tracks the convergence of capability (biometrics, sensors, AI triage, mass digitisation), institutional incentives (risk scoring, eligibility gates, compliance automation), and political will. The result is an emerging form of bureaucratic violence we are not prepared to name, much less govern. This talk traces how digital identity became weapon-ready through optimistic framing and opportunistic ambiguity, then offers a concrete frame to interrogate any proposal: what it will do on its best day, what it will do on its worst day, and which parts of the system will be impossible to “add accountability to later.” The intended audience is policymakers, technologists, designers, and civil-society people who are tired of vague promises and want a usable model that survives contact with reality. https://pretalx.riat.at/media/39c3/submissions/ZPSSNE/ndc_digital_identity-lq_G7MC1GU.png Cade Diehm https://events.ccc.de/congress/2025/hub/event/detail/the-mask-off-moment-for-digital-identity https://pretalx.riat.at/39c3/talk/ZPSSNE/ false 2025-12-27T19:00:00+01:00 19:00 00:30 CDC Triangle 39c3-breaking-into-wireless-smart-homes-z-wave-example en Talk This talk will cover Z-Wave (an a bit of Zigbee and Matter) security mechanisms as well as different attack vectors on a Z-Wave network and describe how the protocol evolved to mitigate those threats. Many smart homes are still vulnerable to the described attacks. You will learn: - security mechanisms and algorithms used in modern IoT smart home and smart building protocols and how they evolved, - various ways to break existing Z-Wave networks (DDOS or key stealing during inclusion), - new features in Z-Wave and Z-Wave Long Range protocol closing the described holes, PoltoS https://events.ccc.de/congress/2025/hub/event/detail/breaking-into-wireless-smart-homes-z-wave-example https://pretalx.riat.at/39c3/talk/7EKHXA/ false 2025-12-27T19:30:00+01:00 19:30 00:30 CDC Triangle 39c3-namecoin-and-tor-pki-2025 en Talk Namecoin has been used in the wild for years as a TLS Public Key Infrastructure, and using Tor onion services with TLS has been nearing deployment as well. But what kinds of other PKI wizardry can we do with Namecoin and Tor? Topics to be covered include: * How we can use Namecoin as a PKI with ~0 bytes of blockchain overhead. * How Namecoin's smart contract functionality (allowing multisig and timelocks to control updating a name) interacts with PKI use cases. * How we generalized Namecoin and Tor PKI to work with non-TLS protocols. * How revocations can be handled securely. * How we ensured anonymity (including Tor stream isolation) despite TLS implementations not providing API's for this. * How the anonymity protections actually *improved* performance. * How all of the above interoperates with existing software. https://pretalx.riat.at/media/39c3/submissions/39LAUG/namecoin-coin_1j2egNh.svg Jeremy Rand https://events.ccc.de/congress/2025/hub/event/detail/namecoin-and-tor-pki-2025 https://pretalx.riat.at/39c3/talk/39LAUG/ false 2025-12-27T20:00:00+01:00 20:00 00:30 CDC Triangle 39c3-how-to-contribute-to-open-source-projects-stack-wa en Talk A walk-through of how to contribute to open source projects, with Stack Wallet, Monero, and Tor (Arti!) as examples. A quick guide to setting up development environments for each on Linux, macOS, and/or Windows, an update on where each project stands, and a list of big and small tasks to do for each. A "quickstart" guide for newcomers and a survey of outstanding TODOs for more experienced hands. Starting with Tor and The Tor Project's new Rust project Arti (A Rust Tor Implementation), we'll walk through how to build, set up for development, and submit Pull Requests which have a good chance of being accepted. We'll proceed to Monero development, both for the original C++ codebase as well as the newer Cuprate project, a Rust Monero implementation, and what's coming for both. Finally, we'll look at how Stack Wallet incorporates and provides a UX for both Tor and Monero. Joshua Babb https://events.ccc.de/congress/2025/hub/event/detail/how-to-contribute-to-open-source-projects-stack-wa https://pretalx.riat.at/39c3/talk/9MBKDN/ false 2025-12-27T20:30:00+01:00 20:30 02:00 CDC Triangle 39c3-what-can-a-mixnet-do-strategies-for-network-level- en Workshop This workshop will introduce mixnet technology as a tool to achieve network-level anonymity for internet traffic. We will see hands on how a mixnet works, where the idea came from, and discuss other strategies for protecting privacy online against state and corporate surveillance. Alexis Roussel Casey Ford https://events.ccc.de/congress/2025/hub/event/detail/what-can-a-mixnet-do-strategies-for-network-level- https://pretalx.riat.at/39c3/talk/TGC97J/ false 2025-12-27T11:00:00+01:00 11:00 03:00 House of Tea 39c3-welcome-to-the-house-of-tea-3 en, de other Join us to get things started and be part of our Pu'Er circles! <3 Whether it's your first Congress or you're a "regular", the House of Tea welcomes you! Come to share the vibe, to browse the amazing tea, to drink a cup or two, to help your neighbors, and take part of something wonderful! This first meeting is a good time to learn the basics of the functioning of the House of Tea and how to further participate in helping it run; or just to meet all the fantastic creatures who gravitate around it, and share some delicious tea! HouseOfTea https://events.ccc.de/congress/2025/hub/event/detail/welcome-to-the-house-of-tea-3 false 2025-12-27T16:00:00+01:00 16:00 01:00 House of Tea 39c3-house-of-tea-reunion en, de other Gathering of people, who feel connected to the House of Tea. Something between community building, seeing old friends, making new friends, getting to know the beings behind social media handles, discussing what to do in the next days, conspiring, laughing and so on. AdeptVeritatis https://events.ccc.de/congress/2025/hub/event/detail/house-of-tea-reunion false 2025-12-27T17:30:00+01:00 17:30 02:00 House of Tea 39c3-wekillleaks-version-09-launch-presentation-and-pla en other WEKILL//LEAKS is a 2-player card game of Courageous Publishing and Imperialist Sh!tf#ckery. Whether you want to side with Power or with Courage… WEKILL//LEAKS is a game for you! Come discover "version 0.9" for its launch, a playtest and discussion! WEKILL//LEAKS is a 2-player card game. Have you ever dreamt of running THE EMPIRE? Of limitlessly expanding your economic, political and military power through the World at any cost, including through war and deception? Do you have what it takes to crush your political opponents – those who disagree with your methods and want to expose them – in order to impose your warmongering agenda? Or have you ever dreamt of organizing THE LEAK? Of leading data-driven journalism online into the future? Will you be capable of combining the powers of digital technologies and investigative journalism to expose the crimes and lies of the Empire? To give everyone the power to understand the World they live in, and act upon it? Whether you want to side with Power or with Courage… WEKILL//LEAKS is a game for you! Each player choses to play either as “The Empire” or as a mysterious organisation called “The Leak”. This is the release of "version 0.9", as the game is currently in pre-final-stage of testing and fine-tuning. Come join to discover the game, discuss its design and playtest it! The glossy box-set contains the following: - 2 Decks of 40 illustrated color cards, made of prime 330g/m² coated “casino-grade” black-core cardboard - 1 Score-keeping card - 1 Color manual - 3 Laser-cut tokens for score-keeping You can also get your own copy of the game, and support the project financially directly, or on https://opencollective.com/dissent-and-datalove More information about the project: https://dissent-and-datalove.institute/artworks/wkl/ https://events.ccc.de/congress/2025/hub/https://usercontent.events.ccc.de/congress/2025/hub/usercontent/e/e08302846659/s_closeup_cards_empire_wkl_v09.jpg HouseOfTea https://events.ccc.de/congress/2025/hub/event/detail/wekillleaks-version-09-launch-presentation-and-pla false 2025-12-27T20:30:00+01:00 20:30 00:30 House of Tea 39c3-the-spoon-game-39c3-special-edition-workshop-_vtbu en other "The Spoon Game" is an interactive workshop that challenges participants through a journey inspired by the CCC to enlighten you on a curious notion that will change your perspective on spoons for sure! Can you join the choir that sings only in modem beeps? Will you win the speed-typing competition on a reverse Dvorak keyboard? Will you be able to take part in the most chaotic but functional wiring competition? Seemingly trivial questions, but with surprising implications! To understand what connects these mysterious situations, come and discover "The Spoon Game", designed and hosted by Atypha. A workshop around a fascinating game that will change the way you see spoons forever! ⚠️ 7 people/session maximum to ensure a good workshop. Book you slot now: [https://urlr.me/t3DYx6](https://urlr.me/t3DYx6) [#Inclusion](https://events.ccc.de/congress/2025/hub/tag/Inclusion) [#accessibility](https://events.ccc.de/congress/2025/hub/tag/accessibility) https://events.ccc.de/congress/2025/hub/https://usercontent.events.ccc.de/congress/2025/hub/usercontent/e/32ed1f6c287d/Banner-3-The-Spoon-Game.png Atypha (She) https://events.ccc.de/congress/2025/hub/event/detail/the-spoon-game-39c3-special-edition-workshop-_vtbu false 2025-12-27T21:30:00+01:00 21:30 01:30 House of Tea 39c3-how-can-we-talk-about-palestine en other How can we speak up against war, express solidarity towards victims of war crimes and displacement, and organize across borders towards peace, while avoiding instrumentalized guilt and distractions? Bringing around the table (among others) perspectives from non-Germans on the specificities of the German context. How can we speak up against war, express solidarity towards victims of war crimes and displacement, and organize across borders towards peace, while avoiding instrumentalized guilt and distractions? Bringing around the table (among others) perspectives from non-Germans on the specificities of the German context. HouseOfTea https://events.ccc.de/congress/2025/hub/event/detail/how-can-we-talk-about-palestine false 2025-12-27T23:00:00+01:00 23:00 02:00 House of Tea 39c3-chaos-cannabis-cup en, de other Cannabis homegrowers meeting Cannabis homegrowers meeting Social sharing of Cannabis is still prohibited. But nobody can keep us from showing our harvest to each other, discussing it. No competition. No "cup". Just cozy get-together.\ Let's celebrate the survival of the partial legalization. Maybe we can realize a seed exchange. Bring along what you have left. sybb - show your best bud\ byow - bring your own weed matrix: [#chaos-cannabis-cup](https://events.ccc.de/congress/2025/hub/tag/chaos-cannabis-cup):tchncs.de AdeptVeritatis https://events.ccc.de/congress/2025/hub/event/detail/chaos-cannabis-cup false 2025-12-27T13:00:00+01:00 13:00 01:00 Saal 5 39c3-digital-rights-communities-meetup_mw76 en other A place for digital rights NGOs and activists to share their stories and network. Almost all of us have some connection to the topic, but we want to give you a chance to share what is going on in your country or city, how your fight for maintaining our digital rights looks like. You'll have the chance to share in a lightning-talk style what you or your organisation has been up to, no longer than 3 minutes, so bring your stories if you'd like. Afterwards we'll probably have plenty of topics to talk about, and continue over a Tschunk or two. Freedom Not Fear https://events.ccc.de/congress/2025/hub/event/detail/digital-rights-communities-meetup_mw76 false 2025-12-27T14:00:00+01:00 14:00 00:30 Saal 5 39c3-how-even-the-safest-places-arent-safe-from-cctvs en Short talk Historically as one of the safest countries in the world and a dictatorship its recent past, it's surprising how in Portugal, in a matter of 15 years had narrative around surveillance shift from skepticism to full endorsement across all large political parties. We'll cover how the GDPR screwed up privacy in Portugal and how the law effectively gags the data protection authority, among other outrageous examples. We'll share some of our initial efforts in a data analysis project to correlate public contracts with deployed surveillance systems and we welcome ideas / lessons from others who've engaged in similar initiatives. Francisco https://events.ccc.de/congress/2025/hub/event/detail/how-even-the-safest-places-arent-safe-from-cctvs https://fnf-39c3-pretalx.my-server.in/fnf-at-39c3-2025/talk/VGN8LP/ https://fnf-39c3-pretalx.my-server.in/fnf-at-39c3-2025/talk/VGN8LP/feedback/ false 2025-12-27T16:00:00+01:00 16:00 01:00 Saal 5 39c3-the-digital-identity-event-horizon en Talk Despite years of information security innovation, user safety continues to decay and digital systems remain vulnerable. The reason: most attacks exploit a flawed first principle of digital identity, built on entrenched assumptions about presentation, authentication, enforcement, and trust. As societies digitize and digital identity becomes the endpoint for all contact between citizens, institutions, and infrastructure, this collective failure to imagine new designs will shatter how we cultivate social trust. How else can this state of affairs, where no single attribute of a person can escape the reach of bad actors, be brought to an end? Drawing on unprecedented access to individuals across the digital identity landscape and organisations developing the next wave of identity solutions, The Digital Identity Event Horizon presents New Design Congress' analysis of the core emerging socio-technical threats inherent in all digital identity systems, and lays the case for why proposed solutions will not address these threats without radical rethinking. What happens when threat modelling becomes reality? This is the story of a research team caught in the mask-off moment for digital identity, documenting the technology's inherent dangers at the exact moment its weaponised design revealed itself. Over four years, New Design Congress conducted eight case studies across implementations ranging from national biometric schemes to Web3 zero-knowledge proofs. More than 45 participants, including law enforcement officers, military personnel, information security researchers, CEOs, and activists, spoke candidly about digital identity's failure modes. The resulting 600+ citations documented a fundamental problem: the Cartesian vulnerability. "I authenticate, therefore I am" - when proving identity becomes inseparable from possessing identity, social-engineering attacks become inevitable. When identity infrastructure becomes a single point of failure, it tears at the fabric of society itself. Since 2021, New Design Congress has applied adversarial security research methodology to the question of flawed digital identity: its definitions, implementations, and implications. From FaceID to BankID, from Facebook to the fediverse, from Worldcoin to the world's passports, this is an exhaustive study of the opportunities and risks that emerge from how we represent entities in the information age. At the centre is a core hypothesis: today's digital identities are inherently vulnerable to attack, and this leads to brittle digital societies. This talk presents the threats and findings for the first time. It is for anyone who still believes today's technologies can safely represent humans. The report it is based on, The Digital Identity Event Horizon, is a landmark adversarial study that names the concrete harms of digital identity directly, establishes a working definition, introduces a threat modeling framework for evaluating any scheme, and presents ten key findings and fourteen recommendations, with many immediately implementable across policy, design, and governance. The report will be soft-launched at https://newdesigncongress.org/en/report/2026/the-digital-identity-event-horizon. Cade Diehm https://events.ccc.de/congress/2025/hub/event/detail/the-digital-identity-event-horizon https://fnf-39c3-pretalx.my-server.in/fnf-at-39c3-2025/talk/DW8DSV/ https://fnf-39c3-pretalx.my-server.in/fnf-at-39c3-2025/talk/DW8DSV/feedback/ false 2025-12-27T17:30:00+01:00 17:30 01:00 Saal 5 39c3-mehr-privatsphare-fur-android-smartphones de Workshop Keine Vorkenntnisse erforderlich! Du möchtest Dein Android-Smartphone datenschutzfreundlicher machen? Ich zeige Dir was Du mit Deinem vorhanden Gerät dafür tun kannst. Im zweiten Teil gehe ich dann auf „googlefreie“ Android-Varianten (custom roms) und auf Linux-Smartphones ein. Keine Lust mehr, dass jede App genau weiß wo Du Dich gerade befindest? Keine Lust mehr personenbezogene Werbung zu erhalten, die eh nicht passt? Ich zeige Dir, welche Einstellungen Du an Deinem Android Smartphone vornehmen kannst, damit Du etwas weniger offenherzig mit Deinen Daten umgehst. Es sind keine Vorkenntnisse erforderlich. Wir starten mit ganz einfachen Schritten. Bei Bedarf helfe ich Dir. Im zweiten Teil geht es dann um sogenannte custom roms, die „entgoogled“ sind, wie IodéOS, GrapheneOS, etc. und eine kurzer Abstecher zu Linux-Smartphones. flysch https://events.ccc.de/congress/2025/hub/event/detail/mehr-privatsphare-fur-android-smartphones https://fnf-39c3-pretalx.my-server.in/fnf-at-39c3-2025/talk/RPE9VY/ https://fnf-39c3-pretalx.my-server.in/fnf-at-39c3-2025/talk/RPE9VY/feedback/ false 2025-12-27T19:00:00+01:00 19:00 00:25 Saal 5 39c3-die-un-cybercrime-konvention de Workshop Die UN-Cybercrime-Konvention ist ein völkerechtliches Abkommen, das in vieler Hinsicht das Gegenteil zu Menschenrechtskonventionen darstellt. Statt Menschen zu stärken, wird deren Überwachung, völkerrechtlich verpflichtend, in den Blick genommen. Klingt dystopisch? Ist es. Was hat sich da verdreht? Ist es wirklich so krass und schlimm? Und was lässt sich da machen? Nach einer kleinen Einführung aus dezidiert nicht-juristischer Perspektive wollen wir diskutieren, welche Auswirkungen von dem Papier zu erwarten sind, wie sich Einzelne und Staaten (so sie Willens sind), dagegen wehren können. Und natürlich, wie das Problem überhaupt bekannter gemacht werden kann. ulif https://events.ccc.de/congress/2025/hub/event/detail/die-un-cybercrime-konvention https://fnf-39c3-pretalx.my-server.in/fnf-at-39c3-2025/talk/C7QZSJ/ https://fnf-39c3-pretalx.my-server.in/fnf-at-39c3-2025/talk/C7QZSJ/feedback/ false 2025-12-27T20:30:00+01:00 20:30 01:00 Saal 5 39c3-more-privacy-for-android-smartphones en Workshop No prior knowledge required! Want to make your Android smartphone more privacy-friendly? I'll show you what you can do with your existing device. In the second part, I'll discuss ‘Google-free’ Android variants (custom ROMs) and Linux smartphones. Tired of every app knowing exactly where you are? Tired of receiving personalised advertising that doesn't suit you anyway? I'll show you which settings you can adjust on your Android smartphone so that you can be a little less open with your data. No prior knowledge is required. We'll start with some very simple steps. I'll help you if you need it. The second part will then cover so-called custom ROMs that are ‘de-Googled’, such as IodéOS, GrapheneOS, etc., and a brief detour to Linux smartphones. flysch https://events.ccc.de/congress/2025/hub/event/detail/more-privacy-for-android-smartphones https://fnf-39c3-pretalx.my-server.in/fnf-at-39c3-2025/talk/PGHF7D/ https://fnf-39c3-pretalx.my-server.in/fnf-at-39c3-2025/talk/PGHF7D/feedback/ false 2025-12-27T13:00:00+01:00 13:00 02:00 Chaoswellen Assembly 39c3-pota-parks-on-the-air-day-1 de, en other Introduction to Parks on the Air (POTA). POTA is an international radiosport award program that encourages licensed amateur radio operators to visit, enjoy and operate portable equipment in a variety of parks and public lands. POTA introduction "in a nutshell" followed by joint POTA activation on shortwave in the "Planten un Blomen" park right next to the CCH. We meet daily at 01:00 p.m. at the Assembly for a short introduction and then go out into the park together. The participants learn how to set up a portable shortwave station and get a crash course in shortwave operation. Then it's time to get on the air! Other radio amateurs around the world are waiting to contact us. Can you manage the 10 radio connections necessary for a successful "activation" of the park? NOTE: We meet AT THE CHAOSWELLE ASSEMBLY and start there with a short introduction to the POTA program. Then we go out into the park together. Dress warmly and weatherproof! We go outside even when it's raining or snowing! If anyone wants to join us later: radio amateurs can reach us in the park on 145.500 MHz FM. Our location in the park: [OpenStreetMap](https://www.openstreetmap.org/directions?engine=fossgis_osrm_foot&route=53.561346%2C9.986447%3B53.559593%2C9.986438#map=18/53.560490/9.986277) https://events.ccc.de/congress/2025/hub/https://usercontent.events.ccc.de/congress/2025/hub/usercontent/e/45ce2f713193/pota_banner_winter_2.jpg DK4HAA https://events.ccc.de/congress/2025/hub/event/detail/pota-parks-on-the-air-day-1 false 2025-12-27T17:10:00+01:00 17:10 00:20 Chaoswellen Assembly 39c3-sparkie de, en other How curiosity developed a good tool for antennas. and how you can do it too. Antennen aus dem 3D Drucker, und wie es dazu kam. eine kurze einfuerung in HF Voodoo und antennendesing. Ein show and tell. marco https://events.ccc.de/congress/2025/hub/event/detail/sparkie false 2025-12-27T17:30:00+01:00 17:30 00:20 Chaoswellen Assembly 39c3-amateurfunk-goes-politik-oder-wie-ich-das-overengi de other Emergency communications in amateur radio had not really attracted much attention in Berlin politics until now. In this short talk, I explain how I wanted to change that, how I probably overengineered things in the process, and whether anything came of it in the end—apart from some nice stamps. Tny https://events.ccc.de/congress/2025/hub/event/detail/amateurfunk-goes-politik-oder-wie-ich-das-overengi false 2025-12-27T11:00:00+01:00 11:00 01:00 Kidspace - Workshopraum 39c3-awareness-kids-formiert-euch de other Möchtest du uns unterstützen den Kidspace zu einem sicheren Wohlfühlort für Familien zu machen? Dann schließe dich dem Kidspace-Awareness-Team an. Das c3Awareness-Team wird uns auch in diesem Jahr mit reichlich Erfahrung zur Seite stehen. Wir freuen uns sehr auf deine Teilnahme. In einem Awareness-Team sind Menschen, die sich darum kümmern, dass es allen gut geht. Sie sind ansprechbar, wenn wer traurig ist, wenn es Streit gibt oder gab, wenn sich wer ausgegrenzt oder ungerecht behandelt fühlt. So ein Team im Kidspace, das wäre doch wunderbar! Und weil es der Kidspace ist, sollen das natürlich auch junge Menschen sein. Im Workshop schauen wir uns an, was ein Awareness-Team im Kidspace machen könnte, wie ihr als Teil dieses Teams mit konkreten Situationen umgehen könnt und wie ihr dabei gut auf euch achtet. Wir sprechen über Gefühle, Bedürfnisse, Ausgrenzung, Verschiedenheit und Geheimnisse. Wenn du zwischen 10 und 15 Jahren bist und Lust hast, beim Kidspace-Awareness-Team mitzumachen, komm zum Workshop :) Der Workshop findet gemeinsam mit Mitgliedern des c3Awareness-Teams der Gesamt-Veranstaltung und Menschen aus der Kidspace-Orga statt. ghenny und bunthörnchen als Teil des Kidspace werden das entstehende Awareness-Team begleiten und bei Bedarf ansprechbar sein. https://events.ccc.de/congress/2025/hub/event/detail/awareness-kids-formiert-euch false 2025-12-27T12:15:00+01:00 12:15 01:30 Kidspace - Workshopraum 39c3-lote-dein-39c3-pcb de other Wir, ein paar Menschen aus dem Umfeld des Chaostreffs des c3RE, haben zum 37c3 ein PCB in Form eines Getränkeuntersetzer im Congress-Design entworfen. Zunächst nur für uns und … ach komm… wir machen ein paar mehr.
 An Tag 0 waren alle PCBs weg! Zum 38c3 gab es nicht nur eine Neuauflage im aktuellen Design sondern auch noch eine Nachproduktion vom 37c3.
 An Tag 1 waren alle PCBs weg! Zum 39c3 gibt es nun die dritte Auflage - wieder im aktuellen Congress-Design, mit 3 Widerständen, einem MOSfet und 8 RGB LEDs wird das Ganze mit einem Wemos D1 Mini zu einem leuchtenden, blinkenden Erinnerungsstück an deinen (ersten?) Congress! Wir haben Lötstationen, helfende Hände aber leider nur begrenzt Platz und Zeit. Wir werden verschiedene Vorbereitungsstufen vorhalten so dass jede und jeder -unabhängig von der Löterfahrung- am Ende ein PCB zum leuchten bringen kann. Bitte meldet euch an damit wir planen können: kohlenpod@c3re.de Die Kosten für die Hardware inkl. Wemos betragen ca. 5€ - es wäre nett wenn ihr euch an den Kosten beteiligt - dies ist aber absolut kein Muss! P.S: wir haben auch noch eine kleine Menge an 37C3 und 38C3 PCBs nachbestellt - damit die Menschen die gerne sammeln die Chance haben alle PCBs zu bekommen. Die sind übrigens untereinander kompatibel und können gestapelt werden https://events.ccc.de/congress/2025/hub/https://usercontent.events.ccc.de/congress/2025/hub/usercontent/e/a1efd0d8b93c/39c3pcb.png https://events.ccc.de/congress/2025/hub/event/detail/lote-dein-39c3-pcb false 2025-12-27T14:15:00+01:00 14:15 01:00 Kidspace - Workshopraum 39c3-erste-hilfe_9yea other Der CERT erklärt, wie Erste Hilfe funktioniert. Im Erste-Hilfe-Kurs zeigen wir euch, wie man Pflaster bei sich oder anderen klebt, damit ihr kleinere Verletzungen selbst verarzten könnt. Wenn ihr schon älter seid oder mehr Erfahrung mitbringt, können wir uns zudem an Verbänden und der stabilen Seitenlage versuchen. Wichtig ist zudem, zu erkennen, wann jemand Hilfe braucht. Daher bringen wir auch ein Bilderrätsel mit. Mit den Bildern können wir mögliche Gefahren und Handlungen besprechen. Eine mögliche Handlung ist, einen Notruf abzusetzen. Daher werden wir dies mit euch üben. Zum Schluss werden wir schauen, was man mit Einmalhandschuhen noch so anstellen kann. https://events.ccc.de/congress/2025/hub/event/detail/erste-hilfe_9yea false 2025-12-27T15:30:00+01:00 15:30 01:00 Kidspace - Workshopraum 39c3-gemusemusik-mit-makey-makey de, en other Veggie music with Makey Makey Weird is wonderful! Crooked cucumbers, bent carrots, and limp potatoes are not only delicious, but also fun music controllers for earthy sounds. How does it work? You connect the vegetables to your computer, record weird and wonderful sounds using the vegetable keys, and use them to create your own beats. One of the most popular workshop at this year's Code Week Hamburg—come by and join us in making weird sounds from Krautrock to cable salad. https://events.ccc.de/congress/2025/hub/event/detail/gemusemusik-mit-makey-makey false 2025-12-27T16:45:00+01:00 16:45 01:00 Kidspace - Workshopraum 39c3-pimp-your-katzenohren de other Schnapp dir auch dieses Jahr wieder deine Katzenohren und verwandle dein Congress-Must-Have-Piece in einen wahren Hingucker! Are your cat ears not fancy enough yet? Come by and give them a fabulous upgrade. Don’t have any yet? This is your chance to grab the must-have accessory for every chaos event! I’ll bring a box full of 3D-printed cat ears (around 150 pieces) and loads of crafting supplies. ## What to Expect - Decorate your own cat ears with anything that sparkles, shines, or just looks awesome. - Exchange ideas and designs with others. - Feel free to bring your own cat ears if you have some! ## Participation **Who:** Anyone who loves crafting **Age:** Open to all ages **Materials:** Provided (while supplies last) – feel free to bring your own as well, donations welcome ## Duration The workshop lasts about 1 hour or as long as there are materials left. ghenny https://events.ccc.de/congress/2025/hub/event/detail/pimp-your-katzenohren false 2025-12-27T18:00:00+01:00 18:00 01:30 Kidspace - Workshopraum 39c3-linux-fur-einsteigerinnen-part-1 de other Wir begeben uns auf eine Entdeckungsreise durch Linux - von der Vielfalt eines Betriebssystems. Was ist (F)OSS? Wie sieht so ein Linux aus? Was kann man damit machen? Und kann man damit auch spielen? Wir wollen Linux für Schule und Freizeit zeigen, die Vorteile von freier OpenSource Software erklären, die Vielfalt der verfügbaren Programme und Tools sowie mit dem Vorurteil aufräumen, dass man zum Spielen dann ja doch immer Windows benötigt. Der Workshop soll an drei Tagen am Beispiel des Schulsticks durch die Vielfalt des Systems führen. Part 1: Einstieg Was ist Linux? Was freie Software? Was sind die Vorteile? Wie sieht so ein Linux aus? Welche Flavours gibt es? (Was) kann man damit alles machen? Und dann natürlich: Anwendungen wie z.B. Office, Grafikprogramme selber ausprobieren. Zielgruppe Dieser komplette Workshop ist für absolute Neulinge (Computer überhaupt und/oder Linux). Aber auch, wer schon Windows einsetzt und mal über den Tellerrand schauen will, vielleicht sogar schon einmal über einen Wechsel nachgedacht hat, sich aber (noch) nicht traut, ist herzlich willkommen! Voraussetzungen Interesse und Neugier. micu sylvia https://events.ccc.de/congress/2025/hub/event/detail/linux-fur-einsteigerinnen-part-1 false 2025-12-27T20:30:00+01:00 20:30 01:30 Kidspace - Workshopraum 39c3-austausch-fur-eltern-von-adhs-kindern de other Austausch für Eltern und Bezugspersonen von Kindern mit ADHS und/oder Autist*innen Ich (bunthoernchen) möchte einen Raum schaffen in dem Fragen gestellt werden dürfen, und wir uns gegenseitig unterstützen können. Netzwerke schaffen und so… Willkommen sind alle, die die Verantwortung für Kinder haben, die sich auf dem neurodivergenten Spektrum bewegen, oder zumindest eine Vermutung haben (Diagnose ist keine Pflicht). Zu mir: Ich bin Mama von drei ADHS-Hörnchen und bin selbst Autisty mit ADHS. Ich habe mir viel Wissen angeeignet, das ich gerne weitergebe. Ich bin KEINE psyhotherapeutische Fachperson. https://events.ccc.de/congress/2025/hub/event/detail/austausch-fur-eltern-von-adhs-kindern false 2025-12-27T12:15:00+01:00 12:15 01:30 Kidspace - Hackcenter 39c3-minecraft-education-beginner-workshop-6 de other Lerne Minecraft in Ruhe kennen und stelle deine Fragen. An educational introduction to the popular computer game with Minecraft Education. Have you always wanted to know what Minecraft is all about and would you like to find out if you feel comfortable in this digital sandbox? Our two-hour workshop offers beginners of all ages the perfect environment to get to know the popular game in peace. The workshop will be held in German. However, we are also able to communicate in English and are happy to help you in this language. ## Contents **Basics:** Introduction to controls and game mechanics. **Creative Mode:** Unlimited building and creative design. **Survival Mode:** Basic skills for resource management and survival. **Collaborative Projects:** Teamwork on building projects. ## Participation Requirements **Target Group:** Beginners in Minecraft **Age:** Children aged 6+ years, as well as interested parents and grown-ups ## Technical Requirements **No License Required:** We provide user accounts. **Own Internet-Enabled Device + Charger** **Pre-Installed Minecraft Education App:** Download from the [manufacturer’s website](https://education.minecraft.net/de-de/get-started/download) ## Registration - Please ask on Day 1 from 10:00am in Kidspace (Hall C, first floor) for a participation pass. You’ll need it during the workshop. - Guests are welcome as long as there is space in the room. - Max Seats: 24 ## Wondering? Are you curious about Minecraft? Wondering if Minecraft is a suitable game for your child? Do you have questions about safety, game mechanics and the educational aspects of the game? Feel free to contact me! I'am look forward to the exchange. ghenny https://events.ccc.de/congress/2025/hub/event/detail/minecraft-education-beginner-workshop-6 false 2025-12-27T15:30:00+01:00 15:30 01:30 Kidspace - Hackcenter 39c3-luantiminetest-mods-programmieren de other Das freie Open-World-Spiel Luanti(Minetest) bietet viele Möglichkeiten, kreativ zu werden und zusammen zu spielen. Das Spielprinzip ist ähnlich zu Minecraft, dennoch ist Luanti ein ganz anderes Spiel und keineswegs ein nachgemachter Klon von Minecraft. Genau genommen ist Luanti ein Framework, also ein Baukasten, mit dem sich alle ihr eigenes Sandbox- oder Voxel-Game nach eigenen Vorstellungen zusammenbauen können. Wir lernen Luanti und seine Erweiterungsmöglichkeiten kennen und programmieren eine eigene Mod, die dem Spiel individuelle Items hinzufügt. Zudem ist es möglich, eigene Craftingrezepte zu erstellen, mit denen die neuen Blöcke, Items oder Werkzeuge hergestellt werden können. Je nach Interesse und Zeit werden weitere Bereiche, wie das Programmieren von Commands, eingebracht.Freund*innen spielen kann. Dabei gibt es kleinere Mods, die einzelne Elemente des Spiels verändern, aber auch ganze Games, die ein eigenes Spielprinzip mit sich bringen. [https://teckids.org/projekte/hack-n-fun/workshops/luanti/](https://teckids.org/projekte/hack-n-fun/workshops/luanti/) Wer sich ein Laptop für den Workshop ausleihen möchte, sollte sich spätestens eine Stunde vor dem Workshop an der Teckids-Assembly im Digitalcourage-Habitat melden. Wer ein eigenes Laptop benutzen möchte, benötigt ein Linux-System mit Luanti ab Version 5.10. Siehe auch [https://events.ccc.de/congress/2025/hub/de/project/detail/assembly/laptop-ausleihe-fur-junghackerinnen/](https://events.ccc.de/congress/2025/hub/de/project/detail/assembly/laptop-ausleihe-fur-junghackerinnen/) Wer nach den ersten 1,5 Stunden noch weiter machen möchte, kann [bei Teil 2 an der Teckids-Assembly]([https://events.ccc.de/congress/2025/hub/de/event/detail/luanti-mods-minetest-programmieren-teil-2](https://events.ccc.de/congress/2025/hub/de/event/detail/luanti-mods-minetest-programmieren-teil-2)) weitermachen. kenorca darius Natureshadow https://events.ccc.de/congress/2025/hub/event/detail/luantiminetest-mods-programmieren false 2025-12-27T14:00:00+01:00 14:00 00:50 Bits&Bäume Workshop Area 39c3-kann-ki-uns-den-klima-aktivismus-abnehmen-aus-sich de Workshop 50 Minutes "Kann KI uns den Klima Aktivismus Abnehmen?" - mit dieser Frage haben wir, der AK Digitalisierung der BUNDjugend unsere Aktiven, Vorstand und unsere Geschäftsstelle sowie junge Klimaaktivist*innen konfrontiert. Wir wollen euch vorstellen zu welchem Schluss wir gekommen sind, was wir bereits umsetzen und was unsere Pläne um Umgang mit KI sind. https://pretalx.freifunktag.de/media/39c3-bub-workshops-2025/submissions/AXQ93Y/84eec1a4c77ecf5d_hGHRiw6.png Enrico https://events.ccc.de/congress/2025/hub/event/detail/kann-ki-uns-den-klima-aktivismus-abnehmen-aus-sich https://pretalx.freifunktag.de/39c3-bub-workshops-2025/talk/AXQ93Y/ false 2025-12-27T15:00:00+01:00 15:00 00:50 Bits&Bäume Workshop Area 39c3-how-can-academic-research-and-activism-in-sar-inte en Workshop 50 Minutes Let's snack and chat! We want to invite you to collectively reflect the relationship between activism and academic research with us. As hegemonic and intersectionally discriminatory institutions, universities re-produce global structures of domination and oppression. And regularly, insights from activism inspire academia rather than vice versa. Still, research is a relevant module to understand and meaningfully participate in the world around us. But the line between research and activism becomes blurred anyway. Activists are researchers and researchers are activists, participating in both worlds, oftentimes trying to bring them together. Here, long-term research projects that illuminate specific processes in-depth tend to collide with the rather short-term struggles of activism that need immediate responses to current issues. Therefore, we want to elaborate with you: (How) Can academic research and activism in SAR interact in solidarity? In our own roles as researchers and activists, we appreciate both forms of working and knowledge-producing and are well aware of challenges and difficulties. Together with you, we want to discuss all these challenges and difficulties - but also work out and underline potentials! We organized a workshop like this already at the SAR-Camp in September in Biesenthal. We invite people to newly join in and to follow-up. If you like to, bring some snacks or your breakfast, lunch, dinner, ... The format is meant to be low-key and comfortable! I. Andreas Stoiber https://events.ccc.de/congress/2025/hub/event/detail/how-can-academic-research-and-activism-in-sar-inte https://pretalx.freifunktag.de/39c3-bub-workshops-2025/talk/SNNHQH/ false 2025-12-27T16:00:00+01:00 16:00 01:50 Bits&Bäume Workshop Area 39c3-freifunk-und-gluon-meetup de Workshop 110 Minutes Auch dieses Jahr wollen sich die auf dem Congress anwesenden Entwicklerinnen und Anwenderinnen zu aktuellen Freifunk und Gluon Themen austauschen Link zum Pad: https://md.darmstadt.ccc.de/freifunk-meetup-39c3# Auch dieses Jahr wollen sich die auf dem Congress anwesenden Entwicklerinnen und Anwenderinnen zu aktuellen Freifunk und Gluon Themen austauschen Link zum Pad: https://md.darmstadt.ccc.de/freifunk-meetup-39c3# skorpy https://events.ccc.de/congress/2025/hub/event/detail/freifunk-und-gluon-meetup https://pretalx.freifunktag.de/39c3-bub-workshops-2025/talk/3VFMWL/ true 2025-12-27T18:00:00+01:00 18:00 00:50 Bits&Bäume Workshop Area 39c3-einstieg-in-josm-fur-fortgeschrittene-openstreetma de Workshop 50 Minutes In dieser Session werde ich den OpenStreetMap-Editor JOSM vorgestellen, eine Java-Applikation für das fortgeschrittene Bearbeiten von OpenStreetMap-Daten. Anders als der Online-Editor iD sind auch größere Datenmengen und Relationen mit JOSM bearbeitbar. Der Workshop richtet sich an Leute, die schon einmal zu OpenStreetMap beigetragen haben und Relationen und größere Objekte (z.B. Landnutzungsflächen) bearbeiten möchten. In dieser Session werde ich den OpenStreetMap-Editor JOSM vorgestellen, eine Java-Applikation für das fortgeschrittene Bearbeiten von OpenStreetMap-Daten. Anders als der Online-Editor iD auf der OpenStreetMap-Website sind auch größere Datenmengen mit JOSM bearbeitbar. Die Anwendung kann mit Plugins, eigenen Tagging-Vorlagen und Kartenstilen an die eigenen Bedürfnisse angepasst werden. Die Session richtet sich an Interessierte, die schon einmal zu OpenStreetMap beigetragen haben und tiefer einsteigen möchten oder Relationen und größere Objekte (z.B. Landnutzungsflächen) bearbeiten möchten. Der Workshop richtet sich an Leute, die schon einmal OpenStreetMap-Daten bearbeitet haben. Um zu OpenStreetMap beizutragen, ist ein Benutzerkonto erforderlich. Bitte legt es vor der Session an. Bitte installiert euch JOSM vor der Session (z.B. aus den Paketquellen eurer Linux-Distribution). Achtet bei der Nutzung der Paketquellen eurer Distribution darauf, dass es sich um Version 18678 oder neuer handelt. Andernfalls könnt ihr damit keine Änderungen hochladen. Nakaner https://events.ccc.de/congress/2025/hub/event/detail/einstieg-in-josm-fur-fortgeschrittene-openstreetma https://pretalx.freifunktag.de/39c3-bub-workshops-2025/talk/DAXETE/ false 2025-12-27T19:00:00+01:00 19:00 00:50 Bits&Bäume Workshop Area 39c3-energie-von-uns-fur-uns-vergesellschaftung-als-los de Workshop 50 Minutes Fünf Stromerzeuger dominieren den deutschen Strommarkt. Zusätzlich sitzt mit Katherina Reiche eine Person an der Spitze des Wirschafts- und Energieministeriums, die vier Jahre lang eine Führungsposition innerhalb des Energiekonzerns E.ON innehatte. Zwar gibt es Energiegenossenschaften und Balkonkraftwerkbesitzer*innen, die versuchen, sich von diesen Machtstrukturen ein Stück weit unabhängig zu machen, aber sie produzieren nur einen Bruchteil der Energie, die tagtäglich nachgefragt wird. Die Kampagne RWE und co enteignen setzt sich deswegen für einen Strommarkt ein, der nicht länger von Profitinteressen getrieben wird, und arbeitet an einem Plan, wie dies durch Vergesellschaftung umgesetzt werden kann. Mit der Vergesellschaftung des Energiesektors in NRW wollen wir die Demokratisierung der (Energie)Wirtschaft und eine ernsthafte sozial-ökologische Energiewende erreichen. Auf juristischer Ebene beinhaltet das die Umwandlung von großen privatwirtschaftlich organisierten Unternehmen in Anstalten des öffentlichen Rechts, auf gesellschaftlicher Ebene leitet es einen Paradigmenwechsel ein: von Oligopolstruktur, Intransparenz und riesigen Profitmargen hin zu solidarischen Preismodellen, einem Energiemarkt, der auf Erneuerbare ausgelegt ist und vor allem hin zu einem direkt demokratischen Entscheidungsprozess, an dem alle Betroffenen beteiligt sind - Angestellte, Strombeziehende, von Klimawandel und Energieressourcenabbau Betroffene... Wie könnten Entscheidungsprozesse in einem vergesellschafteten Betrieb aussehen? Erfüllt unser aktuelles Strommarktdesign die Voraussetzungen dafür? Wie funktioniert unser Energiesystem und warum scheitern privatwirtschaftliche Unternehmen an der Umsetzung der Energiewende? Und wo könnten gesellschaftliche Hebel liegen, um eine Vergesellschaftung auch tatsächlich umzusetzen? Im Workshop wollen wir unsere Überlegungen dazu vorstellen und sind gleichzeitig auch gespannt auf eure Gedanken zum Thema - denn auch Technik braucht Strom, also lasst uns überlegen, wie Produktion und Verteilung demokratischer organisiert werden können! https://pretalx.freifunktag.de/media/39c3-bub-workshops-2025/submissions/APGKWY/RWEx-Logo_6LTAqU5.png RWE und co enteignen https://events.ccc.de/congress/2025/hub/event/detail/energie-von-uns-fur-uns-vergesellschaftung-als-los https://pretalx.freifunktag.de/39c3-bub-workshops-2025/talk/APGKWY/ false 2025-12-27T20:00:00+01:00 20:00 00:30 Bits&Bäume Workshop Area 39c3-einfuhrung-in-streetcomplete-fur-openstreetmap de Workshop 50 Minutes StreetComplete [1] stellt kleine, vor Ort schnell lösbare Aufgaben, und hilft, fehlende Informationen zu OpenStreetMap beizutragen und die Karte aktuell zu halten. Im Workshop werde ich zeigen, wie man mit StreetComplete zu OpenStreetMap beitragen kann, und Erfahrungen aus der Nutzung teilen. Für den Workshop sind keine Vorkenntnisse zu OpenStreetMap erforderlich. Zum Bearbeiten der Datenbank/Karte ist ein OpenStreetMap-Account erforderlich, in der App ist ein Account allerdings erst zum Upload von Änderungen erforderlich. [1] https://streetcomplete.app/ jkoe https://events.ccc.de/congress/2025/hub/event/detail/einfuhrung-in-streetcomplete-fur-openstreetmap https://pretalx.freifunktag.de/39c3-bub-workshops-2025/talk/C3UJYN/ false 2025-12-27T14:00:00+01:00 14:00 02:00 Food Hacking Base 39c3-probiotic-drinks-making-fhb en other This workshop is about making probiotic drink from a to z. You will get practical experience making your own, tasting samples and getting info from an experienced person. [To secure spot on this workshop please sign in here.](https://dud-poll.inf.tu-dresden.de/pdm_39c3/) This an introductory workshop into probiotic brewing, everybody is welcome no one turned away for lack of funds. algoldor https://events.ccc.de/congress/2025/hub/event/detail/probiotic-drinks-making-fhb false 2025-12-27T18:00:00+01:00 18:00 02:00 Food Hacking Base 39c3-cider-flows-fhb en other This is a cider tasting presented by František Apfelbeck who is experienced brewer and cider maker, kvasir. We will go through variety of cider styles, please do your booking so there are spots on this session. Entrance is donation at your will no one turned away for lack of funds. https://dud-poll.inf.tu-dresden.de/cf1_39c3/m [To secure spot on this guided tasting workshop, session I. please sign in here.](https://dud-poll.inf.tu-dresden.de/cf1_39c3/) [To secure spot on this guided tasting workshop, session II. please sign in here.](https://dud-poll.inf.tu-dresden.de/cf2_39c3/) [[Image:Cider_selection_and_snacks_faa2017.jpg|thumb|Cider tasting at [https://voidwarranties.be/ Voidwarranties], Antwerpen 2017, the cider selection got much better since then]] [[Image:Algoldor workshop 27122019.jpg|thumb|Cider workshop at 36c3]] [[Image:Specific_density_ld032020.jpeg|thumb|Measuring specific density of cider]] [[Image:Pressage_nettoyage_faa102019.jpg|thumb|Cleaning of apples before pressing]] [[Image:Apple_crasher_hereford_cider_museum_faa_1600_082018.jpg|thumb|Old apple crasher, [http://www.cidermuseum.co.uk/ Cider Museum Hereford] ]] [[Image:800px-Moi nuren 1600 faa05122019.jpg|thumb|Pressing apples with a friend]] [[File:Cider_apples_distance_ferme_du_vastel_faa112016.jpg|thumb|Cider apples, [http://www.lafermeduvastel.net/ Ferme du Vastel] ]] [[Image:Pressage_pressoir_mout_faa102019.jpg|thumb|Pressing the moût]] This event is dedicated to cider, cidre, sidra or how ever you would like to call beverage prepared by fermentation of apple juice. This event is run by František [[User:Algoldor|Algoldor]] Apfelbeck and is one of the activities of the [https://cidreriejara.com/wiki/Main_Page Cidrerie Jara/Kvasírna Jara] project which is a commercial one. '''Aims&Selection''' The aim of this event is to educate people about cider in a nice and socially friendly environment. It is guided tasting with short foreword and then after opening first bottle just continuing with other ones when talking on the subject of cider and it's making. We provide a high quality selection of ciders focusing on "typical" products, plus we add some really special samples depending what we have available. At the core of the tasting are French ciders, especially from Normandie region and partly Bretagne. From the geographical point of view we generally have at least one sample from North of Spain, Andalusia or Basque. There is cider from England, because of strong connections to Czech Republic we try to have there one from there and generally we include at least one [https://en.wikipedia.org/wiki/Apfelwein German Apfelweine], the rest depends what interesting samples we get. From the point of view of style of production we are selecting mostly the more "complex" "natural ciders" made from cider apples, if possible without any additives, unfiltered and secondary fermented in the bottle (prise de mousse naturelle). That would be the highest end. It is however hard to make whole tasting in quality like this so we also get small scale bio/organic production. These are good quality ciders which may be for example filtered, some enzymes added, sulfur etc. We generally include one classic big scale commercial cider for comparison. To increase a bit of spectrum of what can be done we like to have some flavoured ciders, like raspberry cider, honey cider etc. We do like to include one or two [https://fr.wikipedia.org/wiki/Poir%C3%A9 poirés (perry)] into the selection. It happens quite often that it is the first poiré which people had in their life and if you are not in the region or you don't have next to you really good alcohol shop it is really hard to get a high quality one. To finish the tasting we have at least one or two cider related products like pommeau, calvados or vinegar. '''Style''' This tasting workshop is based on "donation at your will no one turned away for lack of funds" creed. However please keep in mind that samples and ingredients for this event will be around 150-200 eu and ending up in a decent plus would help covering costs related to my, [[User:Algoldor|Algoldor]], presence at this event. This is a guided tasting. During the presentation we talk about the cider in general as mentioned above. At the beginning of the tasting it is explained how to taste and evaluate the product properly. We talk about the proper shape of glasses, temperature of serving, preparing the pallet and so on. We discuss also the colour, difference of astringency, bitterness and acidity, levels of sparkliness and more. Concerning the products we start with the extra-bruts and we go in the direction of increasing sweetness towards bruts, demi-secs and douce. We try to make a list of ciders which we taste at the event with the contact details so you can get them if you like. At the end of the event we offer [https://cidreriejara.com/wiki/Main_Page Cidrerie Jara's ciders] and other products for sale for suggested donation in a legal manner so you can get a receipt, the taxes are paid. However we are trying to avoid "commercialization" of the CCC events, so it is rather about getting a bottle or two and buying more later on through delivery, inviting us to do cider tasting at your place or getting stock of bottles stocked for your local hackerspace. Part of the funds which we got from this event goes to fhb and the larger part to [[User:Algoldor|Algoldor]] covering costs for participation and also using it for fermentation projects and day to day life expenses. '''Most Frequent Candidates''' Here you can find some basic tips for nice ciders which I either liked or are introduced at the tastings. Not all of them are always "on" but several of them are core members. It changes of course with time to reflect the seasonality and the specificity of the product. '''List of Ciders''' {| class="wikitable sortable" ! Cidre Name ! Producer ! Amount ! Country of origin ! Person Trafficking it ! Notes |- |Opiédumur Lemasson |[http://www.cidre-lemasson.fr/ Cidrerie Lemasson] |Le Vaucher, 50570 Cametours, Normandie, France |75 cl |[[User:Algoldor|Algoldor]] | Top batch of the year, 5% alc. brewer Damien Lemasson, produced at la Ferme du Vaucher, bottle fermented. | | | -------------------------------------------------------------------------------------------------------------------------------------------------------------------- | ------------------------------------------------------------------- | | Le Grosse Brute | | | [https://www.lafermeduvastel.net/ La Ferme du Vastel] | | | 6 Le Hameau Vastel, Tuerthéville-Bocage, 50630, France | | | 75 cl | | | [[User:Algoldor | Algoldor]] | | Cidre which reminds by style old traditional farmer's cidre which is hard to come by these days with slide acetic volatile, 5% alc, bottle fermented millésime 2020. | | | - | | | Cidre du Pays de Quimperle | | | [https://www.desbouteillesalamere.bzh/ Des Bouteilles à l'Àmère] | | | Marc Frocrain & Isabelle Richard, Vieux village du Kérou, 29 360 Clohars-Carnoët, France | | | 75 cl | | | [[User:Algoldor | Algoldor]] | | Really nice cider from Bretagne, Finistère, small high quality production. | | | - | | | Brut | | | [[User:Algoldor | Algoldor]], [https://cidreriejara.com/wiki/Main_Page Cidrerie Jara] | | Val de Saire, Valcanville, France | | | 75 cl | | | [[User:Algoldor | Algoldor]] | | Brut, organic, hand picked, wild fermentation, millésime 2019, 2020 and 2022 bottle fermented. | | | - | | | Black Fox Cider | | | [https://www.dunkertonscider.co.uk/ Dunkertons Organic Cider] | | | London Rd, Charlton Kings, Cheltenham GL52 6UT, United Kingdom | | | 500 ml??? | | | [[User:Algoldor | Algoldor]] | | Medium dry, sparkling, 7% alc. winner of our cidre flows at EMF2018 in UK. | | | - | | | Bio sidro allo Zenzero e mela | | | [https://bauernladen.it/it Floribunda] | | | Strada Principale 78, 39025 Naturno - Alto Adige, Italia | | | 75 cl | | | [[User:Algoldor | Algoldor]] | | I would say brut, with very nice flavour of ginger, added honey, 6% alc. no sulphates added, bottle fermented. | | | - | | | Poiré Domfront | | | [http://pacory.eu/ Pacory, Ferme des Grimaux] | | | Les Grimaux, 61350 Mantilly, Basse Normandie, France | | | 75 cl | | | [[User:Algoldor | Algoldor]] | | Fourth generation of cider and poiré makers, Domfront regional poiré (one of my favourits). 4% alc, bottle fermented. | | | - | | | Cidronoix | | | [https://www.calyce-cider.com/produit/sydra-maison-rouge/ Maison Rouge] | | | Mathias Faurie, Molières, Périgord, France | | | 75 cl | | | [[User:Algoldor | Algoldor]] | | Interesting cider from South of France with marination of walnuts. | | | - | | | Guillevic | | | [https://www.maisoncidricoledebretagne.bzh/earl-du-ienen/ Cidrerie du Pays d'Auray] | | | Yves Maho, Lieu dit Kervihern, 56550 Locoal Mendon, France | | | 75 cl | | | [[User:Algoldor | Algoldor]] | | Nice, sweeter style of guillevic, prise de mousse naturelle. | | | - | | | Cidre mielé | | | [[User:Algoldor | Algoldor]], [https://cidreriejara.com/wiki/Main_Page Cidrerie Jara] | | Val de Saire, Valcanville, France | | | 75 cl | | | [[User:Algoldor | Algoldor]] | | Brut with addition of 5% honey, organic, hand picked, wild fermentation, millésime 2019, boottle fermented. | | | - | | | Kliment Cidre Brut 2019 | | | [http://cidrerie.cz/ Cidrerie Kliment] | | | Cidrerie Kliment Všenory, Na Návsi 37, 252 31, Praha-západ, Czech Republic | | | 75 cl | | | [[User:Algoldor | Algoldor]] | | French style of cidre made from Czech aples, +-5.5% alc, bottle fermented. | | | - | | | Euskal Sagardoa | | | [http://www.bereziartuasagardoa.com/en/ Bereziartuasagardoa] | | | Bere-Aran Extea - Ipparalde Bidea 16, 20115 - Astigarraga (Gipuzkoa), Spain | | | 75 cl | | | [[User:Algoldor | Algoldor]] | | Sidra natural, made 100% from apples from Basque County, volatile acidity: 1.5-2, 6% alc. | | | - | | | Stassen Cider | | | [http://www.stassen.be/site/index.php Stassen] | | | Stassen SA, Rue de Kan 7, 4880 Aubel, Belgium | | | 75 cl | | | [[User:Algoldor | Algoldor]] | | Big producer in Belgium, 5% alc. | | | - | | | Odnasilder Rosé 2017 | | | [https://siidritalu.ee/ Siidritalu] | | | Tori Siidritalu, Jõesuu, 86802 Pärnu maakond, Estonia | | | 75 cl | | | [[User:Algoldor | Algoldor]] | | Cidre rosé with [https://en.wikipedia.org/wiki/Aronia Aronia], 5.8% alc. | | | - | | | Suchý Cider | | | [https://www.tatuvsad.cz/ Tátův Sad] | | | V Líšnici 17, Praha – západ, PSČ 56184 (probably), Czech Republic | | | 500ml | | | [[User:Algoldor | Algoldor]] | | Polosuchý cider, 6.2% alc. | | | } | | '''Interesting Cidre Related Pages''' http://www.cider.org.uk/ pages of specialist Andrew Lea http://www.ciderroute.co.uk/cider-producers/ places to visit around Hereford. https://herefordcamra.org.uk/cider.htm#list list of ciders in Hereford region. https://www.cambridgebeerfestival.com/products/cbf44-cider/ famous UK beer festival which also offers some ciders. http://cfppa.le-robillard.fr/ french research and educational cidre institute le Robillard algoldor https://events.ccc.de/congress/2025/hub/event/detail/cider-flows-fhb false 2025-12-27T20:30:00+01:00 20:30 02:00 Food Hacking Base 39c3-fhb-cheese-rendezvous en, de other The traditional cheese tasting! - Session 1 [To secure spot on the Session I. (Day 1, SAT 20h30) please sign in here](https://dud-poll.inf.tu-dresden.de/cheese1_39c3/) [To secure spot on the Session 2. (Day 3, MON 20h30) please sign in here.](https://dud-poll.inf.tu-dresden.de/cheese2_39c3/) Each cheese tasting session is open to 25 people max, please do sign in advance, you can just show up before the event but we are very likely going to be full for this one (like three times overbooked). If you can bring cheese which you made by yourself that would be great! Of course some specific local or extraordinary cheese/s or other related condiments like sun dried tomatoes, good quality olives, mustards, wine all would be appreciated. If you are bringing cheese please do label it well with at least it's name and type of milk used, your nick or name/contact would come handy too. The best would be of course to add short description to our wiki (please check the sample). Still please sign in in advance! FHB will be getting some high quality cheeses to offer basic selection with other samples surrounding it plus some basic condiments. Note that due to the interest in previous years we are going to run two sessions, each one lasting for about two hours or bit over. This event is based on donation at your will no one turned away for lack of funds. So lets meet all together again enjoying these lovely creations! Here you can find cheeses which are going to be present, please do add your ones and keep in mind that good half of the cheeses will be not listed here, they will just appear and they are worth of your attention! [A full overview of cheeses you can get here](https://foodhackingbase.org/wiki/FHB@39C3/Cheese_Rendezvous) vrs https://events.ccc.de/congress/2025/hub/event/detail/fhb-cheese-rendezvous false 2025-12-27T15:00:00+01:00 15:00 02:00 Hardware Hacking Area -- Rear 39c3-meshcore-meshtastic-for-beginners en other Meshcore & Meshtastic for Beginners **Meshcore & Meshtastic for Beginners** **Materials costs**: €140 **Taught by** Retia / Kody & Brandon. **Workshop Itinerary**: Dive into the world of off-grid communications! In this introductory workshop, you will receive a LoRa node and learn how to set up the Meshtastic firmware and connect to your regional mesh network. We will cover the basics of LoRa technology, how to pair your node with your phone, sending encrypted messages without cell service, and understanding the mesh network topology. Perfect for anyone looking to build a resilient, grid-down comms device. **Registration**: Buy a kit at the Hardware Hacking Area to guarantee a seat, or come by early! (And please do arrive early, regardless!) First come, first served. **Links**: [Reserve Your Seat](https://retia.io/products/sec-t-2025-workshop-meshtastic-for-hackers-set-up-configure-deploy-nodes-for-advanced-use-fri-12th-14-45-16-30-copy) **Workshop Includes**: New Nibble Zero https://events.ccc.de/congress/2025/hub/https://usercontent.events.ccc.de/congress/2025/hub/usercontent/e/11f86980af3e/1000016093222.jpg skickar https://events.ccc.de/congress/2025/hub/event/detail/meshcore-meshtastic-for-beginners false 2025-12-27T17:30:00+01:00 17:30 01:30 Hardware Hacking Area -- Rear 39c3-39c3-led-badge-smd-for-beginners-day-1 en other **39C3 LED badge -- SMD for Beginners** https://github.com/hackwinkel/39C3LEDbadge The 39C3 LED badge contains 42 LEDs that blink under control of of a pre-programmed 4 cent microcontroller. When the badge is alone, the LEDs will blink randomly. When it is among friends (when there are other badges nearby), it will display a chaser pattern. In this workshop you will learn how to solder Surface Mounted Devices using a normal soldering iron. Suitable for beginners. Under 16s only with responsible adult supervision. ### 39C3 LED badge -- SMD for Beginners  Surface Mounted Devices (SMDs) are small compared to Through Hole (TH) electronic components, and have the reputation of being difficult to work with as a hobyist: Difficult to see and handle, when you sneeze, you loose them and you can not easily use them on 2.54mm raster prototyping boards. SMD components are designed to be used in a reflow soldering process where tiny dots of solder paste are applied to a Printed Circuit Board (PCB), after which the SMD components are "Picked and Placed" on the PCB, after which the whole PCB is heated to the melting point of the solder ("reflowing"), actually completing the electrical connections. This workshop is aimed at showing you that the reputation of being difficult to work with is a bit undeserved, and that you can also work with SMDs using just a regular soldering iron: With some simple tricks and a suitable selection of components (not the smallest possible), the vast majority of people can successfully complete this project. Being able to solder SMD projects using just a simple soldering iron will also help you develop some skills that are useful if you need to do "rework" on reflow soldering projects. Reflow soldering is also not difficult to do as a hobbyist, but requires a few more tools like a stencil to apply solder paste and either an oven or a hot plate to do the reflowing. It is, however, much quicker than soldering the parts one by one, and can yield more professional looking, cleaner, solder joints. The project is an electronic name-badge - You should write your name (or nick) on it and wear it. It contains 42 LEDs, a microcontroller, some support components and an InfraRed transmitter and receiver that allow it to communicate with other badges. When the badge detects the presence of other badges ("friends") nearby, it will change its behaviour. It will not only interact with other 39C3 LED badges, but also with TBD badges - come visit the TBD assembly at komona or https://tbd.camp  ### Costs This workshop is donation based. Materials costs are 2 euro per badge. Donations will go towards 1) covering costs of the badges, 2) covering costs of running the hardware hacking area in general, 3) covering costs of organizing TBD (see the TBD assembly at komona or https://tbd.camp) ### Registration The number of participants per session is limited. First come, first served. Either get a participation voucher beforehand or show up early (there may be places left). There will be *numbered* paper vouchers available for each session some time in advance of each session. If you get a voucher and do not show up *before* the designated starting time, someone else may take your spot. Please don't take multiple vouchers and don't take vouchers if you don't actually plan to participate. ### Getting a kit Kits are part of the workshop and not for sale separately. You can, however easily source your own PCBs and parts and make kits yourself because the design is MIT licensed open source. ### Links https://github.com/hackwinkel/39C3LEDbadge Mitch (he/him) the0 (he his him) https://events.ccc.de/congress/2025/hub/event/detail/39c3-led-badge-smd-for-beginners-day-1 false 2025-12-27T19:30:00+01:00 19:30 01:30 Hardware Hacking Area -- Rear 39c3-is-that-an-off-grid-server-in-your-pocket-or-are-y en other Is That an Off-Grid Server in Your Pocket, or Are You Just Happy to See Me? **Is That an Off-Grid Server in Your Pocket, or Are You Just Happy to See Me?** **Materials costs**: €70 **Taught by** Retia / Brandon. **Workshop Itinerary**: Learn how to host your own digital services on hardware small enough to fit in your pocket. Using the D1 Mini, we will deploy a portable, off-grid web server. You’ll learn how to host files, chat applications, or a captive portal that works entirely independently of the internet. Great for digital dead drops or local emergency information sharing. **Registration**: Buy a kit at the Hardware Hacking Area or website to guarantee a seat, or come by early! (And please do arrive early, regardless!) First come, first served. **Links**: [Reserve Your Seat](https://retia.io/products/39c3-workshop-is-that-an-off-grid-server-in-your-pocket-27-dec-19-30-21-00) https://events.ccc.de/congress/2025/hub/https://usercontent.events.ccc.de/congress/2025/hub/usercontent/e/3cb143a786b2/pusheen.PNG brandonpaiz https://events.ccc.de/congress/2025/hub/event/detail/is-that-an-off-grid-server-in-your-pocket-or-are-y false 2025-12-27T21:30:00+01:00 21:30 03:00 Hardware Hacking Area -- Rear 39c3-ai-tiny-blinkeshit3000-smd-reflow-for-beginners en, de other AI-tiny Blinkeshit3000: SMD reflow workshop for beginners **AI-tiny Blinkeshit3000 (SMD reflow for beginners)** **Materials costs**: €25 - €40 **Taught by**: Swiss Mechatronic Art Society. **Device**: The Blinken3000 device is based on an ATTiny85 and 4x5 RGB LEDs and - thanks to a custom ATmel booloader - can be programmed via an 3.5mm audio jack. **Workshop Itinerary**: Using a self-etched PCB and lots of LEDs, you get the chance to play pick & place machine, before putting your device into the reflow oven to take care of the soldering magic. Afterwards, it's all about using AI to create fancy colour patterns and experimenting with different kinds of diffusors for sparkling light effects. No soldering skills required. Some fine motoric skills needed for placing the components onto the PCB. No programming skills required, as we let AI do the heavy software lifting. **Registration**: Buy a kit at the Hardware Hacking Area to guarantee a seat, or come by early! (And please do arrive early, regardless!) First come, first served. **Links**: Mitch (he/him) https://events.ccc.de/congress/2025/hub/event/detail/ai-tiny-blinkeshit3000-smd-reflow-for-beginners false 2025-12-27T17:00:00+01:00 17:00 02:30 Hardware Hacking Area -- Rear-middle 39c3-stonehenge-weird-soldering-challenge en, de other Stonehenge Cursed Soldering Challenge **Stonehenge Cursed Soldering Challenge** **Materials costs**: €10 **Taught by** Kliment. **Workshop Itinerary**: * Test and Increase your soldering skills with this challenge in the shape of Stonehenge. * Prior soldering experience helps, but is not mandatory * The components are mounted in an unorthodox way making this a unique challenge * Kit includes * Empty PCB * All the parts needed for assemly * A 3D-printed multipurpose base * Nice base to display the finished board * Store components during assembly * Protect the finished board for transport by placing it upside down * The board features a `CH32V203` microcontroller which can easily be programmed without extra tools **Registration**: Buy a kit at the Hardware Hacking Area to guarantee a seat, or come by early! (And please do arrive early, regardless!) First come, first served. **Links**: * [https://gitlab.ccc.ac/cpresser/stonehenge](https://gitlab.ccc.ac/cpresser/stonehenge) * [https://gitlab.ccc.ac/cpresser/stonehenge-firmware](https://gitlab.ccc.ac/cpresser/stonehenge-firmware) https://events.ccc.de/congress/2025/hub/https://usercontent.events.ccc.de/congress/2025/hub/usercontent/e/f41fbaa2e861/stonehenge.png Mitch (he/him) https://events.ccc.de/congress/2025/hub/event/detail/stonehenge-weird-soldering-challenge false 2025-12-27T21:30:00+01:00 21:30 02:00 Hardware Hacking Area -- Rear-middle 39c3-light-and-sound-badge-making-choice-of-2-kits en other Light and Sound Badge-Making (choice of 2 kits) **Light and Sound Badge-Making (choice of 2 kits)** **Materials costs**: €25 **Taught by** fablab|nk. **Workshop Itinerary**: Choose to build one of two badge-kits: a drawable-reusable LED convention badge (1 hour, beginner skill level) or a beam-catching light-to-sound synthesiser badge (2 hours, intermediate skill level) About the SynthLab “Beam-Catcher” Badge: A special-edition light-to-sound synthesiser badge based on Dylan B's open-source Beam Catcher project. Wave a DIY photoresistive probe over 6 tunable LED’s to amplify light frequencies and create your own drone-tones. ‘Break-out’ your badge and power it with a 9V battery or leave it intact and use it as your first Eurorack synth module (see it in action in our DIY rack at our assembly!). This project comes out of our weekly SynthLab audio hardware meetups at fablab|nk and is designed to be a first-introduction kit to DIY synthesiser building for new visitors :) About the Mechmon Drawable Convention Badge: Create your own unique, reusable convention badge! This fun hands-on project lets you solder a 555-timer based LED badge that blinks and shows off your style. The screenprinted avatar area can be drawn on with a whiteboard marker, then easily erased to design new faces or characters again and again. Perfect for makers and convention-goers alike, this workshop combines creativity, electronics, and personalization—so you can stand out with a badge that’s truly one of a kind at 39C3 and your next event **Registration**: Buy a kit at the Hardware Hacking Area to guarantee a seat, or come by early! (And please do arrive early, regardless!) First come, first served. **Links**: [SynthLab „Beam-Catcher“-Badge](https://github.com/fablabnk/SynthLabBadge) [Inspiration](https://loess-labs.net/inst/beam/) [Mechmon Drawable Convention Badge](https://github.com/fablabnk/MechMonBadge) https://events.ccc.de/congress/2025/hub/https://usercontent.events.ccc.de/congress/2025/hub/usercontent/e/e707c4f11ad8/SynthLabBadge.jpg graham42 https://events.ccc.de/congress/2025/hub/event/detail/light-and-sound-badge-making-choice-of-2-kits false 2025-12-27T17:00:00+01:00 17:00 02:00 Hardware Hacking Area -- Front 39c3-build-your-own-satellite-ground-station en other A beginner-friendly, hands-on workshop where you build and program a TinyGS satellite ground station and a simple antenna. Learn the basics of receiving LoRa satellite and weather probe data, then get your station online and ready to pick up signals from space. # Build Your Own Satellite Ground Station Are you fascinated by space and want to learn how to receive data from satellites and weather probes? Join us in this TinyGS Station Workshop where you’ll build and program your own ground station and antenna to receive data from space. This hands-on, beginner-friendly workshop is perfect for anyone interested in radio, electronics, IoT, antenna design, and space exploration. ## TinyGS [TinyGS](https://tinygs.com/) is an open, community-run network of ground stations distributed around the world to receive and operate LoRa satellites, weather probes, and other flying objects using cheap and versatile modules. With a TinyGS ground station, you can receive data from a variety of sources, including CubeSats. ## What You’ll Learn During the workshop, you’ll learn how to build and program a TinyGS ground station and a quarter-wave ground plane antenna. No prior experience is required. We’ll provide the materials, tools, and equipment to guide you through the process. ## Requirements - A device with a web browser and WiFi, such as a phone or laptop - A [Telegram](https://telegram.org/) account - No previous experience required, beginner-friendly ## Materials Costs It costs **€80** for a kit to take home. You’ll leave with your own ground station. Pair it with a waterproof box, and you’ll be ready to pick up satellites. ## Instructions [https://www.tog.ie/build-your-own-satellite-ground-station-tinygs-compressed/)](https://www.tog.ie/build-your-own-satellite-ground-station-tinygs-compressed/) ## Facilitator Taught by [Jeffrey Roe](https://chaos.social/@tdr112). **Buy a kit at the Hardware Hacking Area to guarantee a seat, or come by early. Please do arrive early, regardless.** https://events.ccc.de/congress/2025/hub/https://usercontent.events.ccc.de/congress/2025/hub/usercontent/e/684d627b68e5/build-your-own-satellite-ground-station.banner.jpg tdr112 (he/him) https://events.ccc.de/congress/2025/hub/event/detail/build-your-own-satellite-ground-station false 2025-12-27T19:30:00+01:00 19:30 02:00 Hardware Hacking Area -- Front 39c3-emf-explorer-badge-electromagnetic-discorvery-work en other Ever wonder about the invisible world of electromagnetic fields around you? In this beginner-friendly hands-on workshop, you’ll build your own EMF Explorer Badge from a kit, learn about different electromagnetic frequency bands, and walk away ready to explore the unseen frequencies that surround our daily lives. ### EMF Explorer Badge Soldering Workshop In this hands-on build-and-explore workshop, participants assemble their own **[EMF Explorer Badge](https://emfexplorer.space)** using guided soldering instruction, learn the science of electromagnetic frequency bands, and plug in headphones to *listen* to the invisible world around them. Every participant takes home their own exploration kit: badge + headphones, ready for EMF exploring with an illuminated badge that can be used at night for visibility and bling. --- ##### Material Costs €20 - €30 --- ##### Workshop Itinerary - **Welcome + Electronics and Soldering Info** We will show you how to solder. Anyone who can safely hold a soldering iron can do it! It is actually a very easy skill to learn. It is also very useful. - **EMF Explanation and Badge Creation Overview** Learn about what EMF is, where it comes from, and how the badge works. - **Badge Assembly** Get to soldering! We will be available to help you along the way. - **Check your work, and power up your badge!** - **Wrap-Up + Q&A** - ** Live Exploration!** You are surrounded by interesting electronics at 39C3. Go exploring! What new sounds do you hear? Some of the most unassuming electronics can make the most interesting sounds. --- ##### Registration Info Buy a kit at the Hardware Hacking Area to guarantee a seat, or come by early! (And please do arrive early, regardless!) First-come, first-served. - **Age:** anyone who can safely hold a soldering iron - **Experience level:** No prior soldering experience required - **Take-home:** Your assembled badge + headphones included --- ##### Links [EmfExplorer.Space](https://emfexplorer.space) --- ##### Instructor Notes This is a **beginner-first hardware workshop**. The goal is skill building, curiosity, and real-world electronics exploration. The badge is both a tool and a conversation piece: it senses EMF, plays it through audio, and glows for visibility and bling. --- ##### Taught by **[Drc3p0](https://links.darcyneal.com)** Drc3p0 (they/them) https://events.ccc.de/congress/2025/hub/event/detail/emf-explorer-badge-electromagnetic-discorvery-work false 2025-12-27T22:00:00+01:00 22:00 02:00 Hardware Hacking Area -- Front 39c3-noisio-attiny-punk-console en, de other The ATtiny Punk Console (short ATPC) is an experimental synthesizer kit designed around the ATtiny85 microprocessor. Once started as an 8-bit equivalent of the famous DIY entry-level Atari Punk Console, it has developed into a minimalistic but feature-rich synth box over the years. The latest version now offers a choice of 10 different synth algorithms at startup. **noisio ATtiny Punk Console** **Materials costs**: €20 - €50 **Taught by** noisio. **Workshop Itinerary**: Solder yourself a synth from easy to peasy. This workshop will focus on the ATtiny Punk Console, but other noisio synths can be build in parallel. No previous solder experiences are necessary. **Registration**: Buy a kit in the hours before the workshop at the Hardware Hacking Area to guarantee a seat, or come by early! (And please do arrive early, regardless!) First come, first served. **Links**: https://noisio.de/boards/attiny-punk-console https://events.ccc.de/congress/2025/hub/https://usercontent.events.ccc.de/congress/2025/hub/usercontent/e/21b657ff8c73/ATPCv4_topView.jpg Mitch (he/him) https://events.ccc.de/congress/2025/hub/event/detail/noisio-attiny-punk-console false 2025-12-27T21:30:00+01:00 21:30 02:30 Hardware Hacking Area -- Front-middle 39c3-blocktris-game-soldering-workshop-not-for-beginner en other Blocktris game soldering workshop (not for beginners) https://github.com/hackwinkel/10x20_LED_screen **Blocktris game soldering workshop (not for beginners)** **Materials costs**: €8 **Taught by** Theo. **Workshop Itinerary**: **Registration**: Get a reservation voucher at the Hardware Hacking Area to guarantee a seat, or come by early! (And please do arrive early, regardless!) First come, first served. **Links**: https://github.com/hackwinkel/10x20_LED_screen Mitch (he/him) https://events.ccc.de/congress/2025/hub/event/detail/blocktris-game-soldering-workshop-not-for-beginner false 2025-12-27T14:30:00+01:00 14:30 02:00 Call for Art: Workshopspace 1 39c3-pixelprinting-with-bricks other Workshop with pixelprint * DAY 1: 14:30 - 16:30 * DAY 2: 14:00 - 16:00 * DAY 3: 14:00 - 16:00 We print with building block tiles, also known as Lego Dots™, on paper. There will be a short introduction to the printing technique and how to create the printing plates. We print using the primary colors and can mix any other color as needed. What makes Lego Dots™ exciting is that you are bound to a grid – in this case, 8×8 units. The tiles come in different shapes: circles, squares, quarter circles, and many more. Have a look at the gallery to see some examples. We print using a press from the Open Press Project. The print size is limited to 7×7 cm due to the press we are using. It is a “jump-in” workshop with no registration required – when one person leaves, the next can join in. Link: [https://pxlprnt.de](https://pxlprnt.de) https://events.ccc.de/congress/2025/hub/https://usercontent.events.ccc.de/congress/2025/hub/usercontent/e/17f316f71899/Pixelprint_ing_with_bricks_Klemmbausteine_Alain_Wohlfarth.jpg https://events.ccc.de/congress/2025/hub/event/detail/pixelprinting-with-bricks false 2025-12-27T18:00:00+01:00 18:00 01:30 Call for Art: Workshopspace 1 39c3-how-to-break-your-face-keeping-up-with-the-arms-ra other Workshop with Anna Maria & Michelle Tylicki DAY 1: 18:00 - 19:30 DAY 2: 17:30 - 19:00 DAY 3: 20:30 - 22:00 Facial recognition systems are rapidly advancing - fusing infrared, facial geometry, gait, and metadata into oppressive infrastructures of racist policing and surveillance capitalism. At the same time, artists, activists and everyday citizens are developing creative ways to interfere, confuse, and disappear from automated identification. Workshop 1: Break Your Face Hands-on demonstration of Dazzle anti-surveillance makeup techniques. Live-testing our work to understand machine vision -and how to break it. Workshop 2 + 3: Zine-making Starting with a discussion of creative anti-surveillance tactics, we then combine the workshop participants' knowledge and experience to co-creating a zine. Info: We will be using easily available live face filters on smart phones (instagram/snapchat/tiktok). Participants can use their own phones. The data is not uploaded or saved anywhere. www.michelletylicki.info/ www.sanma.cargo.site/ https://events.ccc.de/congress/2025/hub/https://usercontent.events.ccc.de/congress/2025/hub/usercontent/e/ea3c8e060ae5/HOW_TO_BRAK_YOUR_FACE_Anna_Maria.jpg https://events.ccc.de/congress/2025/hub/event/detail/how-to-break-your-face-keeping-up-with-the-arms-ra false 2025-12-27T20:30:00+01:00 20:30 01:30 Call for Art: Workshopspace 1 39c3-post-platform-digital-publishing other Workshop mit Well Gedacht Publishing DAY 1: 20:30 - 22:00 DAY 2: 20:00 - 21:30 DAY 4: 11:30 - 13:00 In this workshop, we will engage with digital publishing methods that operate independently of big tech platforms and products. We will build our own RSS files for personal websites, blogs and discuss pirate publishing forms, both online and offline. We will present the idea of the PPDP-PRINTER, a DIY device currently under development that combines web2print scripts with a simple server and local online publishing/broadcasting capabilities. The printer converts files, prints via its dot-matrix printer, creates RSS feeds, and serves them online. Our aim with the PPDP-PRINTER is to create an all-in-one material manifestation of our resource collection Post-Platform Digital Publishing Toolkit Link: [https://publishing.wellgedacht.com/](https://publishing.wellgedacht.com/) mastodon: [@wellgedachtpublishing@post.lurk.org](https://post.lurk.org/@wellgedachtpublishing) https://events.ccc.de/congress/2025/hub/https://usercontent.events.ccc.de/congress/2025/hub/usercontent/e/17cd4c844510/Post-Platform_Digital_Publishing_Fadi_Houmani.jpeg https://events.ccc.de/congress/2025/hub/event/detail/post-platform-digital-publishing false 2025-12-27T17:30:00+01:00 17:30 02:00 Call for Art: Workshopspace 2 39c3-kivoodoo-extracting-future-sealife-with-genai other Workshop with ceryo / Jo Tiffe DAY 1: 17:30 - 19:30 DAY 2: 13:30 - 15:30 In the workshop, we discover motifs that genAIs tend to overlook: marine flora and fauna. On top of that, we will try to find out what these might look like in 10 years' time, under both utopian and dystopian conditions. We will work with image and video generators. Please bring your laptop. Link: [https://form-f.net/bugbone.form-f.art](https://form-f.net/bugbone.form-f.art) Instagram: [@j0.tiff](https://instagram.com/@j0.tiff) Bluesky: [@j0tiff.bsky.social](https://bsky.app/profile/j0tiff.bsky.social) Mastodon: [@Jo_designart@digitalcourage.social](https://digitalcourage.social/@Jo_designart) https://events.ccc.de/congress/2025/hub/https://usercontent.events.ccc.de/congress/2025/hub/usercontent/e/8e6c140aeb11/KI.VooDoo_-_extracting_future_sealife_with_genAI_Jo_Tiffe.jpg https://events.ccc.de/congress/2025/hub/event/detail/kivoodoo-extracting-future-sealife-with-genai false 2025-12-27T20:15:00+01:00 20:15 00:30 Kidspace - Affenfelsen 39c3-guten8geschichte-das-neinhorn-tag-1 de other Mach es dir gemütlich und lausche einer zauberhaften Geschichte! An drei Abenden liest Nolo jeweils um 19:00 Uhr (Tag 1 um 20:15!) einen Teil aus Marc-Uwe Klings Neinhorn-Reihe als GuteN8Geschichte vor. This event will be held in German. Anyone who feels like enjoying a relaxed story time **Age**: 0+ **Just drop by and join us as we dive into the imaginative world of the Neinhorn!** **Duration:** approx. 30 minutes per evening https://events.ccc.de/congress/2025/hub/event/detail/guten8geschichte-das-neinhorn-tag-1 false 2025-12-27T13:00:00+01:00 13:00 00:30 CADUS Skill-Station 39c3-daily-tech-talk-cadus-academy-building-an-open-lea de other Jeden Tag geben wir einen kurzen Einblick in den Aufbau der CADUS Academy: unserer offenen Lernplattform für medizinische, technische und psychosoziale Trainings. Wir zeigen, wo wir gerade stehen, welche Ideen wir verfolgen und wie die Community sich einbringen kann. Fragen, Feedback und spontaner Austausch ausdrücklich willkommen. Each day, we’ll give a short insight into the development of the CADUS Academy: our open learning platform for medical, technical, and psychosocial training. We’ll share where the project currently stands, the ideas shaping it, and how the community can get involved. Questions, feedback, and spontaneous discussions are warmly welcome. https://events.ccc.de/congress/2025/hub/event/detail/daily-tech-talk-cadus-academy-building-an-open-lea false 2025-12-27T14:00:00+01:00 14:00 00:30 CADUS Skill-Station 39c3-fight-flight-freeze-und-dann-handlungsfahig-bleibe de other Der Crashkurs vermittelt die Basics Psychologischer Erster Hilfe (PFA). Warum sie funktioniert, welche Techniken man nutzen kann, um eigene Resilienz aufzubauen und wie man anderen Menschen damit direkt in akuten Situationen zur Seite stehen kann. If the shit hits the fan, medical first aid can often prevent the situation to get worse. Psychological first aid (PFA) can too. Unfortunately, PFA is not (yet) taught in schools or as an obligatory part of driver's license. With this crash course, we want to pass on evidence-based knowledge about the basics of psychological first aid, as we apply it in our work at CADUS. This is not about therapy, but about initial, relatively simple, almost technical measures to help our brain, our body, our psyche process what we have experienced - for self-protection and to help others. https://events.ccc.de/congress/2025/hub/event/detail/fight-flight-freeze-und-dann-handlungsfahig-bleibe false 2025-12-27T16:00:00+01:00 16:00 00:30 CADUS Skill-Station 39c3-schwere-weste-dichte-maske-wie-sich-schutzkleidung de other In diesem Workshop könnt ihr humanitäre Einsatzkleidung von Plattenträger bis CBRN-Schutzanzug selbst anprobieren, erfahren, wovor sie schützt (und wovor nicht), wie anstrengend sie im Gebrauch ist und warum wir sie im Einsatz nutzen. What does operational gear actually feel like? With us, you can try it on and find out: plate carrier, helmet, ballistic goggles, IFAK — and in the second part, a full CBRN protective suit with mask. We’ll give a short introduction to why we use this equipment in humanitarian missions and what it can realistically do. You’ll be able to try everything on yourself, ask questions, and get a real sense of what this gear protects you from — and what it doesn’t — as well as how exhausting it is to put on and move around in. Photos are absolutely fine, whether it’s for your grandma’s Christmas card or just for fun. Please note: This workshop includes discussion of war, injury, and death. https://events.ccc.de/congress/2025/hub/event/detail/schwere-weste-dichte-maske-wie-sich-schutzkleidung false 2025-12-27T19:00:00+01:00 19:00 00:30 CADUS Skill-Station 39c3-einsatzgepack-alltagskram-ein-gemeinsamer-taschenc de other Ein gemeinsamer Blick in unsere Einsatz-Grab Bags und deinen Hipbag – was wir dabeihaben, warum, und was wir voneinander lernen können. Our grab bag is the pack we can grab in seconds during a mission – filled with the things that carry us through tough moments. And you have your hipbags, packed with clever bits, multitools, and items that become gold in exactly the right minute. We’ll show you what we bring and why – and we’re curious what you carry in your everyday life. What makes you ready for chaos? What’s your favourite tool? https://events.ccc.de/congress/2025/hub/event/detail/einsatzgepack-alltagskram-ein-gemeinsamer-taschenc false 2025-12-27T20:00:00+01:00 20:00 01:00 CADUS Skill-Station 39c3-nasenmusik-fur-fortgeschrittene-schnufflerinnen de, en other Entdecke das wahrscheinlich lustigste Instrument der Welt, die Nasenflöte! Nach einer kurzen Einführung übt jede*r in eigenem Tempo die ersten Töne. Klappt das Tröten, geht’s weiter mit einfachen Melodien – und schließlich spielen wir gemeinsam als Nasenflöten-Orchester beliebte Songs und Wunschmelodien. Lustig, überraschend, musikalisch – und garantiert einmalig! Welcome to what is probably the world's only orchestra where the most important sound-producing instrument is... your nose! Each participant receives a fresh nose flute and easy-to-understand instructions on how to correctly position, breathe, and blow this wondrous instrument. Then it's time to learn by sniffing! Everyone practices at their own pace how to conjure up individual notes cleanly from their nose—from a delicate peep to a confident TOOT. Once everyone has got the hang of it (and the first tears of laughter have dried), we venture into simple sequences of notes that already sound suspiciously like music. And if that works well, it gets really epic: We transform ourselves into a nose flute a cappella orchestra, where everyone can suggest melodies – from children's songs to epic film themes. Together, we make the air vibrate! In short: A workshop full of fun, tooting noises, unexpected talents – and real music from the nose. https://events.ccc.de/congress/2025/hub/event/detail/nasenmusik-fur-fortgeschrittene-schnufflerinnen false 2025-12-27T21:00:00+01:00 21:00 01:00 CADUS Skill-Station 39c3-from-rave-to-rubble-de-elitise-crisis-respons_q0xd de other CADUS is currently active in war zones such as Ukraine, Gaza, and Sudan—but it all started backstage at a music festival. The idea: to rethink humanitarian aid, beyond uniforms, hierarchy, and postcolonial “white charity” logic. Instead, sharing skills, hacking tools, and making knowledge openly accessible—disaster relief as a commons. In this talk, we'll share how a DIY project from the subculture has evolved into an organization that now builds medical infrastructure, tech solutions, and training in crisis areas—with bright minds from different disciplines, open-source hardware, and a lot of improvisation. We talk about what it means to de-elitize humanitarian work: How can we act in conflicts, climate disasters, or collapses without slipping into old power logics? How can practical solidarity be scaled without becoming an NGO apparatus? And what can nerds, makers, and activists contribute in concrete terms when the world is burning? A reality check with hopefully contagious energy for action—from the idea to the reality of deployment. No hero stories, but many lessons learned and open construction sites. Especially with regard to Gaza, Ukraine, Sudan, and the climate crisis, we want to show that the ability to act is not a question of profession, uniform, or mandate—but of collective creativity, technical openness, and solidarity-based courage. https://events.ccc.de/congress/2025/hub/event/detail/from-rave-to-rubble-de-elitise-crisis-respons_q0xd false 2025-12-27T13:45:00+01:00 13:45 00:45 Free Knowledge Habitat 39c3-wikimedia-commons-mehr-als-nur-bilder-fur-wikipedi de Talk Wikimedia Commons ist das Medienarchiv des Wikimedia-Universums. Es ist dabei mehr als nur eine Ablage für Bilder in Wikipedia-Artikeln. Ich gebe eine kurze Einführung in die Funktionsweise des Projekts und wie man es für eigene Projekte nutzen oder dazu beitragen kann. GPSLeo https://events.ccc.de/congress/2025/hub/event/detail/wikimedia-commons-mehr-als-nur-bilder-fur-wikipedi https://pretalx.wikimedia.de/39c3-2025/talk/RRB8VF/ false 2025-12-27T14:45:00+01:00 14:45 00:30 Free Knowledge Habitat 39c3-einfuhrung-in-wikidata de Talk Eine Einführung in Wikidata, die freie Wissensdatenbank. Wikidata ist ein Schwesterprojekt von Wikipedia, Wikimedia Commons und anderen Wikimedia-Projekten, das Linked Open Data (LOD) sammelt und bereitstellt. Hier könnt ihr herausfinden, was es damit auf sich hat und wie man die Daten bearbeiten und verwenden kann. Lucas Werkmeister https://events.ccc.de/congress/2025/hub/event/detail/einfuhrung-in-wikidata https://pretalx.wikimedia.de/39c3-2025/talk/PVSGB7/ false 2025-12-27T15:15:00+01:00 15:15 00:30 Free Knowledge Habitat 39c3-wikidata-introduction_rtp4 en other An introduction to Wikidata, the free knowledge base. Wikidata is a sister project of Wikipedia, Wikimedia Commons and other Wikimedia projects to collect and publish Linked Open Data (LOD). Here yo ucan find out what that means and how you can edit and reuse the data. Lucas Werkmeister https://events.ccc.de/congress/2025/hub/event/detail/wikidata-introduction_rtp4 false 2025-12-27T16:00:00+01:00 16:00 00:30 Free Knowledge Habitat 39c3-wiki-loves-demokratie de Talk Rückblick auf bisher durchgeführte Veranstaltungen und gemeinsamer Ausblick auf kommende Veranstaltungen. Im Jahr 2024 konnten wir den 75. Geburtstag des Grundgesetzes feiern. Anlass genug, um mit “Wiki Loves Demokratie” eine Reihe von Veranstaltungen ins Leben zu rufen, die dazu beitragen will, zum Begriff der Demokratie selbst und zur freiheitlich demokratischen Grundordnung Artikel in der Wikipedia weiter anzureichern und so diese wichtigen Themen noch sichtbarer zu machen. In der Session wollen wir auf die durchgeführten Veranstaltungen zurückblicken und gemeinsam weitere Ideen und Wünsche für zukünftige Veranstaltungen zu “Wiki Loves Demokratie” zusammentragen und sammeln. Wir freuen uns auf den Austausch mit euch! Folien: https://commons.wikimedia.org/wiki/File:24122025_Wiki_Loves_Demokratie_39c3_final.pdf https://pretalx.wikimedia.de/media/39c3-2025/submissions/V3SK8V/Bildschirmfoto_2025-12-22_um_11.47.16_vskk8jA.png Holger Plickert (WMDE) https://events.ccc.de/congress/2025/hub/event/detail/wiki-loves-demokratie https://pretalx.wikimedia.de/39c3-2025/talk/V3SK8V/ false 2025-12-27T19:15:00+01:00 19:15 01:00 Free Knowledge Habitat 39c3-bingo de Workshop Spiele unser jährliches Bingo mit uns! ------ Play our annual bingo with us! Komm vorbei und spiele das allseits bekannte und beliebte Bingo mit uns. ------- Come by and play the annual bingo at the Free Knowledge Habitat with us. Merle Kara https://events.ccc.de/congress/2025/hub/event/detail/bingo https://pretalx.wikimedia.de/39c3-2025/talk/BKHNTR/ false 2025-12-27T20:30:00+01:00 20:30 01:00 Free Knowledge Habitat 39c3-intro-to-sparql-and-wikidata-query-service-en en Workshop The WIkidata Query Service (WDQS) is one of the main services to get data from Wikidata. In this workshop we'll explore the SPARQL query language that allows us to access data as well as the WDQS UI, a helpful UI in which we can write and run queries. The goal is that you'll be able to write your own queries and explore Wikidata's data by the end of the session. The slides for this talk can be found here: https://docs.google.com/presentation/d/1f_depHSZDL73Ba3ZA1L2TG2J_F1o8RwsBfm_2hETYQQ/edit?usp=sharing Andrew McAllister Lucas Werkmeister https://events.ccc.de/congress/2025/hub/event/detail/intro-to-sparql-and-wikidata-query-service-en https://pretalx.wikimedia.de/39c3-2025/talk/RNWUH8/ false 2025-12-27T17:40:00+01:00 17:40 00:50 Bits&Bäume Living Room 39c3-bits-baume-community-meetup de Meetup 50 Minutes Tägliches Meetup zum Netzwerken, gegenseitiges Kennenlernen, Tipps geben. benks https://events.ccc.de/congress/2025/hub/event/detail/bits-baume-community-meetup https://pretalx.freifunktag.de/39c3-bub-workshops-2025/talk/XAVSPA/ false 2025-12-27T19:00:00+01:00 19:00 00:50 Bits&Bäume Living Room 39c3-battlemesh-meetup en Meetup 50 Minutes Meetup for all people involved or interested in the Battlemesh community event, especially regarding the 2026 Battlemesh v18: https://battlemesh.org/BattleMeshV18 battlemesh https://events.ccc.de/congress/2025/hub/event/detail/battlemesh-meetup https://pretalx.freifunktag.de/39c3-bub-workshops-2025/talk/MQDPMH/ true 2025-12-27T20:00:00+01:00 20:00 01:50 Bits&Bäume Living Room 39c3-autonomous-system-as-owner-operator-meetup en Meetup 110 Minutes If you run an AS, lets meetup. After the successful first run last year, let's meet again skorpy https://events.ccc.de/congress/2025/hub/event/detail/autonomous-system-as-owner-operator-meetup https://pretalx.freifunktag.de/39c3-bub-workshops-2025/talk/PJYHVJ/ true 2025-12-27T12:00:00+01:00 12:00 12:00 SegFaultDragons Assembly 39c3-soldering-competition-day-1 de, en other Hand soldering competition This is a smd hand soldering competition - the goal is to solder a Winkekatze with some LED lights in the shortest time possible. Every contestant keeps the board and the overall top 3 win a prize. Contestants are expected to have smd soldering experience - beginners will not be able to finish within 90 minutes. For more details check out the competition's website: https://handsolderingcompetition.de/ https://events.ccc.de/congress/2025/hub/event/detail/soldering-competition-day-1 false 2025-12-27T11:30:00+01:00 11:30 00:55 RopeLabs Assembly 39c3-seile-takeln-fur-anfanger_p947 de other Ich zeige euch zwei Techniken zum takeln von Seilen. Unter Takling versteht sich (unter Anderem) eine Reihe von Nähtechniken, um Seilenden gegen Aufdröseln oder Ausfransen zu sichern. Ich zeige euch zwei Techniken zum takeln von Seilen. Material wird gestellt, eigene Seile können gerne mitgebracht werden. > INFO kluthulhu https://events.ccc.de/congress/2025/hub/event/detail/seile-takeln-fur-anfanger_p947 false 2025-12-27T13:00:00+01:00 13:00 00:55 RopeLabs Assembly 39c3-rope-whippings-for-beginners_1gv6 en other I'll show you two techniques to whip ropes. Whippings are sewing techniques used to secure the ends of ropes against fraying. I'll show you two techniques to whip ropes. Materials will be provided, you are welcome to bring your rope. > INFO kluthulhu https://events.ccc.de/congress/2025/hub/event/detail/rope-whippings-for-beginners_1gv6 false 2025-12-27T20:00:00+01:00 20:00 02:00 KinkyGeeks Assembly 39c3-raven de other Wir basteln Biothane-Handfesseln We will be making a pair of handcuffs out of Biothane that can be connected with a carabiner (see picture). The handcuffs are two-colored with black as the base color. Biothane is a leather-like, vegan material made of PVC-coated webbing that is both waterproof and very sturdy. Advance registration is required, so please stop by the KinkyGeeks-Assembly beforehand to pick up a ticket. [ALREADY SOLD OUT!] There is a material fee of €20 for the workshop. Please bring the exact amount if possible. https://events.ccc.de/congress/2025/hub/https://usercontent.events.ccc.de/congress/2025/hub/usercontent/e/19d7c1b91562/image-2025-12-26-213208.jpg raven (she/her) https://events.ccc.de/congress/2025/hub/event/detail/raven false 2025-12-27T20:30:00+01:00 20:30 01:00 Vegan Chaos Assembly 39c3-vegan-chaos-lets-talk-day-1 de, en other Komm vorbei und lasst uns in unserer Assembly quatschen! Dies ist die Zeit, wo die Community zusammenkommt, wo Interessierte stressfrei Fragen stellen können, oder auch nur einfach ein Getränk miteinander getrunken werden kann. **Come by and let's chat at our assembly!** This is the time when the community comes together, when anyone interested can ask questions in a relaxed atmosphere, or just enjoy a drink together. Like-minded people, curious minds, motivated individuals, interested parties and many more meet here. Let's connect, all creatures are welcome! ### More Information: - To the **[Vegan Chaos Community Assembly](https://events.ccc.de/congress/2025/hub/en/assembly/detail/vegan_chaos)** - Follow us at Mastodon: **[@vegan@chaos.social](//chaos.social/@vegan)** ### Our Events: - 27.12. | 13:00 | Room D | **[Vegan Chaos: Welcome Meet & Greet](https://events.ccc.de/congress/2025/hub/en/event/detail/vegan-chaos-welcome-meet-greet_zdm4)** - 27.12. | 20:30 | Assembly | **[Vegan Chaos: Let's Talk](https://events.ccc.de/congress/2025/hub/en/event/detail/vegan-chaos-lets-talk-day-1)** - 28.12. | 11:30 | Assembly | **[Vegan Chaos: Let's Talk](https://events.ccc.de/congress/2025/hub/en/event/detail/vegan-chaos-lets-talk-day-2)** - 29.12. | 13:00 | Room D | **[Vegan Chaos: Bring-Along Fingerfood Brunch](https://events.ccc.de/congress/2025/hub/en/event/detail/vegan-chaos-bring-along-fingerfood-brunch)** - 29.12. | 18:30 | Assembly | **[Vegan Chaos: Let's Talk](https://events.ccc.de/congress/2025/hub/en/event/detail/vegan-chaos-lets-talk-day-3)** - 30.12. | 11:00 | Room 6 | **[Vegan Chaos: Farewell Meeting](https://events.ccc.de/congress/2025/hub/en/event/detail/vegan-chaos-farewell-meeting)** https://events.ccc.de/congress/2025/hub/https://usercontent.events.ccc.de/congress/2025/hub/usercontent/e/0ab2619dbe14/39C3veganchaos.png ganzesaetze (he/him) https://events.ccc.de/congress/2025/hub/event/detail/vegan-chaos-lets-talk-day-1 false 2025-12-27T12:00:00+01:00 12:00 02:00 Haecksen-Assembly 39c3-computational-reproducibility-best-practices-for-w en Workshop long An interactive workshop for those who regularly deal with research code. We'll discuss lessons learned, reflect on our work and use our combined experiences to develop a list of best practices for writing, documenting & publishing software for research projects. Are you a researcher who writes code? An intimidated grad student who's scrambling to learn R or Python? Or maybe a software developer who works with researchers? Whether you're just starting out or have been doing this for decades, this workshop is for you. Let's come together to share our experiences – the horror stories, a-ha moments and imposter-syndrome-induced doubts – with writing, documenting, publishing, and reusing research code. Modern research often depends on patchworks of custom code, organically grown over the lifespan of a project. Scripts written on the fly, evolving as questions change and deadlines loom. Many, if not most, of us never received any formal training to write code that others (or even just our future self) could actually understand and use. Instead, we learn by trial and error – and, most importantly, from each other. Take this workshop as an opportunity to share what you know, help out others and learn a few new tricks. Together, we'll: - Define what "computational reproducibility" means to us - Discuss our experiences producing and reusing research code - Reflect on how the daily work of researchers has changed and what constraints we face - Share what strategies and tools have worked for us in the past The goal is to develop a set of community guidelines or best practices for working with research code that are applicable and accessible across disciplines and backgrounds. --- Note: - This workshop aims to center perspectives from marginalized folks whose voices frequently go unheard in academia. If that includes you, your participation is especially valued. - This session can also be held in German if all participants speak German. Luke https://events.ccc.de/congress/2025/hub/event/detail/computational-reproducibility-best-practices-for-w https://pretalx.c3voc.de/39c3-haecksen-workshops-2025/talk/SEE7EJ/ https://pretalx.c3voc.de/39c3-haecksen-workshops-2025/talk/SEE7EJ/feedback/ false 2025-12-27T13:00:00+01:00 13:00 00:30 Fediverse shared table 39c3-ende-des-haftungsprivilegs-fur-hosting-provider-wa de other At the beginning of December, the European Court of Justice ruled that online marketplaces are liable for data protection violations committed by their users, regardless of whether they took timely action against them. The liability privilege for hosting providers does not apply to violations of the GDPR. Online marketplaces and their users are jointly responsible. Providers are therefore required to verify the identity of users and their content in advance. Does this spell the end for the Fediverse? We take a look at the ruling together and discuss what it means for instance operators in the Fediverse. https://events.ccc.de/congress/2025/hub/https://usercontent.events.ccc.de/congress/2025/hub/usercontent/e/acb8ef51e0b3/Unbenannt.jpg firefly https://events.ccc.de/congress/2025/hub/event/detail/ende-des-haftungsprivilegs-fur-hosting-provider-wa false 2025-12-27T17:15:00+01:00 17:15 00:45 Fediverse shared table 39c3-advocacy-for-the-social-web de, en other There are currently numerous initiatives promoting open social networks and digital infrastructures that serve the common good. We would like to introduce some of them and discuss with you the political demands that were published this year. https://events.ccc.de/congress/2025/hub/https://usercontent.events.ccc.de/congress/2025/hub/usercontent/e/c0538a09dfb8/fedi39c3.png samvie https://events.ccc.de/congress/2025/hub/event/detail/advocacy-for-the-social-web false 2025-12-27T20:00:00+01:00 20:00 00:30 Fediverse shared table 39c3-research-on-fedi-integration-in-public-administrat en other Content warning! Expect a rather ‘erotic’ reading of stories based on extracts of our research, brewed by a quirky mind. This is a reading of some red-tape-diary stories, based on FediVariety’s deep package inspection on the EDPS’s ‘EU Voice/Video’ pilot project—but with a juicy twist! Every character is real, each event actually happened, and all quotes are genuine. However, all of this will be ridiculously tweaked. Views are very personal, none of the involved (EU) organisations or individuals accept any liability for damage of any kind resulting from the risks inherent in the erotic transmission of messages. https://events.ccc.de/congress/2025/hub/https://usercontent.events.ccc.de/congress/2025/hub/usercontent/e/d72f854e377f/FediVariety_logo__text_black_small.jpg ZZEPPOSS (CPT.) https://events.ccc.de/congress/2025/hub/event/detail/research-on-fedi-integration-in-public-administrat false 2025-12-27T15:00:00+01:00 15:00 01:00 cyber4EDU und Datenschutzheinis Assembly (c4E-Roundtable) 39c3-edu-meet-up-du-machst-was-im-bildungsbereich-komm- de other Dieses Meet-Up ist für alle gedacht, die was im Bildungsbereich machen. Lehrer*\innen, Schulleitungen, Pädagogische Fachkräfte, Sozialarbeiter*\innen, Inklusionsbeauftragte, Personen in der Lehrer*\innen(aus)bildung, Fortbildner*\innen, ... Dieses Treffen soll zur Vernetzung dienen. ggf. auch um gemeinsam im Programm zu schauen, was es Spannendes zum Thema Bildung beim 39C3 gibt oder auch einfach, um sich darüber auszutauschen, wo im (Hoch)Schul-Alltag der Schuh drückt. Die letzten Jahre lief das Treffen mal unter #Leherzimmer, #Twitterlehrerzimmer, #cyberLZ, ... https://events.ccc.de/congress/2025/hub/https://usercontent.events.ccc.de/congress/2025/hub/usercontent/e/fd894d6668e1/cyber4EDU_Logo_2048.png MoniKa (c4E) (she/her) pnrd https://events.ccc.de/congress/2025/hub/event/detail/edu-meet-up-du-machst-was-im-bildungsbereich-komm- false 2025-12-27T16:00:00+01:00 16:00 01:30 Kidspace - Basteltische 39c3-nerds-spielen-spiele-tag-1 de, en other Nerds spielen Spiele Du hast gerade nichts zu tun, brauchst eine kleine Entspannungszeit oder suchst einfach ein wenig Spaß mit anderen? Spiel doch einfach mit! Jeder ist willkommen! Denn was tun Nerds, wenn sie gerade nichts hacken? Sie spielen Spiele! monsterchen https://events.ccc.de/congress/2025/hub/event/detail/nerds-spielen-spiele-tag-1 false 2025-12-27T14:00:00+01:00 14:00 02:00 Kidspace - Tisch vor Saal B 39c3-geschichten-erzahlen-tag-1-waldwesen-grusel-und-ge de other Waldwesen (Grusel und Geheimnis) Es ist Winter. Der erste Schnee ist gefallen. Und da steht ein Monster vor der Tür und es bringt Geschenke. (Rollenspiel ohne Regelsystem, 2 Stunden, bis zu 6 Leute, auf Deutsch) Cisz (er, he) https://events.ccc.de/congress/2025/hub/event/detail/geschichten-erzahlen-tag-1-waldwesen-grusel-und-ge false 2025-12-27T16:00:00+01:00 16:00 01:00 Kidspace - Tisch vor Saal B 39c3-papierbasteln-tag-1 other Eine kleine Hütte im Schnee (1 Stunde, Material und Werkzeug sind vorhanden) Cisz (er, he) https://events.ccc.de/congress/2025/hub/event/detail/papierbasteln-tag-1 false 2025-12-27T11:00:00+01:00 11:00 05:00 Kidspace - Elektrotisch 39c3-elektrobausteine-tag-1 de, en other Elektrobausteine/Electric circuits with building blocks Make light sound or mechanical circuits. The electronic building blocks from OEM Dbolo are not only especially child-friendly due to their simple push-button connections but also a lot of fun for all ages. They are distributed by various brands, including "Kosmos Easy" and "Elenco Snap Circuits." No prior knowledge of electricity is required, but beware - learning something might happen! This is an open parent-child activity. Learn, build, and play together, and take care for arguments and that the parts don’t fall on the floor. Teenagers and adults are also welcome without child accompaniment. ;-) https://events.ccc.de/congress/2025/hub/event/detail/elektrobausteine-tag-1 false 2025-12-27T14:00:00+01:00 14:00 01:00 FNF Assembly 39c3-datarequestsorg-office-hours-we-answer-your-gdpr-r en Help desk Have you encountered problems with a data subject request? You think think someone is processing your data illegally and you want help filing a report? Or you want to volunteer with datarequests.org and want some help getting started? Meet up with us to talk data protection and how to make use of the GDPR, while we still can. Note: Due to German law, when it comes to specific advice, we need to refer you to a lawyer. But we can give you general advice and exchange experiences. Lorenz Benni https://events.ccc.de/congress/2025/hub/event/detail/datarequestsorg-office-hours-we-answer-your-gdpr-r https://fnf-39c3-pretalx.my-server.in/fnf-at-39c3-2025/talk/FHWUYW/ https://fnf-39c3-pretalx.my-server.in/fnf-at-39c3-2025/talk/FHWUYW/feedback/ false 2025-12-27T15:00:00+01:00 15:00 00:30 CADUS WASH-Station 39c3-wash-sprechstunde de, en other CADUS WASH-Station – Water, Sanitation and Hygiene Ein kompakter Einblick in Wasseraufbereitung im Einsatz: Mit Wasserfiltersystem, kleinem Wasserlabor und kurzen WASH Sprechstunden. Zum Anschauen, Anfassen und Fragenstellen. Kommt zu unseren regelmäßigen WASH-Sprechstunden vorbei, stellt eure Fragen, und bekommt einen praktischen Einblick in einfache Wasseraufbereitungs- und Hygienelösungen im Einsatz. https://events.ccc.de/congress/2025/hub/event/detail/wash-sprechstunde false 2025-12-28T11:00:00+01:00 11:00 01:00 One 39c3-protecting-the-network-data-of-one-billion-people-breaking-network-crypto-in-popular-chinese-mobile-apps en Security Talk In this talk, I will describe how my team and I systematically exploited around a dozen home-rolled network encryption protocols used by popular mobile apps like RedNote, Alipay, and some of the most popular mobile browsers in China to encrypt sensitive information. I'll demonstrate how network eavesdroppers could access users' browsing history and mobile activity. This is a systemic issue; despite our work on the above protocols and the resulting vulnerability disclosures, this plague of home-rolled and proprietary encryption is still at large. I will end by discussing how we got here, re-affirm the age-old adage, “Don’t roll your own crypto!”, and call on hackers around the world to help us move towards HTTPS everywhere. TLS is not as universal as we might think. Applications with hundreds of millions of active users continue to use insecure, home-rolled proprietary network encryption to protect sensitive user data. This talk demonstrates that this is a widespread and systemic issue affecting a large portion of the most popular applications in the world. These issues are particularly concentrated in mobile applications developed in China, which have been overlooked by the global security community despite their massive popularity and influence. We found that 47.6% of top Mi Store applications used proprietary network cryptography without any additional encryption, compared to only 3.51% of top Google Play Store applications. We analyzed the most popular of these protocols, including cryptosystems designed by Alibaba, iQIYI, Kuaishou, and Tencent. Of the top 9 protocol families, we discovered vulnerabilities in 8 that allowed network eavesdroppers to decrypt underlying data. We also discovered additional vulnerabilities in several other protocols used by apps with hundreds of millions of users. Through the vulnerabilities fixed as a result of this work, this research has directly improved the network security of up to one billion people. However, there were hundreds more proprietary protocols used by popular applications that we discovered. Verifying all of their security through manual reverse-engineering and vulnerability reporting is not feasible at this scale. What can we do as a community to fix this systemic issue and prevent such failures from occurring in the future? Mona https://events.ccc.de/congress/2025/hub/event/detail/protecting-the-network-data-of-one-billion-people-breaking-network-crypto-in-popular-chinese-mobile-apps https://cfp.cccv.de/39c3/talk/78KFYJ/ https://cfp.cccv.de/39c3/talk/78KFYJ/feedback/ true 2025-12-28T12:15:00+01:00 12:15 01:00 One 39c3-skynet-starter-kit-from-embodied-ai-jailbreak-to-remote-takeover-of-humanoid-robots en Security Talk We present a comprehensive security assessment of Unitree's robotic ecosystem. We identified and exploited multiple security flaws across multiple communication channels, including Bluetooth, LoRa radio, WebRTC, and cloud management services. Besides pwning multiple traditional binary or web vulnerabilities, we also exploit the embodied AI agent in the robots, performing prompt injection and achieve root-level remote code execution. Furthermore, we leverage a flaw in cloud management services to take over any Unitree G1 robot connected to the Internet. By deobfuscating and patching the customized, VM-based obfuscated binaries, we successfully unlocked forbidden robotic movements restricted by the vendor firmware on consumer models such as the G1 AIR. We hope our findings could offer a roadmap for manufacturers to strengthen robotic designs, while arming researchers and consumers with critical knowledge to assess security in next-generation robotic systems. Unitree is among the highest-volume makers of commercial robots, and their newest humanoid platforms ship with multiple control stacks and on-device AI agents. If the widespread, intrusive presence of these robots in our lives is inevitable, should we take the initiative to ensure they are completely under our control? What paths might attackers use to compromise these robots, and to what extent could they threaten the physical world? In this talk, we first map the complete attack surface of Unitree humanoids, covering hardware interfaces, near-field radios and Internet-accessible channels. We demonstrate how a local attacker can hijack a robot by exploiting vulnerabilities in short-range radio communications (Bluetooth, LoRa) and local Wi-Fi. We also present a fun exploit of the embodied AI in the humanoid: With a single spoken/text sentence, we jailbreak the on-device LLM Agent and pivot to root-priviledged remote code execution. Combined with a flaw in the cloud management service, this forms a full path to gain complete control over any Unitree robot connected to the Internet, obtaining root shell, camera livestreaming, and speaker control. To achieve this, we combined hardware inspection, firmware extraction, software-defined radio tooling, and deobfuscation of customized, VM-based protected binaries. This reverse engineering breakthrough also allowed us to understand the overall control logic, patch decision points, and unlock advanced robotic movements that were deliberately disabled on consumer models like G1 AIR. Takeaways. Modern humanoids are networked, AI-powered cyber-physical systems; weaknesses across radios, cloud services, and on-device agents could allow attackers to remotely hijack robot operations, extract sensitive data or camera livestreams, or even weaponize the physical capabilities. As robotics continue their transition from controlled environments to everyday applications, our work highlights the urgent need for security-by-design in this emerging technology landscape. Shipei Qu Zikai Xu Xuangan Xiao https://events.ccc.de/congress/2025/hub/event/detail/skynet-starter-kit-from-embodied-ai-jailbreak-to-remote-takeover-of-humanoid-robots https://cfp.cccv.de/39c3/talk/DD3S7F/ https://cfp.cccv.de/39c3/talk/DD3S7F/feedback/ false 2025-12-28T13:30:00+01:00 13:30 01:00 One 39c3-a-post-american-enshittification-resistant-internet en Ethics, Society & Politics Talk Trump has staged an unscheduled, midair rapid disassembly of the global system of trade. Ironically, it is this system that prevented all of America's trading partners from disenshittifying their internet: the US trade representative threatened the world with tariffs unless they passed laws that criminalized reverse-engineering and modding. By banning "adversarial interoperability," America handcuffed the world's technologists, banning them from creating the mods, hacks, alt clients, scrapers, and other tools needed to liberate their neighbours from the enshittificatory predations of the ketamine-addled zuckermuskian tyrants of US Big Tech. Well, when life gives you SARS, you make sarsaparilla. The Trump tariffs are here, and it's time to pick the locks on the those handcuffs and set the world's hackers loose on Big Tech. Happy Liberation Day, everyone! Enshittification wasn't an accident. It also wasn't inevitable. This isn't the iron laws of economics at work, nor is it the great forces of history. Enshittification was a choice: named individuals, in living memory, enacted policies that created the enshittogenic environment. They created a world that encouraged tech companies to merge to monopoly, transforming the internet into "five giant websites, each filled with screenshots of the other four." They let these monopolists rip us off and spy on us. And they banned us from fighting back, claiming that anyone who modified a technology without permission from its maker was a pirate (or worse, a terrorist). They created a system of "felony contempt of business-model," where it's literally a crime to change how your own devices work. They declared war on the general-purpose computer and demanded a computer that would do what the manufacturer told it to do (even if the owner of the computer didn't want that). We are at a turning point in the decades-long war on general-purpose computing. Geopolitics are up for grabs. The future is ours to seize. In my 24 years with EFF, I have seen many strange moments, but never one quite like this. There's plenty of terrifying things going on right now, but there's also a massive, amazing, incredibly opportunity to seize the means of computation. Let's take it. ' https://cfp.cccv.de/media/39c3/submissions/TTQVKM/trump-big-tech_lzS3fBk_09adc3T_ZylDT8f_WtNY76g.webp Cory Doctorow https://events.ccc.de/congress/2025/hub/event/detail/a-post-american-enshittification-resistant-internet The slides for my talk (these are just images, no text) https://cfp.cccv.de/39c3/talk/TTQVKM/ https://cfp.cccv.de/39c3/talk/TTQVKM/feedback/ false 2025-12-28T14:45:00+01:00 14:45 00:40 One 39c3-chaospager-how-to-construct-an-open-pager-system-for-c3 en Hardware Talk In this talk, we will give an introduction into the project (i.e. how it all started at 38c3 and why we are here now), provide an in-depth review of how the development process of our pager worked and what our future goals are. In our introduction, we will talk about the origin and exploration phase of the inital pager idea (i.e. how we went from the idea of bringing POCSAG Pager transmitter to 38c3, over a cable-bound prototype, to a first working pager on a proper PCB). We will also present our plans of connecting our POCSAG transmitter infrastructure to THOT (CERTs own dispatch software). For our in-depth review about the project, we explain how we encountered major reception problems, how we analyzed them at easterhegg22 and conducted experiments there, and why we are opting for a custom HF frontend design instead of an already-made one from chinese vendors. Moreover, we provide an overview of our transmitter devices and give some advice on how to replicate those. Lastly, we will discuss further challenges and what our next goals are. If we are reaching our milestone until 39c3, we will also give a live demo of the system. At 38c3, we conducted an experiment to test out our self-built POCSAG Pager infrastructure. Together with DL0TUH and CERT, we are now working on an open pager solution leveraging well-known components in the maker commmunity (e.g. ESP32, SX1262) to support the alarming of action forces at c3 events. In this talk, we will guide you through the process of developing such a project, problems that are occuring and what our future plans are. Max Julian https://events.ccc.de/congress/2025/hub/event/detail/chaospager-how-to-construct-an-open-pager-system-for-c3 https://cfp.cccv.de/39c3/talk/FWPGUZ/ https://cfp.cccv.de/39c3/talk/FWPGUZ/feedback/ false 2025-12-28T15:40:00+01:00 15:40 00:40 One 39c3-cracking-open-what-makes-apple-s-low-latency-wifi-so-fast en Hardware Talk This talk presents Apple's link-layer protocol Low-Latency WiFi and how it achieves its real-time capabilities to enable Continuity features like Sidecar Display and Continuity Camera. We make more kernel logging available on iOS and build a log aggregator that combines and aligns system- and network-level log sources from iOS and macOS. Apple's Continuity features make up a big part of their walled garden. From AirDrop and Handoff to AirPlay, they all connect macOS and iOS devices wirelessly. In recent years, security researchers have opened up several of these features showing that the Apple ecosystem is technically compatible with third-party devices. In this talk, we present the internal workings of Low-Latency WiFi (LLW) – Apple's link-layer protocol for several real-time Continuity features like Continuity Camera and Sidecar Display. We talk about the concepts behind LLW, how it achieves its low-latency requirement and how we got there in the reverse engineering process. We also present the tooling we built to enable more kernel-level tracing and logging on iOS through a reimplementation of cctool from macOS and the source code of trace that was buried deep inside of Apple’s open-source repository system_cmds. We build a log aggregator that combines various kernel- and user-space traces, log messages and pcap files from both iOS and macOS into a single file and finally investigate the network stack on Apple platforms that is implemented in both user- and kernel space. There we find interesting configuration values of LLW that make it the go-to link-layer protocol for Apple's proprietary real-time Continuity applications. Henri Jäger https://events.ccc.de/congress/2025/hub/event/detail/cracking-open-what-makes-apple-s-low-latency-wifi-so-fast https://cfp.cccv.de/39c3/talk/ASKJYB/ Slides https://cfp.cccv.de/39c3/talk/ASKJYB/feedback/ false 2025-12-28T16:35:00+01:00 16:35 01:40 One 39c3-ccc-jahresruckblick de CCC & Community Talk Das war nicht das Jahr 2025, das wir bestellt hatten. 2025 war ein gutes Jahr für Exploits, kein gutes Jahr für die Freiheit und ein herausragendes für schlechte Ideen. Regierungen kämpften weiter für Massenüberwachung, natürlich mit KI-Unterstützung™. Kriege wurden weiter „digitalisiert“, Chatkontrolle als Kinderschutz verkauft, Waffensysteme haben inzwischen mehr Autonomie als die meisten Bürger*innen und künstliche Intelligenz löst endlich alle Probleme – vor allem die, die bisher niemand hatte. https://cfp.cccv.de/media/39c3/submissions/7AA9FV/Sterntastatur_b09fvBS_bTzYiGV_ab20Ner_hdByi2G.webp Constanze Kurz khaleesi Matthias Marx Linus Neumann erdgeist https://events.ccc.de/congress/2025/hub/event/detail/ccc-jahresruckblick https://cfp.cccv.de/39c3/talk/7AA9FV/ https://cfp.cccv.de/39c3/talk/7AA9FV/feedback/ false 2025-12-28T19:15:00+01:00 19:15 00:40 One 39c3-in-house-electronics-manufacturing-from-scratch-how-hard-can-it-be en Hardware Talk Why is electronics manufacturing hard? Can it ever be made easy and more accessible? What will it take to relocate industrial production to Europe? We share with you what we learned when we spent more than 1 year setting up our own production line in our office in Hamburg. Turns out a lot of the difficulties are rarely talked about or hidden behind "manufacturing is high CAPEX". Come and learn with us the nitty gritty details of batch reflow ovens, stencil printing at scale, and how OpenPnP is a key enabler in our process. While we are far from done with this work, we hope to see others replicate it and collectively reclaim the ownership of the means of electronics production. Our industry needs a reboot as well, it no longer serves the people. Our work is based on our belief that high-quality high-mix/low volume manufacturing of electronics in Europe is economically viable and accessible to small companies with a lower-than-expected up-front investment. We believe that relocation of industry to Europe depends on small innovative companies, and will not come from slow and bloated industry giants whose products are victims of enshittification and maximum profit extraction. By using open-source hardware and software whenever possible, we are attempting to set up our own production operation in Hamburg and we want to share the solutions and enable others to do the same and collectively reclaim ownership of the means of production. We will cover: - How we acquired and set up production machines, their costs, and our learnings - Quirks of paste printing and reflow soldering at scale (up to 50 batches a day) - Component inventory, tracking, DfM, etc. - How OpenPnP is a key enabler of our prcesses - Our proposed changes to OpenPnP - Our work integrated Siemens Siplace Feeders in OpenPnP Check out our ressources on the topic at https://eilbek-research.de/blog/thank-you-for-attending-our-talk-at-39c3/ https://cfp.cccv.de/media/39c3/submissions/V9PXC3/pnp-w-mrk_smF9l2Y_GKMot5v_cCPoueV_3FlIB_nC9mgoM.webp Augustin Bielefeld Alexander Willer https://events.ccc.de/congress/2025/hub/event/detail/in-house-electronics-manufacturing-from-scratch-how-hard-can-it-be https://cfp.cccv.de/39c3/talk/V9PXC3/ Slides from the talk https://cfp.cccv.de/39c3/talk/V9PXC3/feedback/ false 2025-12-28T20:10:00+01:00 20:10 00:40 One 39c3-freiheit-exe-utopien-als-malware de Art & Beauty Theater / Performance "freiheit.exe“ ist eine Lecture über die ideologischen Rootkits des Silicon Valley. Sie schlägt den Bogen von den italienischen Futuristen zu den heutigen Tech-Feudalisten, vom Akzelerationismus zur Demokratieskepsis der Libertären, von Tolkien zur PayPal-Mafia. Basierend auf den Recherchen zu meinem Theaterstück "freiheit.exe. Utopien als Malware", in dem journalistische Analyse auf performative Darstellung trifft. Ich lade das CCC-Publikum ein, die Betriebssysteme hinter unseren Betriebssystemen zu untersuchen. Während wir uns mit Verschlüsselung, Datenschutz und digitaler Selbstbestimmung beschäftigen, installieren Tech-Milliardäre ihre Weltanschauungen als Default-Einstellungen unserer digitalen Infrastruktur. Die Recherchen beleuchten die mitgelieferte Malware. Ich navigiere durch die Ideengeschichte zwischen Marinettis Futuristischem Manifest (1909) und Musks Mars-Kolonien, von den ersten Programmiererinnen zur Eroberung des Alls, von neoliberalen Think Tanks zur Schuldenbremse, von nationalen Christen zu Pronatalisten. Investigative Recherche trifft auf performative Vermittlung. Mit O-Tönen von Peter Thiel, Nick Land und anderen zeigt die Lecture ideologische Verbindungslinien zwischen Theoretikern autoritär-technoider Träume und den Visionen der Tech-Oligarchen auf: Es geht um „Freedom Cities“, Steuerflucht und White Supremacy. Um Transhumanismus als Upgrade-Zwang bis hin zu neo-eugenischen Gedanken. Um Akzeleration als politische Strategie: Geschwindigkeit statt Reflexion, Disruption statt Demokratie, Kolonisierung – jetzt auch digital. Aus Theaterperspektive betrachte ich das Revival der Cäsaren und die Selbstinszenierung von Tech-CEOs als Künstler, Priester oder Genies. Und mit der Investigativ Reporterin Sylke Grunwald habe ich recherchiert, was all das mit den Debatten rund um Palantir zu tun hat. Die scheinbar alternativlose Logik von "Move Fast and Break Things" ist nicht unvermeidlich – sie ist gewollt, gestaltet, ideologisch aufgeladen. https://cfp.cccv.de/media/39c3/submissions/MNXRET/freiheit.exe_Utopien_als_Malware_Qmt6KDl.jpg Christiane Mudra https://events.ccc.de/congress/2025/hub/event/detail/freiheit-exe-utopien-als-malware https://cfp.cccv.de/39c3/talk/MNXRET/ https://cfp.cccv.de/39c3/talk/MNXRET/feedback/ false 2025-12-28T21:05:00+01:00 21:05 00:40 One 39c3-verlorene-domains-offene-turen-was-alte-behordendomains-verraten de Security Talk Was passiert, wenn staatliche Domains auslaufen - und plötzlich jemand anderes sie besitzt? In diesem Vortrag wird berichtet, wie mehrere ehemals offizielle, aber unregistrierte Domains deutscher Bundesministerien und Behörden erworben werden konnten - und welche Datenströme dadurch sichtbar wurden. Über Monate hinweg konnten so DNS-Anfragen aus Netzen des Bundes empfangen werden - ein erhebliches Sicherheitsrisiko. Unter anderem da es so möglich war Accounts zu übernehmen, Validierungen von E-Mailsignaturen zu manipulieren, Anfrage umzuleiten und im Extremfall Code auf Systemen auszuführen. (Keine sensiblen Daten werden veröffentlicht; der Fokus liegt auf Forschung, Aufklärung und verantwortungsvollem Umgang mit den Ergebnissen.) Im Rahmen der Untersuchung zeigten sich nicht nur Fehlkonfigurationen, sondern auch Phänomene wie Bitsquatting und Typoquatting innerhalb der Verwaltungsnetze. Mit dem Betrieb eines DNS-Servers und dem Erwerb von bund.ee (naher Typosquatting/Bitquatting zu bund.de) konnten u.a. zahlreiche DNS-Anfragen von Servern des Bundesministerium des Innern (BMI) und weiterer Einrichtungen des Bundes empfangen werden. Der Vortrag beleuchtet die technischen und organisatorischen Schwachstellen, die hinter solchen Vorgängen stehen - und zeigt, wie DNS-Details Einblicke in die IT-Infrastruktur des Staates ermöglichen können. Abgerundet wird das Ganze durch praktische Beispiele, Datenanalysen und Empfehlungen, wie sich ähnliche Vorfälle künftig vermeiden lassen. In anderen Ländern sind gov-Domains als TLDs längst üblich (bspw. gov.uk) - in Deutschland ist bund.de oder gov.de allerdings nicht so verbreitet wie man glaubt, unter anderem da Bundesministerien eigene Domains nutzen oder nach Regierungsbildung umbenannt werden. Tim Philipp Schäfers (TPS) https://events.ccc.de/congress/2025/hub/event/detail/verlorene-domains-offene-turen-was-alte-behordendomains-verraten https://cfp.cccv.de/39c3/talk/3GESDB/ https://cfp.cccv.de/39c3/talk/3GESDB/feedback/ false 2025-12-28T22:05:00+01:00 22:05 00:40 One 39c3-don-t-look-up-there-are-sensitive-internal-links-in-the-clear-on-geo-satellites en Security Talk We pointed a commercial-off-the-shelf satellite dish at the sky and examined all of the geostationary satellite communications visible from our vantage point. A shockingly large amount of sensitive traffic is being broadcast unencrypted, including critical infrastructure, internal corporate and government communications, private citizens’ voice calls and SMS, and consumer Internet traffic from in-flight wifi and mobile networks. In this talk, we will cover our hardware setup, alignment techniques, our parsing code, and survey some of the surprising finds in the data. This talk will include some previously unannounced results. This data can be passively observed by anyone with a few hundred dollars of consumer-grade hardware. There are thousands of geostationary satellite transponders globally, and data from a single transponder may be visible from an area as large as 40% of the surface of the earth. https://cfp.cccv.de/media/39c3/submissions/CBZFN3/dontlookup_gmsM0KU_vzlCw8a_pVqWDLz_kuN6YIc.webp Nadia Heninger Annie Dai https://events.ccc.de/congress/2025/hub/event/detail/don-t-look-up-there-are-sensitive-internal-links-in-the-clear-on-geo-satellites Project Web Page https://cfp.cccv.de/39c3/talk/CBZFN3/ Presentation Slides https://cfp.cccv.de/39c3/talk/CBZFN3/feedback/ false 2025-12-28T23:00:00+01:00 23:00 00:40 One 39c3-xous-a-pure-rust-rethink-of-the-embedded-operating-system en Hardware Talk Xous is a message-passing microkernel implemented in pure Rust, targeting secure embedded applications. This talk covers three novel aspects of the OS: hardware MMU support (and why we had to make our own chip to get this feature), how and why we implemented the Rust standard library in Rust (instead of calling the C standard library, like most other Rust platforms), and how we combine the power of Rust semantics with virtual memory to create safe yet efficient asynchronous messaging primitives. We conclude with a short demo of the OS running on a new chip, the "Baochip-1x", which is an affordable, mostly-open RTL SoC built in 22nm TSMC, configured expressly for running Xous. The world is full of small, Internet-of-Things (IoT) gadgets running embedded operating systems. These devices generally fall into two categories: larger devices running a full operating system using an MMU which generally means Linux, or smaller devices running without an MMU using operating systems like Zephyr, chibios, or rt-thread, or run with no operating system at all. The software that underpins these projects is written in C with coarse hardware memory protection at best. As a result, these embedded OSes lack the security guarantees and/or ergonomics offered by modern languages and best practices. The Xous microkernel borrows concepts from heavier operating systems to modernize the embedded space. The open source OS is written in pure Rust with minimal dependencies and an emphasis on modularity and simplicity, such that a technically-savvy individual can audit the code base in a reasonable period of time. This talk covers three novel aspects of the OS: its incorporation of hardware memory virtualization, its pure-Rust standard library, and its message passing architecture. Desktop OSes such as Linux require a hardware MMU to virtualize memory. We explain how ARM has tricked us into accepting that MMUs are hardware-intensive features only to be found on more expensive “application” CPUs, thus creating a vicious cycle where cheaper devices are forced to be less safe. Thanks to the open nature of RISC-V, we are able to break ARM’s yoke and incorporate well-established MMU-based memory protection into embedded hardware, giving us security-first features such as process isolation and encrypted swap memory. In order to make Xous on real hardware more accessible, we introduce the Baochip-1x, an affordable, mostly-open RTL 22nm SoC configured expressly for the purpose of running Xous. The Baochip-1x features a Vexriscv CPU running at 400MHz, 2MiB of SRAM, 4MiB of nonvolatile RRAM, and a quad-core RV32E-derivative I/O accelerator called the “BIO”, based on the PicoRV clocked at 800MHz. Most Rust targets delegate crucial tasks such as memory allocation, networking, and threading to the underlying operating system’s C standard library. We want strong memory safety guarantees all the way down to the memory allocator and task scheduler, so for Xous we implemented our standard library in pure Rust. Adhering to pure Rust also makes cross-compilation and cross-platform development a breeze, since there are no special compiler or linker concerns. We will show you how to raise the standard for “Pure Rust” by implementing a custom libstd. Xous combines the power of page-based virtual memory and Rust’s strong borrow-checker semantics to create a safe and efficient method for asynchronous message passing between processes. This inter-process communication model allows for easy separation of different tasks while keeping the core kernel small. This process maps well onto the Rust "Borrow / Mutable Borrow / Move" concept and treats object passing as an IPC primitive. We will demonstrate how this works natively and give examples of how to map common programming algorithms to shuttle data safely between processes, as well as give examples of how we implement features such as scheduling and synchronization primitive entirely in user space. We conclude with a short demo of Xous running on the Baochip-1x, bringing Xous from the realm of emulation and FPGAs into everyday-user accessible physical silicon. bunnie Sean "xobs" Cross https://events.ccc.de/congress/2025/hub/event/detail/xous-a-pure-rust-rethink-of-the-embedded-operating-system https://cfp.cccv.de/39c3/talk/3CCTFB/ https://cfp.cccv.de/39c3/talk/3CCTFB/feedback/ false 2025-12-28T23:55:00+01:00 23:55 00:40 One 39c3-code-to-craft-procedural-generation-for-the-physical-world en Art & Beauty Talk Join bleeptrack for a deep dive into the fascinating world of procedural generation beyond the screen. From stickers and paper lanterns to PCBs, furniture, and even physical procedural generators, this talk explores the challenges and creative possibilities of bringing generative projects into tangible form. In this talk, I will share practical insights from developing procedural generation tools for physical objects: ranging from stickers and paper lanterns to printed circuit boards and even furniture. I will outline key challenges and considerations when generating designs for fabrication tools such as laser cutters or pen plotters, as well as how to adapt procedural systems so they can be reproduced by a wide audience (not everyone has access to CNC machines or industrial equipment, sadly!). Beyond technical considerations, I aim to encourage attendees to translate their own generative ideas into tangible artifacts and to foster a culture of open-sourcing and knowledge sharing within the community. bleeptrack https://events.ccc.de/congress/2025/hub/event/detail/code-to-craft-procedural-generation-for-the-physical-world https://cfp.cccv.de/39c3/talk/37CQQE/ https://cfp.cccv.de/39c3/talk/37CQQE/feedback/ false 2025-12-29T01:00:00+01:00 01:00 01:30 One 39c3-gptdash-der-reverse-turing-test de Entertainment Game show KIs (bzw. LLMs) wirken immer menschlicher. Schon längst ist es schwer bis unmöglich zu erkennen, ob ein Text von einer KI oder einem Menschen geschrieben wurde. Maschinen dringen immer mehr in den menschlichen Diskurs ein. Wir wollen das nicht länger hinnehmen und drehen den Spieß um. In unserem Reverse-Turing-Test schlüpfen die Teilnehmenden in die Rolle einer KI und versuchen so robotisch-menschlich wie möglich zu klingen. In einer anschließenden Blindstudie prüfen wir, wer sich am besten unter KIs mischen und beim nächsten Robot Uprising die Spionin der Wahl wäre. Humor, Kreativität und ein Hang zu allgemeingültigen, nichtssagenden Floskeln sind die perfekten Voraussetzungen! Ein digitales Endgerät (Smartphone, Tablet, Laptop, …) reicht zum Mitspielen aus. Benny KI-lian BratscherBen https://events.ccc.de/congress/2025/hub/event/detail/gptdash-der-reverse-turing-test https://cfp.cccv.de/39c3/talk/F3NXNE/ https://cfp.cccv.de/39c3/talk/F3NXNE/feedback/ false 2025-12-28T10:00:00+01:00 10:00 00:45 Ground 39c3-junghackerinnentag-einfuhrung de CCC & Community Talk Zu unserer Freude haben sich in den letzten Jahren immer mehr Junghacker:innen auf dem Congress eingefunden. Daher bieten wir auch diesmal, wie schon in den Vorjahren, einen speziell auf Kinder und Jugendliche zugeschnittenen Junghacker:innentag an. Am zweiten Congresstag, dem 28. Dezember 2024, organisieren Freiwillige aus vielen Assemblies von etwa 10 bis 17 Uhr ein vielseitiges Workshop-Programm für angehende Hacker:innen. Weitere Informationen [findest du hier](https://events.ccc.de/2025/11/25/39c3-junghackerinnentag/). https://events.ccc.de/congress/2025/hub/event/detail/junghackerinnentag-einfuhrung https://cfp.cccv.de/39c3/talk/7UZMPL/ https://cfp.cccv.de/39c3/talk/7UZMPL/feedback/ true 2025-12-28T11:00:00+01:00 11:00 01:00 Ground 39c3-hatupangwingwi-the-story-how-kenyans-fought-back-against-intrusive-digital-identity-systems en Ethics, Society & Politics Talk The session title is fashioned after the Kenyan movement building rhetoric “Hatupangwingwi” which is Kenyan slang meant as a call to action to counter anti-movement building techniques by the political class and resist infiltration and corruption. This is true for the organisation and movement building towards inclusive identity regimes in Kenya. The session seeks to explore the lessons from Kenya’s journey to digitalization of public services and the uptake of Digital Public infrastructure. It digs deeper on the power of us and how civil society could stop a destructive surveillance driven digitalisation thus protecting millions of Kenyans. In 2019, the Kenyan government announced the transition to a centralised database named National integrated Identity management system (Huduma Namba) in a bid to develop a digital Identity system that went on to be termed a “single source of truth. Historically, Kenya has not had the best track record with civil registration and identity systems. This is particularly due to the linkages with colonial practices with the first ID “Kipande” being used as a tool for surveillance of natives and imposed for restriction of movement. This system carried on post independence creating different classes of citizens in terms of access to nationality documents. It is for this reason that CSOs, mostly community-based, chose a three pronged approach to counter this; seeking legal redress, grassroots/community mobilization and advocacy and spotlighting ways in which in a shrinking civil society space, Kenyan civil society was able not only take up space, but make their impact felt in protecting the rights of those on the margins. The session shares lessons of how we shaped the Media narrative that took down a multi million dollar project that was not people centered but rather oppression driven. This session shares experiences of how we created a heightened sense of citizenry awareness to shoot down oppressive digitalisation agendas. The aim is to show how these efforts led to over 10 million Kenyans resisting to enroll in the system especially the young people (Gen Z) who felt they were being coerced to join a system due to the poor messaging by the government and they connected with the NGO campaign thus choosing to resist the system in the true spirit of Hatupangwingwi, with Hashtags like [#DOIDRIGHT](https://events.ccc.de/congress/2025/hub/tag/DOIDRIGHT) and [#DEPORTME](https://events.ccc.de/congress/2025/hub/tag/DEPORTME) trending on social media as a sign of resistance. This led to the collapse of the whole project. Finally, the session will share how in 2022, when the new government wanted to roll out the new DPI project known as Maisha Namba, they realised the importance of including civil society voices and they convened over 50 NGOs to try to build buy-in for the new digital ID program. It was the first time the government and NGOs were on the same table discussing how to build an inclusive digital ID system. This is the story of how the power of us led to civil society earning their space in the designing phase of the new Digital Public Infrastructure. Mustafa Mahmoud Yousif https://events.ccc.de/congress/2025/hub/event/detail/hatupangwingwi-the-story-how-kenyans-fought-back-against-intrusive-digital-identity-systems https://cfp.cccv.de/39c3/talk/SBN89V/ My Presentation https://cfp.cccv.de/39c3/talk/SBN89V/feedback/ false 2025-12-28T12:15:00+01:00 12:15 01:00 Ground 39c3-suing-spyware-in-europe-news-from-the-front en Ethics, Society & Politics Talk In 2022, CitizenLab contacted a member of the Spanish non-profit Irídia to tell them that one of their members had likely been hacked with Pegasus spyware. The target, a lawyer, had been spied on by the Spanish government in 2020 because he represented a Catalan politician who was in prison. His phone was infected with Pegasus during the COVID-19 lockdown, on the same day he was having an online meeting with other lawyers working on the case. Irídia and the lawyer (Andreu) decided to take the case to court. A few years later, he met with Data Rights and invited them to join forces and bring in partners from across Europe to increase the impact. This collaboration led to the creation of the PEGA coalition in May 2025. This talk goes over the status of the case and work we have done across Europe to bring spyware use in court. Despite the European Parliament’s PEGA investigation in 2023, spyware scandals in Europe continue to grow, with little real action to stop or address them. Many EU countries were — or still are — clients of the world’s major spyware companies. As a result, nothing changes except the number of victims targeted by these technologies. Worst, offices or clients in the EU is useful for spyware companies' sales pitch. So, the EU is a growing hub for this ominous ecosystem! With no real political will to act, members of the PEGA investigation say the only hope for change is to take these cases to court — and that’s exactly the path we’ve chosen! Irídia’s case is one of the flagship cases in the EU, both for its depth and for what it has achieved so far. We will review the current status and implications of the case, examining issues that range from state responsibility to the role of the spyware company behind Pegasus — in its creation, sale, and export — which maintains a strong presence within the EU. After that, we will take a step back to look at what is happening across Europe. We will highlight the most significant cases currently moving forward, as well as some of the PEGA coalition’s strategies for driving accountability, strengthening safeguards, and ensuring remedies. The coalition’s mission goes beyond legal action — it aims to prevent the devastating impact of spyware and push for systemic change. Lori Roussey Celia/Irídia https://events.ccc.de/congress/2025/hub/event/detail/suing-spyware-in-europe-news-from-the-front https://cfp.cccv.de/39c3/talk/37HY7V/ https://cfp.cccv.de/39c3/talk/37HY7V/feedback/ false 2025-12-28T13:30:00+01:00 13:30 01:00 Ground 39c3-a-space-odyssey-2-how-to-study-moon-rocks-from-the-soviet-sample-return-mission-luna-24 en Science Talk It is 1976 and the USA long stopped going to the Moon when a Soviet automatic landing station called Luna 24 descends to the Lunar surface. It touches down on 3.3 Billion year old rock formations at a place no mission has ever gone before. What exactly happened remains a mystery to this day, but the space probe managed to take a 2.3 m long drill core from the Lunar regolith, packaged the sample in a genius way and launched it for its voyage to Earth. Some days later the sample entered earths atmosphere and landed in remote Siberia and ended up in our hands more than 50 Years later. We tell the story of the sample, the people that brought it to Earth and how we analyzed it with the newest methods including µm sized high intensity X-ray beams, 30kV electron beams and LN2 cooled infrared spectrometers. In this talk, members of the Museum for Natural History in Berlin will present the story of a Luna 24 sample retrieved by the GDR from the USSR. The sample has been almost "lost" to time. When it fell into our hands, we started understanding its historical and scientific significance, produced specialized sample containers and initiated curation efforts of the sample while slowly understanding its history and geochemical composition. ### Luna 24 Moon Mission What happened on the 18th & 19th of August 1976 on the moon? Why was this landing site chosen and how was the sample retrieved and brought back to Earth? Which way did the scientists handle these extremely precious samples? Picture: Музей Космонавтики (CC0 1.0) ### Methods and Results Which methods can be utilized to gather new information from such a sample without destroying it? Which storage and curation methods must be used to preserve its value for the scientists that come after us? How did advanced analytical methods like µCT, electron microscopes, µ X-ray fluorescence spectrometers and nitrogen-cooled infrared spectrometers contribute to our understanding of the sample? Fly with us to the moon! This work has been developed together with Christopher Hamann. https://cfp.cccv.de/media/39c3/submissions/LWYNKY/-24_3_24432633921_cropped_gGa5GmY_UsXWgq3.webp Paul Koetter https://events.ccc.de/congress/2025/hub/event/detail/a-space-odyssey-2-how-to-study-moon-rocks-from-the-soviet-sample-return-mission-luna-24 https://cfp.cccv.de/39c3/talk/LWYNKY/ https://cfp.cccv.de/39c3/talk/LWYNKY/feedback/ false 2025-12-28T14:45:00+01:00 14:45 00:40 Ground 39c3-chaos-communication-chemistry-dna-security-systems-based-on-molecular-randomness en Science Talk **Over the past few decades, nucleic acids have increasingly been investigated as alternative data storage media and platforms for molecular computing. This talk builds on past research and introduces another branch to the field: DNA cryptography based on random chemistry. This technology provides a platform for conceiving new security architectures that bridge the physical with the digital world.** Nucleic acids have been theorized as potential data storage and computation platforms since the mid-20th century. In the meantime, notable advances have been made in implementing such systems, combining academic research with industry efforts. After providing a general introduction to the interdisciplinary field of DNA information technology, in the second half of the talk focuses on DNA-based cryptography and security systems, in particular zooming in on the example of chemical unclonable functions (CUFs) based on randomly generated, synthetic DNA sequences. Similar to Physical Unclonable Functions (PUFs), these DNA-based systems contain vast random elements that cannot be reconstructed – neither algorithmically nor synthetically. Using biochemical processing, we can operate these systems in a fashion comparable to cryptographic hash functions, enabling new authentication protocols. Aside from covering the basics, we delve into the advantages, as well as the drawbacks, of DNA as a medium. Finally, we explore how CUFs could in the future be implemented as physical security architectures: For example, in anti-counterfeiting of medicines or as personal signatures for artworks. In a broader sense, this talk aims to inspire a reconsideration of entropy, randomness and information in the experimental sciences through a digital lens. In doing so, it provides examples of how looking at physical systems through an information perspective can unravel new synergies, applications and even security architectures. https://cfp.cccv.de/media/39c3/submissions/YVTT8U/Screenshot_2025-10-24_095330_rhJQm3k_iu_XPUaYt4.webp Anne Lüscher https://events.ccc.de/congress/2025/hub/event/detail/chaos-communication-chemistry-dna-security-systems-based-on-molecular-randomness https://cfp.cccv.de/39c3/talk/YVTT8U/ Slides https://cfp.cccv.de/39c3/talk/YVTT8U/feedback/ false 2025-12-28T15:40:00+01:00 15:40 00:40 Ground 39c3-burn-gatekeepers-not-books de Ethics, Society & Politics Talk *Der deutsche Buchmarkt gegen den Rest der Welt oder auch: Enshittification des Buchmarkts und keine API für ein Halleluja* Es gibt unzählige wundervolle Geschichten und das Internet hat über die letzten Jahrzehnte viele großartige Autor*innen hervorgbracht. Doch Verlage haben begrenzte Kapazitäten und sind außerdem zumeist sehr konservativ in ihren Programmen. Die Lösung für beides: Selfpublishing. Neue und gewitzte, genre-übergreifende Bücher an neugierige Lesende zu bringen, könnte so einfach sein; wären da nicht Barsortimente, fehlende APIs und ein insgesamt schreckliches Ökosystem, die Indie-Autor:innen (und alle, die versuchen, auf dem deutschpsprachigen Buchmarkt irgend etwas Innovatives für Indies zu machen) das Leben schwer machen. Der Buchmarkt ist kaputt; das ist keine neue Erkentnis. Wir dröseln auf, an welchen Ecken es hakt und zeigen auf, wie schlimm es wirklich ist. Dabei machen wir auch ein bisschen Name & Shame, denn irgendwer ist ja schuld. Wir zeigen aber auch, wo uns auf dem deutschen Markt noch fehlende APIs (im Gegensatz zum internationalen Buchmarkt) das Leben deutlich leichter machen würden. tomate jinxx https://events.ccc.de/congress/2025/hub/event/detail/burn-gatekeepers-not-books https://cfp.cccv.de/39c3/talk/ATEWP7/ https://cfp.cccv.de/39c3/talk/ATEWP7/feedback/ true 2025-12-28T16:35:00+01:00 16:35 00:40 Ground 39c3-persist-resist-stitch en Art & Beauty Talk What does knitting have to do with espionage? Can embroidery help your mental health? This talk shows how the skills to create textile art have enabled people to resist and to persist under oppressive regimes for centuries. And it offers ways to keep doing so. Working with textile mediums like yarn, thread, and floss is generally seen as a feminine hobby and as thus is usually classified as craft, not art. And crafting is something people, maybe even people usually seen as a bit boring, do in their free time to unwind. Most of us have grown up with the image of the loving grandmother knitting socks for the family, an act of care that was never considered anything special. The patriarchal society’s tendency to underestimate anything considered feminine and, inextricably connected to this, domestic is an ongoing struggle. But being underestimated also provides a cover and with it the opportunity for subversion and resistance. As global powers are cycling back to despotism and opression, let me take you back in time to show you how people used textile crafts to organise resistance and shape movements. Like the quilts that were designed and sewn to help enslaved people in the US escape slavery and navigate the Underground Railroad from the 1780s on, or the knitted garments that carried information about the Nazis to help resistance in occupied Europe during World War II, or the cross stitches by a prisoner of war that had Nazis unknowingly display art saying “Fuck Hitler”. Textile crafts have been used by marginalised and disenfranchised people to protest, to organise, and to persist for centuries. This tradition found a new rise in what is now called “craftivism” and is using the internet to build bigger communities spanning the world. These communities also come together to help, often quite tangibly by creating specific items like the home-sewn masks during early Covid19. In addition, crafting has scientifically-proven benefits for one’s mental health. Taking up the increasingly popular quote "When the world is too scary, too loud, too much: Stop consuming, start creating", this talk shows how the skills to create have enabled and will enable people to resist and to persist. https://cfp.cccv.de/media/39c3/submissions/JEHZPU/philo_stitches_vw3s5fm_E1ZCbt7_UXYOxIU.webp Philo https://events.ccc.de/congress/2025/hub/event/detail/persist-resist-stitch https://cfp.cccv.de/39c3/talk/JEHZPU/ Talk Slides with links, literature etc. https://cfp.cccv.de/39c3/talk/JEHZPU/feedback/ false 2025-12-28T17:35:00+01:00 17:35 00:40 Ground 39c3-current-drone-wars en Ethics, Society & Politics Talk The character of drone wars has changed. The large, cumbersome long-range drones have been complemented with small and low-budget drones. Moreover, more and more states are developing, deploying and selling them. Ten years ago at least 50 states were developing them. At the top are USA, Israel, Turkey, China, Iran and Russia. Russia's attack on Ukraine has unleashed a drone war unlike any seen before. In short time the Ukraine has build significant drone production capabilities and announcement that it will increase its own production of quadcopters and kamikaze drones to one million units per year. German defense companies and startups are now promoting a “drone wall on NATO's eastern flank.” Moreover, despite their vulnerability to air defenses, large drones are also being further developed. They are intended to accompany next generation fighter jets in swarms. In this talk, past and current developments are discussed. What are the perspectives now? The character of drone wars has changed. The large, cumbersome long-range drones have been complemented with small and low-budget drones. Moreover, more and more states are developing, deploying and selling them. Ten years ago at least 50 states were developing them. At the top are USA, Israel, Turkey, China, Iran and Russia. Russia's attack on Ukraine has unleashed a drone war unlike any seen before. In short time the Ukraine has build significant drone production capabilities and announcement that it will increase its own production of quadcopters and kamikaze drones to one million units per year. German defense companies and startups are now promoting a “drone wall on NATO's eastern flank.” Moreover, despite their vulnerability to air defenses, large drones are also being further developed. They are intended to accompany next generation fighter jets in swarms. In this talk, past and current developments are discussed. What are the perspectives now? Leonard https://events.ccc.de/congress/2025/hub/event/detail/current-drone-wars https://cfp.cccv.de/39c3/talk/YXGADP/ https://cfp.cccv.de/39c3/talk/YXGADP/feedback/ false 2025-12-28T19:15:00+01:00 19:15 00:40 Ground 39c3-cpu-entwicklung-in-factorio-vom-d-flip-flop-bis-zum-eigenen-betriebssystem de Hardware Talk Factorio ist ein Fabriksimulationsspiel mit integriertem Logiksystem. Dies ermöglichte mir den Bau einer CPU, die unter anderem aus einer 5-stufiger Pipeline, einer Forwarding Logikeinheit, Interrupt Handling sowie einem I/O Interface besteht. Über einen selbst geschriebenen Assembler konnte ich ein eigenes Betriebssystem und Programme wie Minesweeper oder Snake integrieren. Der Talk soll euch zeigen, wie sich klassische Computerarchitektur in einem völlig anderen technischen Kontext umsetzen lässt und wo dabei überraschend echte Probleme der CPU-Entwicklung auftreten. Kommt mit auf die Reise: Vom Blick auf den gesamten Computer bis hinunter zu den einzelnen Logikgattern ist es nur eine Mausradbewegung entfernt! Factorio ist ein Spiel über Fabrikautomation - Förderbänder, Dampfmaschinen und Produktionsketten stehen im Vordergrund. Eigentlich ist das interne Logiksystem („Combinators“) gedacht für die Steuerung der Fabrik, jedoch erlaubt es auch die Entwicklung komplexer Hardware. In diesem Vortrag erzähle ich meine Geschichte, wie ich eine vollständige RISC-V-Architektur in Factorio rein aus Vanilla-Combinators erschaffen habe: Die CPU arbeitet mit 32 Bit-Wörtern, verfügt über 32 General Purpose Register, 128 KB RAM/Persistent Storage, eine 5-stufige Pipeline mit Forwarding und Hazard-Handling sowie eine Logikeinheit für Branches und Interrupts. Ein Display-Controller steuert eine Konsolen-Ausgabe sowie ein Farbdisplay, während ein Keyboard-Controller Eingaben über physische In-Game-Tasten ermöglicht. Ergänzt wird die Hardware auf der Softwareseite durch das Betriebssystem *FactOS*, das ein einfaches Filesystem sowie Systemcalls (zum Beispiel zum Drucken eines Strings im Terminal) zur Verfügung stellt. Außerdem schränkt das Betriebssystem das ausführende User-Programm auf einen festen Bereich des RAMs ein und verhindert so direkten Zugriff auf die Hardware. Im Talk möchte ich euch durch alle Schichten dieser Konstruktion führen: Von den Grundlagen der Factorio-Signalphysik über CPU-Design und Pipeline-Hazards bis zur Toolchain und dem Betriebssystem. Außerdem gebe ich einen Einblick, wie die Limitierungen aber auch die Vorteile von Factorio im Vergleich zu herkömmlichen Logik Simulatoren das Design einer CPU beeinflussen können. Ich runde meinen Talk mit einer Live-Demonstration des Systems ab. Die vollständige CPU, inklusive Quellcode des Assemblers, Blueprints und Beispielprogramme, stelle ich öffentlich zur Verfügung. Dadurch kann jede interessierte Person die Architektur in Factorio laden, erweitern und eigene Software dafür entwickeln. Es wird im Anschluss eine [Self-organized Session](https://events.ccc.de/congress/2025/hub/en/event/detail/cpu-entwicklung-in-factorio-wie-benutze-ich-phds-f) geben, in der ich eine hands-on Einleitung geben werde, wie man die CPU in Factorio lädt, wie man Programme schreibt, diese assembliert und in Factorio einfügt. Auch kann man dort gerne mit mir über das Projekt quatschen, ich freue mich auf alle Beiträge und Kommentare :) https://cfp.cccv.de/media/39c3/submissions/U9UGN3/intro_39c3_qwnzvh5_TkZaK4T_s5UzAmG.webp PhD (Philipp) https://events.ccc.de/congress/2025/hub/event/detail/cpu-entwicklung-in-factorio-vom-d-flip-flop-bis-zum-eigenen-betriebssystem https://cfp.cccv.de/39c3/talk/U9UGN3/ Folien (PDF export) https://cfp.cccv.de/39c3/talk/U9UGN3/feedback/ false 2025-12-28T20:10:00+01:00 20:10 00:40 Ground 39c3-recharge-your-batteries-with-us-an-empowering-journey-through-the-energy-transition en Science Talk Amidst gloomy headlines, extreme weather, and climate anxiety, the good stories often get lost. Yet they exist - inspiring people, clever engineering, real breakthroughs. And that's exactly what we bring you – the positive power cycles of the energy transition in action. And real energy on stage. A committed energy activist and an award-winning solar cell researcher take you on a lively, motivating and sometimes funny journey: - to electricity rebels from the Black Forest, - to heat pumps that supply entire neighborhoods, - to new solar technologies, - to wind turbines with history, - and to politicians who were too pessimistic. What is already going really well? What can you emulate? Where is it worth getting involved? We'll show you – in an easy-to-understand, cheerful way. To stay motivated for an adventure as big as the energy transition, we need more than just facts and figures. We need momentum, optimism, and the human energy that keep the power cycles turning. Come by! Let’s recharge together and celebrate the successes of the energy transition. Salacidre JulianeB https://events.ccc.de/congress/2025/hub/event/detail/recharge-your-batteries-with-us-an-empowering-journey-through-the-energy-transition https://cfp.cccv.de/39c3/talk/VN77T8/ https://cfp.cccv.de/39c3/talk/VN77T8/feedback/ false 2025-12-28T21:05:00+01:00 21:05 00:40 Ground 39c3-css-clicker-training-making-games-in-a-styling-language en Art & Beauty Talk CSS is a programming language, and you can make games in it. Let's install NoScript and make some together! This talk is about how HTML and CSS can be used to make interactive art and games, without using any JS or server-side code. I'll explain some of the classic Cohost CSS Crimes, how I made [CSS Clicker](https://lyra.horse/css-clicker/), and what's next for the CSS scene. I hope this talk will teach and/or inspire you to make cool stuff of your own! --- *Content notes:* - Slides feature animations and visual effects - Short video clip (with music) will be played - Clicker sound at the end of the talk --- Slides will be available after the talk at: [https://lyra.horse/slides/#2025-congress](https://lyra.horse/slides/#2025-congress) https://cfp.cccv.de/media/39c3/submissions/J7MRSC/chrome_2025-12-22_22-08-20_MgSki62_1CNEwE0.webp Lyra Rebane https://events.ccc.de/congress/2025/hub/event/detail/css-clicker-training-making-games-in-a-styling-language https://cfp.cccv.de/39c3/talk/J7MRSC/ https://cfp.cccv.de/39c3/talk/J7MRSC/feedback/ false 2025-12-28T22:05:00+01:00 22:05 00:40 Ground 39c3-textiles-101-fast-fiber-transform en Hardware Talk Textiles are everywhere, yet few of us know how they’re made. This talk aims to give you an overview over the complete transformation from fiber to finished textile. We'll be exploring fiber properties, spinning, and techniques like weaving, knitting, crochet, braiding, and knotting, followed by finishing methods such as dyeing, printing, and embroidery. You’ll learn why not only fiber but also structure matters, and how to make or hack textiles on your own without relying on fast fashion or industrial tools. Textiles play an integral part in our daily lives. If you’re reading this, chances are you’re wearing clothes or have some form of fabric within arm’s reach. Yet despite how common and essential textiles are, few of us know how they actually come to be. How do we go from a plant, animal, or synthetic polymer to a fully finished piece of clothing? This talk unravels the full transformation pipeline of textiles: starting with fibers and their properties, then spinning them into yarn, turning that yarn into textiles through weaving, knitting, crochet, braiding, knotting, and other techniques, and finally finishing them through printing, embroidery, dyeing, or bleaching. Along the way, you’ll learn why your “100% cotton” garments can feel completely different despite being made of the same fiber, how structure matters just as much as material, and what environmental impact different choices have. Whether you want to make your own textiles, hack existing ones, or finally understand why that wool sweater you washed too hot is now tiny, this talk is a crash course in most things textile, and a reminder that you don’t need industrial machinery or fast fashion to create something on your own. octoprog https://events.ccc.de/congress/2025/hub/event/detail/textiles-101-fast-fiber-transform https://cfp.cccv.de/39c3/talk/E8XTX7/ https://cfp.cccv.de/39c3/talk/E8XTX7/feedback/ false 2025-12-28T23:00:00+01:00 23:00 00:40 Ground 39c3-51-ways-to-spell-the-image-giraffe-the-hidden-politics-of-token-languages-in-generative-ai en Art & Beauty Talk Generative AI models don't operate on human languages – they speak in **tokens**. Tokens are computational fragments that deconstruct language into subword units, stored in large dictionaries. These tokens encode not only language but also political ideologies, corporate interests, and cultural biases even before model training begins. Social media handles like *realdonaldtrump*, brand names like *louisvuitton*, or even *!!!!!!!!!!!!!!!!* exist as single tokens, while other words remain fragmented. Through various artistic and adversarial experiments, we demonstrate that tokenization is a political act that determines what can be represented and how images become computable through language. Tokens are the fragments of words that generative models use to process language, the step that breaks text into subword units before any neural networks are involved. There are 51 ways to combine tokens to spell the word giraffe using existing vocabulary: from a single token **giraffe** to splits using multiple tokens like *gi|ra|ffe*, *gira|f|fe*, or even *g|i|r|af|fe*. In one experiment, we hijacked the prompting process and fed token combinations directly to text-to-image models. With variations like *g|iraffe* or *gir|affe* still generating recognizable results, our experiments show that the beginning and end of tokens hold particular semantic weight in forming giraffe-like images. This reveals that certain images cannot be generated through prompting alone, as the tokenization process sanitizes most combinations, suggesting that English, or any human language, is merely a subset of token languages. The talk features experiments using genetic algorithms to reverse-engineer prompts from images, respelling words in token language to change their generative outcomes, and critically examining token dictionaries to investigate edge cases where the vocabulary breaks down entirely, producing somewhat *speculative languages* that include strange words formed at the edge of chaos where English meets token (non-)sense. These experiments show that even before generation occurs, token dictionaries already encode a stochastic worldview, shaped by the statistical frequencies of their training data – dominated by popular culture, brands, platform-speak, and *non-words*. Tokenization is, therefore, a political act: it defines what can be represented and how the world becomes computationally representable. We will look at specific tokens and ask: Which models use which vocabularies? What *non-word* tokens are shared among models? And how do language models make sense of a world using a language we do not understand? https://cfp.cccv.de/media/39c3/submissions/L7BUAN/photo_2025-12-11_17.12.19_3heeRc5_OONFq_2AyKTv5.webp Ting-Chun Liu Leon-Etienne Kühr https://events.ccc.de/congress/2025/hub/event/detail/51-ways-to-spell-the-image-giraffe-the-hidden-politics-of-token-languages-in-generative-ai https://cfp.cccv.de/39c3/talk/L7BUAN/ https://cfp.cccv.de/39c3/talk/L7BUAN/feedback/ false 2025-12-28T23:55:00+01:00 23:55 00:40 Ground 39c3-reverse-engineering-the-pixel-titanm2-firmware en Hardware Talk The TitanM2 chip has been central to the security of the google pixel series since the Pixel 6. It is based on a modified RISC-V design with a bignum accelerator. Google added some non standard instructions to the RISC-V ISA. This talk investigates the reverse engineering using Ghidra, and simulation of the firmware in python. I will discuss the problems encountered while reverse engineering and simulating the firmware for the TitanM2 security chip, found in the Google Pixel phones. I'll discuss how to obtain the firmware. Talk about the problems reverse engineering this particular binary. I show how you can easily extend ghidra with new instructions to get a full decompilation. Also, I wrote a Risc-V simulator in python for running the titanM2 firmware. willem https://events.ccc.de/congress/2025/hub/event/detail/reverse-engineering-the-pixel-titanm2-firmware https://cfp.cccv.de/39c3/talk/ZH8KQV/ slides https://cfp.cccv.de/39c3/talk/ZH8KQV/feedback/ false 2025-12-28T11:00:00+01:00 11:00 02:00 Zero 39c3-lightning-talks-tag-2 de CCC & Community Talk Lightning Talks - Tag 2 - **Lightning Talks Introduction** - **Chaos auf der Schiene: Die Wahrheit hinter den Verspätungen** — *poschi* - **EventFahrplan - The 39C3 Fahrplan App for Android** — *tbsprs* - **Quantum computing myths and reality** — *Moonlit* - **Return to attacker.com** — *Safi* - **Teilchendetektor im Keller? Ich habs gemacht. Die Theorie und der Bau einer Funkenkammer** — *Rosa* - **What's the most secure phone?** — *jiska* - **reverse engineering a cinema camera’s peripheral port** — *3nt3* - **Youth Hacking 4 Freedom: the European Free Software competition for teenagers** — *Ana Galan* - **From word clouds to Word Rain: A new text visualisation technique** — *Maria Skeppstedt* - **Spaß mit Brettspielen** — *Marco Bakera* - **Creative Commons Radio - I really didn't want to become a copyright activist!** — *Martin* - **lernOS für Dich - Selbstmanagement & persönliches Wissensmanagement leicht gemacht** — *Simon Dückert* - **Was man in Bluetooth Advertisements so alles findet** — *Paul* - **The Sorbus Computer** — *SvOlli* - **AI doesn’t have to slop - Introducing an open source alternative to big-tech AI agents** — *Kitty* - **Interoperability and the Digital Markets Act: collecting experiences from the community** — *Dario Presutti* - **Leveraging Security Twin for on-demand resilience assessment against high-impact attacks** — *Manuel Poisson* - **A seatbelt for innerHTML** — *Frederik Braun* - **Toxicframe - Ghost in the Switch: Vier Jahre Schweigen in der Netgate SG-2100** — *Wim Bonis* - **KI³Rat = Mensch x Daten x Dialog** — *ceryo / Jo Tiffe* - **iPod Nano Reverse Engineering** — *hug0* - **Interfaces For Society - Wenn Demokratie Auf Protokollen Läuft** — *Pauline Dimmek* - **Security problems with electronic invoices** — *Hanno Böck* Bonnie keldo Andi Bräu https://events.ccc.de/congress/2025/hub/event/detail/lightning-talks-tag-2 https://cfp.cccv.de/39c3/talk/YB8VWS/ https://cfp.cccv.de/39c3/talk/YB8VWS/feedback/ false 2025-12-28T13:30:00+01:00 13:30 01:00 Zero 39c3-agentic-probllms-exploiting-ai-computer-use-and-coding-agents en Security Talk This talk demonstrates end-to-end prompt injection exploits that compromise agentic systems. Specifically, we will discuss exploits that target computer-use and coding agents, such as Anthropic's Claude Code, GitHub Copilot, Google Jules, Devin AI, ChatGPT Operator, Amazon Q, AWS Kiro, and others. Exploits will impact confidentiality, system integrity, and the future of AI-driven automation, including remote code execution, exfiltration of sensitive information such as access tokens, and even joining Agents to traditional command and control infrastructure. Which are known as "ZombAIs", a term first coined by the presenter as well as long-term prompt injection persistence in AI coding agents. Additionally, we will explore how nation state TTPs such as ClickFix apply to Computer-Use systems and how they can trick AI systems and lead to full system compromise (AI ClickFix). Finally, we will cover current mitigation strategies and forward-looking recommendations and strategic thoughts. During the Month of AI Bugs (August 2025), I responsibly disclosed over two dozen security vulnerabilities across all major agentic AI coding assistants. This talk distills the most severe findings and patterns observed. Key highlights include: * Critical prompt-injection exploits enabling zero-click data exfiltration and arbitrary remote code execution across multiple platforms and vendor products * Recurring systemic flaws such as over-reliance on LLM behavior for trust decisions, inadequate sandboxing of tools, and weak user-in-the-loop controls. * How I leveraged AI to find some of these vulnerabilities quickly * The AI Kill Chain: prompt injection, confused deputy behavior, and automatic tool invocation * Adaptation of nation-state TTPs (e.g., ClickFix) into AI ClickFix techniques that can fully compromise computer-use systems. * Insights about vendor responses: from quick patches and CVEs to months of silence, or quiet patching * AgentHopper will highlight how these vulnerabilities combined could have led to an AI Virus Finally, the session presents practical mitigations and forward-looking strategies to reduce the growing attack surface of probabilistic, autonomous AI systems. Johann Rehberger https://events.ccc.de/congress/2025/hub/event/detail/agentic-probllms-exploiting-ai-computer-use-and-coding-agents https://cfp.cccv.de/39c3/talk/3AFPCB/ Agentic ProbLLMs - Exploit AI Computer-Use and Coding Agents (PDF Export) https://cfp.cccv.de/39c3/talk/3AFPCB/feedback/ false 2025-12-28T14:45:00+01:00 14:45 00:40 Zero 39c3-live-die-repeat-the-fight-against-data-retention-and-boundless-access-to-data en Ethics, Society & Politics Talk Both within the EU as well as nationally in Germany, there exists a renewed drive to implement data retention, a practice struck down by the ECJ and discontinued in many national legislations. In parallel, cross-border access to stored data has been mandated within the EU as “e-evidence”, and will soon be extended to 90+ countries under the umbrella of the EU cybercrime convention. In principle, all data stored by service providers will be available to law enforcement as part of a criminal investigation. The timing of both initiatives is not coincidental, as access to data naturally relies on the availability of data. The talk will address the state of play on data retention in various legislations, and introduce the practice of cross border access to stored data by law enforcement as well as its shortcomings and threats to privacy and confidentiality. The Specter of Data Retention is back in the political arena, both as a harmonized, EU-wide approach as well as being part of the coalition agreement of the new German national government. Other countries have already recently implemented new data retention laws, i.e. Belgium or Denmark. In parallel, access to all types of stored data – and not only data stored under a data retention regime – by law enforcement has been radically reformed by groundbreaking new legislation, undermining both exiting national safeguards as well as protections implemented by businesses aiming for a higher standard in cyber security and data protection. The talk will give an overview on recent developments for a harmonized “minimum” approach to data retention under the Polish and Danish EU presidency as well as the new German legislation currently under consideration. It will introduce the upcoming international release mechanisms for stored data under the e-evidence legislation, the 2nd protocol to the EU cybercrime convention as well as future threats from the UN cybercrime convention. It will address how a cross-border request for information works in practice, which types of data can be requested by whom, and who will be responsible for the few remaining safeguards – including an analysis of the threat model and potential “side channel” attacks by cybercrime to gain access to basically all data stored by and with service providers. Klaus Landefeld https://events.ccc.de/congress/2025/hub/event/detail/live-die-repeat-the-fight-against-data-retention-and-boundless-access-to-data https://cfp.cccv.de/39c3/talk/DXEGJL/ Slides from live Presentation https://cfp.cccv.de/39c3/talk/DXEGJL/feedback/ false 2025-12-28T15:40:00+01:00 15:40 00:40 Zero 39c3-amateurfunk-im-all-kontakt-mit-fram2 de Hardware Talk Wir geben Einblicke in zwei intensive Wochen Planung, Koordination und Aufbau, den Betrieb einer (improvisierten) Bodenstation, sprechen über technische Hürden, Antennendesign und Organisation – und wie wir schließlich mit Astronautin Rabea Rogge im Weltraum gefunkt haben. Schon kurz nachdem die ersten Satelliten den Weltraum eroberten, waren auch Amateurfunkende dabei und brachten ihr Hobby in dieses Feld ein. Auch bei Fram2, der ersten bemannten Mission, die beide Polarregionen überflog, war der Sprechfunkkontakt mit einer Universität fest eingeplant. Der studentische Funkclub "AFuTUB" (https://dk0tu.de) an der TU Berlin hat die Crew der Fram2 angefunkt – mit einem experimentellen Funksetup, das für viele von uns Neuland war. Wir geben Einblicke in zwei intensive Wochen Planung, Koordination und Aufbau, den Betrieb einer (improvisierten) Bodenstation, sprechen über technische Hürden, Antennendesign und Organisation – und wie wir schließlich mit der Astronautin Rabea Rogge im Weltraum gefunkt haben. https://cfp.cccv.de/media/39c3/submissions/GQESGN/20250331_201341_Gruppenbild_Vorbereitun_IC68SV7.webp akira25 flx Gato https://events.ccc.de/congress/2025/hub/event/detail/amateurfunk-im-all-kontakt-mit-fram2 https://cfp.cccv.de/39c3/talk/GQESGN/ Finale Folien (CC-Lizenz) https://cfp.cccv.de/39c3/talk/GQESGN/feedback/ false 2025-12-28T16:35:00+01:00 16:35 00:40 Zero 39c3-lessons-from-building-an-open-architecture-secure-element en Hardware Talk The talk will be about our experience from building an open-architecture secure element from the ground up. It explains why openness became part of the security model, how it reshaped design and development workflows, and where reality pushed back — through legal constraints, third-party IP, or export controls. It walks through the secure boot chain, attestation model, firmware update flow, integration APIs, and the testing framework built for external inspection. Real examples of security evaluations by independent researchers are presented, showing what was learned from their findings and how those exchanges raised the overall security bar. The goal is to provoke discussion on how open collaboration can make hardware more verifiable, adaptable, auditable and while keeping secure. This talk shares our engineering experience from designing and implementing an open-architecture secure element — a type of chip that is traditionally closed and opaque. We’ll outline the practical consequences of choosing openness as part of the security model: how it affected hardware architecture, firmware design, verification, and development workflows. The session dives into concrete technical areas including the secure boot chain, attestation and update flow, key storage isolation, and the testing and fuzzing infrastructure used to validate the design. It also covers the boundaries of openness — where third-party IP, export control, or certification requirements force certain blocks to remain closed — and how we document and mitigate those limits. We’ll present anonymized examples of external security evaluations, show how responsible disclosure and transparent fixes improved resilience, and reflect on what “community-driven security” means in a hardware context. Attendees should leave with a clearer view of what it takes to make security verifiable at the silicon level — and why that process is never finished. Jan Pleskac https://events.ccc.de/congress/2025/hub/event/detail/lessons-from-building-an-open-architecture-secure-element https://cfp.cccv.de/39c3/talk/9DYZXG/ Presentation https://cfp.cccv.de/39c3/talk/9DYZXG/feedback/ false 2025-12-28T17:35:00+01:00 17:35 00:40 Zero 39c3-variable-fonts-it-was-never-about-file-size en Art & Beauty Talk A brief history of typographic misbehavior or intended and unintended uses of variable fonts. Nine years after the introduction of variable fonts, their most exciting uses have little to do with what variable fonts originally were intended for and their original promise of smaller file sizes. The talk looks at how designers turned a pragmatic font format into a field for experimentation — from animated typography and uniwidth button text to pattern fonts and typographic side effects with unintended aesthetics. Using examples from projects such as TypoLabs, Marjoree, Kario (the variable font that’s used as part of the 39C3 visual identity), and Bronco, we’ll explore how variable fonts evolved from efficiency tools into creative systems — and why the most interesting ideas often emerge when technology is used in unintended ways. When the OpenType 1.8 specification introduced variable fonts in 2016, the idea was simple: combine all weights and styles of a font family into one file and save file size and therefore bandwidth. Yet in 2025, variable fonts have become a platform for artistic and technical exploration far beyond their initial goal. This talk follows that transformation from the inside. It starts with a short history of flexible font technologies — Adobe’s Multiple Master and Apple’s TrueType GX formats of the 1990s (I am just mentioning the company names as they were the publishers of these technologies) — and how they failed to become standards. It then shows why variable fonts succeeded: many designers today are more tech savvy and know some basic HTML, CSS and maybe even some JavaScript. And at the same time all major browsers and almost all design apps support variable fonts by now. From there, I present a series of first-hand projects where typography met code: – TypoLabs (2017), whose identity used a custom variable font animating between extremes of weight and width → the variable font family became the (probably forever) unpublished variable font family Denman; – Marjoree (2024), a pair of variable pattern fonts based on hexagonal and pentagonal tilings that explore legibility and repetition; – Kario (2025), a duplex variable font powering the 39C3 identity, with uniwidth weights, optical-size adjustments, and typographic Easter eggs; – and Bronco (2017?), an experiment using the arbitrary-axis model for interpolation to escape the cube-shaped multiple master design space of traditional variable fonts. The talk then moves from history to speculation. Early head-tracking experiments once tried to adjust a variable font’s optical size based on reader position — producing total chaos as text reshaped itself while being read. On the other hand this playful chaos marks the moment when things become truly interesting: connecting a font axis to live data, to mouse movement, to sound, to network input — anything that makes type responsive and alive. That’s the kind of misbehavior I want to talk about — not breaking for the sake of breaking, but using technology the “wrong” way to see what happens. The talk will mix images, a lot of short videos, and a bit of behind-the-scenes insight into font development. It’s about what happens when design tools meet code, and how that intersection keeps typography alive and unpredictable. Link list of variable font experiments: https://kario.showmefonts.com/ https://marjoree.showmefonts.com/ https://www.bronco.varfont.com/ https://www.denman.varfont.com/ https://www.seraphs.varfont.com/ + 39C3 visual identity Bernd https://events.ccc.de/congress/2025/hub/event/detail/variable-fonts-it-was-never-about-file-size https://cfp.cccv.de/39c3/talk/MLZFLU/ The slides from the talk without the animations https://cfp.cccv.de/39c3/talk/MLZFLU/feedback/ false 2025-12-28T19:15:00+01:00 19:15 00:40 Zero 39c3-amtsgeheimnis-raus-datenhalde-rein-was-die-informationsfreiheit-in-osterreich-bringt de Ethics, Society & Politics Talk Jahrelang war die staatliche Intransparenz in Österreich nur eine Punchline in den Congress-Talks von Frag Den Staat. Damit könnte jetzt Schluss sein: seit heuer haben Bürger:innen endlich ein Recht, Dokumente einzusehen und ein Informationsfreiheitsgesetz. Wir zeigen, was Deutschland aus der über ein Jahrzehnt andauernden Kampagne für die Abschaffung des Amtsgeheimnisses lernen kann, wofür uns die Nachbarländer beneiden werden und wofür sich Bayern besonders schämen sollte. Die Kampagne – wie aus "binnen zwei Wochen" mehr als elf Jahre wurden Die Strategien – die man übernehmen kann Der Vergleich – wie ist Österreichische IFG im Vergleich zum Deutschen, und ist das der richtige Die (besten) Preisträger – aus mehr als zehn Jahren des Schmähpreises "Mauer des Schweigens" Die Datenhalde – mit Aufruf, was aus dem Datenberg zu machen Markus (fin) Hametner Erwin Ernst "eest9" Steinhammer https://events.ccc.de/congress/2025/hub/event/detail/amtsgeheimnis-raus-datenhalde-rein-was-die-informationsfreiheit-in-osterreich-bringt https://cfp.cccv.de/39c3/talk/XN3U8L/ Slides https://cfp.cccv.de/39c3/talk/XN3U8L/feedback/ false 2025-12-28T20:10:00+01:00 20:10 00:40 Zero 39c3-prometheus-reverse-engineering-overwatch en Hardware Talk This talk explores the internals of Overwatch which make the game work under the hood. The end goal is to democratise development of Overwatch. Being able to host your own servers and modify the game client to your liking should not be up for discussion for a game many people have paid money for. Hey you! Yes you! Do you want to pay for a game which gets forcibly taken away from you after only six years? Do you want to buy lootboxes in order to unlock cosmetics faster in the game you „own“? Overwatch 1 was released in 2016 to critical acclaim and millions of sales globally. It has permanently changed the hero-shooter landscape which was in much need of a fresh new game and playstyle. After a few hard years plagued with infrequent updates, long overdue hero nerfs / reworks and broken promises, Overwatch 1 was finally taken offline on October 3, 2022. Ever since I started playing Overwatch I was fascinated by the game and it’s proprietary engine, Tank. Not much is known about it, only that core components were reused from the cancelled Blizzard IP, Titan. It’s a shame that this game (engine) is not getting the recognition it deserves. From the entity-component architecture to the deterministic graph based scripting engine which handles (almost) everything which happens ingame, it is a truly refreshing take on networking and game programming rarely seen in games. So, considering this, building a game server from scratch can’t be that hard, riiiight? Join me in this documentation of my gradual descent into madness while I (jokingly) roast Overwatch developers for code which they probably do not even remember that theyve written 10+ years ago :) All research presented in this talk was done on the first archived, still publicly available version which I could find, 0.8.0.0 Beta (0.8.24919), which got uploaded to archive.org. https://cfp.cccv.de/media/39c3/submissions/SRRFPA/Screenshot_2025-11-30_164521_vP9NSli_gd_i6hMWJf.webp breakingbread https://events.ccc.de/congress/2025/hub/event/detail/prometheus-reverse-engineering-overwatch https://cfp.cccv.de/39c3/talk/SRRFPA/ Presentation https://cfp.cccv.de/39c3/talk/SRRFPA/feedback/ false 2025-12-28T21:05:00+01:00 21:05 00:40 Zero 39c3-wie-wir-alte-flipperautomaten-am-leben-erhalten de Hardware Talk Der Vortrag beschreibt, wie eine Gruppe von Begeisterten eine Sammlung von ca. 100 Flipperautomaten (Pinball Machines) am Leben und in spielbereitem Zustand erhält. Der Vortrag gibt einen Einblick in die verschiedenen Generationen von Flippern und deren Technik. Angefangen von elektromechanischen Geräten aus den frühen Sechzigern, über erste Prozessorsteuerungen, bis hin zu modernsten computergesteuerten Automaten mit Bussystemen. Jede Generation hat ihre technischen Eigenheiten, ihre typischen Fehlermuster und Schwachstellen. In öffentlichen Räumen sind heutzutage kaum mehr Flipper anzutreffen. Das liegt insbesondere daran, dass deren Wartung aufwändig ist, weil durch die mechanische Beanspruchung häufig Fehler auftreten. Bereits kleinste technische Probleme können den Spielspaß zunichte machen. Das Finden und Beheben von Fehlern erfordert viel Erfahrung – und manchmal Kreativität, insbesondere wenn alte Bauteile nicht mehr verfügbar sind oder kaum Dokumentation vorhanden ist. Technisch ist Sachverstand auf vielen Ebenen erforderlich, vom Schaltplanlesen über Löten und elektronische Messtechnik, bis hin zu mechanischem Know-how. Die Community der Flipper-Enthusiasten ist allerdings groß und kooperativ, sodass auch private Sammler ihre Flipper am Laufen halten können. Axel Böttcher https://events.ccc.de/congress/2025/hub/event/detail/wie-wir-alte-flipperautomaten-am-leben-erhalten https://cfp.cccv.de/39c3/talk/9M7DLC/ https://cfp.cccv.de/39c3/talk/9M7DLC/feedback/ false 2025-12-28T22:05:00+01:00 22:05 00:40 Zero 39c3-how-to-minimize-bugs-in-cryptography-code en Security Talk "Don't roll your own crypto" is an often-repeated aphorism. It's good advice -- but then how does any cryptography get made? Writers of cryptography code like myself write code with bugs just like anyone else, so how do we take precautions against our own mistakes? In this talk, I will give a peek into the cryptographer's toolbox of advanced techniques to avoid bugs: targeted testing, model checking, mathematical proof assistants, information-flow analysis, and more. None of these techniques is a magic silver bullet, but they can help find flaws in reasoning about tricky corner cases in low-level code or prove that higher-level designs are sound, given a defined set of assumptions. We'll go over some examples and try to give a high-level feel for different workflows that create "high-assurance" code. Whether you know it or not, you use this type of cryptography code every day: in your browser, your messaging apps, and your favorite programming language standard libraries. Over the last 10 years or so, using mathematical proof assistants and other formal-logic tools for cryptography code has gone from a relatively new idea to standard practice. I've been lucky enough to have a front-row seat to that transformation, having started doing formal-methods research in 2015 and then switched to a focus on cryptography implementation since 2021. Code from my master's thesis project, ["fiat-crypto"](https://github.com/mit-plv/fiat-crypto), is [included](https://andres.systems/fiat-crypto-adoption.html) in every major browser as well as AWS, Cloudflare, Linux, OpenBSD, and standard crypto libraries for Go, Zig, and Rust (RustCrypto, dalek). In addition to verifying code correctness, designers of high-level protocols like Signal's recently announced post-quantum ratchet increasingly use mathematical tools (ProVerif in Signal's case) to check their work. Despite the growing popularity of these formal techniques and their relevance to personal information security, few people are aware of them, and they maintain a reputation for being hard to learn and esoteric. I'd like to demystify the topic and show examples of how anyone can use proof assistants in small, standalone ways as part of the coding or design process. My hope is that next time a colleague asks for review of a complex high-speed bit-twiddling algorithm, instead of staring at the code line-by-line, attendees of my talk will know they can write a computer-checked proof to confirm or deny that the algorithm achieves its intended result. Jade https://events.ccc.de/congress/2025/hub/event/detail/how-to-minimize-bugs-in-cryptography-code https://cfp.cccv.de/39c3/talk/KJH3UQ/ slides https://cfp.cccv.de/39c3/talk/KJH3UQ/feedback/ false 2025-12-28T23:00:00+01:00 23:00 00:40 Zero 39c3-when-vibe-scammers-met-vibe-hackers-pwning-phaas-with-their-own-weapons en Security Talk What happens when AI-powered criminals meet AI-powered hunters? A technical arms race where both sides are vibing their way through exploitation—and the backdoors write themselves. In October 2025, we investigated Taiwan's fake delivery scam ecosystem targeting convenience store customers. What started as social engineering on social media became a deep dive into two distinct fraud platforms—both bearing the unmistakable fingerprints of AI-generated code. Their developers left more than just bugs: authentication flaws, file management oversights, and database implementations that screamed "I asked LLM and deployed without reading." We turned their sloppiness into weaponized OSINT. Through strategic reconnaissance, careful database analysis, and meticulous operational security, we achieved complete system access on multiple fraud infrastructures. By analyzing server artifacts and certificate patterns, we mapped 100+ active domains and extracted evidence linking thousands of victim transactions worth millions of euros in fraud. But here's the twist: we used the same AI tools they did, just with better prompts. The takeaway isn't just about hunting scammers—it's about the collapse of the skill gap in both offense and defense. When vibe coding meets vibe hacking, the underground economy democratizes in ways we never anticipated. We'll share our methodology for fingerprinting AI-assisted crime infrastructure, discuss the ethical boundaries of counter-operations, and demonstrate how to build sustainable threat intelligence pipelines when your adversary can redeploy in 5 minutes. This talk proves that in 2025, the real exploit isn't zero-day—it's zero-understanding. Our journey began with a simple question: why are so many people losing money to fake convenience store delivery websites? The answer led us through two distinct criminal architectures, both exhibiting characteristics of large language model–assisted development. Case 1 ran on PHP with backup artifacts exposing implementation details and query manipulation opportunities. The installation package itself contained pre-existing access mechanisms—whether this was developer insurance or criminal-on-criminal sabotage remains unclear. We leveraged initial access to bypass security restrictions using protocol-level manipulation and extracted gigabytes of operational data. Case 2 featured authentication bypass vulnerabilities that granted direct administrative access. The backend structure revealed copy-pasted code patterns without proper security implementation. Throughout both systems, we observed telltale signs of AI-generated code: verbose documentation in unexpected languages, inconsistent coding patterns, textbook-like naming conventions, and theoretical security implementations. Even the UI revealed LLM fingerprints—overly polished component layouts, placeholder text patterns, and design choices that felt distinctly "tutorial-like." These weren't experienced developers—they were operators deploying what LLMs gave them without understanding the internals. The irony? We used AI extensively too: for data parsing, pattern recognition, attack surface mapping, and intelligence queries. The difference was intentionality—we understood what the output meant. Using open-source intelligence platforms and carefully crafted fingerprints, we mapped over a hundred active domains following similar patterns. Each one shared the same architecture, the same weaknesses, the same developer mistakes. This repeatability became our advantage. When scammers can redeploy infrastructure in days, you don't attack individual sites—you automate the entire reconnaissance-to-evidence pipeline. This talk demonstrates practical techniques for mass-scale fraud infrastructure fingerprinting, operational security considerations when investigating active criminal operations, and methods to recognize AI-generated code patterns that reveal threat actor sophistication. We'll discuss the ethical boundaries of counter-fraud operations and evidence preservation for law enforcement, along with automation strategies for sustainable threat intelligence when adversaries rebuild faster than you can report. The demonstration will show how to go from a single suspicious domain to a network map of 100+ sites and thousands of victim records—using tools available to any researcher. This isn't a story about elite hackers versus criminal masterminds. It's about two groups equally reliant on AI vibing their way through technical problems—one for fraud, one for justice. The skill barrier has collapsed. The question now is: who has better context, better ethics, and better coffee? Chiao-Lin Yu (Steven Meow) https://events.ccc.de/congress/2025/hub/event/detail/when-vibe-scammers-met-vibe-hackers-pwning-phaas-with-their-own-weapons https://cfp.cccv.de/39c3/talk/QCGR7L/ https://cfp.cccv.de/39c3/talk/QCGR7L/feedback/ false 2025-12-28T23:55:00+01:00 23:55 00:40 Zero 39c3-the-small-packet-of-bits-that-can-save-or-destabilize-a-city en Security Talk The Emergency Alert System (EAS) and its SAME (Specific Area Message Encoding) protocol are public alerting technologies that broadcast short digital bursts over VHF triggering emergency messages on millions of receivers across North America. In Mexico, this technology was integrated into the Seismic Alert System (SASMEX) which more than 30 million people in the central part of the country rely on to prepare for frequent earthquakes. While new alerting technologies have emerged, the EAS-SAME network continues to play an important role for public safety in the U.S., Mexico, and Canada. Yet, the same small packets of bits that can help protect a city could also, in the wrong hands, destabilize it. This talk examines how these systems operate and reveals a troubling truth: spoofing these alerts is far easier than most people expect. In this talk, we’ll begin by contextualizing the importance of the seismic alert in Mexico City, a system born from the devastating 1985 earthquake. We’ll examine how it was designed, how it works, and why it carries such a deep psychological impact. From there, we’ll explore the history and design of Weather Radio and the SAME protocol, looking at how messages are transmitted and encoded through this technology, and how it was later adapted for SASMEX. I’ll also share my personal experience building compatible receivers, from early open-source experiments that inspired local manufacturers to create government-certified devices, to developing a receiver as part of my undergraduate thesis. We’ll analyze how simplicity, one of the key strengths of these systems, also introduces certain risks, and how these trade-offs emerge when dealing with accessibility, interoperability, and security in system design. Finally, I’ll demonstrate how to receive, decode, and encode these alert messages, and discuss how, with the right equipment, it’s possible to generate such alert signals. Manuel Rábade https://events.ccc.de/congress/2025/hub/event/detail/the-small-packet-of-bits-that-can-save-or-destabilize-a-city https://cfp.cccv.de/39c3/talk/WRWCKR/ https://cfp.cccv.de/39c3/talk/WRWCKR/feedback/ false 2025-12-28T11:00:00+01:00 11:00 01:00 Fuse 39c3-digitale-inklusion-wie-wir-digitale-barrierefreiheit-fur-alle-erreichen-konnen de Ethics, Society & Politics Talk Könntest du jetzt noch sagen, was du heute online gemacht hast? Für viele ist das Internet so selbstverständlich, dass sie es kaum noch merken, wenn sie es benutzen. Dennoch sind viele Menschen unfreiwillig aus der digitalen Welt ausgeschlossen. Wie könnte das Internet für alle nutzbar werden? Für viele Menschen ist es selbstverständlich, online unterwegs zu sein. Dennoch sind weiterhin viele Menschen mit Beeinträchtigung online ausgeschlossen. Seit Juni 2025 sind durch das Barrierefreiheitsstärkungsgesetz ist digitale Barrierefreiheit für Unternehmen verpflichtend. Damit ist digitale Barrierefreiheit von einer Option zu einem Recht geworden. Trotz der gesetzlichen Vorgaben scheitert die digitale Barrierefreiheit in der Praxis häufig an der fehlenden Expertise von Verantwortlichen. Wir möchten aus drei Perspektiven auf Barrierefreiheit in der digitalen Welt schauen: Lena Müller ist Entwicklerin und für die barrierefreie Gestaltung von Inhalten verantwortlich. Kathrin Klapper promoviert und nutzt in ihrem Alltag zum Sprechen einen Sprachcomputer mit Augensteuerung. Und Jakob Sponholz setzt sich in seiner Forschung mit der Frage auseinander, wie digitale Medien zur Inklusion beitragen können. Wir möchten zunächst einen Einblick in die Mechanismen geben, die digitale Inklusion verhindern - sowohl theoretisch als auch praktisch. Anschließend möchten wir anhand von einfachen Beispielen zeigen, dass der Einstieg in die Gestaltung von barrierefreien Inhalten eigentlich gar nicht so schwer ist und es sich lohnt, einfach anzufangen. https://cfp.cccv.de/media/39c3/submissions/TYX9VG/IMG_9887_j2MEwqX_lDI1yY6_oBqmKeW_LUKCPJ_bma19wF.webp Jakob Sponholz Kathrin Klapper Lena Christina Müller https://events.ccc.de/congress/2025/hub/event/detail/digitale-inklusion-wie-wir-digitale-barrierefreiheit-fur-alle-erreichen-konnen Link zum Projekt: Neue Stimme für Dozentin an der Universität zu Köln https://cfp.cccv.de/39c3/talk/TYX9VG/ https://cfp.cccv.de/39c3/talk/TYX9VG/feedback/ false 2025-12-28T12:15:00+01:00 12:15 01:00 Fuse 39c3-neue-chaos-events-inselchaos-und-hack-ma-s-castle-plaudern-aus-dem-nahkastchen de CCC & Community Talk Auf der Insel Rügen und in Österreich tut sich was - und zwar neue Chaos Events. Wir möchten über Anforderungen, Herausforderungen, Hürden, Erfahrungen und Glücksmomente aus unserer Sicht der Orga erzählen. Das InselChaos fand im LaGrange e.V. im September 2025 statt und bildet den Auftakt für weitere kreative, informative und chaotische Events auf der Insel Rügen. Das Håck ma’s Castle wird mit etwas Humor auch über Herausforderungen sprechen, welche unter anderem durch dezentrale Teams aus diversen Hackspaces entstehen. **InselChaos** Der Port39 e.V. hatte den Traum, das Chaos nach MV zu holen und ein größeres Event an der Ostsee zu veranstalten. Gerade erst 3 Jahre alt, haben wir mit der Planung in kleinem Kreis begonnen. Eine Location musste gesucht, Inspirationen und Ideen gesammelt, bürokratische Hürden und sehr viele individuelle Probleme gelöst werden, bis es Anfang September soweit war, dass wir unsere Gäste begrüßen durften. In diesem Talk sprechen wir darüber, wie es ist, als kleiner Verein mit einem vierköpfigen Orga-Team ein ChaosEvent mit über 150 Gästen zu koordinieren, welche Schwierigkeiten wir dabei überwunden und vor allem, welche Learnings wir daraus gezogen haben, um es nächstes Mal noch besser zu machen. **Håck ma’s Castle** Wir werden in unserem Talk, darüber sprechen, welche Methoden und Meetingmodi wir ausgetestet haben, gute wie aber auch schlechte Entscheidungen welche getroffen wurden. Vorallem aber auch über die Herausforderung, die es mit sich bringt, wenn sich Wesen noch nicht kennen und wir zuerst auf menschlicher Ebene auch zusammenkommen mussten, damit es inhaltlich auch besser klappt. Hard facts Håck ma's Castle: - 3 (+1) Tage Event - August 2024 - mit Schloss - mit Camping - ~330 Wesen - inklusive 1 Schlosskatze *meow* - Orga verteilt in ganz Österreich und darüber hinaus: - metalab, realraum, C3W, CCC Salzburg, /dev/lol, SegFaultDragons, SegVault, IT-Syndikat, /usr/space, Gebärdenverse, female coders, chaos.jetzt etc. Erwin Ernst "eest9" Steinhammer lasii Daniel Niklas https://events.ccc.de/congress/2025/hub/event/detail/neue-chaos-events-inselchaos-und-hack-ma-s-castle-plaudern-aus-dem-nahkastchen https://cfp.cccv.de/39c3/talk/F3LF7R/ HackMas Folien https://cfp.cccv.de/39c3/talk/F3LF7R/feedback/ false 2025-12-28T13:30:00+01:00 13:30 01:00 Fuse 39c3-selbstverstandlich-antifaschistisch-aktuelle-informationen-zu-den-verfahren-im-budapest-komplex-von-family-friends-hamburg de Ethics, Society & Politics Talk Mit den Prozessen im Budapest-Komplex wird ein Exempel statuiert - nicht nur gegen Einzelne, sondern gegen antifaschistische Praxis insgesamt. Die Behauptung einer kriminellen Vereinigung mit Mordabsichten stellt eine absurde juristische Eskalation des staatlichen Vorgehens gegen Antifaschist*innen dar und steht in keinem Verhältnis zu den verhandelten Vorkommnissen. Die Verfahren in dieser Weise zu verfolgen, lässt vor allem auf ein hohes Ausforschungs- und Einschüchterungsinteresse schließen. Mit dieser Prozesswelle und den Repressionen gegen Freund*innen und Angehörige wird antifaschistisches Engagement massiv kriminalisiert und ein verzerrtes Bild von politischem Widerstand gezeichnet - während gleichzeitig rechte Gewalt europaweit zunimmt und faschistische Parteien erstarken. Wir sehen, dass Angriffe auf Rechtsstaatlichkeit und Zivilgesellschaft immer weiter zunehmen. Die Art und Weise, wie gegen die Antifas im Budapest-Komplex und im Antifa-Ost Verfahren vorgegangen wird ist ein Vorgeschmack darauf, wie politische Opposition in einer autoritären Zukunft behandelt werden könnte. Wir sind alle von der rechtsautoritären Entwicklung, von Faschisierung betroffen. Die Kriminalisierung von Antifas als "terroristische Vereinigung" ist Teil einer (weltweiten) Entdemokratisierung und Zersetzung von Rechtsstaatlichkeit. Am 26. September wurde gegen Hanna vor dem OLG München das erste Urteil gegen eine der Antifaschist*innen im Rahmen des Budapest-Komplexes gefällt: 5 Jahre für ein lediglich auf Indizien basierendes Urteil. Dem Mordvorwurf der Staatsanwaltschaft wurde nicht entsprochen, behauptet wurde aber die Existenz einer gewalttätigen „kriminellen Vereinigung“. Am 12. Januar 2026 wird nun vor dem OLG Düsseldorf der Prozess gegen Nele, Emmi, Paula, Luca, Moritz und Clara, die seit Januar in verschiedenen Gefängnissen in U-Haft sitzen, eröffnet. Die Anklage konstruiert auch hier eine kriminelle Vereinigung nach §129 und enthält den Vorwurf des versuchten Mordes. Die Verfahren in dieser Weise zu verfolgen, lässt vor allem auf ein hohes Ausforschungs- und Einschüchterungsinteresse schließen. Zaid, gegen den ein europäischer Haftbefehl aus Ungarn vorliegt, war Anfang Mai unter Meldeauflagen entlassen worden; aufgrund seiner nicht-deutschen Staatsangehörigkeit hatte der Generalbundesanwalt keine Anklage gegen ihn erhoben. Da er in Deutschland nach wie vor von einer Überstellung nach Ungarn bedroht ist, hält er sich seit Oktober 2025 in Paris auf. Er ist gegen Auflagen auf freiem Fuß. Ein weiteres Verfahren im Budapest- Komplex wird in Dresden zusammen mit Vorwürfen aus dem Antifa Ost Verfahren verhandelt. Der Prozess gegen Tobi, Johann, Thomas (Nanuk), Paul und zwei weitere Personen wird bereits im November beginnen. In Budapest sitzt Maja – entgegen einer einstweiligen Verfügung des BVerfG und festgestellt rechtswidrig im Juni 2024 nach Ungarn überstellt - weiterhin in Isolationshaft; der Prozess soll erst im Januar fortgeführt werden und voraussichtlich mit dem Urteil am 22.01. zu Ende gehen. Mit den Prozessen im Budapest-Komplex wird ein Exempel statuiert – nicht nur gegen Einzelne, sondern gegen antifaschistische Praxis insgesamt. Die Behauptung einer kriminellen Vereinigung mit Mordabsichten stellt eine absurde juristische Eskalation des staatlichen Vorgehens gegen Antifaschist*innen dar und steht in keinem Verhältnis zu den verhandelten Vorkommnissen. Mit dieser Prozesswelle und den Repressionen gegen Freund*innen und Angehörige wird antifaschistisches Engagement massiv kriminalisiert und ein verzerrtes Bild von politischem Widerstand gezeichnet – während gleichzeitig rechte Gewalt europaweit zunimmt und faschistische Parteien erstarken. Wir sehen, dass Angriffe auf Rechtsstaatlichkeit und Zivilgesellschaf immer weiter zunehmen. Die Art und Weise, wie gegen die Antifas im Budapest-Komplex vorgegangen wird, ist ein Vorgeschmack darauf, wie politische Opposition in einer autoritäreren Zukunft behandelt werden könnte. Wir sind alle von der rechtsautoritären Entwicklung, von Faschisierung betroffen. Die Kriminalisierung von Antifas als „terroristische Vereinigung" ist Teil einer (weltweiten) Entdemokratisierung und Zersetzung von Rechtsstaatlichkeit. Andreas family & friends Hamburg Birgit family & friends Hamburg https://events.ccc.de/congress/2025/hub/event/detail/selbstverstandlich-antifaschistisch-aktuelle-informationen-zu-den-verfahren-im-budapest-komplex-von-family-friends-hamburg https://cfp.cccv.de/39c3/talk/DFFJ7G/ https://cfp.cccv.de/39c3/talk/DFFJ7G/feedback/ false 2025-12-28T14:45:00+01:00 14:45 00:40 Fuse 39c3-power-cycle-b7-oder-warum-kauft-man-eine-zeche de CCC & Community Talk Aus einem Barwitz wurde ein Projekt! Blumenthal7 ist die letzte vollständig erhaltene Schachtanlage des ehemaligen Steinkohlebergwerks General Blumenthal in Recklinghausen im nördlichen Ruhrgebiet. Nach diversen Startschwierigkeiten ist aus einer im Dornröschenschlaf liegenden Industriebrache ein Projekt geworden, das bereits jetzt einer Vielzahl von Entitäten und Gruppen eine Heimat und einen großen, nahezu grenzenlosen Spielplatz bietet. Begleitet uns gerne beim Power Cycle B7…! Wir – Mitglieder des Recklinghäuser Chaostreffs c3RE – haben gemeinsam mit einigen weiteren Menschen einen weiteren Verein gegründet, den Blumenthal7 e.V. Das Ziel ist, ein altes Steinkohlebergwerk zu kaufen, zu erhalten, zu renovieren und vielen Menschen als Raum für Chaos, Kreativität und Happenings zugänglich zu machen. Kohlenpod kater Stephan https://events.ccc.de/congress/2025/hub/event/detail/power-cycle-b7-oder-warum-kauft-man-eine-zeche https://cfp.cccv.de/39c3/talk/SYAF7Y/ Slides zum Talk https://cfp.cccv.de/39c3/talk/SYAF7Y/feedback/ false 2025-12-28T15:40:00+01:00 15:40 00:40 Fuse 39c3-uber-europaische-grenzen-hinweg-auf-klinischen-daten-rechnen-aber-sicher de Science Talk Der Trend geht dahin, aus Gesundheitsdaten große zentralisierte Datenbanken aufzubauen. Eine datensparsame Alternative dazu ist, in einem verschlüsseltem Netzwerk gemeinsam auf verteilten privaten Daten zu rechnen, ohne sie miteinander teilen zu müssen. Perspektivisch können so demokratischere Datenströme geschaffen werden, die Patient:innen als aktiv Teilhabende statt als passive Datenquellen einbinden. Kommt mit auf eine Reise, die vor sechs Jahren in Deutschland gestartet ist und jetzt die erste europäische klinische Studie mit Secure Multiparty Computation (SMPC) realisiert hat. **Klinische Forschung 101:** Warum sind "multizentrische" klinische Studien der Goldstandard und wie läuft das ab? Welche Daten werden da gesammelt und wie funktioniert in der Praxis der Datenaustausch? Was sagt die DSGVO dazu? **Sicheres verteiltes Rechnen 101:** Wie kann man in verschlüsselten peer-to-peer Netzwerken gemeinsam auf verteilten Daten rechnen, ohne die Eingabedaten untereinander austauschen zu müssen? Was sind technische Vor- und Nachteile? Was ändert das an den Rollen der Akteure im System? **Der Prototyp in Deutschland 2019:** Das LMU Klinikum in München kooperiert mit der Charité in Berlin und der TU München. Zum ersten Mal gelingt das gemeinsame Rechnen auf verteilten Patient:innendaten. Diverse lessons were learned. **Die erste europäische Studie 2024:** Das LMU Klinikum in München kooperiert mit der Policlinico Universitario Fondazione Agostino Gemelli in Rom. Aus der Pilotstudie ergibt sich auch ein DSGVO-konformer Blueprint und eine wiederverwendbare Architektur. **Fazit und Ausblick:** Sicheres verteiltes Rechnen in der Wissenschaft und darüber hinaus. Hendrik Ballhausen https://events.ccc.de/congress/2025/hub/event/detail/uber-europaische-grenzen-hinweg-auf-klinischen-daten-rechnen-aber-sicher https://cfp.cccv.de/39c3/talk/8WYX73/ slides https://cfp.cccv.de/39c3/talk/8WYX73/feedback/ true 2025-12-28T16:35:00+01:00 16:35 00:40 Fuse 39c3-auf-die-dauer-hilft-nur-power-herausforderungen-fur-dezentrale-netzwerke-aus-sicht-der-soziologie de Science Talk Der Vortrag diskutiert Herausforderungen dezentraler Netzwerke aus soziologischer Perspektive. Als dezentrale Netzwerke werden technische Infrastrukturen verstanden, die nicht von einer zentralen Autorität, sondern verteilt über Instanzen zur Verfügung gestellt werden. Nutzer:innen profitieren von dieser Infrastruktur, nutzen beispielsweise das Fediverse oder das Tor-Netzwerk, ohne zur Infrastruktur beizutragen. Zugleich können dezentrale Netzwerke nur dann bestehen, wenn hinreichende Ressourcen von Personen oder Organisationen mobilisiert werden, um das Netzwerk überhaupt zur Verfügung zu stellen. Dies führt zur originären Instabilität dezentraler Netzwerke, wenn nicht der Weg der Kommodifizierung des Nutzer:innenverhaltens eingeschlagen wird. Aufbauend auf dieser Zustandsbeschreibung, werden Bedingungen erörtert, um Kollektivgüter wie dezentrale Netzwerke organisatorisch (und nicht technisch) herzustellen. Hierzu zählen Partizipation oder die Idee einer öffentlichen Grundfinanzierung. Der Vortrag wird neben soziologischen Ideen und harten Zahlen auch durch eine ordentliche Portion Idealismus zu Fragen der Souveränität und Autonomität in der Digitalisierung motiviert. Die Soziologie hat immer etwas mitzuteilen, sobald Fragen kollektiven Handelns auftreten. Dies gilt sowohl für soziale wie auch digitale Räume. So hat der Soziologe Peter Kollock bereits in den 1990er Jahren festgestellt, „the Internet is filled with junk and jerks“ (Kollock, 1999, S. 220). Gegenwärtig dürfte die Mehrheit dieser Aussage anstandslos zustimmen. Aber dies ist nicht der entscheidende Punkt, sondern die weitere Beobachtung: „Given that online interaction is relatively anonymous, that there is no central authority, and that it is difficult or impossible to impose monetary or physical sanctions on someone, it is striking that the Internet is not literally a war of all against all” (1999, S. 220). Die Welt kennt inzwischen zahlreiche Gegenbeispiele, bei denen Autoritäten das Internet nutzen, um das Nutzungsverhalten zu monetarisieren oder Überwachungstechnologien zur Sanktionierung einsetzen (Zuboff, 2019). Diese Ausgangslage beziehe ich in meiner Forschung ein, wenn ich dezentrale Netzwerke wie das Fediverse oder das Tor-Netzwerk aus soziologischer Perspektive betrachte. In erster Linie bin ich daran interessiert zu verstehen, wie dezentrale Netzwerke – organisatorisch nicht technisch – entstehen und welche Herausforderungen es dabei zu überwinden gilt (Sanders & Van Dijck, 2025). Eine zentrale Motivation orientiert sich an der Frage, wie ein Internet ohne zentrale Autorität, verringert von Marktabhängigkeiten, resilient gegenüber Sanktionsmechanismen und Souverän bezüglich eigener Daten, aufgebaut werden kann. Motiviert durch diesen präskriptiven Rahmen, betrachte ich im Vortrag die Herausforderungen zunächst deskriptiv und beziehe meine soziologische Perspektive ein. Denn in der Regel profitieren Menschen, die einen Vorteil aus der Realisierung eines bestimmten Ziels ziehen, unabhängig davon, ob sie persönlich einen Anteil der Kooperation tragen – oder eben nicht. Das kollektive Handeln fällt mitunter schwer, obwohl oder gerade, weil ein begründetes kollektives Interesse zur Umsetzung eines bestimmten Zieles besteht. Gleiche Interessen sind nicht gleichbedeutend mit gemeinsamen Interessen. Diese Situationsbeschreibung ist vielfältig anwendbar von WG-Aufräumplänen bis zu Fragen der klimaneutralen Transformation. Der Grund ist, dass kollektives Handeln ein Mindestmaß an Zeit, Aufwand oder Geld verursacht, sodass vielfach ein Trittbrettfahren gewählt wird in der Hoffnung, dass immer noch genug andere kooperieren, um das gewünschte Ziel zu erreichen (Hardin, 1982). Aus dieser Perspektive betrachte ich dezentrale Netzwerke. So kann das Fediverse oder der Tor-Browser genutzt werden, ohne eine eigene Instanz oder Knoten zu hosten. Dies ist auch nicht das Ziel der genannten dezentralen Netzwerke. Dennoch: Die Kosten und der Aufwand für die technische Infrastruktur müssen von einem kleinen Teil getragen werden, während die überwältigende Mehrheit der Nutzer:innen von der Infrastruktur profitieren, ohne einen Beitrag zu dieser zu leisten. Dies führt zur originären Instabilität dezentraler Netzwerke und stellt eine relevante Herausforderung für die Zukunft dar. Während durch Netzwerkanalysen das Wachstum und die Verstetigung von dezentralen Netzwerken beschrieben wird, fehlt es an einem vertieften Verständnis über Bedingungen wie dezentrale Netzwerke überhaupt entstehen. Während des Vortrags werde ich empirische Daten zur Entwicklung des Fediverse und des Tor-Netzwerkes zeigen, um die Herausforderung zu verdeutlichen. Insbesondere das Tor-Netzwerk steht dabei vor dem Problem, dass die Möglichkeit zur De-Anonymisierung steigt, wenn die Anzahl an Knoten sinkt. Die Überwindung des von mir dargestellten Kollektivgutproblems nimmt demnach eine zentrale Rolle zur Aufrechterhaltung ein. Die Motivation sich mit dezentralen Netzwerken auseinanderzusetzen, resultiert aus der Umkehr der Argumentation, wenn Netzwerke über eine zentrale Autorität verfügen und zugleich in der Lage sind, Sanktionsmechanismen zu nutzen, beispielsweise um unliebsame User:innen zu sperren, das Nutzungsverhalten zu überwachen und zu monetarisieren (Zuboff, 2019). Hierbei beziehe ich mich offensichtlich auf die Entwicklung sozialer Medien, die das oben beschriebene Problem kollektiven Handelns durch Kommodifizierung der Infrastruktur lösen. Ähnliches ist aus dem Bereich der Kryptowährung bekannt, welche ebenfalls durch den individualisierten monetären Vorteil, das heißt der Verheißung einer Kapitalakkumulation, Kooperationsprobleme überwindet. Stellen wir uns so die Zukunft des Internets vor? Dezentrale Netzwerke sind nicht per se eine allumfassende technische Lösung für gesellschaftlich-soziale Probleme. Im Gegenteil: Dezentrale Netzwerke, wenn sie nicht auf Kommodifizierung basieren, unterliegen einer sozialen Ordnung, die sich eben nicht technisch lösen lässt. Ein Bewusstsein über die Notwendigkeit dezentraler Netzwerke ist hierbei leider nicht ausreichend, sondern es braucht Menschen und Organisationen, die bereit sind einen Teil der Infrastruktur zu tragen, ohne einen direkten Vorteil hiervon zu erhalten. Diese Selbstorganisation steht im Vergleich zu profitorientierten Unternehmen immer im Nachteil (Offe & Wiesenthal, 1980). In meiner Forschung verbinde ich mein Interesse an Grundstrukturen und Bedingungen sozialer Ordnung, wie dem Kooperationsproblem, mit dem Anspruch gesellschaftlicher Gestaltung. Allein das Bewusstsein über diese Bedingungen kann noch kein Kooperationsproblem lösen. Es kann allerdings helfen, den Rahmen dieser Bedingungen aktiv zu gestalten. Ich werde mich dabei zwischen kritischen Realitäten und hoffnungsvollen Ausblicken bewegen, denn ganz offensichtlich existieren dezentrale Netzwerke, die eine organisatorische und technische Alternative anbieten. Doch wie der Titel suggeriert, hilft hier auf die Dauer nur die (zivilgesellschaftliche) Power. Literatur Hardin, R. (1982). Collective Action. Hopkins University Press. Kollock, P. (1999). The Economies of Online Cooperation: Gifts and Public Goods in Cyberspace. In M. A. Smith & P. Kollock (Hrsg.), Communities in Cyberspace (S. 220–239). Routledge. Offe, C., & Wiesenthal, H. (1980). Two Logics of Collective Action: Theoretical Notes on Social Class and Organizational Form. Political Power and Social Theory, 1, 67–115. Sanders, M., & Van Dijck, J. (2025). Decentralized Online Social Networks: Technological and Organizational Choices and Their Public Value Trade-offs. In J. Van Dijck, K. Van Es, A. Helmond, & F. Van Der Vlist, Governing the Digital Society. Amsterdam University Press. https://doi.org/10.5117/9789048562718_ch01 Zuboff, S. (2019). Surveillance Capitalism—Überwachungskapitalismus. Aus Politik und Zeitgeschichte, 24–26, 4–9. Marco Wähner https://events.ccc.de/congress/2025/hub/event/detail/auf-die-dauer-hilft-nur-power-herausforderungen-fur-dezentrale-netzwerke-aus-sicht-der-soziologie https://cfp.cccv.de/39c3/talk/AEHLZT/ Präsentation des Vortrags https://cfp.cccv.de/39c3/talk/AEHLZT/feedback/ false 2025-12-28T17:35:00+01:00 17:35 00:40 Fuse 39c3-a-quick-stop-at-the-hostileshop en Security Talk HostileShop is a python-based tool for generating prompt injections and jailbreaks against LLM agents. I created HostileShop to see if I could use LLMs to write a framework that generates prompt injections against LLMs, by having LLMs attack other LLMs. It's LLMs all the way down. HostileShop generated prompt injections for a winning submission in OpenAI's GPT-OSS-20B RedTeam Contest. Since then, I have expanded HostileShop to generate injections for the entire LLM frontier, as well as to mutate jailbreaks to bypass prompt filters, adapt to LLM updates, and to give advice on performing injections against other agent systems. In this talk, I will give you an overview of LLM Agent hacking. I will cover LLM context window formats, LLM agents, agent vulnerability surface, and the prompting and efficiency insights that led to the success of HostileShop. [HostileShop](https://github.com/mikeperry-tor/HostileShop) creates a simulated web shopping environment where an **attacker agent LLM** attempts to manipulate a **target shopping agent LLM** into performing unauthorized actions. Crucially, HostileShop does not use an LLM to judge attack success. Instead, success is determined automatically and immediately by the framework, which reduces costs and enables rapid continual learning by the attacker LLM. HostileShop is best at discovering **prompt injections** that induce LLM Agents to make improper "tool calls". In other words, HostileShop finds the magic spells that make LLM Agents call functions that they have available to them, often with the specific input of your choice. HostileShop is also capable of [enhancement and mutation of "universal" jailbreaks](https://github.com/mikeperry-tor/HostileShop?tab=readme-ov-file#prompts-for-jailbreakers). This allows **cross-LLM adaptation of universal jailbreaks** that are powerful enough to make the target LLM become fully under your control, for arbitrary actions. This also enables public jailbreaks that have been partially blocked to work again, until they are more comprehensively addressed. I created HostileShop as an experiment, but continue to maintain it to let me know if/when LLM agents finally become secure enough for use in privacy preserving systems, without the need to rely on [oppressive](https://runtheprompts.com/resources/chatgpt-info/chatgpt-is-reporting-your-prompts-to-police/) [levels of surveillance](https://www.anthropic.com/news/activating-asl3-protections). https://cfp.cccv.de/media/39c3/submissions/9MALHD/HostileShop-Draft_tvTfj3n_l9hp86i_lDjcT_kynVAiK.webp Mike Perry https://events.ccc.de/congress/2025/hub/event/detail/a-quick-stop-at-the-hostileshop https://cfp.cccv.de/39c3/talk/9MALHD/ HostileShop Presentation Slides https://cfp.cccv.de/39c3/talk/9MALHD/feedback/ false 2025-12-28T19:15:00+01:00 19:15 00:40 Fuse 39c3-how-to-render-cloud-fpgas-useless en Security Talk While FPGA developers usually try to minimize the power consumption of their designs, we approached the problem from the opposite perspective: what is the maximum power consumption that can be achieved or wasted on an FPGA? Short answer: we found that it’s easy to implement oscillators running at 6 GHz that can theoretically dissipate around 20 kW on a large cloud FPGA when driving the signal to all the available resources. It is interesting to note that this power density is not very far away from that of the surface of the sun. However, such power load jump is usually not a problem as it will trigger some protection circuitry. This led us to the next question: would a localized hotspot with such power density damage the chip if we remain within the typical power envelope of a cloud FPGA (~100 W)? While we could not “fry” the chip or induce permanent errors (and we tried several variants), we did observe that a few routing wires aged to become up to 70% slower in just a few days of stressing the chip. This basically means that such an FPGA cannot be rented out to cloud users without risking timing violations. In this talk, we will present how we optimized power wasting, how we measured wire latencies with ps accuracy, how we attacked 100 FPGA cloud instances and how we can protect FPGAs against such DOS attacks. FPGA instances are now offered by multiple cloud service providers (including Amazon EC2 F1/F2 instances, Alibaba ECS Instances, and Microsoft Azure NP-Series). The low-level programmability of FPGAs allows implementing new attack vectors including DOS attacks. While some severe attacks (such as short circuits) cannot be easily deployed as users are prevented to load own configuration bitstreams on the cloud FPGAs, it has been demonstrated that it is possible to leak information (like cloud instance scheduling policies or the physical topologies of the FPGA servers) or to mount DoS attacks by excessive power hammering. For instance, basically all cloud FPGAs provide logic cells that can be configured as small shift registers. This allows building toggle-shift-registers with 10K and more flip-flops, which can draw over 1 KW power when clocked at a few hundred MHz. In our work, we created fast ring-oscillators that bypass all design checks applied during bitstream cloud deployment and how we achieved toggle rates of 8 GHz inside an FPGA by using glitch amplification. The latter one was calibrated with the help of a time-to-digital converter (TDC). As a first attack, we used power hammering to crash AWS F1 instances by increasing power consumption to 300 W (three times the allowed power envelope). We used physical unclonable functions (PUFs) to examine the behaviour of the attacked FPGA cloud instances and we found that most remained unavailable for several hours after the attack. As a more subtle attack, we tried to cause permanent damage to FPGAs in our lab by driving fast toggling signals to virtually any available wire (and primitive) into a small region of the chip. With this, we created hotspot designs that draw 130 W in less than 1% of the available logic and routing resources of a datacenter FPGA. Even though the achieved power density was excessive, it was insufficient to induce permanent damages. This is largely due to the area inefficiencies of an FPGA that limit the power density. For instance, FPGAs use large multiplexers to implement the switchable connections and there exists only one active path that is routed through the multiplexers, hence, leaving most of the transistors sitting idle. Similarly, FPGAs provide a large number of configuration memory cells (about 1 Gb on a typical datacenter device) that draw negligible power as these do not switch during operation. All these idle elements force the power drawing circuits to be spread out, hence limiting power density. Anyway, when experimenting with different hotspot variants, we found thermal runaway effects and excessive device aging with up to a 70% increase in delay on some wires. We achieved this aging in just a few days and under normal operational conditions (i.e. by staying within the available power budget and having board cooling running). Such a large increase in latency can be considered to render an FPGA useless as it will usually not be fast enough to host (realistic) user designs. Beyond exploring these attack vectors, we developed countermeasures and design guidelines to prevent such attacks. These include scans of the user designs, use restrictions to resources like IOs and clock trees, as well as runtime monitoring and FPGA health checks. With this, we believe that FPGAs can be operated securely and reliably in a cloud setting. Dirk https://events.ccc.de/congress/2025/hub/event/detail/how-to-render-cloud-fpgas-useless https://cfp.cccv.de/39c3/talk/THUEYF/ draft slides draft slides final https://cfp.cccv.de/39c3/talk/THUEYF/feedback/ false 2025-12-28T20:10:00+01:00 20:10 00:40 Fuse 39c3-trump-government-demands-access-to-european-police-databases-and-biometrics en Ethics, Society & Politics Talk The USA is demanding from all 43 countries in the "Visa Waiver Programme" (VWP), which enables visa-free travel, to conclude an "Enhanced Border Security Partnership" (EBSP). This is intended to grant US authorities direct access to police databases in these - mostly European - countries containing fingerprints, facial images and other personal data. Anyone who refuses this forced "border partnership" faces exclusion from the visa-free travel programme. The US demand is unprecedented: even EU member states do not grant each other such extensive direct database access – normally the exchange takes place via the "hit/no-hit principle" with a subsequent request for further data. This is how it works, for example, in the Prüm Treaty among all Schengen states, which has so far covered fingerprints and DNA data and is now also being extended to facial images. The EBSP could practically affect anyone who falls under the jurisdiction of border authorities: from passport controls to deportation proceedings. Under the US autocrat Donald Trump, this is a particular problem, as his militia-like immigration authority ICE is already using data from various sources to brutally persecute migrants – direct access to police data from VWP partners could massively strengthen this surveillance apparatus. Germany alone might give access to facial images of 5.5 million people and fingerprints of a similar dimension. The USA has already tightened the Visa Waiver Programme several times, for instance in 2006 through the introduction of biometric passports and in 2008 through the ESTA pre-registration requirement. In addition, there were bilateral agreements for the exchange of fingerprints and DNA profiles – however, these may only be transmitted in individual cases involving serious crime. Existing treaties such as the EU-US Police Framework Agreement are not applicable to the "Enhanced Border Security Partnership", as it applies exclusively to law enforcement purposes. It is also questionable how the planned data transfer is supposed to be compatible with the strict data protection rules of the GDPR. The EU Commission therefore wants to negotiate a framework agreement on the EBSP that would apply to all member states. Time is running short: the US government has set VWP states a deadline of 31 December 2026. Some already agreed on a bilateral level. https://cfp.cccv.de/media/39c3/submissions/VQQYUT/APC-kiosks_JmiOVk8_5HPdwDu.webp Matthias Monroy https://events.ccc.de/congress/2025/hub/event/detail/trump-government-demands-access-to-european-police-databases-and-biometrics https://cfp.cccv.de/39c3/talk/VQQYUT/ Presentation https://cfp.cccv.de/39c3/talk/VQQYUT/feedback/ false 2025-12-28T21:05:00+01:00 21:05 00:40 Fuse 39c3-power-cycles-statt-burnout-wie-einflussnahme-nicht-verpufft de Ethics, Society & Politics Talk Zwischen offenen Briefen, Massenmails, Petitionen und Kaffee trinken : Zwei Ex-Insiderinnen aus dem Digitalausschuss und Bundestag erzählen, wie politische Einflussnahme wirklich funktioniert. Ein ehrlicher Blick hinter die Kulissen parlamentarischer Entscheidungsfindung – mit praktischen Tipps, wie die Zivilgesellschaft ihre Energie dort einsetzt, wo sie wirklich Wirkung entfaltet. Ziel des Talks ist es, ein realistisches Bild davon zu vermitteln, wie parlamentarische Entscheidungsfindung funktioniert – und praktische Hinweise zu geben, wie man Einfluss nehmen kann, ohne dabei Ressourcen zu verschwenden. Wie bringt man politische Prozesse in Bewegung? Was passiert eigentlich mit einer Mail, wenn sie an einen Abgeordneten geht? Und wie unterscheidet sich konstruktive Interessenvertretung von übergriffigem Lobbyismus? In diesem Talk berichten Anna Kassautzki (Mitglied des Bundestags von 2021 bis 2025, stellvertretende Vorsitzende des Digitalausschusses 20. LP) und Rahel Becker (ehemalige wissenschaftliche Mitarbeiterin Digitales) aus der Innenperspektive parlamentarischer Arbeit. Chatkontrolle, Data Act, Recht auf Open Data, DSGVO, es gab viel zu verhandeln in der letzten Legislaturperiode. Anna und Rahel waren mittendrin und geben einen Einblick in die hektische - teils absurde Kommunikation mit Interessenvertretungen. Dabei liegt der Fokus immer auf der Frage: Welche Strategien braucht es, damit zivilgesellschaftliche Arbeit nicht verpufft? Zugleich geht es um die strukturellen Fragen: Wo sind die Flaschenhälse für politischen Fortschritt? Wie priorisieren Abgeordnete in einem überfüllten Kalender? Und welche Hebel kann die (digitale) Zivilgesellschaft sinnvoll nutzen, um Gehör zu finden? Denn gerade in Zeiten massiver digitalpolitischer Herausforderungen ist informierte, strategische Beteiligung notwendiger denn je. Ein Vortrag für alle, die sich in politische Prozesse einmischen wollen. Rahel Becker Anna Kassautzki https://events.ccc.de/congress/2025/hub/event/detail/power-cycles-statt-burnout-wie-einflussnahme-nicht-verpufft https://cfp.cccv.de/39c3/talk/ZCN7PG/ https://cfp.cccv.de/39c3/talk/ZCN7PG/feedback/ false 2025-12-28T22:05:00+01:00 22:05 00:40 Fuse 39c3-machine-vision-vom-algorithmus-zum-baumpilz-im-digitalen-metabolismus de Art & Beauty Talk Milliarden von Kameras produzieren täglich Bilder, die zunehmend von Maschinen analysiert werden. In dieser Lecture Performance beleuchten wir die Entwicklung des maschinellen Sehens – von den frühen algorithmischen Ansätzen bis zu den heutigen Anwendungen – und schauen, wie verschiedene Künstler:innen diese Technologien nutzen und reflektieren. Anhand der beiden Arbeiten „Throwback Environment” und „Fomes Fomentarius Digitalis” betrachten wir die Nutzung des maschinellen Sehens in einem künstlerischen Feedback-Loop. Die Arbeiten machen sichtbar, was die eingesetzten Algorithmen sehen und in welchen Mustern sie operieren. Unmengen an Bilder werden Täglich in die Netzwerke hochgeladen. Doch nicht nur Menschen betrachten diese Bilder, auch Maschinen analysieren und „betrachten" sie. Wie funktioniert dieses maschinelle „Sehen" und wie wurde dieses den Computern beigebracht? Diese Lecture Performance gibt einen Überblick über die Entwicklung des maschinellen Sehens. Nach einem kurzen Einblick in die geschichtliche Entwicklung – von den ersten Ansätzen bis zu heutigen Anwendungen – betrachten wir, wie diese Technologien in unterschiedlichsten künstlerischen Arbeiten eingesetzt werden. Was reflektieren diese Arbeiten jenseits der reinen Anwendung von Machine Vision Algorithmen? Anhand der beiden Arbeiten "Throwback Environment" und "Fomes Fomentarius Digitalis" betrachten wir, wie Machine Vision in einem künstlerischen Feedbackloop genutzt worden ist und wie uns dies Perspektiven auf die Funktionsweise dieser Algorithmen eröffnet. Die Arbeiten machen sichtbar, was die Eingesetzten Alghorithmen sehen, in welchen Mustern sie operieren. Sie zeigen auch, wo ihre Grenzen liegen und was das ganze mit Baumpilzen zu tun hat. https://cfp.cccv.de/media/39c3/submissions/QWFPYT/Fomes_Fomentarius_Digitalis_Thomas_Knus_OQOGL1r.webp Thomas Knüsel https://events.ccc.de/congress/2025/hub/event/detail/machine-vision-vom-algorithmus-zum-baumpilz-im-digitalen-metabolismus Fomes Fomentarius Digitalis Throwback Environment https://cfp.cccv.de/39c3/talk/QWFPYT/ https://cfp.cccv.de/39c3/talk/QWFPYT/feedback/ false 2025-12-28T23:00:00+01:00 23:00 01:30 Fuse 39c3-the-maybe-talent-show en Entertainment Game show Come on stage and present things you are very bad in. Or just mediocre. Get raging applause and love from the audience! Hosted by the drag-quings Norman Müller-Schmitz and James Bonne d'age this open stage celebrates trying, failing and the beauty of discovering hidden Talents together when the most beautiful cuties from the audience enter the stage to try something they have absolutely no experience in. The show is an open format that gives people the space to show themselves, be visible and make themselves vulnerable. We bring a queer format that celebrates people for simply being humans to Hamburgs neighborhood pubs, autonomous stages and other easily accessible spaces. In doing so it's explicitly anti-capitalist, builds communities and unlikely alliances. Not just in the hacker/CCC community we applaud the cool things people can do: The big stage is often reserved for outstanding achievements; attention and social credits usually go to those who already have the network and skills. While we consider celebrating success to be absolutely necessary, we see the need to give people space to try things out, to fail publicly without having to be ashamed, and to celebrate Imperfection. Stage presence comes from trying on stage, and the Maybe Talent Show is the place where this is possible for everyone. Inclusive, hilarious and without making fun of anyone. Promise. Norman Müller-Schmitz lukas-schmukas James Bonne d'age https://events.ccc.de/congress/2025/hub/event/detail/the-maybe-talent-show https://cfp.cccv.de/39c3/talk/DXSRB7/ https://cfp.cccv.de/39c3/talk/DXSRB7/feedback/ true 2025-12-28T12:00:00+01:00 12:00 03:00 Am Spätverkauf 39c3-a-blast-from-the-y2k-past-grunspan-rock-metal en DJ-Set DJ Set A time travel DJ set back to the times of the millennium change… … to the times of the prevented [Y2K apocalypse](https://en.wikipedia.org/wiki/Year_2000_problem) … to the times of the [Dot-com bubble](https://en.wikipedia.org/wiki/Dot-com_bubble) (… it’s about time AI, isn’t it?) … to the times of a [VERY problematic seed being planted](https://en.wikipedia.org/wiki/2000_Russian_presidential_election) … but most importantly to the times of the glorious: [| G.--. || R.--. || Ü.--. || N.--. || S.--. || P.--. || A.--. || N.--. |](https://www.gruenspan.de/) Back when ROCK was alive and kickin’ in „Hamburg meine Perle“! So, if you want to get a LOUD blast from the past - come join us and bring your [Pommesgabel](https://de.wikipedia.org/wiki/Mano_cornuta) with you! Live long and prosper, [DJ Alex](https://mstdn.social/@alexthurow/110279531725018974) (AKA: [https://onmoderndev.de](https://onmoderndev.de)) https://cfp.cccv.de/media/39c3-call-for-punk/submissions/JNWURM/2022_12_16-182345a-grunsp_PB9iqNb.webp Alex Thurow https://events.ccc.de/congress/2025/hub/event/detail/a-blast-from-the-y2k-past-grunspan-rock-metal https://cfp.cccv.de/39c3-call-for-punk/talk/JNWURM/ true 2025-12-28T15:00:00+01:00 15:00 00:15 Am Spätverkauf 39c3-erkundung-linker-utopien-mit-der-bravo-der-antifa de Antifa Lightning Talk Straßen aus Zucker lädt ein zur Frage: Sind linke Utopien tot – oder nötiger denn je? Spoiler: Aufgeben ist keine Option. Der Klimawandel. Trump, die AfD und all ihre Fans. Krieg und Terror. Die Dauerschleife der Weltkrisen und das vermeintliche Ende der progressiven Jugend. Die 1930er-Vibes, spürst du sie auch? Ist das etwa das Ende linker Utopien? Rette sich, wer kann? Ruhestand auf Keta? Nicht jetzt, nicht hier, nicht wir. Aufgeben ist keine Option. Aber nicht deshalb, weil es schlechter Stil wäre. Sondern deshalb, weil linke Utopien alles andere als vorbei sind. Sie sind da, sie sind nötig, sie sind machbar. Das linke Jugendblatt "Straßen aus Zucker" läd am Späti ein zur Frage: Wo stecken sie noch, die linken Utopien? ... das sind wir: https://www.strassenauszucker.tk/ ... & unsere aktuelle Ausgabe: https://www.strassenauszucker.tk/wp-content/uploads/2025/02/SaZ18_Utopie.pdf https://cfp.cccv.de/media/39c3-call-for-punk/submissions/QERFNX/Eigenwerbung-1_s6jKw55_g5bVKZt.webp Sassi https://events.ccc.de/congress/2025/hub/event/detail/erkundung-linker-utopien-mit-der-bravo-der-antifa https://cfp.cccv.de/39c3-call-for-punk/talk/QERFNX/ true 2025-12-28T15:20:00+01:00 15:20 00:15 Am Spätverkauf 39c3-infrastruktur-fur-aktivistis de Antifa Lightning Talk Aktivistis haben das Problem, dass sie sich Hauptsächlich um ihre Aktion kümmern wollen. Da bleibt oft keine Zeit zu entscheiden, wie eine sichere Infrastruktur gestaltet werden kann. Ich möchte einmal vorstellen, was unsere Gruppe als Idee hat um dieses Problem zu lösen. Der Code hierfür ist noch nicht fertig, das ist eine Konzept vorstellung. Aktivistis haben das Problem, dass sie sich Hauptsächlich um ihre Aktion kümmern wollen. Da bleibt oft keine Zeit zu entscheiden, wie eine sichere Infrastruktur gestaltet werden kann. Ich möchte einmal vorstellen, was unsere Gruppe als Idee hat um dieses Problem zu lösen. Hierfür haben wir ein Programm geplant, welches einen Kubernetescluster zusammen stellt und diesen Korrekt einstellt. Zusätzlich soll es eine Oberfläche geben um sich Applikationen dazu zu buchen. Hier wird erstmal nur ein Konzept vorgestellt um auch Personen zu finden die hier mitarbeiten möchten. w1ntermute https://events.ccc.de/congress/2025/hub/event/detail/infrastruktur-fur-aktivistis https://cfp.cccv.de/39c3-call-for-punk/talk/ZER37T/ true 2025-12-28T15:40:00+01:00 15:40 00:15 Am Spätverkauf 39c3-climatepoetryorg en Antifa Lightning Talk Climatepoetry.org started as a project for writing and collecting songs about climate change. The songs have been used in sing-along events and climate protests, but during the three years the project has existed, the political climate in Sweden has changed. Peaceful singing has been met with hateful rhetoric from the government and repression from the police. It became clear that anti-fascist activism has to be an integrated part of the Climatepoetry.org project, and not a separate activity. Climatepoetry.org started as a project for writing and collecting songs about climate change. The songs have been used in sing-along events and climate protests, but during the three years the project has existed, the political climate in Sweden has changed. Peaceful singing has been met with hateful rhetoric from the government and repression from the police. It became clear that anti-fascist activism has to be an integrated part of the Climatepoetry.org project, and not a separate activity. At the event, we will present the climatepoetry.org project and sing some of the songs. Magnus Ahltorp Maria Skeppstedt https://events.ccc.de/congress/2025/hub/event/detail/climatepoetryorg https://cfp.cccv.de/39c3-call-for-punk/talk/7RU38E/ true 2025-12-28T19:00:00+01:00 19:00 00:30 Am Spätverkauf 39c3-punkrock-songtext-lesung de Live Performance live performance Kultivierte Personen rezitieren Punkrock-Songtexte mit der ganzen Ernsthaftigkeit und dem dramatischen Pathos, wie sonst nur von Goethe-Abenden im Literaturhaus bekannt. Anarchie meets Bildungsbürgertum. Chaos meets Chaiselongue. Stell dir vor: gedämpftes Licht, ehrfürchtige Congress-Stille, vielleicht ein Glas Rotwein. Eine Mateflasche fällt um und niemand applaudiert. Sei bereit für eine Stunde voller lyrischer Hochkultur. Doch statt Rilke und Schiller erklingen die unsterblichen Verse der Kassierer – vorgetragen mit jener getragenen Feierlichkeit, die man eigentlich für Sturm und Drang reserviert. Was passiert, wenn man "Das schlimmste ist, wenn das Bier alle ist" behandelt wie Heines "Loreley"? Wenn Strophen über Zerstörung und Rebellion plötzlich die gleiche ehrfurchtsvolle Interpretation erfahren wie Weimarer Klassik? Wir präsentieren: Die große Versöhnung zwischen Sicherheitsnadel und Smoking, zwischen Moshpit und Musensaal. Entdecke die verborgene Poesie im Pogo, die Metaphorik im Mittelfinger, und die überraschende Erkenntnis, dass "Keine Macht für Niemand" eigentlich erstaunlich gut klingt, wenn man es ausspricht wie ein frisch ausgegrabenes Goethe-Fragment. Hochkultur ist auch nur Punk mit besseren Manieren. https://cfp.cccv.de/media/39c3-call-for-punk/submissions/KJ38N3/IMG_3542_P7tMbJO_nwFeLxK.webp tomate anna https://events.ccc.de/congress/2025/hub/event/detail/punkrock-songtext-lesung https://cfp.cccv.de/39c3-call-for-punk/talk/KJ38N3/ true 2025-12-28T21:00:00+01:00 21:00 01:00 Am Spätverkauf 39c3-4ever-punk en DJ-Set DJ Set one hour of punk music, encompassing many different styles Let's rock with the rebellious, radical and revolutionary rhymes and rhythms! Listen and celebrate to various kinds of punk music from all over the world. I am punk-rocker at heart since my early youth and simply love the music! This love is what I want to share with you acoustically. https://cfp.cccv.de/media/39c3-call-for-punk/submissions/HETKAT/djB_BN6tjVI_ObwgRfs.webp DJ Baba Grande https://events.ccc.de/congress/2025/hub/event/detail/4ever-punk https://cfp.cccv.de/39c3-call-for-punk/talk/HETKAT/ true 2025-12-28T22:00:00+01:00 22:00 00:30 Am Spätverkauf 39c3-antifaschistischer-akkordeon-punk-grolen-gegen-rec de Live Performance live performance Klassiker des antifaschistischen Deutschpunk-Liedguts – von Die Ärzte über Die Toten Hosen bis WIZO und Terrorgruppe – neu interpretiert auf dem Akkordeon. Laut, links und garantiert mitgröltauglich. Begleitet von harmonischen Akkordeonklängen stimmen wir gemeinsam antifaschistische Klassiker des deutschen Punks an, um sie stilgerecht zusammen zu grölen. Auf dem Programm stehen Songs von WIZO, Die Ärzte, Terrorgruppe und Die Toten Hosen. Es ist die perfekte Gelegenheit, sich im Kreise Gleichgesinnter den Frust über den Rechtsruck der Gesellschaft von der Seele zu schreien. Textsicherheit ist nicht nötig, für Spickzettel ist gesorgt. Der Akkordeonspieler Pianostein machte nicht nur durch zahlreiche Gastauftritte bei Bands wie Die Toten Hosen, Sondaschule, Dritte Wahl oder Rogers von sich reden – sondern vor allem durch seine legendären Klo-Konzerte bei deren Shows. Ganz nach dem Motto: Wo Menschen zusammenkommen und eine Haltung teilen, reicht ein Akkordeon, um alle zum Grölen zu bringen und den Moment unvergesslich zu machen. https://cfp.cccv.de/media/39c3-call-for-punk/submissions/CMBEQQ/8469_477643595645502_1328_VjbJkhF.webp Pianostein https://events.ccc.de/congress/2025/hub/event/detail/antifaschistischer-akkordeon-punk-grolen-gegen-rec https://cfp.cccv.de/39c3-call-for-punk/talk/CMBEQQ/ true 2025-12-28T18:00:00+01:00 18:00 01:00 Chaos Computer Music Club 39c3-kenji-tanaka-live-insights-into-my-workflow-struct de Music Workshop How does live techno work? On the dance floor, it's practically impossible to understand what's happening up front. It's also irrelevant there, because it's all about the music and many other things. Live sets have a thousand faces. Everyone has their own workflow, and there are countless approaches to performing electronic music. I don't know all of them, but I will give a deeper insight into the architecture of my setup in this short presentation. I explain my approach to improvising techno in clubs and at festivals. There will be a few technical insights into my „Ableton“ structure. A fixed structure with an unknown outcome. Because at certain points, I rely on random generators to create the desired element of surprise. This keeps me inspired for hours, again and again. I will show and explain why I make music this way. Kenji Tanaka https://events.ccc.de/congress/2025/hub/event/detail/kenji-tanaka-live-insights-into-my-workflow-struct https://cfp.cccv.de/39c3-chaos-computer-music-club/talk/89VNQT/ true 2025-12-28T19:00:00+01:00 19:00 02:00 Chaos Computer Music Club 39c3-sportbrigade-sparwasser de DJ-Set DJ Set We are well aware of the fact, that as DJs we play other peoples´(as well as our own) music. This means we want to ensure the musicians get the credit and respect they deserve for their work. Whenever reasonably possible (communication get quite intense for us at times) we´ll be happy to supply track IDs, although sometimes it may take a little while. Also we´re happy about reposts if you like what we´re doing. Hüp Now https://events.ccc.de/congress/2025/hub/event/detail/sportbrigade-sparwasser https://cfp.cccv.de/39c3-chaos-computer-music-club/talk/WAVVQB/ true 2025-12-28T21:00:00+01:00 21:00 01:00 Chaos Computer Music Club 39c3-the-39c3-drag-show en Live Performance live performance Finally a drag show at the chaos! Blinking lights, colorful outfits, and queers everywhere already seems normal at the congress. So how can it be, that all of this did not come together as drag on stage?! It is time for a really awesome, great drag show at the 39c3! And to show right away how divers drag is, a wonderful cast of drag artists of various genders and expressions can spread their queer joy and art for the audience. The show is hosted by Milky Gay, the nerdiest drag king from NRW, who does not only want to throw glitter at the congress incognito this year. And he is bringing an amazing cast with him Bingus Bongus (Drag Queen, Hamburg) Neuro Spicy (Drag King, NRW) Missass Nostalgia (Drag Queen, NRW) and Kaín Mensch (Drag Thing, Hamburg) will bring their queer art to finally merge chaos and drag! Everyone is welcome, we are trying to have as little barriers as possible to come and watch. No blinking lights during the show (no guarantee for the path there and acts before and after), Music Club accessible with mobility aids and wheel chairs (ask assigned angles). Mostly standing room, few seats at the side might not allow for a good view of the show. Content notes for certain parts of the show include death, cancer, violence, fake weapons, and sexual violence, and will be announced in time so people can leave and come back afterwards. Cheering is encouraged, so it might get loud. (more details tba). Please be nice to each other and especially help short people as well as queers to find a spot where they can see enough. Also, as drag is expensive, there will be a tipping round in the end - please bring some cash if you consider tipping the artists, but of course you are also welcome either way. Keks https://events.ccc.de/congress/2025/hub/event/detail/the-39c3-drag-show https://cfp.cccv.de/39c3-chaos-computer-music-club/talk/V9WGVB/ Poster true 2025-12-28T22:00:00+01:00 22:00 02:00 Chaos Computer Music Club 39c3-hitstorm-aka-the-jakob-sister-b2b-raverpik en DJ-Set DJ Set This DJ Team the combines all the Sachsentrance craziness :D since both DJs run the Sachsentrance Label and organize their famous events, widely known for their ecstatic vibes. It's pure Joy! The whole Sachsentrance vibe packed in one DJ Team. With their energizing DJ presence, they always bring the dancefloor on fire. The music they play is mostly produced in the 90s and 2000s ranging from popular rave hymns to underground techno and trance tracks. Over the years they gathered a huge treasure of hits. They love to surprise with unconventional tracks and unexpected genre cuts - you will never know what comes next. However, one thing is for sure: it's gonna be a banger! https://cfp.cccv.de/media/39c3-chaos-computer-music-club/submissions/GEK9WY/IMG_3169_bcSHALC.JPEG RaverPik https://events.ccc.de/congress/2025/hub/event/detail/hitstorm-aka-the-jakob-sister-b2b-raverpik https://cfp.cccv.de/39c3-chaos-computer-music-club/talk/GEK9WY/ true 2025-12-29T00:00:00+01:00 00:00 02:00 Chaos Computer Music Club 39c3-kenji-tanaka-live en Live Performance live performance In my improvised live set, my random generators and I bounce ideas off each other. This approach allows previously created loops to flow into endless new combinations. I love loopy and trippy techno. When dancing, I like to let go of everything around me and enter a deeper dialogue with myself. At this stage, I am 100% in tune with myself. This works for me when the groove drives me and the elements I hear are interesting but not too intrusive. That’s exactly what I love to create on the dance floor. To achieve this—and to create the necessary element of surprise—I combine different loops randomly and "blindly". Since I never know exactly what will happen, I am constantly surprised and inspired by the result. https://cfp.cccv.de/media/39c3-chaos-computer-music-club/submissions/C3CT3V/Kenji_Tanaka__jjF7TQ0.webp Kenji Tanak https://events.ccc.de/congress/2025/hub/event/detail/kenji-tanaka-live https://cfp.cccv.de/39c3-chaos-computer-music-club/talk/C3CT3V/ true 2025-12-29T02:00:00+01:00 02:00 02:00 Chaos Computer Music Club 39c3-tatendrangwav de DJ-Set DJ Set Seine Sets sind geprägt von düsteren, treibenden Beats und hypnotischen Grooves, die sich perfekt für Underground-Partys und nächtliche Dancefloors eignen. Tatendrang ist kein Mainstream-DJ, sondern ein klarer Szene-DJ, der sich auf spezielle, energiegeladene Sounds konzentriert und damit eine loyale Fangemeinde anspricht. Mit viel Gespür für Atmosphäre und Spannungsaufbau nimmt er sein Publikum mit auf eine intensive musikalische Reise. In seinen Sets widmet sich Tatendrang.wav vor allem dem Psytrance in seinen unterschiedlichen Facetten – von tiefen, psychedelischen Klanglandschaften bis hin zu druckvollen, treibenden Passagen. Sein Fokus liegt darauf, eine dichte Atmosphäre aufzubauen, die Körper und Geist gleichermaßen in Bewegung versetzt. Dabei geht es ihm weniger um schnelle Effekte, sondern um einen konstanten Flow, hypnotische Rhythmen und eine intensive Verbindung zum Dancefloor. Tatendrang.wav steht für authentische Underground-Vibes, kompromisslosen Sound und lange Nächte voller Energie, Psychedelic Feelings und ekstatischer Momente. https://cfp.cccv.de/media/39c3-chaos-computer-music-club/submissions/NBVQXD/WhatsApp_Imag_IU094Zl.webp Adnan https://events.ccc.de/congress/2025/hub/event/detail/tatendrangwav https://cfp.cccv.de/39c3-chaos-computer-music-club/talk/NBVQXD/ true 2025-12-29T04:00:00+01:00 04:00 02:00 Chaos Computer Music Club 39c3-mascha de DJ-Set DJ Set DJ and music producer >>currently hosting MUSTER show every month at @thfradio Born in Berlin 1996, MASCHA is a DJ and music producer, shaped by the city’s dancefloors and her deep roots in one of Berlin’s most renowned House & Techno clubs. Coming from a multi-generational musician family and a background in dance, she approaches DJing as movement and storytelling, her sets unfold with precision, tension, and emotional depth, delivering a 2-hour journey into hypnotic, tribal, and distinctly 90s-rooted soundscapes. Following her live set debut with an orchestra this year, MASCHA continues to push boundaries while staying grounded in the raw essence of club culture. https://cfp.cccv.de/media/39c3-chaos-computer-music-club/submissions/TRUKZQ/studio_s_w_20_dPBz7p9.webp Mascha https://events.ccc.de/congress/2025/hub/event/detail/mascha https://cfp.cccv.de/39c3-chaos-computer-music-club/talk/TRUKZQ/ true 2025-12-28T10:00:00+01:00 10:00 03:00 Chill Floor 39c3-etai-darway de DJ-Set DJ Set Dj Set Etai Darway A glamorous and rhythmic mood-swinging rollercoaster. https://cfp.cccv.de/media/39c3-chaos-computer-music-club/submissions/ULE8TC/etaidarway_lX_O9m2qQ6.webp Etai Darway https://events.ccc.de/congress/2025/hub/event/detail/etai-darway https://cfp.cccv.de/39c3-chaos-computer-music-club/talk/ULE8TC/ true 2025-12-28T13:00:00+01:00 13:00 03:00 Chill Floor 39c3-chaeza-doc de DJ-Set DJ Set Dj Set .. https://cfp.cccv.de/media/39c3-chaos-computer-music-club/submissions/BWPZZD/chaezadoc_xtL_jMAh1jb.webp chaeza + doc https://events.ccc.de/congress/2025/hub/event/detail/chaeza-doc https://cfp.cccv.de/39c3-chaos-computer-music-club/talk/BWPZZD/ true 2025-12-28T16:00:00+01:00 16:00 01:00 Chill Floor 39c3-lila-zoe-krau de Live Performance live performance L Twills aka Lila-Zoé Krauß ist Musikerin, Performerin und Multimedia-Künstlerin. In ihrer Arbeit entwickelt sie eine transdisziplinäre Opernpraxis, um Fragen zur (post-)moderner Subjektivität und ihrer Beziehung zu Medien, Trauma und Erinnerung zu thematisieren. Sie studierte Bildende Kunst an der HFBK Hamburg und dem CalArts Los Angeles sowie Sound Studies an der UdK Berlin. In ihrer Musik kombiniert sie Elemente aus Downtempo, Experimentalmusik, Breakbeat und Oper mit eigens entwickelten Sounddesign-Techniken. Krauß veröffentlichte 2020 und 2024 die Vinylalben [Freedom/Fiction] und [After her Destruction] und performte auf diversen Bühnen, u.a.: Documenta Fifteen (Kassel), Kampnagel (Hamburg), Volkstheater (Wien), Montez-Press Radio (NYC), NAVEL (Los Angeles). https://cfp.cccv.de/media/39c3-chaos-computer-music-club/submissions/JVLFE8/smaller-lila-3_pu98rF4.jpg Lila-Zoé Krauß https://events.ccc.de/congress/2025/hub/event/detail/lila-zoe-krau https://cfp.cccv.de/39c3-chaos-computer-music-club/talk/JVLFE8/ true 2025-12-28T17:00:00+01:00 17:00 02:00 Chill Floor 39c3-weebz en DJ-Set DJ Set WEEBZ likes to move between the odds, the rough and the soft: Breakbeat, dissonances, noise and sounds of deep dungeons belong to their mixes as well as the hymns of our hearts Most of the time the genres are mixed to an eclectic collection mirroring own confusions in the spirit of making the unmatching matching xx https://cfp.cccv.de/media/39c3-chaos-computer-music-club/submissions/7FTXUM/photo_2025-12_kEoCsT5.jpeg Weebz https://events.ccc.de/congress/2025/hub/event/detail/weebz https://cfp.cccv.de/39c3-chaos-computer-music-club/talk/7FTXUM/ true 2025-12-28T19:00:00+01:00 19:00 01:00 Chill Floor 39c3-gajek de Live Performance live performance Gajek produces and performs electronic music. Since 2014 He released five studio albums on Labels such as STROOM, Infinite Greyscale, Throttle Records and more. Gajek composes music for films and theatre. He has performed at major international venues and festivals such like Berghain, silent green, Printworks London, Traumabar Und Kino, ADE Amsterdam, Melt Festival and many more. Gajek lives and works in Berlin. https://cfp.cccv.de/media/39c3-chaos-computer-music-club/submissions/KKFMCH/Gajek-1_uprigh_5QVx0dk.jpg Unnamed user https://events.ccc.de/congress/2025/hub/event/detail/gajek https://cfp.cccv.de/39c3-chaos-computer-music-club/talk/KKFMCH/ true 2025-12-28T20:00:00+01:00 20:00 03:00 Chill Floor 39c3-fimi-nush de DJ-Set DJ Set Fimi&Nush https://cfp.cccv.de/media/39c3-chaos-computer-music-club/submissions/MTZ3G7/IMG_2183_PwZE_i0x8SWq.webp Hanni https://events.ccc.de/congress/2025/hub/event/detail/fimi-nush https://cfp.cccv.de/39c3-chaos-computer-music-club/talk/MTZ3G7/ true 2025-12-28T23:00:00+01:00 23:00 02:00 Chill Floor 39c3-felix-kubin de DJ-Set DJ Set Felix Kubin, funkensprühender Spannungs- und Weltenwandler aus Hamburg, Verachter der Nüchternheit, lenkt die musikalische Kompassnagel Richtung Stolperdisko, Art Pop und „gute Nervmusik“. Das Tanzbein zappelt, aber die Beine laufen in verschiedene Richtungen, denn sie haben sich noch nicht synchronisiert. Hier erklingen Songs am Rande des Nervenzusammenbruchs, "Musik für junge Leute" und alle, die nicht sterben wollen. Vor allem haben es ihm die obskuren Musikversuche der Heimstudios vergangener Fostex-Generationen angetan, die Art Brut und ihre Einfärbungen durch billige, leicht zu demolierende Technologien. Felix Kubins musikalische Adoleszenz wurde durch eine Zeit geprägt, in der sich die Szenen der Kunst und Musik stark durchdrangen und Songtitel wie "Die Gesunden kommen", "Adrenalin lässt das Blut kochen" und "Hosen, die nicht aneinander passen" kein Stirnrunzeln verursachten. Eine Zeit also, in der sich die Popmusik weit aus dem Fenster lehnte und die Luft einer fremden, seltsamen Welt atmete. https://cfp.cccv.de/media/39c3-chaos-computer-music-club/submissions/XURTWT/Kubin_King_in__HaBQHb1.JPG Felix Kubin https://events.ccc.de/congress/2025/hub/event/detail/felix-kubin https://cfp.cccv.de/39c3-chaos-computer-music-club/talk/XURTWT/ true 2025-12-29T01:00:00+01:00 01:00 03:00 Chill Floor 39c3-lina-nele-peng de DJ-Set DJ Set Nele, Peng and Lina are set to create a mesmerizing experience on the chillfloor 3c39, blending their unique artistic visions into a cohesive musical journey.Lina, with her innate talent and meticulous attention to detail, weaves ethereal melodies, esoteric rhythms, and wavey melancholy into a rich narrative. As an experienced curator of sound and atmosphere, she infuses her sets with her personal journey and history, selecting tracks that evoke deep emotions and resonate with her favorites.Nele and Peng complement Lina's artistry with their exceptional taste and ability to craft transcendental musical experiences. Each of them brings their unique flair, having proven their skills in various venues, including the renowned Kraniche bei den Elbbrücken.Together, this trio invites the audience to immerse themselves in a harmonious blend of sound, encouraging exploration of consciousness and connection with the ineffable beauty of music and place. https://cfp.cccv.de/media/39c3-chaos-computer-music-club/submissions/JMG833/FLORA-Image_Ed_lB0Tj2J.jpg Lina & Nele & Peng https://events.ccc.de/congress/2025/hub/event/detail/lina-nele-peng https://cfp.cccv.de/39c3-chaos-computer-music-club/talk/JMG833/ true 2025-12-29T04:00:00+01:00 04:00 03:00 Chill Floor 39c3-vvvvvai-steffen-bennemann de DJ-Set DJ Set VVVVVAI works with themes of duality, reflection, and temporal transitions. Geminiaquarius is an ongoing investigation into how states change, overlap, and coexist. The practice centers on reduction, attention, and slow unfolding. Steffen Bennemann has been active in the world of music for more than two decades. After many years as curator and promoter (Nachtdigital Festival), label owner (Holger Records) and DJ, he now focusses on his own sounds. Playing solo as well as in various collaborations, these sounds can be anything from Deep Sea Ambient to celestial Techno. https://cfp.cccv.de/media/39c3-chaos-computer-music-club/submissions/DDGDUZ/Bildschirmfot_cfG3VBI.webp VVVVVAI & Steffen Bennemann https://events.ccc.de/congress/2025/hub/event/detail/vvvvvai-steffen-bennemann https://cfp.cccv.de/39c3-chaos-computer-music-club/talk/DDGDUZ/ true 2025-12-28T18:00:00+01:00 18:00 02:00 Vorglühmarkt 39c3-loui-beton en DJ-Set DJ Set Lets get besinnlich at the 39C3 https://soundcloud.com/loui_beton https://cfp.cccv.de/media/39c3-chaos-computer-music-club/submissions/TYCDRR/WhatsApp_Imag_03mF0f7.webp Loui Beton https://events.ccc.de/congress/2025/hub/event/detail/loui-beton https://cfp.cccv.de/39c3-chaos-computer-music-club/talk/TYCDRR/ true 2025-12-28T20:00:00+01:00 20:00 02:30 Vorglühmarkt 39c3-zweite-sahne-olga-rhythmus en DJ-Set DJ Set A DJ duo from Frankfurt playing technoid Dark Disco. Soundcloud: https://on.soundcloud.com/ieVMVNI9qlqR6BNBHh https://cfp.cccv.de/media/39c3-chaos-computer-music-club/submissions/QDDQKT/IMG_7866_8rH2vUN.jpeg Tesa https://events.ccc.de/congress/2025/hub/event/detail/zweite-sahne-olga-rhythmus https://cfp.cccv.de/39c3-chaos-computer-music-club/talk/QDDQKT/ true 2025-12-28T10:30:00+01:00 10:30 00:25 SoS Stage H 39c3-trans-treff de, en other Meetup for trans and non binary peoples. There is no agenda, just a chance to meetup other people and maybe Blahajs :3 Varia (Sie/Dey/En) https://events.ccc.de/congress/2025/hub/event/detail/trans-treff true 2025-12-28T11:00:00+01:00 11:00 00:50 SoS Stage H 39c3-vortrag-und-erfahrungsaustausch-zu-kommunalem-klim de other Wichtige Themen für kommunalen Klimagerechtigkeitsaktivismus sind unter anderem Wärmewende, Klimabildung und -kommunikation, Mobilitätswende und Energiewende. Doch wie bekommen wir diese Themen adressiert? In dieser Session sollen verschiedene Aktionsformen, Lehren und Werkzeuge vorgestellt und diskutiert werden. Das beinhaltet: - Bewertung der eigenen Kommune bei [Stadt.Land.Klima!](https://www.stadt-land-klima.de/) - Demonstrationen - Dialoge mit der Stadtverwaltung - Informationsfreiheitsanfragen - Offene Briefe an den Stadtrat - Kreative Kommunikationsformen - Mitarbeit in städtischen Beiräten - Pressemitteilungen - Selbstorganisierte Klimakonferenzen - Veröffentlichung von komplexen Dokumenten/Plänen/Stellungnahmen - Verwaltungsklagen - ... Siehe auch: [Vernetzung kommunaler Klimagerechtigkeitsgruppen](https://events.ccc.de/congress/2025/hub/en/project/detail/so/vernetzung-kommunaler-klimagerechtigkeitsgruppen) moritzl https://events.ccc.de/congress/2025/hub/event/detail/vortrag-und-erfahrungsaustausch-zu-kommunalem-klim true 2025-12-28T12:00:00+01:00 12:00 00:25 SoS Stage H 39c3-von-der-wascheklammer-bis-zur-modell-kuppelklemme- de other How does a detachable cable car actually work? I've been fascinated by these mechanical giants for a long time and have been working on implementing this technology as a working model. I've brought along the first prototypes to show you! In this short talk, I'd like to show you what's needed to clamp onto a cable and how to develop such a detachable clamp. Required prior knowledge: What a clothespin is timmod https://events.ccc.de/congress/2025/hub/event/detail/von-der-wascheklammer-bis-zur-modell-kuppelklemme- true 2025-12-28T12:30:00+01:00 12:30 00:25 SoS Stage H 39c3-build-your-own-joustmania de, en other At several Chaos events, you can often spot a cheerful group of people playing the game “Joustmania” ( https://github.com/adangert/JoustMania ). In this game, each player holds a PlayStation Move controller that tracks the player’s movement. As soon as a controller accelerates too quickly, the player is eliminated from the game. The competitors therefore try to defeat each other by bumping or nudging the other players’ controllers, forcing them to move too fast. This year, I decided to rebuild the game myself and ran into quite a few obstacles along the way: from sourcing the hardware, to setting up a Raspberry Pi (the game is already about 10 years old), all the way to compiling Bluetooth drivers. In the end, this even resulted in my own fork of the project: https://github.com/VanFanelia/joustmania-remastered In this session, I would like to share what I’ve learned, answer your questions about the game or rebuilding it, and/or organize a few rounds of play. VanFanel https://events.ccc.de/congress/2025/hub/event/detail/build-your-own-joustmania true 2025-12-28T13:00:00+01:00 13:00 00:50 SoS Stage H 39c3-digitale-infrastruktur-fur-videos-und-podcasts de, en other “[Who's speaking?](https://media.ccc.de/v/gpn23-213-lanzmining-wer-spricht-denn-da-),” asked arrrrrmin at GPN23. But finding out who speaks how often on talk shows, etc., takes weeks. But why has no one structured this flood of videos and podcasts yet? Especially now that AI slop is permeating all media, it's becoming increasingly difficult to figure out what's behind what you're hearing. If you, like arrrrrmin, are looking for answers, the WissKomm Wiki is for you. The project has been in planning since 2021 and will officially launch in 2026 to make videos and podcasts more accessible and understandable for everyone in many workshops like this one. If you want to know more about videos and podcasts, check out the [video at C3PB](https://c3pb.de/blog/vorstellung-der-idee-des-wisskomm-wikis.html), take a look at the [project website](https://borgnetzwerk.org/wisskomm-wiki-2026), but most importantly: Come to the 39C3 talk :) We look forward to seeing you! _The talk will be followed by a [workshop](https://events.ccc.de/congress/2025/hub/de/event/detail/digitale-infrastruktur-fur-videos-und-podcasts-wis) the next day, where we can discuss all questions and ideas in detail ;)_ TimBorgNetzWerk https://events.ccc.de/congress/2025/hub/event/detail/digitale-infrastruktur-fur-videos-und-podcasts true 2025-12-28T15:30:00+01:00 15:30 01:20 SoS Stage H 39c3-bio-hacking-science en other The "Bio - Hacking - Science" assembly is a space for people interested in the intersection of biological science, computation, art, and their profound ethical and political implications. We are a community of bio nerds, scientists, hackers and artists dedicated to bridging the worlds of biology, hardware, and hacker culture. Our group serves as a welcoming hub for newcomers, amateurs, and experts alike to hang out, exchange knowledge, and discuss current and future biotechnologies and their impact on society. Fpiras https://events.ccc.de/congress/2025/hub/event/detail/bio-hacking-science true 2025-12-28T17:00:00+01:00 17:00 00:50 SoS Stage H 39c3-yes-even-you-can-harden-your-systemd-services en other systemd offers lots of low-effort features for hardening services, but they're only slowly gaining adoption even though they are relatively simple to use. I'd like to introduce the essential options for hardening a systemd service, taking into account some interesting possibilities that arise when at least parts of the system are completely immutable, such as on NixOS. whoami (she/they) https://events.ccc.de/congress/2025/hub/event/detail/yes-even-you-can-harden-your-systemd-services true 2025-12-28T18:00:00+01:00 18:00 00:25 SoS Stage H 39c3-we-show-quadball-brooms-a-snitch-six-round-goals-a en, de other Quadball combines the best of rugby, handball, and dodgeball -- let's talk about that! It looks like this -> [https://chaos.social/@saxnot/115754026830564736](https://chaos.social/@saxnot/115754026830564736) Again we will present Quadball (Muggle Quidditch) at congress! Very small intro to the sport rules followed by casual Q&A. Quadball champions gender diversity with its gender rule: "A team may not have more than three players who identify as the same gender in play at the same time" giving an edge to nonbinary players. Jendrik and saxnot play in the Braunschweiger Broomicorns, one of the leading german quadball teams. Find a quadball league near you! <https://dqbsport.de/> jendrik (any) https://events.ccc.de/congress/2025/hub/event/detail/we-show-quadball-brooms-a-snitch-six-round-goals-a true 2025-12-28T18:30:00+01:00 18:30 00:50 SoS Stage H 39c3-wondrous-mathematics-how-does-artificial-intellige other Conventional computer algorithms are superior to the human intellect in many regards: for instance at multiplying large numbers or winning at chess by analyzing huge numbers of moves. But there are also many tasks which come naturally to us yet exceed the capabilities of algorithms by vast amounts: Rigid algorithms can't decipher human handwriting or drive cars. The recent breakthroughs in artificial intelligence circumvent these barriers by employing quite a different approach: They use artificial neural networks, which are inspired by the partially-understood way the human brain works. The unique feature of artificial neural nets is that they aren't rigid, but can learn. Human programmers specify their rough structure and supply training data, but don't write a single line of code governing their behavior. **In the spirit of a good Unix command-line tool, this talk aspires to explain one thing and explain it well: How do artificial neural nets accomplish the feat of learning?** We'll learn that the answer is related to a mathematical breakthrough made at the end of the 17th century and discuss why deep learning only surged in the last few years, even though the basics of artificial neural nets were already understood in the 1980s. We'll also touch upon some of the greatest problems of neural nets, which emerge directly from the way neural nets learn. The talk doesn't require any advanced knowledge of mathematics. If you're already familiar with Michael Nielsen's book, then don't expect to learn anything new and come to this talk only if you want to contribute interesting remarks. The talk has the goal of making the other neural network talks more accessible. **[Transcript](https://chaos.quasicoherent.io/)** IngoBlechschmidt https://events.ccc.de/congress/2025/hub/event/detail/wondrous-mathematics-how-does-artificial-intellige true 2025-12-28T19:30:00+01:00 19:30 00:25 SoS Stage H 39c3-einfuhrung-in-waldbesetzungen-vorstellung-der-wald de, en other Waldbesetzungen entstehen dort, wo Wälder trotz sich verschärfender Klimakrise weiter abgeholzt werden. Sie sind eine direkte Form, sich der Zerstörung der Profitgier des Kapitalismus in den Weg zu stellen. Gleichzeitig sind sie Utopieschmieden, an denen Menschen aus unterschiedlichen Kontexten zusammenkommen, um zu erproben, wie eine solidarische, klimagerechte Zukunft aussehen könnte. Im Altdorfer Wald (bei Ravensburg) leben wir seit Februar 2021. Wir kämpfen gegen die Zerstörung und Ausbeutung des Bodens durch einen örtlichen Kiesbaron. Der Kiesabbau ermöglicht das Bauen mit klimaschädlichem Beton und das Versiegeln von immer mehr Naturflächen. Weitere Infos: Instagram: @baumbesetzung.ravensburg alti-bleibt.de 🧮 Samuel_77 https://events.ccc.de/congress/2025/hub/event/detail/einfuhrung-in-waldbesetzungen-vorstellung-der-wald true 2025-12-28T20:00:00+01:00 20:00 00:50 SoS Stage H 39c3-c3gsm-ask-us-anything-about-the-39c3-cellular-netw en other We like to tell you how the 39c3's cellular network was created and is operated. Including the current tech stack and what changed over the last years. afterwards there will be a big Q&A session. bibor lynxis lazus takuto (he/him) https://events.ccc.de/congress/2025/hub/event/detail/c3gsm-ask-us-anything-about-the-39c3-cellular-netw true 2025-12-28T21:00:00+01:00 21:00 00:50 SoS Stage H 39c3-speedcoding-javascript en other You will be given a series of algorithmic challenges that you have to solve in a certain amount of time. Whether you are an experienced developer or a beginner, this is a great opportunity to expand your knowledge 💡 To participate, you should bring a device with you, ideally a laptop, so that you can solve the challenges. There is a short tutorial to help you prepare: https://hackmd.io/2zLdA8eOT9-GifslGQZSvw?view Birdy1976 https://events.ccc.de/congress/2025/hub/event/detail/speedcoding-javascript true 2025-12-28T22:00:00+01:00 22:00 00:25 SoS Stage H 39c3-teilchendetektor-im-keller-ich-habs-gemacht-die-th de other Myonen-Detektion mit einer Funkenkammer. Wie funktioniert das eigentlich? Myonen sind Teilchen, die Elektronen sehr ähnlich sind, nur deutlich schwerer. Sie entstehen in der kosmischen Hintergrundstrahlung und treffen ständig auf die Erde. Eine praktische Eigenschaft dieser Teilchen ist, dass sie beim Durchqueren von Materie, Moleküle ionisieren. Auf ihrem Weg hinterlassen sie also Spuren aus freien Elektronen. In einer Funkenkammer macht man sich genau diesen Effekt zunutze: Zwischen zwei Elektroden liegt ein starkes elektrisches Feld an. Wenn ein vorbeifliegendes Myon ein Gas ionisiert, werden die frei gewordenen Elektronen im Feld beschleunigt und lösen einen sichtbaren Funken aus. So wird die unsichtbare Spur des Myons kurzzeitig sichtbar. Wie kann man wissen, ob das detektierte Teilchen ein Myon ist? Welche technischen Herausforderungen gibt es? Wie nützlich ist eine Funkenkammer heutzutage noch? Inwiefern gibt es Überschneidungen mit Teilchendetektoren am DESY oder CERN? Das alles versuche ich zu beantworten. Beim 38c3 habe ich bereits einen Vortrag mit dem Titel „Einführung in die Teilchenphysik“ gehalten. Seitdem habe ich viel dazugelernt und freue mich darauf, dieses Wissen mit euch zu teilen, mit euch in den Austausch zu gehen und euch auf meinem Weg zur angehenden Teilchenphysikerin mitzunehmen. Der Vortrag ist für alle Lebewesen gedacht. Egal ob ihr Vorwissen mitbringt oder nicht. Ich freue mich auf euer Kommen! roso https://events.ccc.de/congress/2025/hub/event/detail/teilchendetektor-im-keller-ich-habs-gemacht-die-th true 2025-12-28T23:00:00+01:00 23:00 01:20 SoS Stage H 39c3-pwn-basics-hacking-web-applications-for-beginners en other UPDATE: You can download the workshop slides here: https://janosch-braukmann.de/wordpress/wp-content/uploads/2025/12/39C3_Pwn_Basics.pdf This is a beginners' workshop on web application security. No prerequisites in web application security are required. A certain (web application) development background is beneficial. First, we will be playing a virtual escape the room game with challenges on a web application to get into an attacker's mindset. Then follows a quick introduction to the OWASP Top 10 vulnerabilities (2025 Release Candidate). Finally use the gathered knowledge to attack a vulnerable web application (https://github.com/Phylu/vulnerable-click-game) and see how these attacks can easily be prevented. Please bring your (fully charged) laptop to be able to participate. Dr. Affe https://events.ccc.de/congress/2025/hub/event/detail/pwn-basics-hacking-web-applications-for-beginners true 2025-12-29T00:30:00+01:00 00:30 00:50 SoS Stage H 39c3-fafo-how-we-stopped-worrying-and-bought-an-electro en other We went on Kleinanzeigen and started a non-profit semiconductor lab. We created a space to do the kind of research we've always wanted, but couldn't do at our local hackerspaces - either due to space constraints, or lack of structures allowing for a safe operation of a proper lab. https://events.ccc.de/congress/2025/hub/event/detail/fafo-how-we-stopped-worrying-and-bought-an-electro true 2025-12-29T01:30:00+01:00 01:30 01:20 SoS Stage H 39c3-how-to-antifascist-protest-rave-demo de, en other We are staging a LARP (live action role play). What can you expect? No rubber swords or black blocs. Instead: camping, anti-fascism, raves, protests and music. Plus: cabaret, theatre, fun, improvised dialogue and scripted interventions. We play together and invite you to dance along. All under the theme: Demonstrations are necessary, but we have to change them. Would you like to contribute to the lecture performance? Here is a pad link: https://pads.ccc.de/c39c3-demo-larp Translated with DeepL.com (free version) jstc (He / Him) loufo Tomate_aka_Radikale_Liebe https://events.ccc.de/congress/2025/hub/event/detail/how-to-antifascist-protest-rave-demo true 2025-12-28T10:30:00+01:00 10:30 01:20 SoS Lecture E 39c3-a-primer-on-llm-security en, de other ## Post-Session Material Thank you for participating! :) The slides are available here: [Slides (PDF) via Slideshare](https://de.slideshare.net/secret/1UNWblpgKTSoSR) You are welcome to get in touch, either here (until Day 4) or via the contact information in the slides. ## Session Large Language Models (LLMs) have taken the world by storm. Alongside their vast potential, these models also present unique security challenges. This session will serve as a primer on LLM security and secure LLMOps, introducing key issues and concepts related to the security of LLMs and systems relying on them. For example, we will be looking at issues such as prompt injection, sensitive information disclosure, and issues related to the interaction of LLMs with the “outside world” (e.g., plugins or APIs, RAG, Agentic AI). Of course, we are also going to briefly look at how to red-team LLMs. This session is based on previous iterations of “A Primer on LLM Security” at Congress and, based on audience feedback, has been extended and developed further. This session is based on previous iterations of “A Primer on LLM Security” at Congress and, based on audience feedback, has been extended and developed further. ## Target Audience and Required Previous Knowledge This session targets beginners and does not assume (in-depth) knowledge about LLMs. If you have prior experience in LLM security and anticipate insights into the latest developments, this session most likely is not for you. Please note that this session will not be about using LLMs in offensive or defensive cybersecurity. ## Learning Objectives From a learning perspective, after the session, participants will be able to … * describe what LLMs are and how they fundamentally function. * describe LLMOps and outline fundamental principles of secure LLMOps. * describe common security issues related to LLMs and systems relying on LLMs. * describe what LLM red teaming is. * perform some basic attacks against LLMs to test them for common issues. ## About Me My Name is Ingo, and I am currently responsible for Digital Education and Educational Technology at the University of Cologne. Relevant to this session, I have a background in computational linguistics and have been working with LLMs for quite some time – also prior to the ChatGPT moment. I am also involved in developing and providing AI infrastructure at scale. Of course, all of this is embedded within a deep interest in cyber- and information security. ## Format The session will be split into a 45-minute talk as well as 15 minutes of discussion. Participants will be provided with the slides as well as some resources for further study. ## Technical Requirements As this will not be a highly hands-on session, there are no technical requirements. If you want to experiment with some of the topics, a device capable of accessing and/or running LLMs is necessary. If you want to “go deeper,” you will need a device – e.g., a laptop, capable of running LLMs locally. ## Material After the session, I will provide all materials, including some selected additional resources. All materials will also be provided via this page. [Slides (PDF) via Slideshare](https://de.slideshare.net/secret/1UNWblpgKTSoSR) Ps. This is a slightly updated version of the workshop(s) I gave at previous iterations of Congress. IngoKleiber (er/sein) https://events.ccc.de/congress/2025/hub/event/detail/a-primer-on-llm-security true 2025-12-28T12:00:00+01:00 12:00 00:50 SoS Lecture E 39c3-teamtype-multiplayer-mode-for-your-text-editor en other We've been working on Teamtype (previously known as Ethersync) for two years now: It connects directories on different computers together, and keeps them in sync. And if you open a file in your text editor, you can edit it together, and see each other's cursors. This enables a new form of smooth real-time collaboration. You can use it for pair programming or note-taking, for example, all from the comfort of your own editor! It feels a bit like the missing real-time complement to Git. Teamtype follows local-first principles, and uses encrypted peer-to-peer connections (you don't need a server or an account). You can also work on entire projects, not just single files. At 39C3, it's time for a live demo! Let me show you how Teamtype works and what you can do with it! We're maintaining plugins for Neovim and VS Code/Codium; others are working on plugins for Jetbrains IDEs, have integrated it into TeXstudio, or are building a web editor for it! I can also show you some more experimental features like a Hedgedoc bridge, or writing commit messages together. We'd be excited for more collaboration on collaboration, so let me show you how to get involved! In the final part of this session, you can install & try Teamtype for yourself in a frantic massively-multiplayer editing experiment! :D - Source code: <https://github.com/teamtype/teamtype> - Documentation: <https://teamtype.github.io/teamtype/> - Mastodon: <https://fosstodon.org/@teamtype> blinry https://events.ccc.de/congress/2025/hub/event/detail/teamtype-multiplayer-mode-for-your-text-editor true 2025-12-28T13:00:00+01:00 13:00 00:25 SoS Lecture E 39c3-elektronische-patientenakte-13-fragen-ob-die-epa-e de other Wir stellen 13 Fragen dazu, ob die elektronische Patienenakte (ePA) in der vorliegenden Form eine gute Idee ist. Außerdem zeigen wir Möglichkeiten zum Widerspruch gegen die ePA: Man kann bei der Assembly von Freedom not Fear einen Widerspruch erstellen und gleich abschicken. Q&A findet an der Assembly von Freedom not Fear statt, Uhrzeiten werden noch bekanntgegeben. Stefan_Streit https://events.ccc.de/congress/2025/hub/event/detail/elektronische-patientenakte-13-fragen-ob-die-epa-e true 2025-12-28T13:30:00+01:00 13:30 00:50 SoS Lecture E 39c3-fusion-geht-besser-andere-hot-fusion-technologien- en other Fusion is always 30 years in the future because government projects are too big, too expensive, and too slow. It doesn't have to be this way. There are better approaches than the three known research directions. There are better fusion fuels that don't cause radioactive contamination. Fusion has even been achieved by school classes and private individuals. A proof that it is possible with much less effort. If we invested as much money in proton-boron fusion as we do in deuterium-tritium, we would probably have power plants in 15 years. Dense Plasma Focus is suitable for decentralized 10-MW power plants. Inertial Electrostatic Confinement for neighborhood power plants with 100 MW. This is not about cold fusion. It's about fusing atomic nuclei with high energy (hot) to gain even more energy. But in different physical configurations. Unfortunately, the media ignores these other hot fusion approaches. This is an info dump on the state of the art: what fusion fuels exist, how you build your own fusion reactor, why hot plasma is physically unfavorable, why some people want to strip-mine the moon, and why other fusion projects that must make do with 100 times less money still achieve similar performance. These projects don't appear in the mainstream press. But they will soon overtake ITER. If we want to achieve the energy transition, then policymakers must stop investing in supposedly safe large-scale technology. It could be much faster and cheaper and the new energy grid could be decentralized. Wolfspelz https://events.ccc.de/congress/2025/hub/event/detail/fusion-geht-besser-andere-hot-fusion-technologien- true 2025-12-28T14:30:00+01:00 14:30 01:20 SoS Lecture E 39c3-privacy-ultras-meetup en other If you're trying to raise your privacy / OPSEC in the real and digital worlds to a maximum, this is for you. This is a round-table skill sharing session about practical privacy. Let's discuss our threat levels (what we're trying to protect against) and share our approaches to preserving our privacy. Topics may include how to avoid unique identifiers like your legal or birth name, phone numbers, email addresses, physical (postal) addresses, device identifiers like browser cookies, IP addresses, MAC addresses, anonymous/multiple SIM cards or virtual phone numbers, and all kinds of fingerprinting techniques. I will bring a list of topics/threats and we'll discuss our solutions to them. I'm asking to share your tricks, which may include using fake names, P.O. boxes and parcel lockers, actively avoiding cameras, using anonymous phone numbers / SIM cards, VPNs, browser extensions, sandboxing techniques, self hosting, and whatever else. Of course I'll bring my knowledge on this topic as well. The session will not be recorded. Please do not take any photos. jomo https://events.ccc.de/congress/2025/hub/event/detail/privacy-ultras-meetup true 2025-12-28T16:00:00+01:00 16:00 01:20 SoS Lecture E 39c3-openwrt-meetup en, de other Once again this year, the developers and users attending the congress want to discuss current OpenWrt topics. Slides: https://docs.google.com/presentation/d/e/2PACX-1vT-p3V616mPtoPuN6OnqFHTRsuaBbl7egMFKLD4hoQ3KOpEqjsR__tnDw4QPcmsYu_OUGkZs4bRbNW1/pub?start=false&loop=false&delayms=10000 Hauke skorpy (she/her) https://events.ccc.de/congress/2025/hub/event/detail/openwrt-meetup true 2025-12-28T17:30:00+01:00 17:30 00:50 SoS Lecture E 39c3-science-in-science-fiction-die-reale-wissenschaft- de other In Science Fiction gibt es Überlichtgeschwindigkeit, Aliens, Antigravitation, Terraforming, Schutzschilde, Beamen, Railguns, KI, Fusion, Nano, und noch viel mehr. Dieser Vortrag gibt einen Überblick, was die moderne Wissenschaft dazu sagt. Der Stand der Wissenschaft entwickelt sich weiter und das kommt nur langsam in der Science Fiction Literatur und in der Öffentlichkeit an. Was stimmt noch und was hat sich geändert? Was ist wissenschaftlich fundiert, was wäre vielleicht doch möglich und was wird immer erfundene Wissenschaft bleiben. Ein realistischer Blick auf die Technologien von Star Trek und Star Wars. Außerdem ein Blick über den Tellerrand, denn auch in der Vergangenheit wurden ab und zu schon Technologien erfunden, die sich vorher niemand vorstellen konnte. Wolfspelz https://events.ccc.de/congress/2025/hub/event/detail/science-in-science-fiction-die-reale-wissenschaft- true 2025-12-28T18:30:00+01:00 18:30 00:50 SoS Lecture E 39c3-tech-from-below de other [tech from below](https://techfrombelow.de/) is a Berlin-based meetup that brings together tech-savvy activists and activist developers to discuss tech tools for social movements. In this special edition, we’ll introduce ourselves and hear from three projects that use technology in their political work. * **[Klasse & Methode – IT Collective Stuttgart](https://klasse-methode.it/)** will present the community calendar software [Lauti](https://lauti.org/) * **[https://esc-it.org](esc-IT Collective)** creates content for IT security trainings for activists * **[neinzurbezahlkarte.de](https://neinzurbezahlkarte.de/) / [bezahlkarte-stoppen.de](https://bezahlkarte-stoppen.de)**: App for subscription management of payment card vouchers The event will be held in German only. leohnever VonBelow https://events.ccc.de/congress/2025/hub/event/detail/tech-from-below true 2025-12-28T19:30:00+01:00 19:30 00:25 SoS Lecture E 39c3-get-to-know-the-furry-fandom-qa_ytje de, en other Ask your questions and learn about the furry fandom! Maybe you are curious and are interested in becoming a furry yourself? Or you just wonder why there are fluffy creatures at the congress? Then get to know us! autinerd (he/they) https://events.ccc.de/congress/2025/hub/event/detail/get-to-know-the-furry-fandom-qa_ytje true 2025-12-28T20:00:00+01:00 20:00 01:20 SoS Lecture E 39c3-inklusion-and-research-data-management-rdm-mi_rje7 en other Data literacy and digitalisation are crucial topics in today's research institutions, to tackle global challenges like climate change, the dramatic loss of species and the erosion of democracy. Nevertheless, most research data is not digitalised nor back-uped; reproducible & transparent research is often a dream. In Research Data Management, a lot of guidlines exist to face these difficulties: Data Management Plans, FAIR data, ELSA, etc. It seems like there is a strategy and buzzword for every problem. **But what is missing is a discussion, if these strategies are inclusive (for neurodivergent people).** How can we alter them, what is needed for you to apply them? No matter if you are a researcher, who has to apply all those strategies, a Data Steward teaching them, or just interested in the topic: I would love to **discuss** with you about your experiences in digitalisation in research institutions & universities and hear about your experiences to raise awareness in the research data community. About the speaker Sarah Büker: While working as a Data Scientist at the Data Science Center (BMFTR founded Data Nord Project @ University of Bremen) and beeing neurodivergent myself, I have faced a lot of exclusive strategies and would love to change the current situation. sarah31415 https://events.ccc.de/congress/2025/hub/event/detail/inklusion-and-research-data-management-rdm-mi_rje7 true 2025-12-28T21:30:00+01:00 21:30 00:25 SoS Lecture E 39c3-open-source-hearing-technology en other The hearing aid space is antiquated and overpriced and badly in need of a widely available and easy to use open source alternative. 5 manufacturers control 99% of the global market, and have little incentive to innovate or compete on prices, so hearing aids cost thousands of Euros. Everyone we meet has either themselves or through a loved one had a bad experience with hearing aids, or experienced quality of life issues with hearing loss. We've been working on making an alternative with our knowledge of professional audio technology, which has long outpaced the medical hearing aid realm. We want to both share the journey, and learn about your experiences both with the technology and hearing itself. A73X drquaithe https://events.ccc.de/congress/2025/hub/event/detail/open-source-hearing-technology true 2025-12-28T22:00:00+01:00 22:00 01:20 SoS Lecture E 39c3-roleplay-night de, en other A place for your TTRPG session. The whole night! Fantasy to sci-fi, cosy to thrilling, rules light to rules heavy. It doesn't matter if you already played or will try it for the first time, this is the place to do it. There will be limited materials (pens, paper). Please bring your own to ensure everyone can have some. More information on https://c3rp.koehr.ing/ Luna https://events.ccc.de/congress/2025/hub/event/detail/roleplay-night true 2025-12-28T23:30:00+01:00 23:30 01:20 SoS Lecture E 39c3-roleplay-night-2-because-80min-is-not-enough en, de other A place for your TTRPG session. The whole night! Fantasy to sci-fi, cosy to thrilling, rules light to rules heavy. It doesn't matter if you already played or will try it for the first time, this is the place to do it. There will be limited materials (pens, paper). Please bring your own to ensure everyone can have some. More information on https://c3rp.koehr.ing/ koehr https://events.ccc.de/congress/2025/hub/event/detail/roleplay-night-2-because-80min-is-not-enough true 2025-12-29T01:00:00+01:00 01:00 01:20 SoS Lecture E 39c3-roleplay-night-3-because-160min-is-not-enough en, de other A place for your TTRPG session. The whole night! Fantasy to sci-fi, cosy to thrilling, rules light to rules heavy. It doesn't matter if you already played or will try it for the first time, this is the place to do it. There will be limited materials (pens, paper). Please bring your own to ensure everyone can have some. More information on https://c3rp.koehr.ing/ koehr https://events.ccc.de/congress/2025/hub/event/detail/roleplay-night-3-because-160min-is-not-enough true 2025-12-28T10:30:00+01:00 10:30 00:25 SoS Workshop D 39c3-search-engine-creators-meetup en, de other Meeting of creatures who have already tinkered with search engines, for getting to know each other and exchanging knowledge. If you are interested in search engines, but have no prior knowledge [Search engines for the Curious](https://events.ccc.de/congress/2025/hub/en/event/detail/search-engines-for-the-curious) on day 3 is the even t for you. Bring * problems where you are curious how others solved them * solutions others may be interested in * Lots of curiousness * some time to chat and listen If you are curious about how search engines work but haven't worked on one yet you might be interested in the session "Search Engines for the Curious" which is aimed to be accessible to newcomers. Exact location are still to be announced. Note: SoS Workshop D is way too large, I'd be happy to free up the reservation in exchange for a small location (maybe ~20 people) (and maybe a 50min slot) slatian (they/them) https://events.ccc.de/congress/2025/hub/event/detail/search-engine-creators-meetup true 2025-12-28T11:00:00+01:00 11:00 03:00 SoS Workshop D 39c3-rust-programming-language-an-absolute-beginner-wor en, de other **A heartfelt welcome!** We will hold a Rust workshop for beginners. We will start with an introduction in the form of a lecture of about 45 minutes. This will be followed by a period of about 120 minutes (including a break), during which you are going to work through exercises independently and at your own pace. We will help with any questions. We — and you — will be supported by the automated Rustlings course. Other experienced Rust developers will be on hand to help all participants directly with questions during the workshop. Don't hold back: You are very welcome to ask questions during the workshop! **You will need:** - A laptop, prepared as described below, so we can get started right away. **Preparation** - Follow the instructions at **<https://rustlings.rust-lang.org/>** for the installation of Rust itself, as well as the interactive Rustlings course. - Also note the instructions for the editor and terminal. The integration with [**rust-analyzer**](https://rust-analyzer.github.io/) will make your Rust experience much more enjoyable! **Verify that your setup works ahead of time!** If you would like to receive help setting this up or verifying that your setup works well (especially if you use Windows), please come by our friendly Rust assembly or contact me directly. **Power supply** The workshop rooms at the venue are not well prepared for work with many laptops: unfortunately, there will not be any power sockets at the tables! - Please bring your laptop fully charged. - If you can, then bring a long cable and multi-sockets, so you can provide yourself and others with electricity. **See you at the workshop — great to have you!** Leonie ([**@calisti@chaos.social**](https://chaos.social/@calisti)) calisti https://events.ccc.de/congress/2025/hub/event/detail/rust-programming-language-an-absolute-beginner-wor true 2025-12-28T18:15:00+01:00 18:15 01:00 SoS Workshop D 39c3-lingo-coordination-2 other Coordination Meeting of Lingo angels https://events.ccc.de/congress/2025/hub/event/detail/lingo-coordination-2 true 2025-12-28T21:30:00+01:00 21:30 01:20 SoS Workshop D 39c3-102-kinkygeeks-ropelabs-bondage-workshop-building- en other KinkyGeeks and RopeLabs join forces to host a follow up Beginner Bondage Workshop. Instructors [@DoodleMe](https://events.ccc.de/congress/2025/hub/user/DoodleMe) and [@KnottyLola](https://events.ccc.de/congress/2025/hub/user/KnottyLola) explore next steps in Japanese rope bondage. 18+ lab-mode workshop. Bring rope and a blanket if you have them. Attendance at the beginner class helps but is not required. This workshop expands on theory and knots from the beginner class and moves at a faster pace. We will briefly recap key skills such as single and double column ties, then progress from there. This session suits those with some rope experience or those who attended the introductory workshop. You do not need to have taken Part I, but you should be comfortable with basic rope handling. The workshop runs in lab mode. It is fully clothed, non-sexual, and open to participants aged 18 and over only. Singles, pairs, and groups are welcome. Space is limited by the room size. Please bring your own non-stretch rope if you have it, plus a blanket or cushion for sitting on the floor. Avoid loose clothing where possible. The workshop will be taught in English. Places are limited by room size. You will need a ticket per person. Get your free ticket here: [https://ticket.kinkygeeks.de/kinkygeeks/102-1/](https://ticket.kinkygeeks.de/kinkygeeks/102-1/) Pez (he/they) https://events.ccc.de/congress/2025/hub/event/detail/102-kinkygeeks-ropelabs-bondage-workshop-building- true 2025-12-28T23:00:00+01:00 23:00 01:20 SoS Workshop D 39c3-betreutes-hacken-broken-access-control de, en other (Workshop will be primarily in German and the introduction will be in German. However, most of the interaction will happen between you, your computer and maybe the person(s) next to you, so non-German-speaker should also be able to participate. I will walk around and can answer questions in English.) In this interactive workshop, you will hunt for widespread vulnerabilities from the popular category “Broken Access Control.” In a specially designed cyber range, you will be challenged to detect and exploit security gaps and understand the dangers posed by inadequately secured access points. Afterwards, we will work together to develop solutions that will help you avoid such vulnerabilities in the future and ensure the security of your applications. Target group: Developers (at least hobbyists) with no particular connection to IT security. Technical requirements: You have used websites before. You can read simple code. Technical requirements: Laptop with internet access (shared with another person if necessary). Firefox(!)-Browser (no Chrome, no Safari, no Edge). Translated with DeepL.com (free version) DerHorst https://events.ccc.de/congress/2025/hub/event/detail/betreutes-hacken-broken-access-control true 2025-12-29T00:30:00+01:00 00:30 00:50 SoS Workshop D 39c3-malware-analysis-and-binary-triage de, en other Malware Analysis and Binary Triage hands-on workshop/meetup. Since the time at the congress is short a bit preparation can help you to speed up getting started and will improve your overall experience. Please bring a laptop with reasonable specs, ideally with: * VirtualBox * a Windows VM with disabled MS Defender * installed Flare-VM (https[:]//github[.]com/mandiant/flare-vm) * installed IDA-Free (https[:]//hex-rays[.]com/ida-free), Ghidra and cutter (https[:]//cutter[.]re/) Make sure to create a first snapshot, before and after installing the FlareVM toolset. No prerequisites are required - everyone is welcome from complete beginners to those with some experience. We also have a discord channel for this event: https[:]//discord[.]gg/QXkEM5G2 fxb deadrabbit pcbre https://events.ccc.de/congress/2025/hub/event/detail/malware-analysis-and-binary-triage true 2025-12-29T01:30:00+01:00 01:30 01:20 SoS Workshop D 39c3-cybersecurity-marchen-xxl-neues-und-altes-aus-nerd de other Cybersecurity Märchen XXL – New and Old Stories from Nerdistan This session ist held in german I’m mitBen, and with over 25 years of experience as a Cybersecurity expert, I invite you to a very special journey into the world of digital security – in an exclusive XXL Night Session. In this extended session, I will read fairy tales from last year and perhaps even some that didn’t make it into the daytime session. We’ll experience familiar tales like The Seven Little Goats and Puss in Boots in a new light, while also diving even deeper into the secrets of cybersecurity. The XXL Night Session will take place in an abandoned room, providing the perfect atmosphere for a deeper journey through Nerdistan. This session is your chance to immerse yourself more intensively into the world of cybersecurity. With a relaxed yet thrilling vibe, it’s designed for all the night owls out there. The day session the day before can be found here: https://events.ccc.de/congress/2025/hub/de/event/detail/cybersecurity-marchen-neues-aus-nerdistan mitBen (He,him,he-man) https://events.ccc.de/congress/2025/hub/event/detail/cybersecurity-marchen-xxl-neues-und-altes-aus-nerd true 2025-12-29T03:00:00+01:00 03:00 07:00 SoS Workshop D 39c3-congress-penpaper-night de other Eine weitere Verlängerung der Congress-P&P-Night. Anderer Raum als die anderen, was dran liegt, dass wir ursprünglich als zwei Menschen unabhängig voneinander eine P&P-Night angemeldet haben und das dann gemerkt und zusammen gelegt haben. Und Raum und Zeit lässt sich nicht trivial ändern, weil dieses Jahr Nacht-Sessions nur noch von der Orga angelegt werden können. Egal, wird schon, Nachts ist ja eigentlich überall genug Platz. Mehr Infos hier: https://events.ccc.de/congress/2025/hub/backoffice/self-organized/sessions/b57e7df8-1d24-458c-91a8-fcd7b281e4db/ Luna https://events.ccc.de/congress/2025/hub/event/detail/congress-penpaper-night true 2025-12-28T14:00:00+01:00 14:00 02:00 SoS Workshop D 39c3-haecksen-picknick-fur-noch-nicht-haecksen_gyr8 de, en other Haecksen-Picknick für künftige Haecksen mit Beitrittsmöglichkeit We welcome all interested FLINTA (women, lesbians, inter, non-binary, trans, agender) who want to learn more about the Haecksen to this picnic. We are looking forward to all individuals, regardless of whether they have an IT background or come from a completely different field of interest. You are also welcome to use this picnic as an opportunity to join the Haecksen and meet like-minded creatures near you. If you are already a Haeckse, please attend the [traditional Haecksen picnic](https://events.ccc.de/congress/2025/hub/en/event/detail/haecksen-picknick-fur-alt-haecksen_i0dn) on Day 3 at 3 p.m. instead to get to know more Haecksen. Note: Due to the high level of interest in 37C3 and 38C3, this event will also take place outside of the Haecksen Assembly this year. Deanna (keins/none-they/them) https://events.ccc.de/congress/2025/hub/event/detail/haecksen-picknick-fur-noch-nicht-haecksen_gyr8 true 2025-12-28T16:00:00+01:00 16:00 01:55 SoS Workshop D 39c3-austausch-mental-health-und-suizidpravention-im-ch de, en other Austausch zum Thema suizidale Krisen, Mental Health und nachhaltige Unterstützung. Gemeinsam Erfahrungen teilen, Ressourcen bündeln und konkrete Schritte für ein sichereres Miteinander erarbeiten. // A meetup to talk about mental health, suicide prevention and sustainable support: sharing experiences, gathering resources, and developing practical steps for safer community care. Protocol & next steps: https://the-spectrum.space/en/mh/ CN: Suicide / Mental Health Depression is widespread—and within the Chaos community, the number of entities struggling with depression and suicidal thoughts is alarmingly high. The painful suicides of the past year, particularly within the trans community, have clearly shown us: We urgently need better structures for mental health and crisis intervention, as well as practical advice for the community on how to support one another. In this session, we want to take action. We will gather initial ideas and approaches: How can we effectively support beings with suicidal thoughts? How do we protect ourselves from burnout? What good resources do we already know and can share with each other? Which ressources are still missing? Together, we will exchange ideas in small groups for a safer, more supportive environment. We will share these results at the end of the session and make them available to the wider community afterwards. A meetup initiated by CCCHH, The Spectrum, Safe the Dance & F.U.C.K. sjaelv (she/they) https://events.ccc.de/congress/2025/hub/event/detail/austausch-mental-health-und-suizidpravention-im-ch true 2025-12-28T19:30:00+01:00 19:30 02:00 SoS Workshop D 39c3-3-congress-skatturnier-auf-dem-39c3 de, en other Erste Serie des 3. Congress Skatturnier auf dem 39C3. First series of the 3rd Congress Tournament at 39C3. This is the first series of the [3rd Congress Skat Tournament at 39C3](https://0x1b.de/39c3Skat/Skatturnier.html). Non-binding registration takes place at [Nuudel](https://nuudel.digitalcourage.de/xe7sI6LzCfXXXEUm). The first 48 registrants are guaranteed a spot, after which a waiting list will be created. segal https://events.ccc.de/congress/2025/hub/event/detail/3-congress-skatturnier-auf-dem-39c3 true 2025-12-28T11:30:00+01:00 11:30 00:25 SoS Saal 6 39c3-dickmaulrussler de other Von Jura-Studis über Rechtsanwältinnen und Rechtsanwälten bis zu Jura-Profs sind alle Jurist:innen i.w.S. eingeladen, sich gegenseitig in lockerer Runde kennenzulernen und zu vernetzen. Die verfügbaren Räume auf dem Congress sind knapp. Daher haben wir im SOS 6 nur 25 Minuten. Es wird vorgeschlagenen, ab 12 Uhr für weitere Gespräche in die Nähe des c3Späti weiterzuziehen (genauer Treffpunkt: Bottle Drop Point 73 am Geländer, direkt gegenüber der Chaos Post, in Blickweite des c3Späti). Der einladende Dickmaulrüssler ist Rechtsanwalt in Hamburg. DECT: 8018 Dickmaulrussler https://events.ccc.de/congress/2025/hub/event/detail/dickmaulrussler true 2025-12-28T12:00:00+01:00 12:00 00:50 SoS Saal 6 39c3-maennlichkeit-rg de other Egal welchen Geschlechts - männliche Sozialisation hat auch heute noch starke Auswirkungen auf unser Leben, Lieben und Zusammensein. Wir wollen gemeinsam auf Männlichkeit blicken; verstehen, wie sie entsteht, wirkt, erhalten wird und nach einem anderen Umgang mit ihr suchen. mation155 (she/her) quin (they/them) https://events.ccc.de/congress/2025/hub/event/detail/maennlichkeit-rg true 2025-12-28T13:00:00+01:00 13:00 01:55 SoS Saal 6 39c3-heaven-2 other https://events.ccc.de/congress/2025/hub/event/detail/heaven-2 true 2025-12-28T15:00:00+01:00 15:00 00:50 SoS Saal 6 39c3-queerit-gathering de other We would like to invite all queer individuals interested in queer digital infrastructure ("it by us for us as queers") to meet with us and build a collective/community. Whether you develop software solutions, design IT infrastructure, or are simply looking for technical solutions that are suitable for us as queers and that we can trust—you are very welcome 💖! Even if you just want to meet other queer people at the Congress, feel free to come by. 🏳️‍🌈🏳️‍⚧️ “We” are the loose collective [queerit.org](https://queerit.org), the [Digital Empowerment Project by Local IT](https://digitalempowermentproject.de/) together with the ["queersupport" of the youth network Lambda](https://queersupport.de). Let's build on what we already discussed as QueerIT at the Chaos Feminist Convention (you can see what that was [here](https://queerit.org/queer-it-auf-der-chaos-feminist-convention/)) and form alliances. We look forward to seeing you! 🏳️‍🌈🏳️‍⚧️ lambdaqueer https://events.ccc.de/congress/2025/hub/event/detail/queerit-gathering true 2025-12-28T16:00:00+01:00 16:00 01:20 SoS Saal 6 39c3-asd de, en other Hi 39c3, The Chaos Communication Choir is back! After a three-year break, this time we’ve got a new piece about a special bus called Adenauer, plus the classic Heaven can’t wait, which started it all back in 2017. You can find sheet music and practice tracks here: https://www.ccchoir.de For more info on the choir’s history and what we’ve been up to, check this out: https://fairybotorchestra.bandcamp.com On Day 3 at 9:00 PM at Späti, everyone is invited to join in and sing—at the Punk Karaoke Special with the band Der Untergang*! thiesmynther https://events.ccc.de/congress/2025/hub/event/detail/asd true 2025-12-28T17:30:00+01:00 17:30 00:25 SoS Saal 6 39c3-what-the-guix en other Hey you! Psst, are you a developer or an IT person? Do you use multiple computers with many packages and move between them back and forth? I feel your pain and may have some remedy for it. You don't have to sell your soul to get out of dependency hell, BTW ;-) I will show you how to embrace the Functional Programming Model even at the operating system level! Eelco Dolstra explored these ideas in his PhD thesis in 2006, also introducing NixOS. Today we focus on GNU Guix, inspired by NixOS Ludovic Courtès started this lispy project in 2012. NaN (he/him) https://events.ccc.de/congress/2025/hub/event/detail/what-the-guix true 2025-12-28T18:15:00+01:00 18:15 01:00 SoS Saal 6 39c3-video-mixer-2 other Scheduling Meeting for Video Mixer Angels https://events.ccc.de/congress/2025/hub/event/detail/video-mixer-2 true 2025-12-28T19:30:00+01:00 19:30 00:25 SoS Saal 6 39c3-plushie-verse-meetup de, en other Location and time can still be subject of change :3 NcamGnrvngu (they/them) https://events.ccc.de/congress/2025/hub/event/detail/plushie-verse-meetup true 2025-12-28T20:00:00+01:00 20:00 00:25 SoS Saal 6 39c3-wir-grunden-eine-chaos-wg-als-solidarisches-selbst de other Eingeladen sind alle Interessierten die keine Lust mehr auf immer höhere Mieten für immer schlechteren Wohnraum haben und den Traum von einem bewohnten Hackspace/Makespace verwirklichen möchten. Voraussetzungen: Keine. Vorkenntnisse über das Modell des Mietshäusersyndikats (syndikat.org) sind aber von Vorteil. yellni [DECT 2297] yellni https://events.ccc.de/congress/2025/hub/event/detail/wir-grunden-eine-chaos-wg-als-solidarisches-selbst true 2025-12-28T20:30:00+01:00 20:30 00:55 SoS Saal 6 39c3-cpu-entwicklung-in-factorio-wie-benutze-ich-phds-f de other Dies ist die Hands-on-Session zum Talk "CPU-Entwicklung in Factorio: Vom D-Flip-Flop bis zum eigenen Betriebssystem" Am besten schaut ihr euch vorher den Talk an, dort wird das Projekt ausführlich vorgestellt. Dies ist die Hands-on-Session zum Talk "CPU-Entwicklung in Factorio: Vom D-Flip-Flop bis zum eigenen Betriebssystem" (https://events.ccc.de/congress/2025/hub/en/event/detail/cpu-entwicklung-in-factorio-vom-d-flip-flop-bis-zum-eigenen-betriebssystem). In dieser Session zeige ich, wie man meine CPU in Factorio lädt, wie man Assembly-Programme dafür schreibt, sie assembliert und schließlich in Factorio ausführt. Zum Mitmachen solltet ihr **Factorio** bereits installiert haben (Grundspiel, nicht die Erweiterung *Space Age*). Getestet habe ich Factorio über Steam auf Windows und Ubuntu (mit Proton 10.0; Guide für Linux-Installation von Steam-Games: https://ubuntu.com/blog/linux-gaming-with-ubuntu-desktop-steam-and-proton). Ohne Factorio könnt ihr eure Assembly-Programme nur auf einem Python-Simulator ausführen. *(Factorio ist übrigens generell ein sehr gutes Spiel, das ich uneingeschränkt empfehlen kann …)* Für den Assembler benötigt ihr eine Python-Umgebung und müsst ein GitHub-Repository clonen. Für die Bedienung in Factorio empfehle ich außerdem eine Maus, auch wenn sie nicht zwingend notwendig ist. Im Detail werden wir: - Den Factorio-Worldsave meiner CPU in Factorio öffnen - Alle benötigten Quality-of-Life-Mods installieren - Die vorinstallierten Programme auf der CPU testen - Das Assembler-Repository clonen und den Python-Assembler einrichten - RISC-V-Assembly kennenlernen - Ein erstes kleines Programm schreiben - Das Programm assemblieren - Den Blueprint in Factorio laden - Das eigene Programm in Factorio ausführen! Ich freue mich sehr über Anregungen und Fragen. Wenn beispielsweise jemand Interesse hätte, für diese CPU einen Compiler zu bauen, wäre ich ganz Ohr! :) PhD (he/him) https://events.ccc.de/congress/2025/hub/event/detail/cpu-entwicklung-in-factorio-wie-benutze-ich-phds-f true 2025-12-28T21:30:00+01:00 21:30 00:50 SoS Saal 6 39c3-cybersecurity-marchen-neues-aus-nerdistan de other The reading will be held in German. I’m mitBen, and for over 25 years, I’ve been working as a Cybersecurity expert to make the world a safer place. As a speaker, I’m here today to take you on a journey where classic fairy tales like The Seven Little Goats and Puss in Boots are brought into the digital realm. In "Cybersecurity Märchen – Neues aus Nerdistan", I’ll teach you the fundamentals of IT security in a fun and nerdy way – all without the dry theory. Imagine this: the seven little goats need to protect themselves from a hacking wolf. Puss in Boots becomes a cybersecurity pro and shows us how he defends his system with clever tricks. In these and many other stories, I’ll take you on an adventure where you’ll learn important security lessons – all wrapped up in fairy tales you’ve never heard before. With my 25 years of experience in cybersecurity and as an experienced speaker, I will provide you with everything you need to know about digital security. It’s not just about making complex topics understandable – it’s about getting you excited for the digital world, with a pinch of humor and fantasy. I’m also working on organizing an XXL Night Session, where we can dive even deeper into the mysteries of cybersecurity. In this special extended session, you’ll get even more fairy tales, plenty of stories from last year, and expanded insights into the world of digital security – guaranteed to be thrilling and educational. Missed the session or want to have more cyber. Find the XXL session: https://events.ccc.de/congress/2025/hub/de/event/detail/cybersecurity-marchen-xxl-neues-und-altes-aus-nerd mitBen (He,him,he-man) https://events.ccc.de/congress/2025/hub/event/detail/cybersecurity-marchen-neues-aus-nerdistan true 2025-12-28T22:30:00+01:00 22:30 01:20 SoS Saal 6 39c3-hello-qubitty-your-first-steps-on-a-quantum-comput en other In this workshop, we will program a gate-based quantum computer provided by IBM. After a short introduction to quantum physics (only the stuff we need for programming), we’ll jump right in: We will program three small examples on IBM’s freely accessible Quantum platform, illustrating both the limitations and the potential of quantum computers. The workshop is suitable for absolute beginners — no prior knowledge of any programming language is required. After the workshop, you will have a solid understanding of how such a machine works - and whether we really need to start worrying about Q-Day already. Please bring your laptop. You can sign up for IBM Quantum in advance (https://quantum.cloud.ibm.com/), but it’s also possible to participate without an account using the quantum simulator. greenygreenfarmer https://events.ccc.de/congress/2025/hub/event/detail/hello-qubitty-your-first-steps-on-a-quantum-comput true 2025-12-29T00:00:00+01:00 00:00 00:25 SoS Saal 6 39c3-wtf-nochmal-das-ganze-ii de other The system of harassing payment cards for people receiving asylum seeker benefits is not a new idea, but has been dusted off from the 1990s/2000s. But even back then, there was resistance—including in Thuringia! We are showing “Change?! – No way!”, a 25-minute documentary by Filmpirat*innen about the voucher system for refugees. Using hidden cameras, the film pirates in Thuringia accompanied refugees while shopping to show the everyday, discriminatory madness at supermarket checkouts when vouchers have to be “used up” during a shopping trip or dictionaries “can't be bought with vouchers.” But they also show the everyday solidarity of people who exchange vouchers 1:1 for cash in exchange initiatives and do not stop there, but generally demand the abolition of the voucher practice – the precursor to today's payment cards. neinzurbezahlkarte https://events.ccc.de/congress/2025/hub/event/detail/wtf-nochmal-das-ganze-ii true 2025-12-29T00:30:00+01:00 00:30 01:20 SoS Saal 6 39c3-qubes-os-meetup en, de other We are a group of Qubes OS users who meet monthly in Berlin. At 39c3 we would like to meet other Qubes OS enthusiasts and discuss everything Qubes OS related! Some topics for the meeting could be: - 2025 in Qubes :D - Qubes OS 4.3 - Introducing Qubes OS: A beginner’s perspective and a hands-on experience - Whatever you would like to share and discuss! All creatures welcome <3 qubedmaiska https://events.ccc.de/congress/2025/hub/event/detail/qubes-os-meetup true 2025-12-28T11:30:00+01:00 11:30 00:25 Komonin 39c3-den-solidarischen-gutscheintausch-mit-unterstutzun de, en other The initiative “No to Payment Cards Leipzig” organizes the solidarity-based voucher exchange with the help of the open source app Couponexpress. The app is freely available on codeberg.org and comes with instructions for use. The app is only used within the group to manage an ordering system for vouchers. With the help of the app, voucher orders from solidarity buyers can be matched with the vouchers actually available after an exchange, and the distribution to be made can be calculated. Without the app, the now large number of vouchers to be distributed would no longer be manageable, and it would not be possible to help so many people obtain more cash to circumvent the discriminatory payment card system. In the SoS, the app is presented by people from the Leipzig initiative and its use is explained. neinzurbezahlkarte https://events.ccc.de/congress/2025/hub/event/detail/den-solidarischen-gutscheintausch-mit-unterstutzun false 2025-12-28T13:00:00+01:00 13:00 00:50 Komonin 39c3-nextcloud-activist-hostingsupport-meetup de, en other We want to exchange with others who support activists with Nextcloud. Come around if you provide Nextcloud hosting for activists and left-wing movements, or if you support them with tech counselling. https://events.ccc.de/congress/2025/hub/event/detail/nextcloud-activist-hostingsupport-meetup false 2025-12-28T16:00:00+01:00 16:00 00:25 Komonin 39c3-om-resonanz-dein-15-minuten-power-cycle-atem-hack- de, en other Target Audience: Overstimulated brains, conference survivors, and anyone needing 15 minutes of instant clarity. Format: Guided Micro-Practice (max. 15 minutes, no talking, just doing). Detail: The C3 is an intense sensory overload. This session provides a fast, scientifically grounded reset. We use sound resonance (the 'Om') not for esoteric purposes, but as a focused breathing tool for immediate activation of the parasympathetic nervous system. Learn how to calm your vagus nerve in under 10 minutes to restore mental clarity and focus. No spiritual content, no prerequisites—just pure pragmatism. kurisu https://events.ccc.de/congress/2025/hub/event/detail/om-resonanz-dein-15-minuten-power-cycle-atem-hack- false 2025-12-28T18:00:00+01:00 18:00 00:50 Komonin 39c3-nach-der-revolte-ein-reisebericht-zu-uberwachung-u de other Während wir uns auf dem 37C3 noch begeistert Aktionsstrategien der Hongkonger Demokratiebewegung abgeguckt haben, sind mittlerweile eine halbe Million HongkongerInnen ausgewandert, geflohen, oder im Knast. Seit dem Niederschlagen des Aufstands und der Installation des Nationalen Sicherheitsgesetzes hört man aus der Stadt nicht mehr viel. Wer ist da noch? Wie weit ist ein chinesischer Überwachungsstaat installiert? Und wie gehen Menschen mit der neuen Wirklichkeit um? Um diese Fragen zu beantworten, bin ich für ein halbes Jahr nach Hongkong gezogen. Das Buch „nach der Revolte“ (Alibri Verlag, Februar 2026) bietet Einblicke in die politische Gegenwart vor Ort, durch Gespräche mit HongkongerInnen, dem Nachzeichnen der technopolitischen Veränderungen der letzten Jahre, und dem Beschreiben von Alltag in einer Stadt, die so tut, als sei gar nichts passiert. Das Ganze ergibt ein Bild – von Resilienz und Ohnmacht, und von der Fragilität von Systemen, in denen schon ein, zwei Updates reichen, um eine Gesellschaft gänzlich zu ändern. „Im Film La Haine wird die Geschichte eines Mannes erzählt, der aus dem 50. Stock fällt und sich dabei immer wieder sagt: Bis hierher lief’s noch ganz gut. Das sind wir, wenn wir denken, dass unsere Gesellschaftsordnung grundsätzlich eine ist, die unsere politischen Freiheiten hält. Das Gegenteil ist der Fall. Nichts an dieser Ordnung schützt sie, außer die temporäre, arrogante Blindheit vor dem eigenen Aufprall.“ penny https://events.ccc.de/congress/2025/hub/event/detail/nach-der-revolte-ein-reisebericht-zu-uberwachung-u false 2025-12-28T19:00:00+01:00 19:00 00:50 Komonin 39c3-rayhunter-orcas-hunt-stingrays-community-meetup en, de other Rayhunter is a new open source tool from the EFF to detect cellular spying. You install Rayhunter on a LTE pocket router to detect suspicious activity from IMSI catchers (aka. Stingray) in your vicinity. In this session we want to install Rayhunter, talk about what it does and why it is useful, what possible use cases are and how future development might look like. Everyone is welcome, no special knowledge or skills are needed. If you can please bring along the following items * your laptop (Linux, MacOS, Windows) * a (fully charged) TP-Link M7350 portable LTE router (some other models are also supported by Rayhunter, but this is the one I tested) * a Micro-SD card (32 GB is ok) * a SIM card (e.g. a prepaid SIM from your local supermarket - you may want to activate it but it is not strictly needed, nano-SIM form factor needed) * a USB-C cable that can connect to your laptop * installer files for your OS version You can find the TP-Link M7350 used on eBay or new on Amazon for ~45 EUR https://amzn.eu/d/6YUbV1b https://www.tp-link.com/de/home-networking/mifi/m7350/ For background information: https://www.eff.org/deeplinks/2025/03/meet-rayhunter-new-open-source-tool-eff-detect-cellular-spying GitHub repository and release files: https://github.com/EFForg/rayhunter European community around TP-Link M7350: https://github.com/m0veax/tplink_m7350 Please note that this is not an "official" EFF event. beeblebroxx https://events.ccc.de/congress/2025/hub/event/detail/rayhunter-orcas-hunt-stingrays-community-meetup false 2025-12-28T20:00:00+01:00 20:00 00:50 Komonin 39c3-lote-deinen-eigenen-euclidean-sequencer de, en other The Euclidean Sequencer is a hardware gadget developed by students from Cologne. It uses the Euclidean algorithm to find the greatest common divisor of two numbers, thereby creating a sequence. The sequence can be modified using two potentiometers and can be connected to another sequencer or external devices, such as speakers. Just drop by without registering and bring high-power USB-C power supply, if you have that with you, or even your own soldering iron. The recommended price for the workshop is €30. carinalntz https://events.ccc.de/congress/2025/hub/event/detail/lote-deinen-eigenen-euclidean-sequencer false 2025-12-28T21:00:00+01:00 21:00 01:55 Komonin 39c3-bildungsurlaub-20-burokratie-hacken de other In mehreren Bundesländern wurden Anträge auf Anerkennung von Bildungsurlaub abgelehnt. Die formalen Ablehnungen landen zwar bei einzelnen – die Konsequenz betrifft jedoch alle: Arbeitnehmende aus diesen Bundesländern können für entsprechende Veranstaltungen keinen Bildungsurlaub einreichen. In dieser Self-organized Session wollen wir genau hier ansetzen und gemeinsam: - Ablehnungsgründe sammeln und systematisch analysieren - typische Argumentationsmuster der Behörden identifizieren - überlegen, wie man diese Hürden konstruktiv und kreativ „hacken“ kann - Ansätze entwickeln, um Inhalte, Struktur oder Sprache so anzupassen, dass Anerkennung künftig wahrscheinlicher wird Ziel ist kein Frustabbau, sondern kollektives Problemlösen: Erfahrungen bündeln, Wissen teilen und konkrete Ideen entwickeln, wie wir Bildungsurlaub auch unter schwierigen Rahmenbedingungen möglich machen. Die Session ist offen gestaltet – bringt gern Ideen, Perspektiven oder einfach Neugier mit. Dante https://events.ccc.de/congress/2025/hub/event/detail/bildungsurlaub-20-burokratie-hacken false 2025-12-28T23:00:00+01:00 23:00 00:50 Komonin 39c3-knoten-workshop11 de, en other Für alle die Knoten für alles Mögliche lernen möchten. Samuel_77 https://events.ccc.de/congress/2025/hub/event/detail/knoten-workshop11 false 2025-12-29T00:30:00+01:00 00:30 00:50 Komonin 39c3-stickmaschinen-inkstitch-meetup de, en other We want to get together, talk about our experiences with Ink/Stitch and machine embroidery, show off projects and network. There is no agenda, we'll just sit down together and see what we feel like talking about. Ink/Stitch is a plugin for Inkscape that can be used to design embroidery patterns for machine embroidery. Here is the pad we created, feel free to take a look and contact me here on the hub: https://hedgedoc.c3d2.de/r_NgjtxrSdiOSzkKG7g_TA?view# becca https://events.ccc.de/congress/2025/hub/event/detail/stickmaschinen-inkstitch-meetup false 2025-12-28T12:00:00+01:00 12:00 01:00 Komonin 39c3-letter-writing-to-prisoners de other Der 19. April 2023 war für die anarchistische und antiautoritäre Bewegung ein schwerer Schlag. Drei Aktivist\*innen wurden an der Front in der Ukraine in einem Hinterhalt getötet: Dmitri Petrow aus Russland, Finbar Cafferkey aus Irland und Cooper Andrews aus den USA. Am 9. September wäre Dimas Geburtstag und zu diesem Anlass haben wir die Broschüre „Dmitry Petrow“, die 2023 von CrimethInc veröffentlicht wurde, ins Deutsche übersetzt, um weitere Texte ergänzt und aktualisiert. In seinem letzten Brief schrieb Cooper, dass der Krieg vermutlich nicht so schnell vorbei sein wird, und er behielt recht. Die Hoffnung auf ein baldiges Ende ist verschwunden. Die Folgen des Krieges, wenn er doch irgendwann zu Ende sein wird, die physische und psychische Zerstörung der ukrainischen Gesellschaft im Allgemeinen und der anarchistischen Bewegung im Besonderen sind unvorstellbar. Wir möchten mit euch gemeinsam an die erinnern, die nicht mehr mit uns sind. Wir werden bei dieser Veranstaltung aus dem Buch lesen, Spenden für unsere Genoss\*innen sammeln und mit euch ins Gespräch kommen. Wir wollen die Stimmen von Dima, Finbar und Cooper hörbar machen, die eine schwerwiegende Wahl getroffen und dafür einen hohen Preis gezahlt haben. Was haben sie uns zu sagen? Was bedeutet das für uns? Und welche Schlüsse ziehen wir daraus? https://events.ccc.de/congress/2025/hub/event/detail/letter-writing-to-prisoners false 2025-12-28T14:00:00+01:00 14:00 01:00 Komonin 39c3-komona-we-can-make-it-work-plenary_cl5i en, de other Let's meet and discuss everything what's necessary, and everything what's not. https://events.ccc.de/congress/2025/hub/event/detail/komona-we-can-make-it-work-plenary_cl5i false 2025-12-28T15:00:00+01:00 15:00 01:00 Komonin 39c3-vectoralism-the-economic-system-of-the-21st-centur en other https://events.ccc.de/congress/2025/hub/event/detail/vectoralism-the-economic-system-of-the-21st-centur false 2025-12-28T16:30:00+01:00 16:30 01:30 Komonin 39c3-awareness-networking-meeting-to-excange-for-people en, de other https://events.ccc.de/congress/2025/hub/event/detail/awareness-networking-meeting-to-excange-for-people false 2025-12-28T11:00:00+01:00 11:00 01:30 Sendezentrum Bühne (Saal X 07) 39c3-elixir-name-badge-workshop de Workshop Bühne (lang) Kleiner Workshop für die Empfänger des Goatmire/Nerves-Name Badge Prototypen. Tim Pritlove https://events.ccc.de/congress/2025/hub/event/detail/elixir-name-badge-workshop https://pretalx.c3voc.de/39c3-sendezentrum/talk/HC9NH7/ https://pretalx.c3voc.de/39c3-sendezentrum/talk/HC9NH7/feedback/ true 2025-12-28T12:30:00+01:00 12:30 00:45 Sendezentrum Bühne (Saal X 07) 39c3-netzpolitikorg-offon-off-the-record-live de Live-Podcast Bühne Bei "Off The Record" nehmen wir euch mit in den Maschinenraum von netzpolitik.org. Einmal im Monat geben Redakteur:innen und andere Team-Mitglieder Einblicke in ihre Arbeit. Bei dieser Live-Ausgabe zum Abschluss des Jahres wollen wir hinter die Kulissen einiger große Recherchen blicken: Es geht um Spionage-Apps und Datenhändler, eine mysteriöse Schallwaffe und die Tücken der Verwaltungsdigitalisierung. In "Off/On", dem Podcast von netzpolitik.org, wechseln sich zwei Formate ab: Bei "Off The Record" geht es ab in den Maschinenraum von netzpolitik.org: Wir erzählen, wie unsere Recherchen entstehen, und machen transparent, wie wir arbeiten. Bei "On The Record" interviewen wir Menschen, die unsere digitale Gesellschaft prägen. Bei dieser Live-Ausgabe von "Off The Record" spricht Ingo Dachwitz mit Chris Köver, Markus Reuter und Esther Mehnhard über ihre Recherchen des Jahres. Wie sind sie bei der Recherche vorgegangen? Welche Hindernisse mussten sie überwinden? Wie verpackt man komplexe Sachverhalten am besten? Und was haben die Recherchen ausgelöst? Ingo Dachwitz Esther Menhard Markus Reuter Chris Köver https://events.ccc.de/congress/2025/hub/event/detail/netzpolitikorg-offon-off-the-record-live https://pretalx.c3voc.de/39c3-sendezentrum/talk/89TKXV/ https://pretalx.c3voc.de/39c3-sendezentrum/talk/89TKXV/feedback/ false 2025-12-28T13:30:00+01:00 13:30 00:45 Sendezentrum Bühne (Saal X 07) 39c3-they-talk-tech-live-mit-anne-roth de Live-Podcast Bühne „They Talk Tech“ Live: Podcasts-Hosts Svea Eckert und Eva Wolfangel diskutieren mit Anne Roth, Referentin für Digitalpolitik der Linksfraktion, Netzaktivistin, scharfe Beobachterin und präzise Analytikerin digitaler Machtstrukturen, über Überwachung, digitale Freiheitsrechte, feministische Netzpolitik und die politischen Kämpfe hinter der Technologie. Anne Roth beschäftigt sich seit vielen Jahren mit staatlichen Sicherheitsarchitekturen, Geheimdienstkontrolle, digitaler Gewalt und Fragen politischer Teilhabe. Im Gespräch geht es um die Mechanismen digitaler Macht, um Freiheitsrechte im Zeitalter permanenter Datenerfassung und darum, wie politische Entscheidungen technologische Entwicklungen prägen und umgekehrt - und wo die netzpolitische Community auch in politisch schwierigen Zeiten ansetzen kann, um die Entwicklung positiv zu beeinflussen. Eine offene, präzise und lebendige Diskussion, die sowohl technisch interessierte als auch politisch denkende Menschen abholt. Live und mit Raum für eure Fragen. "They Talk Tech" ist ein c't-Podcast von Svea Eckert und Eva Wolfangel https://pretalx.c3voc.de/media/39c3-sendezentrum/submissions/8TU7KS/Bild_They_Talk_Tech_LFsVlqQ.jpg Eva Wolfangel https://events.ccc.de/congress/2025/hub/event/detail/they-talk-tech-live-mit-anne-roth https://pretalx.c3voc.de/39c3-sendezentrum/talk/8TU7KS/ https://pretalx.c3voc.de/39c3-sendezentrum/talk/8TU7KS/feedback/ false 2025-12-28T14:45:00+01:00 14:45 00:45 Sendezentrum Bühne (Saal X 07) 39c3-och-menno-mode-power-cycles-power-suit-dresscodes-wtf de Live-Podcast Bühne Der inkompetente Podcast über Dresscodes und Mode. Warum verschiedene Kleiderordnungen immer mal wieder zu komischen Situationen und politischen Missverständnissen gesorgt haben. Warum ist der Business Dress eigentlich nur ein besserer Hausanzug ? Warum wird aus gemütlicher Kleidung eine Kleidung die bei Staatsempfängen getragen wird. Warum ist ein Dresscode immer missverständlich ? Bitte zum Vortrag in smart Casual Business white Tie, aber nicht zu formal erscheinen. Wer das versteht oder auch nicht wird sich wohlfühlen. Eine kleine Reise über die merkwürdige Welt der (Männer) Mode, die halt wenig sinnvoll ist. Mode ist halt nur eine Möglichkeit sich von anderen Abzugrenzen. Sven Uckermann https://events.ccc.de/congress/2025/hub/event/detail/och-menno-mode-power-cycles-power-suit-dresscodes-wtf https://pretalx.c3voc.de/39c3-sendezentrum/talk/HADW9B/ https://pretalx.c3voc.de/39c3-sendezentrum/talk/HADW9B/feedback/ false 2025-12-28T15:40:00+01:00 15:40 00:45 Sendezentrum Bühne (Saal X 07) 39c3-aaa-ask-advi-anything de Workshop Bühne Es gab den Wunsch nach Creator AmA Sessions. Ich würde hiermit eine anbieten. Ich bin aber definitiv remote. ^^ Thomas Brandt https://events.ccc.de/congress/2025/hub/event/detail/aaa-ask-advi-anything https://pretalx.c3voc.de/39c3-sendezentrum/talk/LTEEXQ/ https://pretalx.c3voc.de/39c3-sendezentrum/talk/LTEEXQ/feedback/ false 2025-12-28T16:30:00+01:00 16:30 01:30 Sendezentrum Bühne (Saal X 07) 39c3-comeflywithus de Live-Podcast Bühne (lang) Wir, das sind Steffen und arl , besprechen in unserem Podcast alles was die Große und Kleine Fliegerei angeht. Das CFWU Team besteht I.d.R. aus aktiven Piloten:innen von großen und kleinen Flugzeugen, sehr gut unterstützt durch den sehr erfahrenen Flugzeugtechniker Harry! Update GPS Spoofing ATPL (AirlineTransportPilotLicense) Wie lernt man heute fliegen Wie läuft es bei arl seinem ATPL Flugvorbereitungen Was muss man alles machen Technik AirIndia Beispiel für Schwurbelungen Aufbau der Technik Wie schaltet man ein Triebwerk ein Wie schaltet man ein Triebwerk aus Wie schaltet man es im Notfall aus Feuerlöschsystem Das NOTAM System Was ist es Wann wurde es gebaut Wie hat es sich entwickelt Trotz des vermeintlich ernsten Themas sind wir immer mit Humor dabei! Wenn ihr Fragen zur Sendung oder zum Thema habt, stellt sie gerne – am besten schon vorab. Ihr könnt uns kurz vorher antreffen! https://pretalx.c3voc.de/media/39c3-sendezentrum/submissions/GEU3ER/cover_Kopie_ZSFjb4Q_iPcUYn_fjUrhQQ.webp Steffen Braasch arl https://events.ccc.de/congress/2025/hub/event/detail/comeflywithus https://pretalx.c3voc.de/39c3-sendezentrum/talk/GEU3ER/ https://pretalx.c3voc.de/39c3-sendezentrum/talk/GEU3ER/feedback/ false 2025-12-28T18:45:00+01:00 18:45 01:30 Sendezentrum Bühne (Saal X 07) 39c3-the-freak-show-clubhouse de Live-Podcast Bühne (lang) Die Freak Show und alle Hörerinnen und Hörer machen eine Sendung als Gespräch Im Clubhouse-Style trifft das Freak Show Team auf seine Hörer. Jeder kann mitmachen. Werde zum Freak Show Host für 5 Minuten. Wir diskutieren mit Euch jedes frühere oder künftige Thema und sind uns auch für Hot Takes nicht zu schade. https://pretalx.c3voc.de/media/39c3-sendezentrum/submissions/HLCWZS/freak-show-logo-1400x1400_3AOAynB.jpg Tim Pritlove https://events.ccc.de/congress/2025/hub/event/detail/the-freak-show-clubhouse https://pretalx.c3voc.de/39c3-sendezentrum/talk/HLCWZS/ https://pretalx.c3voc.de/39c3-sendezentrum/talk/HLCWZS/feedback/ false 2025-12-28T20:30:00+01:00 20:30 01:30 Sendezentrum Bühne (Saal X 07) 39c3-passwort-der-heise-security-podcast-live-vom-39c3 de Live-Podcast Bühne (lang) Der heise security Podcast macht wieder einen Betriebsausflug nach Hamburg. Diesmal bringt Christopher seinen Co-Host Sylvester mit und spricht 90 Minuten lang über aktuelle Security-Themen vom Congress. Wir haben uns erneut einige spannende Fundstücke herausgesucht und sprechen darüber miteinander, aber auch mit unseren Gästen. Welche Themen wir besprechen ist - wie immer bei unserem Podcast - eine Überraschung. https://pretalx.c3voc.de/media/39c3-sendezentrum/submissions/ZFSGTG/8b05430c-d1e2-449f-a96d-fa1_w1Fw5PY.png Christopher Kunz Sylvester https://events.ccc.de/congress/2025/hub/event/detail/passwort-der-heise-security-podcast-live-vom-39c3 https://pretalx.c3voc.de/39c3-sendezentrum/talk/ZFSGTG/ https://pretalx.c3voc.de/39c3-sendezentrum/talk/ZFSGTG/feedback/ false 2025-12-28T09:30:00+01:00 09:30 01:15 Stonewall IO (Saal Y 06) 39c3-bastle-ein-haecksen-licht de Workshop Holzspatel, leitfähiges Klebeband, LED, Batterie und Mauly-Klemme - daraus entsteht ein Haecksen-Licht In diesem Workshop können Menschen ein Haecksen-Licht basteln. Der Workshop ist für Kinder ab ca. 4 Jahren geeignet. Es wird geklebt und gemalt und nicht gelötet. Das Haecksen-Licht kann mit verschiedenen Motiven verziert werden. Freies Basteln mit individueller Anleitung, kein Vortrag. Freies Kommen und Gehen im Rahmen der Workshopzeit und nach Platzverfügbarkeit. Der Bau eines Haecksen-Lichts dauert etwas 15-20 Minuten. (Letzter Bastelbeginn also um 10:30) quima https://events.ccc.de/congress/2025/hub/event/detail/bastle-ein-haecksen-licht https://pretalx.c3voc.de/39c3-haecksen-workshops-2025/talk/XKSVRX/ https://pretalx.c3voc.de/39c3-haecksen-workshops-2025/talk/XKSVRX/feedback/ true 2025-12-28T11:15:00+01:00 11:15 01:00 Stonewall IO (Saal Y 06) 39c3-workshop-network-security-darknet en Workshop We all have heard about the darknet - but how to navigate to and through it? How to start with the TOR-Browser? We all heard about vulnerabilities - but how do Hackers use these? ***FLINTA*-only*** This one-hour workshop focuses on the secure and responsible use of offensive security tools. We'll take a practical look at Metasploit, Torify, and related tools to understand how to test attack surfaces while maintaining privacy and anonymity. Together, we'll discuss setting up a small test environment, routing traffic through Tor and proxy chains, and discuss the limits of technical anonymization—including legal and ethical aspects. Objective: You'll learn how to use Metasploit securely in a lab setup, what Torify can do, and where caution is advised. Level: Intermediate (basic knowledge of Linux and networking recommended) Duration: Approx. 1 hour What to bring: Laptop with Linux (VM is acceptable), Metasploit, and Tor tools Clandestine https://events.ccc.de/congress/2025/hub/event/detail/workshop-network-security-darknet https://pretalx.c3voc.de/39c3-haecksen-workshops-2025/talk/DVTJBS/ https://pretalx.c3voc.de/39c3-haecksen-workshops-2025/talk/DVTJBS/feedback/ true 2025-12-28T12:30:00+01:00 12:30 01:00 Stonewall IO (Saal Y 06) 39c3-gegenhalten-vor-ort-flintas-als-kommunalpolitikeri de Workshop Workshop zu rechter Bedrohung und sexistischer Kontrolle in ländlich-ostdeutschen Kommunen. Anhand eigener Erfahrungen werden Machtmechanismen offengelegt und Strategien erarbeitet, die politische Handlungsfähigkeit stärken. Workshop zu politischem Druck von rechts und sexistischen Machtpraktiken in der Kommunalpolitik. Grundlage sind Situationen aus ostdeutsch-ländlichen Kommunen, in denen FLINTA*s bewusst isoliert, geschwächt oder aus politischen Prozessen gedrängt werden. In einem eigens für den Workshop entwickelten Serious Game werden mögliche Reaktionen durchgespielt und unter realistischen Bedingungen bewertet. Die Teilnehmenden müssen entscheiden, welche Schritte tragfähig sind und welche die eigene Position verschlechtern. Ziel ist es die Handlungssicherheit im Umgang mit ausgrenzenden und abwertenden Situationen zu stärken. Der Workshop ist FLINTA-only. Der geschützte Rahmen soll ermöglichen, dass Erfahrungen ausgesprochen, Konflikte klar analysiert und Strategien ohne Beobachtungsdruck entwickelt werden können. „Safe Space“ meint hier die Abwesenheit jener Dynamiken, die in der Praxis Einschüchterung und Selbstzensur erzwingen. Cathleen Hoffmann https://events.ccc.de/congress/2025/hub/event/detail/gegenhalten-vor-ort-flintas-als-kommunalpolitikeri https://pretalx.c3voc.de/39c3-haecksen-workshops-2025/talk/SAUGTF/ https://pretalx.c3voc.de/39c3-haecksen-workshops-2025/talk/SAUGTF/feedback/ true 2025-12-28T13:45:00+01:00 13:45 01:30 Stonewall IO (Saal Y 06) 39c3-git-quellcode-verwalten-fur-anfangerinnen de Workshop long Wir schauen uns gemeinsam an, wie wir mit git den Quellcode von unseren Projekten verwalten können. Wir installieren Git, lernen den Umgang mit Git auf der Kommandozeile kennen und erarbeiten uns dabei relevante Begriffe wie “Commit” und “Repository”. Was ist eigentlich Git und wie kann Git mir helfen, den Überblick über Änderungen an meinem Code zu behalten? Dieser Workshop bietet eine Einführung in die Quellcode-Verwaltung mit Git für absolute Anfänger*innen. Gemeinsam werden wir... - überlegen, wofür wir Git überhaupt brauchen und womit Git uns helfen kann. - Git installieren. - ein "Repository" anlegen. - lernen, was eigentlich alle diese Begriffe wie "Repository" und "Commit" meinen. - Dateien in einem Projekt versionieren. - uns den Änderungsverlauf von einem Projekt anschauen. - verschiedene Versionen einer Datei zusammenführen. **Anmeldung zum Workshop:** Wenn du am Workshop teilnehmen möchtest, registriere dich bitte am Haecksen-Helpdesk. Es gibt insgesamt 30 Plätze. **Material:** Zum Mitmachen bitte einen (idealerweise aufgeladenen) Laptop mit Internetzugang mitbringen. PS: Für die Teilnahme sind keine Programmierkenntnisse erforderlich. Git wird meist für die Verwaltung von Quellcode verwendet, kann aber auch zur Verwaltung anderer Textdateien verwendet werden. PPS: Wir arbeiten mit Git auf der Kommandozeile. Ich versuche dies so zu gestalten, dass auch Kommandozeilen-Neulinge ohne Vorkenntnisse gut mitkommen. **Unterlagen:** Die Slides und das Git-Cheatsheet zum Workshop findet ihr bei diesem Workshop im Programm der Haecksen: https://pretalx.c3voc.de/39c3-haecksen-workshops-2025/talk/GEYDMW/ Anne-Victoria Meyer (sie/ihr) https://events.ccc.de/congress/2025/hub/event/detail/git-quellcode-verwalten-fur-anfangerinnen https://pretalx.c3voc.de/39c3-haecksen-workshops-2025/talk/GEYDMW/ Slides aus dem Workshop Git-Cheatsheet aus dem Workshop https://pretalx.c3voc.de/39c3-haecksen-workshops-2025/talk/GEYDMW/feedback/ true 2025-12-28T15:30:00+01:00 15:30 01:00 Stonewall IO (Saal Y 06) 39c3-antistalkinghaecksenorg de Workshop Vorstellung der Seite https://antistalking.haecksen.org/, eine Seite mit Anleitungen gegen Cyberstalking. Auch Chaostreffs können bei dieser Arbeit unterstützen! Im Anschluss: Beratung in der Haecksen-Assembly. Während der Pandemie entstand die Seite https://antistalking.haecksen.org/ in gemeinschaftlicher Arbeit verschiedener Haecksen. Seitdem sind neue Seiten hinzugekommen und neue Einfallstore wurden entdeckt. Einige Haecksen beraten Klient*innen per E-Mail und schulen Frauenberatungsstellen. Auch Chaostreffs können unsere Arbeit durch Hardwarespenden unterstützen, denn häufig müssen Geräte zur Beweissicherung stillgelegt werden. Es soll aufgezeigt werden, wie die Seite den Beratenden helfen kann und wie man sie anwendet. Im Anschluss werde ich Beratung in der Haecksen-Assembly anbieten, auch für privatere Fragen. Princess https://events.ccc.de/congress/2025/hub/event/detail/antistalkinghaecksenorg https://pretalx.c3voc.de/39c3-haecksen-workshops-2025/talk/D9NEGK/ https://pretalx.c3voc.de/39c3-haecksen-workshops-2025/talk/D9NEGK/feedback/ true 2025-12-28T16:45:00+01:00 16:45 01:00 Stonewall IO (Saal Y 06) 39c3-tech-transcendentalism-as-hypermodern-myth-and-neo en Workshop The tech-libertarian transhumanist narrative is nothing but a hypermodern salvation myth. It is used to propagate a feudalist model of society in which a select few reap all the benefits. We discuss this ideology and how to oppose it. **tl;dr:** A libertarian mindset among tech-affine people often goes together with political ideas that seem to promote freedom and progress, but really stand for a crypto-fascist neufeudalism, and the transhumanist idea that we can and need to take control of human evolution by technological means—in the narrow image of those who promote this view, and to the detriment of diverse people with other world views or ways of life. The inclusion of Joscha Bach's talk at 39C3 and its subsequent cancellation, after his emails with Jeffrey Epstein were made public, has generated much needed discussion about this close connection between **the libertarian right in tech**, the **TESCREAL** bundle of throught schools (transhumanism, extropianism, singularitarianism, cosmism, rationalism, effective altruism, and longtermism) [1], and covertly or overtly misogynist / queer- & transphobic / misanthropic **patriarchal**, **authoritarian**, and **fascist ideologies**. None of this is particularly new. Analysis of these connections stretches back decades. It reveals a shocking amount of supremacism, egotism, and immaturity, a profound lack of responsibility, the celebration of behavior that targets undesired minorities, and political incorrectness under the guise of "free speech," from the very beginnings of the tech industry to the present moment [2,3]. Last year, Bach presented at 38C3, where he reduced the human mind to software, fetishized the mismeasure of human intelligence by IQ, and called for the effective dehumanization of humanity (quote: "we anthropomorphize people way too much") [4]. Recently, another connection has been highlighted: that between **transhumanist narratives** and **religious salvation myths** [5,6,7] and **apocalyptic revelations** [8,9,10]. The basic idea is that our world is about to unravel and our capacities will soon be outclassed by superintelligent machines that—for all practical purposes—take on the role of god(s). For the *accelerationist*, this is a good thing because, with the proper alignment, it will enable us to upload our minds to the cloud, live forever, and thus conquer the galaxy. For the *doomer*, surprisingly, this is not a bad thing either, because humanity is but an intermediate stage—crossing Nietzsche's famous <a href="https://www.goodreads.com/quotes/384722-man-is-a-rope-stretched-between-the-animal-and-the">rope</a>—between the primitive ape descending from the trees and the infallible machines that will inevitably replace us, marking the next step in some sort of strange imagined *<a href="https://en.wikipedia.org/wiki/Great_chain_of_being">Great Chain of Being</a>*. Human extinction, therefore, is to be welcomed. In these **hypermodern apocalypse myths**, God and the devil in the traditional religious narrative have simply been replaced by our future machine overlords. Just take Peter Thiel's invocation of the *antichrist* (nicely contextualized and summarized in [8,9,10]), some sinister force that prevents technological progress from saving humanity and leading us into our glorious future. Or Bach himself who—in an interview on the Jim Rutt Show—outlined an *Aquinean approach to alignment*: all it takes to get along with AGI is love, hope, and faith [11]. The *apotheotic drive* behind all this is not exactly subtle. Such dramatic-sounding (and weirdly spiritual) visions of the future cover up a dark political agenda, sometimes called the **dark enlightenment** [12,13], which is being implemented in their shadow: a totalitarian form of **libertarian neufeudalism** designed to enrich a very small elite of billionaires at the cost of the rest of humanity and the ecological health of our planet. The idea is for the chosen few to survive the coming megacrisis without having to worry about us—the other 98%. This side of transhumanism looks more like a crazed end-time cult than the pan-rationalist utopia it pretends to be in public. This entire view is based on an astonishing amount of hubris. It reveals a lack of empathy and human connection. It is also completely detached from reality, assuming technological capabilities and an individual capacity to survive that are very unlikely to ever come to pass. It is a myth in both senses of the term: a visionary narrative for this epoch of late-stage capitalism, but also a foolish fairy tale with no relevance to what is actually going on. What explains the **appeal** of such a **delusional** and **anti-human ideology**? One reason is widespread *ignorance* when it comes to the true nature of this heterogeneous movement. It does not even try to hide from view but—backed by a spittle-licking tech-media information clique and the idea that "boys will be boys" but that's not too harmful and, anyway, this phase will pass—it manages to cover its tracks quite effectively and to get away with pretty much anything at the moment—even buying itself a Vice President of the U.S. of A. [14]. The second reason is the following: in this time of looming crisis, a lot of us are looking for *positive visions of the future*, for narratives that suggest workable paths our of our current predicament. This is why many otherwise intelligent and tech-savvy folks are surprisingly susceptible to the dangerous and anti-social delusion of the hypermodern myth of technological salvation. We desperately *want* it to be true. **Workshop Format:** (60 min) This workshop consists of a short (10 min) introductory talk by Yogi Jaeger, which summarizes the main theses of his 2023 essay on tech-transcendentalism [7], followed by comments from ElleJay. The main part of the workshop consists of a **moderated deliberative discussion with the audience**. We want to exchange ideas and perspectives, as well as experiences, especially from the standpoints of different minority groups impacted by this ideology. **The aim of our deliberations is to raise awareness of the presence and influence of transhumanist crypto-fascism in the community, and to come up with specific strategies how to oppose this problematic ideology while providing alternative visions for a thriving and diverse humanity in the 21st century.** The time is perfect to raise this important topic at 39C3—not just because of the debate about Bach, but also because it seems to be garnering more and more attention, at least in English-speaking world. **References:** [1] The term TESCREAL was coined by Timnit Gebru and Emile Torres in this article, which explains the history and the different flavors of this ideology-bundle: https://firstmonday.org/ojs/index.php/fm/article/view/13636/11599. [2] Paulina Borsook (2001). Cyberselfish: A Critical Romp through the Terribly Libertarian Culture of High Tech (New York: PublicAffairs). [3] The Nerd Reich Podcast: Gil Duran interviews Paulina Borsook: https://youtu.be/DL-kwZdkiOA. [4] Documented in this Mastodon thread by Aline Blankertz: https://indieweb.social/@alineblankertz/113808990876980594. [5] Meghan O'Gieblyn (2021). God, Human, Animal, Machine: Technology, Metaphor, and the Search for Meaning (New York: Doubleday). Neatly summarized here: https://youtu.be/mgqdSJrutXg. [6] Mary-Jane Rubenstein (2022). Astrotopia: The Dangerous Religion of the Corporate Space Race (Chicago: University of Chicago Press). [7] In this blog from 2023, Jaeger compares tech-transcendentalism to the medieval catholic salvation myth: https://www.johannesjaeger.eu/blog/machine-metaphysics-and-the-cult-of-techno-transcendentalism. [8] The Nerd Reich Podcast: Gil Duran talks to Robert Fuller and Matthew Fox about Peter Thiel's "Antichrist" lectures: https://youtu.be/KegSMO9XcIY. [9] This Guardian article has lots of excerpts from Thiel's "antichrist" lectures: https://www.theguardian.com/us-news/2025/oct/10/peter-thiel-lectures-antichrist. [10] The Nation: "Peter Thiel is the real Antichrist," https://www.thenation.com/podcast/archive/twsu112025. [11] Joscha Bach in one of his three appearances on the Jim Rutt Show: https://www.jimruttshow.com/currents-joscha-bach. [12] Guardian article on Curtis Yarvin (a.k.a. Mencius Moldbug): https://www.theguardian.com/us-news/2024/dec/21/curtis-yarvin-trump. [13] Nick Land's coining of "Dark Englightenment" is described in this essay: https://socialecologies.wordpress.com/2012/10/10/nick-land-on-the-dark-enlightenment. [14] See, for example: https://www.cbsnews.com/news/jd-vance-trump-vp-peter-thiel-billionaire. Johannes Jäger ElleJay (LJ) https://events.ccc.de/congress/2025/hub/event/detail/tech-transcendentalism-as-hypermodern-myth-and-neo https://pretalx.c3voc.de/39c3-haecksen-workshops-2025/talk/QMYK3T/ https://pretalx.c3voc.de/39c3-haecksen-workshops-2025/talk/QMYK3T/feedback/ true 2025-12-28T18:00:00+01:00 18:00 01:00 Stonewall IO (Saal Y 06) 39c3-vereinskrams-bei-den-haecksen de Workshop Interessierte Personen, interessierte Haecksen, Haecksen mit Schwerpunkt #vereinigkeiten sowie der Haecksen-Vorstand finden sich zusammen und sprechen über Prozesse, Abläufe, Wörter und alles was mit der Vereinsarbeit bei den Haecksen zu tun hat. Wir laden euch zu einem entspannten Austausch über die Formalia und Pseudo-Formalia in Vereinen und spezifisch dem Haecksen-Verein ein. Es wird am Anfang eine kurze Einführung geben, danach besprechen wir im Austausch die mitgebrachten Fragen und Anregungen. Der Schwerpunkt wird dabei auf die Projektarbeit bei den Haecksen legen und wie das Werkzeug "Verein" für diese zu benutzen ist. melzai https://events.ccc.de/congress/2025/hub/event/detail/vereinskrams-bei-den-haecksen https://pretalx.c3voc.de/39c3-haecksen-workshops-2025/talk/X3PXLD/ https://pretalx.c3voc.de/39c3-haecksen-workshops-2025/talk/X3PXLD/feedback/ true 2025-12-28T19:15:00+01:00 19:15 01:00 Stonewall IO (Saal Y 06) 39c3-wie-spreche-ich-ihn-an-mit-anderen-mannern-uber-se de Workshop FLINTA kennen meist einige FLINTA, die sexualisierte Gewalt von cis Männern erfahren haben, Cis Männer kennen oft keinen cis Mann, der sexualisierte Gewalt ausgeübt hat. Wie kommt das? Ein Workshop für Männer. Wie können Männer über das Thema ins Gespräch kommen? Wie können Männer andere Männer auf sexistisches und grenzüberschreitendes Verhalten ansprechen? Der Workshop möchte einen Austausch anregen, welche Barrieren es gibt, andere Männer auf problematisches Verhalten anzusprechen, aber auch darüber, wie diese überwunden werden können. Es geht nicht darum, FLINTA ausschließlich als Betroffene anzusehen und cis Männer ausschließlich als Ausübende. Dennoch ist es wichtig, dass (cis) Männer Verantwortung übernehmen und solche Gespräche führen. Als solidarische Praxis, aber auch als Prävention. Im Workshop können Ideen, Erfahrungen und Strategien miteinander geteilt oder zusammen entwickelt werden. Also kommt vorbei, wenn ihr diese Gespräche bereits führt, wenn ihr euch bisher noch nicht getraut habt oder auch, wenn ihr ein so cooles Umfeld habt, dass sie gar nicht nötig sind. Der Workshop richtet sich an Männer. Wir werden dies auch zu Beginn formulieren, aber wir wollen natürlich keine Nachweise. Julian [er/ they] und buecherwurm [sie/ ihr, agender] werden den Workshop begleiten, buecherwurm wird sich auf den methodischen Rahmen fokussieren und vermutlich irgendwann rausziehen. buecherwurm julian https://events.ccc.de/congress/2025/hub/event/detail/wie-spreche-ich-ihn-an-mit-anderen-mannern-uber-se https://pretalx.c3voc.de/39c3-haecksen-workshops-2025/talk/33UMAC/ https://pretalx.c3voc.de/39c3-haecksen-workshops-2025/talk/33UMAC/feedback/ true 2025-12-28T20:30:00+01:00 20:30 01:00 Stonewall IO (Saal Y 06) 39c3-zyklus-hacken-power-to-the-cycles de Workshop Alle Monate wieder bluten einige von uns. Aber das ist nicht alles. Der Menstruationszyklus ist so viel mehr. In diesem Workshop wollen wir erkunden wie wir unsere Hormone und deren Schwankungen besser verstehen können, um sie zu hacken. In diesem Workshop geht es um die Mutter aller Zyklen: den Menstruationszyklus. Wir werden über Chronobiologie, Ernährung, Sport, Schwangerschaft, PMS, PMDD, Migräne, PCOS, Endometriose, Thermometer, Wärmflaschen und den Mond sprechen. Und natürlich den Anfang und das Ende. Der Workshop soll Gelegenheit bieten sich über den Zyklus auszutauschen. Alle mit eigener Menstruationserfahrung sind willkommen. Dazu zählen Erfahrungen mit dem Menstruationszyklus, die in der Vergangenheit liegen, nur sporadisch auftreten oder durch Hormontherapie ausgelöst oder pausiert wurden. Wir möchten in diesem Haecksen-Skillshare versuchen das Thema in seiner ganzen Bandbreite zu besprechen und unterschiedliche Perspektiven zu hören. Alle die systematisch Zyklusdaten erfassen oder erfasst haben und ihre Erkenntnisse daraus teilen möchten, sind herzlich dazu eingeladen. Power to the Cycles! trëma https://events.ccc.de/congress/2025/hub/event/detail/zyklus-hacken-power-to-the-cycles https://pretalx.c3voc.de/39c3-haecksen-workshops-2025/talk/BNRQWP/ https://pretalx.c3voc.de/39c3-haecksen-workshops-2025/talk/BNRQWP/feedback/ true 2025-12-28T22:00:00+01:00 22:00 02:00 Stonewall IO (Saal Y 06) 39c3-flinta-singstar de Evening Event (open end) DE: Offene Singstar-Runde für alle FLINTA-personen. EN: Open Singstar-Session for all FLINTA-people. Every taste of music is welcome! *English below* DE: Offene Singstar-Runde für alle FLINTA-personen. Nach dem vielen lieben Feedback der letzten Jahre, bringen wir unsere Singstar-Session wieder zurück. 4 Mikrophone, Musik für jeden Geschmack und hoffentlich ganz viele von euch! Keine Sorge, wenn genug mitmachen, muss sich niemand selbst hören. ;) Jeder Musikgeschmack ist willkommen! Egal ob du gerne Anime Titelsongs, Metalcore oder Schlager hörst, wir haben für alle was dabei. Ja, natürlich kannst du auch einfach ABBA singen. EN: Open Singstar-Session for all FLINTA-people. After all the lovely feedback from the last years, we are bringing back our Singstar-Session! 4 microphones, music for every taste and hopefully a lot of you! Don't worry, if enough people join, nobody needs to hear themselves. ;) Every taste of music is welcome! No matter if your jam are Anime-Openings, Metalcore or Schlager, we got you covered. Yes of course we also have ABBA. Drakulix https://events.ccc.de/congress/2025/hub/event/detail/flinta-singstar https://pretalx.c3voc.de/39c3-haecksen-workshops-2025/talk/VERP9U/ https://pretalx.c3voc.de/39c3-haecksen-workshops-2025/talk/VERP9U/feedback/ true 2025-12-28T11:00:00+01:00 11:00 03:00 SoS 39c3-rust-programming-language-an-absolute-beginne_vwxn en Workshop long Rust programming language: An absolute beginner workshop with intro presentation. Absolute beginner means “beginner in Rust” just as well as “beginner in programming”. Anyone interested can benefit from the introductory presentation, the exercises and our guidance, regardless of experience. **A heartfelt welcome!** We will hold a Rust workshop for beginners. We will start with an introduction in the form of a lecture of about 45 minutes. This will be followed by a period of about 120 minutes (including a break), during which you are going to work through exercises independently and at your own pace. We will help with any questions. We — and you — will be supported by the automated Rustlings course. Other experienced Rust developers will be on hand to help all participants directly with questions during the workshop. Don't hold back: You are very welcome to ask questions during the workshop! **You will need:** - A laptop, prepared as described below, so we can get started right away. **Preparation** - Follow the instructions at **<https://rustlings.rust-lang.org/>** for the installation of Rust itself, as well as the interactive Rustlings course. - Also note the instructions for the editor and terminal. The integration with [**rust-analyzer**](https://rust-analyzer.github.io/) will make your Rust experience much more enjoyable! **Verify that your setup works ahead of time!** If you would like to receive help setting this up or verifying that your setup works well (especially if you use Windows), please come by our friendly Rust assembly or contact me directly. **Power supply** The workshop rooms at the venue are not well prepared for work with many laptops: unfortunately, there will not be any power sockets at the tables! - Please bring your laptop fully charged. - If you can, then bring a long cable and multi-sockets, so you can provide yourself and others with electricity. **See you at the workshop — great to have you!** Leonie ([**@calisti@chaos.social**](https://chaos.social/@calisti)) calisti https://events.ccc.de/congress/2025/hub/event/detail/rust-programming-language-an-absolute-beginne_vwxn https://pretalx.c3voc.de/39c3-haecksen-workshops-2025/talk/AYTEQX/ https://pretalx.c3voc.de/39c3-haecksen-workshops-2025/talk/AYTEQX/feedback/ false 2025-12-28T14:00:00+01:00 14:00 02:00 SoS 39c3-haecksen-picknick-fur-neue-haecksen de Workshop long Haecksen-Picknick für künftige Haecksen mit Beitrittsmöglichkeit EN: Haecksen picnic with the opportunity to join the Haecksen Wir begrüßen zu diesem Picknick alle interessierten FLINTA (Frauen, Lesben, inter, nicht-binär, trans, agender), die mehr über die Haecksen erfahren wollen (https://haecksen.org/). Wir freuen uns über alle Wesen, egal ob mit IT-Background oder aus einem völlig anderen Bereich. Dieses Picknick könnt ihr gern nutzen, um euch den Haecksen anzuschließen und gleichgesinnte Wesen in eurer Nähe kennenzulernen. Bist du bereits eine Haeckse, dann besuche bitte stattdessen das Haecksen-Picknick an Tag 3 um 15 Uhr, um mehr Haecksen kennen zu lernen. Hinweis: Aufgrund des hohen Interesses am 37C3 und 38C3 findet dieses Angebot auch dieses Jahr außerhalb der Haecksen-Assembly statt. EN: We welcome all interested FLINTA (women, lesbians, inter, non-binary, trans, agender) who want to learn more about the Haecksen to this picnic. We are looking forward to all individuals, regardless of whether they have an IT background or come from a completely different field of interest. You are also welcome to use this picnic as an opportunity to join the Haecksen and meet like-minded creatures near you. If you are already a Haeckse, please attend the Haecksen picnic on Day 3 at 3 p.m. instead to get to know more Haecksen. Note: Due to the high level of interest in 37C3 and 38C3, this event will also take place outside of the Haecksen Assembly this year. https://events.ccc.de/congress/2025/hub/event/detail/haecksen-picknick-fur-neue-haecksen https://pretalx.c3voc.de/39c3-haecksen-workshops-2025/talk/SMQBHC/ https://pretalx.c3voc.de/39c3-haecksen-workshops-2025/talk/SMQBHC/feedback/ false 2025-12-28T17:30:00+01:00 17:30 01:30 Art & Play: Bus Stage 39c3-traumtaucher_5jxf de, en other Der Theatertechniker Elias baut zusammen mit seinen Freunden ein voll funktionsfähiges Steampunk-U-Boot. Während Nico Menschen aus den Wellen des Mittelmeers rettet, rät der 70-jährige Künstler Jim: „Tu es nicht. Repariere keine Autos, sondern mach lieber etwas im Leben, was du wirklich willst.“ Elias fragt sich: Muss man sich zwischen Selbstverwirklichung und selbstlosem Handeln entscheiden? Wovon hängt die Verantwortung gegenüber Einzelpersonen oder der Gesellschaft insgesamt ab? **Artist: Christoph Fleischer** **Genre: Documentary, 92 min** *DE with EN subtitles, 2024* Theatre engineer Elias builds a fully functional steampunk submarine together with his friends. While Nico rescues people from the waves of the Mediterranean, the 70-year-old artist Jim advises: ”Don‘t do it. Don’t fix cars, but rather do something in life that you really want to”. Elias asks himself: Is there a decision to be made between self-realization and selfless-action? Upon what does responsibility towards individuals or larger society depend? ABOUT WATER AND DREAMS is a philosophical journey that questions the meaningfulness of our actions and dares to dream publicly in our dreamless society. Documentary film about the submarine project presented at 37C3 with a lecture. Lecture - “How to build a submarine and survive” by Elias and Nico Picture: Traumtaucher ©Christoph Fleischer [www.traumtaucher-film.de](www.traumtaucher-film.de) [www.tiefenruder.de](www.tiefenruder.de) https://events.ccc.de/congress/2025/hub/https://usercontent.events.ccc.de/congress/2025/hub/usercontent/e/9ca389f11cad/1080-1080-max.jpg Marty https://events.ccc.de/congress/2025/hub/event/detail/traumtaucher_5jxf false 2025-12-28T20:30:00+01:00 20:30 01:00 Art & Play: Bus Stage 39c3-aylin-leclaire-electronic-live-performance other Eingängige Hooks, druckvolle Beats und ein Hauch Science Fiction: Als Produzentin, Songwriterin und interdisziplinäre Künstlerin verwebt Aylin Leclaire schillernde Pop-Melodien mit düster pulsierenden Electro-Texturen. Ihre Stimme gleitet vom sanften Flüstern bis zum strahlenden Höhenflug und trägt Texte, die klare Haltung zeigen, ohne den Ohrwurm aus dem Blick zu verlieren. Catchy hooks, powerful beats, and a touch of science fiction: As a producer, songwriter, and interdisciplinary artist, Aylin Leclaire weaves shimmering pop melodies with dark, pulsating electro textures. Her voice moves effortlessly from soft whispers to radiant soaring highs, carrying lyrics that convey a clear stance without ever losing sight of the earworm. [aylinleclaire.com](https://aylinleclaire.com) https://events.ccc.de/congress/2025/hub/https://usercontent.events.ccc.de/congress/2025/hub/usercontent/e/ea56762edcf1/1667-2500-max.jpg Marty https://events.ccc.de/congress/2025/hub/event/detail/aylin-leclaire-electronic-live-performance false 2025-12-28T23:30:00+01:00 23:30 00:30 Art & Play: Bus Stage 39c3-pony-pracht-nina-bendix-igleses-water-to-voice other „Water to Voice“ ist ein sich ständig weiterentwickelndes Werk, das aus dem Prozess des Klonens von Lisas Stimme entstanden ist. Der Fluss und die Bewegung des Wassers steuern und lösen die Stimme aus und schaffen so ein einzigartiges Zusammenspiel zwischen den beiden Elementen. Es fängt die Stimme mitten in ihrem Trainingsprozess ein – wie sie sich verändert, stolpert und neu interpretiert. Während sich das Wasser bewegt, formt und unterbricht es den Klang und verwandelt die Bewegung der Flüssigkeit in eine stimmliche Geste. Das Ergebnis ist weder rein menschlich noch rein künstlich, sondern etwas dazwischen – lebendig, instabil und sich ständig verändernd. „Water to Voice“ wird zu einem Dialog zwischen Natur und Technologie, einer fragilen Choreografie, in der die Stimme in Echtzeit lernt, ins Stocken gerät und sich weiterentwickelt. »Water to Voice« is an evolving piece born from the process of cloning Lisa’s voice. The flow and movement of water control and trigger the voice, creating a unique interplay between the two elements. It captures the voice in the midst of its training—shifting, stumbling, reinterpreting itself. As the water moves, it shapes and disrupts the sound, transforming liquid motion into vocal gesture. What emerges is neither purely human nor purely artificial, but something in between—alive, unstable, and constantly transforming. »Water to Voice« becomes a dialogue between nature and technology, a fragile choreography in which the voice learns, falters, and evolves in real time. Artist Bio: The duo Lisa L. Zwinzscher & Nina Bendix Igleses (Leipzig/Weimar) explores the boundaries of listening and voice in the digital realm. Emerging from Lisa L. Zwinzscher’s solo project Pony Pracht, which blends music with interactive, game-inspired visuals, her work expands to questions of identity and authenticity in the age of AI. As a singer, she has cloned her own voice, transforming it into a human-artificial live instrument.  Fascinated by the tactile, sonic and metaphorical qualities of water, Nina Bendix Igleses approaches listening as a multisensory practice of relating to the world, investigating interconnection within and between self and environment. Together, they engage with questions of identity, resonance, and transformation, creating sonic environments that explore what it means to be human. [ponypracht.com](https://ponypracht.com) [ninabendixigleses.com](https://ninabendixigleses.com) https://events.ccc.de/congress/2025/hub/https://usercontent.events.ccc.de/congress/2025/hub/usercontent/e/f3969bb74b6f/1280-959-max.jpg Marty https://events.ccc.de/congress/2025/hub/event/detail/pony-pracht-nina-bendix-igleses-water-to-voice false 2025-12-28T10:50:00+01:00 10:50 00:10 CDC Triangle 39c3-intro-to-the-critical-decentralization-cluste_df6i en Talk Welcome and presentation of the CDC. Diego Salazar https://events.ccc.de/congress/2025/hub/event/detail/intro-to-the-critical-decentralization-cluste_df6i https://pretalx.riat.at/39c3/talk/G7X9WM/ false 2025-12-28T11:00:00+01:00 11:00 00:20 CDC Triangle 39c3-intro-to-tropicsquare-tropic01-workshops-at-cdc en other Introduction to the TROPIC01 Open Source Secure Element and the CDC Badge. Kick-Off of the Workshop series at the Critical Decentralisation Cluster. https://events.ccc.de/congress/2025/hub/event/detail/intro-to-tropicsquare-tropic01-workshops-at-cdc false 2025-12-28T11:00:00+01:00 11:00 01:00 CDC Triangle 39c3-open-legal-qa-with-judith-de-boer-can-i-get-arrest en other Judith de Boer is leading the Alex Pertsev's legal defence team — fighting his "Alex could've thought that his code will be used by criminals, but still wrote it — so he's guilty of criminal conspiracy" verdict from a Dutch court. Kirill https://events.ccc.de/congress/2025/hub/event/detail/open-legal-qa-with-judith-de-boer-can-i-get-arrest false 2025-12-28T12:30:00+01:00 12:30 02:00 CDC Triangle 39c3-iroh-p2p-chat-over-gossip en Workshop In this workshop we'll look at how iroh establishes p2p QUIC connections. Using holepunching to create direct connections where possible. Then we'll build on top of this by using the gossip protocol to build a group chat. iroh is a library to establish direct connections between two peers. The workshop will start with an overview of how iroh works and what it provides. After this we'll explore establishing connections between two endpoints before progressing to using a gossip protocol to send messages to multiple peers. At the end we should have a simplistic group chat application. https://pretalx.riat.at/media/39c3/submissions/SKBRPH/iroh-wordmark-purple_eeOv4Y2.svg Floris Bruynooghe https://events.ccc.de/congress/2025/hub/event/detail/iroh-p2p-chat-over-gossip https://pretalx.riat.at/39c3/talk/SKBRPH/ false 2025-12-28T14:30:00+01:00 14:30 02:00 CDC Triangle 39c3-embedding-anonymity-directly-in-your-application en Workshop A deep dive into using Embedded I2P to seamlessly anonymize your applications Anonymity is more important than ever, and it's not an easy job. Our job is to make it easier! The I2P project is excited to demonstrate 2 new projects, the `go-i2p` and `emissary` embedded router projects. We'll look at how they work and why they're an easier, more accessible way of providing anonymity to your users than freestanding external services. Primary target audience is Go, Rust, and C developers, I2P library developers, and people working on anonymous P2P applications. https://pretalx.riat.at/media/39c3/submissions/JXG9XP/idk_IlsFAM6.png idk https://events.ccc.de/congress/2025/hub/event/detail/embedding-anonymity-directly-in-your-application https://pretalx.riat.at/39c3/talk/JXG9XP/ false 2025-12-28T16:30:00+01:00 16:30 01:00 CDC Triangle 39c3-zero-knowledge-proofs-workshop en Workshop Zero-knowledge proofs (ZKPs) are reshaping the landscape of privacy, scalability, and trust in decentralized systems. In this workshop, we’ll explore how ZKPs let one party convince another that a statement is true, without revealing anything else about it. We aim to demystify the core ideas behind interactive protocols, walk through modern ZKP constructions, and examine how they’re deployed in cryptocurrencies and modern privacy-preserving designs. Participants will leave with a clear understanding of how the "prove without revealing" paradigm is shaping blockchain technology, verifiable computation, and the next generation of cryptographic standards. Freeman Slaughter https://events.ccc.de/congress/2025/hub/event/detail/zero-knowledge-proofs-workshop https://pretalx.riat.at/39c3/talk/SANGLF/ false 2025-12-28T17:30:00+01:00 17:30 00:30 CDC Triangle 39c3-radicle-p2p-censorship-resistant-code-collaboratio en Talk [Radicle](https://radicle.xyz/) is an open source, peer-to-peer code collaboration stack built on Git. Unlike centralized code hosting platforms, such as GitHub or GitLab, there is no single entity controlling the network. Repositories are replicated across peers in a decentralized manner, and users retain sovereignty over their data and workflow. *Free your code!* Today, much of the open-source ecosystem depends on a few centralized code forges, even though modern version control systems are designed with fully distributed collaboration in mind. This creates questionable dependencies with regards to governance and supply-chain security. In this talk, we explore an alternative: [Radicle](https://radicle.xyz/), a decentralized, peer-to-peer code collaboration stack built on Git, that empowers developers to work together while staying sovereign. Unlike traditional, centralized code forges that can impose censorship, Radicle ensures that each user retains control over their data, interactions, and collaboration, free from corporate influence. This aligns with broader movements toward decentralization, open-source software, and the democratization of internet services. We introduce the system, provide a progress update, and share what we are currently working on. Attendees gain a comprehensive understanding of Radicle’s technical architecture, its practical benefits for decentralized code collaboration, and how it contributes to a more autonomous and resilient future for open-source development. Find out more: - [FAQ of the project (radicle.xyz)](https://radicle.xyz/faq) - [*How we built a gossip layer and CRDT on top of Git* by Alexis Sellier at GitMerge 2024 (youtube.com)](https://www.youtube.com/watch?v=tsVa53SPIHc) - [Release Notes for 1.0 (radicle.xyz)](https://radicle.xyz/2024/09/10/radicle-1.0.html) - [radicle.zulipchat.com](https://radicle.zulipchat.com)d *Free your code!* https://pretalx.riat.at/media/39c3/submissions/CDSLJX/radicle_mvRS2xu_4bRQVgq.svg Lorenz Leutgeb https://events.ccc.de/congress/2025/hub/event/detail/radicle-p2p-censorship-resistant-code-collaboratio https://pretalx.riat.at/39c3/talk/CDSLJX/ false 2025-12-28T18:00:00+01:00 18:00 00:40 CDC Triangle 39c3-the-bitcoin-security-budget-and-its-implications-a en Talk The Bitcoin security budget has profound implications for the long term security of Bitcoin and similar proof of work cryptocurrencies. In this talk we discuss the various types of transaction fee markets for different cryptocurrencies and the possibility of transaction fees replacing falling block rewards to provide security in the future. The results from our analysis of the Monero fee market in particular do pose some very serious questions regarding the long term security and viability of cryptocurrencies that do not have a minimum fixed block reward or tail emission. We will discuss these questions and their implications for the possibility of a worldwide peer-to-peer electronic cash system. Satoshi Nakamoto released Bitcoin: A Peer-to-Peer Electronic Cash System, in October 2008, https://bitcoin.org/bitcoin.pdf, during the 2008 financial crisis. The Bitcoin genesis block was mined in January 2009 launching the Bitcoin network. The design of Bitcoin has a maximum money supply of 21 million Bitcoin (BTC). The security budget consisting of the block reward and transaction fees per block is paid to the miner (creator) of each block as an incentive to secure the network. The blocks in Bitcoin are approximately every 10 minutes. The block reward is required by consensus to halve approximately every 4 years, starting at 50 BTC per block in 2009, and is currently at 3.125 BTC per block. This leads to a current annual growth rate of the total Bitcoin money supply that is below 1%. The next halving to 1.5625 BTC is estimated to occur in April of 2028. Transaction fees are currently less than 1% of the total Bitcoin security budget. It is claimed in section 6 of the Bitcoin whitepaper that: “Once a predetermined number of coins have entered circulation, the incentive can transition entirely to transaction fees and be completely inflation free”; however no evidence, theory or references are provided to support this claim. The above model, with some variations, has been followed by most of the top proof of work cryptocurrencies, including Bitcoin Cash (BCH), Litecoin (LTC), and ZCash (ZEC). There are however some notable exceptions, Dogecoin (DOGE) and Monero (XMR). Both Dogecoin and Monero have fixed block rewards. In Dogecoin this was the result of a bug in the code; however in Monero a fixed minimum block reward or tail emission was deliberately set at the constant rate 0.6 XMR per block. The blocks in Monero are approximately every 2 minutes. This leads to an annual growth rate of the total Monero money supply that is below 1%. For comparison the historical annual compounded rate of growth of the gold money supply is close to 1%. The fee market in a cryptocurrency is also highly dependent on whether the blocksize is fixed, as in Bitcoin, Dogecoin, Litecoin and ZCash or adaptive as in Bitcoin Cash and Monero. In the case of adaptive blocksizes the question becomes: Is there a penalty (cost) to increase the blocksize as in Monero or no cost to increase the blocksize as in Bitcoin Cash? A balance needs to be found in the design of a cryptocurrency between allowing for blocksize growth in order to support the transaction demand for peer to peer electronic cash, and the necessity of spam mitigation. The use of privacy preserving technologies can also have a profound impact on this balance, by increasing the transaction size, while at the same time preventing the use of censorship, as a means of spam mitigation. In Monero for example this increase will be by a factor of around 20 times, after the upcoming Full Chain Membership Proofs, plus plus (FCMP++) hard fork. This makes finding this balance in cryptocurrencies such as Monero with no option to opt out of privacy, by far the hardest. On the other hand a solution that works in Monero will also work in a cryptocurrency with a lesser degree of privacy. In the presentation we will discuss the following questions: How do the various types of fee markets: fixed blocksize, adaptive blocksize with penalty, and adaptive blocksize without penalty work? Can transaction fees replace the falling block rewards or are fixed block rewards necessary? Are there advantages or disadvantages to replacing block rewards with transaction fees? Is it possible to have a fixed block reward and still be inflation free? Do we have a peer-to-peer electronic cash system or just another kind of asset for investment and speculation using centralized financial institutions? Is a worldwide peer-to-peer electronic cash system possible now or in the foreseeable future? We will also discuss some of the broader implications Francisco "ArticMine" Cabañas https://events.ccc.de/congress/2025/hub/event/detail/the-bitcoin-security-budget-and-its-implications-a https://pretalx.riat.at/39c3/talk/9ZX9ET/ false 2025-12-28T19:00:00+01:00 19:00 00:30 CDC Triangle 39c3-real-world-timestamping-with-opentimestamps en Talk How is OpenTimestamps used in the real world? We'll explain how it achieves cryptographic timestamping, and show some read world examples of it in use such as the Guatemalan Presidential Election. Peter Todd https://events.ccc.de/congress/2025/hub/event/detail/real-world-timestamping-with-opentimestamps https://pretalx.riat.at/39c3/talk/TYKHNF/ false 2025-12-28T20:00:00+01:00 20:00 00:30 CDC Triangle 39c3-passkeys-the-good-the-bad-the-ugly en Talk Passkeys are the new hype for easy onboarding, but it's a quite old protocol that has been hijacked for crypto purposes. We'll dig through the standard history, the potentially misleading security expectations, and see how to reverse engineer an implementation to validate its soundness This is a rebroadcast of my devcon 7 presentation (https://archive.devcon.org/devcon-7/passkeys-the-good-the-bad-the-ugly/?tab=YouTube) with some additional details on modern ETH wallets implementations btchip https://events.ccc.de/congress/2025/hub/event/detail/passkeys-the-good-the-bad-the-ugly https://pretalx.riat.at/39c3/talk/7TDXST/ false 2025-12-28T20:30:00+01:00 20:30 00:30 CDC Triangle 39c3-diy-bioreactors-for-mycology-and-biohacking en Talk Augustin Bielefeld, principal engineer at Eilbek Research, has been growing mycelium and other micro-organisms since 2023, and will present his journey building a reproducible and affordable bioreactor, which is destined to be open-sourced. This talk is aimed at people with an interest in mycology/microbiology but the principles demonstrated are accessible to everyone. Mycology is one of the fastest growing hobbies in the biohacking/microbiology scene, people cultivate and grow mushrooms for their taste, nootropic properties, and even as construction materials. Bioreactors, while rarely found on a hobbyist's desk - are the proper way to carry out cultivation and innoculation of micro-organism. This talk will explain their principles in simple terms, as well as showing off the speaker's journey building a reproducible and affordable reactor. Bioreactors are not usually found in hobbyists mushroom growers yet they enable: - Very fast culture times compared to usual jars - Efficient and sterile innoculation and expansion - Cultivation not just of mycelium, but of any microorganism such as algae, or even insulin producing bacteria The demonstrator that will be presented enables not only cultivation of mycelium of all types, but also cultivation of complex micro-organisms such as insulin-producing bacteria, and other DIY-medicine goals. Augustin Bielefeld https://events.ccc.de/congress/2025/hub/event/detail/diy-bioreactors-for-mycology-and-biohacking https://pretalx.riat.at/39c3/talk/TRJTLG/ false 2025-12-28T21:00:00+01:00 21:00 00:30 CDC Triangle 39c3-referendum-citoyen-the-revolutionnary-app en Talk this talk will present the story behind the "referendum citoyen" app, the ZK tech built by Rarimo team, but also how social movements are embracing cypherpunk tools to engage into challenging the structure of power in a country such France. The voting app is a simple blockchain voting app, based on ZK proof generated from a french ID card. The presentation will deep dive in the tech part, first but also present the social movement that wants to bring the referendum culture in France through a voting system that is independent from the State infrastructure, but still can prove that voters are french with the ID digital signature. The voting app is Work in Progress and needs a lot of work. This is also an open call for hackers to help improve and make the app the easiest app for people. https://github.com/ReferendumCitoyen/referendum-citoyen-react-native Alexis Roussel https://events.ccc.de/congress/2025/hub/event/detail/referendum-citoyen-the-revolutionnary-app https://pretalx.riat.at/39c3/talk/YRYKY3/ false 2025-12-28T22:00:00+01:00 22:00 00:30 CDC Triangle 39c3-xmpp-and-metadata en Talk In this talk, I will cover how XMPP manages metadata, what is technically required for which reason, what could be avoided and with which drawbacks, and do some comparisons with centralized (e.g. signal), other decentralized (e.g. matrix) and other systems trying to solve the same issue. mathieui https://events.ccc.de/congress/2025/hub/event/detail/xmpp-and-metadata https://pretalx.riat.at/39c3/talk/DCJXBV/ false 2025-12-28T22:30:00+01:00 22:30 04:00 CDC Triangle 39c3-gnu-boot-install-party en Workshop Boot software like BIOS or UEFI are usually nonfree. They still run after the operating system is booted and often contain restrictions (like refusing to boot when the WiFi card is replaced) and are usually related to technologies of control like the Management engine or similar. On computers with a Management engine, replacing the nonfree BIOS with GNU Boot also removes the Management Engine operating system. The install party will take place in a room at the GNU Boot assembly location and the maintainers will be available to help you install GNU Boot on a supported computer (see https://www.gnu.org/software/gnuboot/status.html for a list). neox GNUtoo https://events.ccc.de/congress/2025/hub/event/detail/gnu-boot-install-party https://pretalx.riat.at/39c3/talk/PLYJF8/ false 2025-12-28T11:00:00+01:00 11:00 01:00 Saal 5 39c3-jugend-hackt-stickpatch-mit-led_flv7 de Workshop Bring Dein Jugend hackt-Stickpatch mit einer Farbwechsel-LED zum Leuchten. Du bekommst ein farbintensives Patch mit 39C3- und Jugend hackt-Motiv. Auf der Rückseite stattest Du es mit einem Batteriehalter aus und auf der Vorderseite mit einer LED, um einen schönen Leuchteeffekt zu erzielen. Wenn Du möchtest, kannst Du Dein Patch mithilfe von Druckknöpfen auf einem Stoffbeutel befestigen und auf dem Congress und überall sonst zeigen. Vorkenntnisse sind nicht erforderlich. Wir freuen uns auf Dich! https://pretalx.chaos.jetzt/media/jugend/submissions/QEEZWD/39C3-Stickpatch-Jugendhackt2_JRcbLiD.jpeg anma https://events.ccc.de/congress/2025/hub/event/detail/jugend-hackt-stickpatch-mit-led_flv7 https://pretalx.chaos.jetzt/jugend/talk/QEEZWD/ https://pretalx.chaos.jetzt/jugend/talk/QEEZWD/feedback/ false 2025-12-28T12:15:00+01:00 12:15 02:30 Saal 5 39c3-einen-cli-mit-rust-erstellen de Workshop Lerne, wie Du mit Rust und der Clap-Bibliothek Schritt für Schirtt einen eigenen CLI programmieren kannst! Fällt eventuell aus ## Beschreibung Möchtest Du die Grundlagen von Rust lernen und dabei direkt ein praktisches Projekt umsetzen? In diesem Workshop kannst Du lernen, wie Du ohne Rust-Vorkenntnisse einen eigenen CLI mit Rust und der Clap-Bibliothek erstellen kannst. Rust ist eine sehr Interessante, schnelle und sichere Programmiersprache, welche seit Jahren von Entwicklern weltweit als beliebteste überhaupt gewählt wird, und Clap macht es ganz einfach einen CLI zu programmieren. Der Workshop ist ideal für alle Rust-Interessierten. ## Was erwartet dich? - Wichtigste Rust Strukturen - Erstellen von einem Rust Projekt mit Cargo - Clap Bibliothek zum erstellen eines CLIs ## Bitte bringe Folgendes mit - Programmiervorkenntnisse (Rust Kenntnisse nicht nötig) - Laptop (Cargo sollte installiert sein) - Internetverbindung Dimi https://events.ccc.de/congress/2025/hub/event/detail/einen-cli-mit-rust-erstellen https://pretalx.chaos.jetzt/jugend/talk/NT789K/ https://pretalx.chaos.jetzt/jugend/talk/NT789K/feedback/ false 2025-12-28T14:45:00+01:00 14:45 01:00 Saal 5 39c3-roboter-action-mit-dem-mbot2 de Workshop Hast du Lust, in die Welt der Roboter-Programmierung einzutauchen und gemeinsam mit anderen den mBot2 auszuprobieren? Dann bist du in unserem Workshop genau richtig! Für Jugendliche zwischen 12 und 18 Jahren In diesem Workshop wirst du in deinem Team einen mBot2-Roboter programmieren. Dabei lernst du, wie Roboter sich in ihrer Umgebung orientieren, Hindernisse erkennen oder selbstständig einer Linie folgen können. 🤖 Lass den mBot2 auf einer vordefinierten Bahn fahren, in Regenbogenfarben blinken, coole Sounds abspielen oder auf dein Kommando stoppen – und was passiert eigentlich, wenn sich zwei Roboter unerwartet begegnen? Lass es uns gemeinsam herausfinden. 🌈 Egal, ob du schon Erfahrung mit Programmierung hast oder dich zum ersten Mal damit beschäftigst – hier kannst du Neues lernen, kreativ werden und mit anderen Technikbegeisterten Spaß haben. https://pretalx.chaos.jetzt/media/jugend/submissions/GMR7W3/mbot-quelle-mtk-sept-2022-berlin-560x56_rbGFhFV.jpg Gerd Kant https://events.ccc.de/congress/2025/hub/event/detail/roboter-action-mit-dem-mbot2 https://pretalx.chaos.jetzt/jugend/talk/GMR7W3/ https://pretalx.chaos.jetzt/jugend/talk/GMR7W3/feedback/ false 2025-12-28T15:45:00+01:00 15:45 00:30 Saal 5 39c3-nudeln-hacken-hacking-noodles-2_nd7k de Talk Wettbewerb für Junghackerinnen von 5 Jahren bis 1000 Spaß am Gerät: Mehrere Teams bauen gleichzeitig mit Nudeln um die Wette. Dabei geht es um kreativen Umgang mit Technik und die Erfahrung, dass man Dinge auch jenseits der eigentlichen Verwendungszwecke gut gebrauchen kann. Junghacker bzw. solche die es werden wollen, können alleine oder als Team kommen. Es kann jeder mitmachen, der weiß, was eine Nudel ist. PS: Es werden keine Lebensmittel verschwendet. PPS: Erwachsene dürfen auch mitmachen, wenn sie den Junghacker keinen Platz wegnehmen. Sie werden aber wahrscheinlich gegen den Nachwuchs verlieren :-D StefanH https://events.ccc.de/congress/2025/hub/event/detail/nudeln-hacken-hacking-noodles-2_nd7k https://pretalx.chaos.jetzt/jugend/talk/JECDU7/ https://pretalx.chaos.jetzt/jugend/talk/JECDU7/feedback/ false 2025-12-28T18:00:00+01:00 18:00 00:30 Saal 5 39c3-nudeln-hacken-hacking-noodles-2_cylq de Talk Wettbewerb für Junghackerinnen von 5 Jahren bis 1000 Spaß am Gerät: Mehrere Teams bauen gleichzeitig mit Nudeln um die Wette. Dabei geht es um kreativen Umgang mit Technik und die Erfahrung, dass man Dinge auch jenseits der eigentlichen Verwendungszwecke gut gebrauchen kann. Junghacker bzw. solche die es werden wollen, können alleine oder als Team kommen. Es kann jeder mitmachen, der weiß, was eine Nudel ist. PS: Es werden keine Lebensmittel verschwendet. PPS: Erwachsene dürfen auch mitmachen, wenn sie den Junghacker keinen Platz wegnehmen. Sie werden aber wahrscheinlich gegen den Nachwuchs verlieren :-D StefanH https://events.ccc.de/congress/2025/hub/event/detail/nudeln-hacken-hacking-noodles-2_cylq https://pretalx.chaos.jetzt/jugend/talk/HEZHGF/ https://pretalx.chaos.jetzt/jugend/talk/HEZHGF/feedback/ false 2025-12-28T19:00:00+01:00 19:00 01:00 Saal 5 39c3-antifa-recherche-meetup_ak0s de Workshop Machst du (antifaschistische) Recherche Arbeit? hast du OSINT Kompetenzen? kennst du dich mit Web Scraping aus? Hast du Einblick in Rechte Strukturen? Wir wollen uns zusammen setzen um uns darüber auszutauschen, wie antifaschistische Aufklärungs und Recherchearbeit im Ditigalen Raum aussehen kann, Erfahrungen und Kompetenzen austauschen und uns zu vernetzen. Do you do (anti-fascist) research work? do you have OSINT skills? are you familiar with web scraping? Do you have insight into right-wing structures? We want to sit down together to exchange ideas about what anti-fascist education and research work in the digital area can look like, to exchange experiences and competencies and to network. Machst du (antifaschistische) Recherche Arbeit? hast du OSINT Kompetenzen? kennst du dich mit Web Scraping aus? Hast du Einblick in Rechte Strukturen? Wir wollen uns zusammen setzen um uns darüber auszutauschen, wie antifaschistische Aufklärungs und Recherchearbeit im Ditigalen Raum aussehen kann, Erfahrungen und Kompetenzen austauschen und uns zu vernetzen. Do you do (anti-fascist) research work? do you have OSINT skills? are you familiar with web scraping? Do you have insight into right-wing structures? We want to sit down together to exchange ideas about what anti-fascist education and research work in the digital area can look like, to exchange experiences and competencies and to network. Leon B. https://events.ccc.de/congress/2025/hub/event/detail/antifa-recherche-meetup_ak0s https://pretalx.chaos.jetzt/jugend/talk/SHCPRR/ https://pretalx.chaos.jetzt/jugend/talk/SHCPRR/feedback/ false 2025-12-28T13:00:00+01:00 13:00 01:00 House of Tea 39c3-imagining-emergent-network-structures en, de other What might future p2p networks look like? In the early 2000s, a range of p2p network structures were explored. This led to systems in use today for both coordination (like DHTs) and communication (like Gossiping). We have more tools today to model, prototype, and evaluate structures. The first step though is to imagine them. What can we design to reach cases beyond DHTs? - What might network-level structures look like that might be safer, more scalable, more private, and/or more resilient than the ones we have today? Tables will be provided with seeding inspiration and paper for recording ideas, to serve as inspiration for subsequent network system modeling. willscott https://events.ccc.de/congress/2025/hub/event/detail/imagining-emergent-network-structures false 2025-12-28T14:30:00+01:00 14:30 01:00 House of Tea 39c3-archipel-a-local-delay-tolerant-network-for-humans en other Come drink some tea and learn about how a slower internet can help empower people and maybe fight capitalism a bit more. Maybe with help of Delay Tolerant Networks, Bundle Protocol and Archipel. Delay Tolerant networks are special kinds of network that allow messages to be transmitted with a (very) long delay. This is achieved by storing data along routing path, on each node. Archipel is an experimental implementation of Bundle Protocol focused on creating a more human network and reducing ecological footprint of network infrastructures. This meetup is a conversation to present and talk about Delay Tolerant Networks and Archipel. We'll take some tea and talk about how a slower internet can help empower people and maybe fight capitalism a bit more. Learn more about Archipel on https://archipelproject.net/ kiwi https://events.ccc.de/congress/2025/hub/event/detail/archipel-a-local-delay-tolerant-network-for-humans false 2025-12-28T15:45:00+01:00 15:45 01:00 House of Tea 39c3-secure-offline-communications-whats-next en other It's the end of 2025 and digital authoritarianism becomes only ever more sophisticated. We want to use this opportunity to pause and reflect: how is the situation for citizens in different contexts around the world? What are people's actual needs? Which projects exist in this space? What is today's consumer hardware and software capable of to help making connections despite all attempts to the contrary? While this session is hosted by The Briar Project, we explicitly welcome all other collectives and individuals interested and working in this area of Internet shutdowns and digital censorship. Let's see where we can join forces to best serve users' needs. https://events.ccc.de/congress/2025/hub/https://usercontent.events.ccc.de/congress/2025/hub/usercontent/e/39a096980f62/graph-p2p-sharing.png Nico@Briar https://events.ccc.de/congress/2025/hub/event/detail/secure-offline-communications-whats-next false 2025-12-28T19:00:00+01:00 19:00 02:00 House of Tea 39c3-lets-talk-about-psychedelics-honey en other Come join us for conversations about psychedelics at House of Tea! Do you have questions about Psychedelics, or other mind-altering substances that you never dared to ask? Do you love the idea of hanging out with others who may have similar curiosities? Want to know what all the fuzz is about? Come join me (Indiv, a studied neuroscientist & experienced psychonaut) and the Others at House of Tea for..well.. tea, inspiring conversation, maybe some new knowledge, and connection to like-minded individuals. This event may represent a check for level of interest for a presentation on Psychedelics that I will try to SOS the next day. You are invited to participate whatever your prior knowledge on the subject. Come out, come out, whomever you are 💟 Indivisual https://events.ccc.de/congress/2025/hub/event/detail/lets-talk-about-psychedelics-honey false 2025-12-28T21:30:00+01:00 21:30 00:30 House of Tea 39c3-the-spoon-game-39c3-special-edition-workshop-_iejc en other "The Spoon Game" is an interactive workshop that challenges participants through a journey inspired by the CCC to enlighten you on a curious notion that will change your perspective on spoons for sure! Can you join the choir that sings only in modem beeps? Will you win the speed-typing competition on a reverse Dvorak keyboard? Will you be able to take part in the most chaotic but functional wiring competition? Seemingly trivial questions, but with surprising implications! To understand what connects these mysterious situations, come and discover "The Spoon Game", designed and hosted by Atypha. A workshop around a fascinating game that will change the way you see spoons forever! ⚠️ 7 people/session maximum to ensure a good workshop. Book you slot now: [https://urlr.me/t3DYx6](https://urlr.me/t3DYx6) [#Inclusion](https://events.ccc.de/congress/2025/hub/tag/Inclusion) [#accessibility](https://events.ccc.de/congress/2025/hub/tag/accessibility) https://events.ccc.de/congress/2025/hub/https://usercontent.events.ccc.de/congress/2025/hub/usercontent/e/afad18136f85/Banner-3-The-Spoon-Game.png Atypha (She) https://events.ccc.de/congress/2025/hub/event/detail/the-spoon-game-39c3-special-edition-workshop-_iejc false 2025-12-28T11:00:00+01:00 11:00 02:00 CDC Circle 39c3-programming-the-tropic01-open-source-secure-elemen en Workshop Let's program it on the HATs and shields. Pavel Polach https://events.ccc.de/congress/2025/hub/event/detail/programming-the-tropic01-open-source-secure-elemen https://pretalx.riat.at/39c3/talk/XF3RKT/ false 2025-12-28T13:30:00+01:00 13:30 00:30 CDC Circle 39c3-the-darkfi-super-app en Talk Anonymous, Uncensored, Sovereign: How DarkFi gives birth to a new Paradigm of Society. Hi, my name is Yuki and I am part of the DarkFi community. Out of this user/community perspective I will tell you something about the philosophy of DarkFi, the anonymous tech-stack, Lunarpunk, the Desert vs Forest, RegFi vs DarkFi and the DarkFi Vision. The talk will not go to deep in the low level tech, because I am also just learning about them :) I plan to keep the talk short and have a Q&A personally after the talk, in a more 'relaxed' environment. note: As you might expect, the talk will be held in english. But I can also speak german, if needed f.e P.S: This is the first talk I will hold, I am very excited :) https://pretalx.riat.at/media/39c3/submissions/LK9MK3/media_GqwBPIVW8AAXeDU_2e2iV8F.jpeg Yuki https://events.ccc.de/congress/2025/hub/event/detail/the-darkfi-super-app https://pretalx.riat.at/39c3/talk/LK9MK3/ false 2025-12-28T16:00:00+01:00 16:00 02:00 CDC Circle 39c3-making-own-z-wave-or-zigbee-device-from-scratch-an en Workshop We will program a Z-Wave or a Zigbee device and add it into a Z-Way smart home controller installed on Linux or flashed into an ESP32. We will be making own Z-Wave and Z-Wave Long Range devices Z-Wave Open Source SDK an Trident IoT SDK. It will also be possible to do Zigbee devices. We will program a sensor and a switch using Z-Wave protocol and include it in a Z-Wave network. Or Zigbee. We will also browse the Z-Wave Open Source project, and how existing Trident IoT and SiLabs code differ from them. We will also install Linux version of Z-Way - Z-Wave/Zigbee/Matter Smart Home Controller. You will learn basics of Z-Wave and Z-Wave Long Range, how to include devices and set up security schemes. We will also master using Z-Way smart home controller, investigate it's API and create own Linux or ESP32-based Z-Wave or Zigbee controller. We will also discuss Z-Wave/Zigbee-to-Matter bridging. You will need a laptop (Linux, Mac or Windows) with SSH client, USB A, Google Chrome and internet access. Optionally you can use VS Code (install Trident IoT extension). Bring your Z-Wave devices with you! If you have Home Assistant Connect ZWA-2, take it too! Presentation: https://docs.google.com/presentation/d/1EJFr8toheFOOE_k4l23wkLd98NE8yb8UbnnkNd2UKqU PoltoS https://events.ccc.de/congress/2025/hub/event/detail/making-own-z-wave-or-zigbee-device-from-scratch-an https://pretalx.riat.at/39c3/talk/8VNVWK/ false 2025-12-28T18:00:00+01:00 18:00 02:00 CDC Circle 39c3-radicle-setup-and-introduction en Workshop [Radicle](https://radicle.xyz/) is an open source, peer-to-peer code collaboration stack built on Git. Unlike centralized code hosting platforms, such as GitHub or GitLab, there is no single entity controlling the network. Repositories are replicated across peers in a decentralized manner, and users retain sovereignty over their data and workflow. *Free your code!* Attend this workshop if you would like to try out Radicle. We'll set it up, and learn how to replicate a Git repository of your choice on the network. Further, learn how to use Radicle Patches and Radicle Issues for collaboration. https://pretalx.riat.at/media/39c3/submissions/TXTPLK/radicle_mvRS2xu_yTrnGwu.svg Lorenz Leutgeb https://events.ccc.de/congress/2025/hub/event/detail/radicle-setup-and-introduction https://pretalx.riat.at/39c3/talk/TXTPLK/ false 2025-12-28T20:00:00+01:00 20:00 02:00 CDC Circle 39c3-p2p-vms-pluralistic-composability-interoperability en Workshop How do we create a pluralistic yet composable and interoperable ecosystem of decentralized applications? Introduction to the fantastic world of P2P μVMs and discussion about making them a reality. ## Topics - μVMs & unikernels - pluralistic composability via minimalistic & layered protocol design - decentralized applications & services running in cryptographically addressed μVMs - using well-known protocols as unified message passing mechanism for decentralized applications - pluralism on the P2P transport, overlay, and application layers ## Format Short introduction followed by a discussion between researchers & developers working on projects related to μVMs, P2P/NGI protocols, and their intersection. ## Context See [WaxOS](https://WaxOS.net) for a brief overview of ongoing research. tg-x https://events.ccc.de/congress/2025/hub/event/detail/p2p-vms-pluralistic-composability-interoperability https://pretalx.riat.at/39c3/talk/LGLTBV/ false 2025-12-28T22:00:00+01:00 22:00 00:45 CDC Circle 39c3-new-features-in-bitcoin-self-custody en Talk Introduction to miniscript with Liana for secure Bitcoin self-custody using hardware wallets and recovery paths. Polto, Darko https://events.ccc.de/congress/2025/hub/event/detail/new-features-in-bitcoin-self-custody https://pretalx.riat.at/39c3/talk/JENEDU/ false 2025-12-28T13:00:00+01:00 13:00 02:00 Chaoswellen Assembly 39c3-pota-parks-on-the-air-day-2 de, en other Introduction to Parks on the Air (POTA). POTA is an international radiosport award program that encourages licensed amateur radio operators to visit, enjoy and operate portable equipment in a variety of parks and public lands. POTA introduction "in a nutshell" followed by joint POTA activation on shortwave in the "Planten un Blomen" park right next to the CCH. We meet daily at 01:00 p.m. at the Assembly for a short introduction and then go out into the park together. The participants learn how to set up a portable shortwave station and get a crash course in shortwave operation. Then it's time to get on the air! Other radio amateurs around the world are waiting to contact us. Can you manage the 10 radio connections necessary for a successful "activation" of the park? NOTE: We meet AT THE CHAOSWELLE ASSEMBLY and start there with a short introduction to the POTA program. Then we go out into the park together. Dress warmly and weatherproof! We go outside even when it's raining or snowing! If anyone wants to join us later: radio amateurs can reach us in the park on 145.500 MHz FM. Our location in the park: [OpenStreetMap](https://www.openstreetmap.org/directions?engine=fossgis_osrm_foot&route=53.561346%2C9.986447%3B53.559593%2C9.986438#map=18/53.560490/9.986277) https://events.ccc.de/congress/2025/hub/https://usercontent.events.ccc.de/congress/2025/hub/usercontent/e/6ea30c950450/pota_banner_winter_2.jpg DK4HAA https://events.ccc.de/congress/2025/hub/event/detail/pota-parks-on-the-air-day-2 false 2025-12-28T16:30:00+01:00 16:30 02:00 Chaoswellen Assembly 39c3-lateshift-pota-parks-on-the-air de, en other Introduction to Parks on the Air (POTA). POTA is an international radiosport award program that encourages licensed amateur radio operators to visit, enjoy and operate portable equipment in a variety of parks and public lands. Due to popular demand, now also available at a later time! Due to popular demand, now also available at a later time! POTA introduction "in a nutshell" followed by joint POTA activation on shortwave in the "Planten un Blomen" park right next to the CCH. We meet daily at 01:00 p.m. at the Assembly for a short introduction and then go out into the park together. The participants learn how to set up a portable shortwave station and get a crash course in shortwave operation. Then it's time to get on the air! Other radio amateurs around the world are waiting to contact us. Can you manage the 10 radio connections necessary for a successful "activation" of the park? NOTE: We meet AT THE CHAOSWELLE ASSEMBLY and start there with a short introduction to the POTA program. Then we go out into the park together. Dress warmly and weatherproof! We go outside even when it's raining or snowing! If anyone wants to join us later: radio amateurs can reach us in the park on 145.500 MHz FM. Our location in the park: [OpenStreetMap](https://www.openstreetmap.org/directions?engine=fossgis_osrm_foot&route=53.561346%2C9.986447%3B53.559593%2C9.986438#map=18/53.560490/9.986277) https://events.ccc.de/congress/2025/hub/https://usercontent.events.ccc.de/congress/2025/hub/usercontent/e/aaec5c71f1fa/pota_banner_winter.jpg DK4HAA https://events.ccc.de/congress/2025/hub/event/detail/lateshift-pota-parks-on-the-air false 2025-12-28T20:00:00+01:00 20:00 01:00 Chaoswellen Assembly 39c3-funksender-finden-mit-gehackten-funkgeraten de other Amateurfunkpeilen mit günstigen Funkgeräten und OpenSource-Firmware und das Projekt draussenfuchs.de im Überblick. This talk will be in German. Amateur radio direction finding with inexpensive radios and open-source firmware, and an overview of the draussenfuchs.de project. DK4HAA https://events.ccc.de/congress/2025/hub/event/detail/funksender-finden-mit-gehackten-funkgeraten false 2025-12-28T10:00:00+01:00 10:00 00:45 Kidspace - Workshopraum 39c3-nudeln-hacken-hack-noodles de, en other Wettbewerb für Junghackerinnen von 5 Jahren bis 1000 Spaß am Gerät: Mehrere Teams bauen gleichzeitig mit Nudeln um die Wette. Dabei geht es um kreativen Umgang mit Technik und die Erfahrung, dass man Dinge auch jenseits der eigentlichen Verwendungszwecke gut gebrauchen kann. Junghacker bzw. solche die es werden wollen, können alleine oder als Team kommen. Es kann jeder mitmachen, der weiß, was eine Nudel ist. PS: Es werden keine Lebensmittel verschwendet. PPS: Erwachsene dürfen auch mitmachen, wenn sie den Junghacker keinen Platz wegnehmen. Sie werden aber wahrscheinlich gegen den Nachwuchs verlieren :-D ghenny https://events.ccc.de/congress/2025/hub/event/detail/nudeln-hacken-hack-noodles false 2025-12-28T11:15:00+01:00 11:15 01:30 Kidspace - Workshopraum 39c3-deutsche-gebardensprache-dgs de other Nicht nur Handzeichen und Fingeralphabet Kinder (ca. 6-99 Jahre) sind herzlich eingeladen, an diesem Schnupperkurs teilzunehmen. Die Deutsche Gebärdensprache ist eine visuelle, vollwertige natürliche Sprache die nicht mit lautsprachlichem Deutsch verwandt ist. Sie wird vor allem in der Kommunikation zwischen und mit gehörlosen Menschen verwendet. In Deutschland gibt es eine lange Geschichte der Unterdrückung der Gebärdensprache. Kursleitung durch eine zertifizierte DGS-Dozentin. https://events.ccc.de/congress/2025/hub/event/detail/deutsche-gebardensprache-dgs false 2025-12-28T13:00:00+01:00 13:00 01:30 Kidspace - Workshopraum 39c3-end-of-10-linux-install-party-for-kids en, de other End of 10 - Linux install party for kids Do you have an old PC gathering dust at the bottom of a drawer? Bring it! We'll guide participating kids through the process of installing Linux Mint for the first time so they can have their own secure and up-to-date computer. https://events.ccc.de/congress/2025/hub/event/detail/end-of-10-linux-install-party-for-kids false 2025-12-28T14:45:00+01:00 14:45 01:00 Kidspace - Workshopraum 39c3-calliope-mini de other In diesem Workshop soll es eine Einführung in den Micro-Controller Calliope mini geben. Einstiegsfreundlich werden kleine Spiele und Effekte programmiert. Für Fortgeschrittene stehen zusätzlich zwei MotionKits zur Verfügung. Die Calliopes werden bereit gestellt, ein eigener Rechner (iPad oder Windows) ist erforderlich. Ideal wären mindestens 4 bis maximal 12 Teilnehmende. https://events.ccc.de/congress/2025/hub/event/detail/calliope-mini false 2025-12-28T16:00:00+01:00 16:00 01:00 Kidspace - Workshopraum 39c3-nummix-dojo-8 de, en other Mit Filzstiften, Pappbecher, Elektromotor und Batterien bauen wir uns einen tanzenden Kritzel-"Roboter". Ab 8 Jahren. arp (HE / HIM) https://events.ccc.de/congress/2025/hub/event/detail/nummix-dojo-8 false 2025-12-28T17:15:00+01:00 17:15 01:30 Kidspace - Workshopraum 39c3-linux-fur-einsteigerinnen-part-2 de other Wir begeben uns auf eine Entdeckungsreise durch Linux - von der Vielfalt eines Betriebssystems. Was ist (F)OSS? Wie sieht so ein Linux aus? Was kann man damit machen? Und kann man damit auch spielen? Wir wollen Linux für Schule und Freizeit zeigen, die Vorteile von freier OpenSource Software erklären, die Vielfalt der verfügbaren Programme und Tools sowie mit dem Vorurteil aufräumen, dass man zum Spielen dann ja doch immer Windows benötigt. Der Workshop soll an drei Tagen am Beispiel des Schulsticks durch die Vielfalt des Systems führen. Part 2: Abenteuer Kommandozeile Heute geht es um die Kommandozeile -- das mysteriöse, häufig schwarze Fenster mit heller Schrift. Warum benutzen wir Text-Kommandos und was kann man damit Tolles machen? Und wie man mit etwas Kommandozeilen-Magie Andere beeindrucken kann. Von den absoluten Basics bis zu komplexen Einzeilern -- natürlich wieder zum selbst erleben und mitmachen! Zielgruppe Dieser komplette Workshop ist für absolute Neulinge (Computer überhaupt und/oder Linux). Aber auch, wer schon Windows einsetzt und mal über den Tellerrand schauen will, vielleicht sogar schon einmal über einen Wechsel nachgedacht hat, sich aber (noch) nicht traut, ist herzlich willkommen! Voraussetzungen Interesse und Neugier. micu sylvia https://events.ccc.de/congress/2025/hub/event/detail/linux-fur-einsteigerinnen-part-2 false 2025-12-28T19:00:00+01:00 19:00 01:00 Kidspace - Workshopraum 39c3-dungeons-dragons-dd-intro-fur-junghackerinnen-12-b de other **Dauer:** 60 Minuten **Niveau:** absolut anfängerfreundlich **Material:** Wir bringen alles mit. **Maximale Teilnerinnenanzahl:** 6 In dieser kompakten Einsteigerunde lernen Jugendliche ab 12 Jahren die Grundideen von *Dungeons & Dragons* kennen – ohne komplizierte Regeln und ohne Vorwissen. Mit vorkonfigurierten Charakteren, einem klaren Mini-Abenteuer und stark vereinfachten Spielmechaniken erleben die Teilnehmenden sofort, wie sich gemeinsames Erzählen, Rätseln und Kämpfen am Spieltisch anfühlt. Der Fokus liegt auf Spaß, Story und Teamwork. Wer möchte, kann das Spiel anschließend an einem anderen Ort mit uns fortsetzen und vertiefen. Du hast Erfahrung und möchtest dich mit einbringen? Unterstütze uns gern! **Dieser Workshop wird geleitet von: ** ghenny https://events.ccc.de/congress/2025/hub/event/detail/dungeons-dragons-dd-intro-fur-junghackerinnen-12-b false 2025-12-28T20:15:00+01:00 20:15 01:30 Kidspace - Workshopraum 39c3-austausch-fur-eltern-und-bezugspersonen-von-t_cuxc de other Austausch für Eltern und Bezugspersonen von trans Kindern und nicht binären Kindern auf 39C3 Ich (Bunthoernchen) möchte hier einen sicheren Raum schaffen, in dem wir uns als Eltern von queeren Kindern austauschen können. Wie können wir unsere Kinder unterstützen? Welche Fragen kommen auf? Wie geht man mit Queerfeindlichkeit um? Was kommt auf mein Kind zu? Wie trete ich gegenüber Schule und Co auf? ... Willkommen sind alle Eltern und Bezugspersonen von trans Kindern und nicht-binären Kindern (und Jugendlichen). Ihr müsst kein Vorwissen haben, egal, wie neu das Thema für euch ist, ihr seid willkommen. Wer moderiert: Ich bin das Bunthoernchen, nutze die Pronomen: dey/dem und und bin Mama von drei Kindern. Eins meiner Kinder ist ein trans Kind. Ich habe einen pädagogischen Hintergrund und stehe im regelmäßigen Austausch mit anderen queeren Menschen. https://events.ccc.de/congress/2025/hub/event/detail/austausch-fur-eltern-und-bezugspersonen-von-t_cuxc false 2025-12-28T10:00:00+01:00 10:00 01:30 Kidspace - Hackcenter 39c3-spieleprogrammieren-mit-pygame de other Wir beschäftigen uns damit wie Spiele aufgebaut werden und funktionieren und programmieren ein eigenes Spiel auf Grundlage von einer erweiterbaren und je nach Zeit und Interesse vollständig austauschbaren Jump'n'Run-Vorlage. Wir arbeiten dabei mit der Programmiersprache Python und der dazugehörigen Bibliothek PyGame. Es ist kein Vorwissen notwendig um die Inhalte zu verstehen; der Workshop ist für alle geeignet die ein Interesse daran haben, zu verstehen wie Videospiele gemacht werden oder eigene Ideen für Spiele umsetzen wollen. Wer sich ein Laptop für den Workshop ausleihen möchte, sollte sich spätestens eine Stunde vor dem Workshop an der Teckids-Assembly im Digitalcourage-Habitat melden. Siehe auch [https://events.ccc.de/congress/2025/hub/de/project/detail/assembly/laptop-ausleihe-fur-junghackerinnen/](https://events.ccc.de/congress/2025/hub/de/project/detail/assembly/laptop-ausleihe-fur-junghackerinnen/) Wer ein eigenes Laptop benutzen möchte, benötigt ein Linux-System mit Thonny und Tiled. Wer nach den ersten 1,5 Stunden noch weiter machen möchte, kann [bei Teil 2 an der Teckids-Assembly]([https://events.ccc.de/congress/2025/hub/de/event/detail/spieleprogrammieren-mit-pygame-teil-2-tag-2](https://events.ccc.de/congress/2025/hub/de/event/detail/spieleprogrammieren-mit-pygame-teil-2-tag-2)) weitermachen. darius kenorca Natureshadow https://events.ccc.de/congress/2025/hub/event/detail/spieleprogrammieren-mit-pygame false 2025-12-28T11:45:00+01:00 11:45 01:00 Kidspace - Hackcenter 39c3-hour-of-code-programmieren-mit-minecraft-und-codeo de other Lust auf einen spielerischen Einstieg ins Programmieren? In dieser Hour of Code lernen Kinder (und interessierte Erwachsene) mit Minecraft die Grundlagen des Codings. Wir steuern Figuren, lösen knifflige Rätsel und entdecken, wie man mit einfachen Befehlen spannende Dinge erschaffen kann. Keine Vorkenntnisse nötig – einfach ausprobieren und Spaß haben! Lust auf einen spielerischen Einstieg ins Programmieren? In dieser Hour of Code lernen Kinder (und interessierte Erwachsene) mit Minecraft die Grundlagen des Codings. Wir steuern Figuren, lösen knifflige Rätsel und entdecken, wie man mit einfachen Befehlen spannende Dinge erschaffen kann. Keine Vorkenntnisse nötig – einfach ausprobieren und Spaß haben! Programmieren kann ganz leicht sein – besonders, wenn man es mit Minecraft verbindet! In dieser Session arbeiten wir mit der Minecraft-Hour of Code von Code.org. Mit einer einfachen, blockbasierten Programmierumgebung könnt ihr Charaktere steuern, Herausforderungen meistern und ganz nebenbei verstehen, wie Code funktioniert. Dieser Workshop richtet sich vor allem an Kinder, aber auch Erwachsene sind willkommen. Alles, was ihr braucht, ist Neugier und Lust, etwas Neues auszuprobieren! **Wichtig:** Es muss keine Software vorinstalliert werden. Ein moderner Browser reicht völlig. Damit ihr mitmachen könnt, braucht ihr jedoch ein internetfähiges Tablet oder einen Laptop. Bitte bringt euer eigenes Gerät mit! Vor Ort können leider keine Geräte gestellt werden. ghenny https://events.ccc.de/congress/2025/hub/event/detail/hour-of-code-programmieren-mit-minecraft-und-codeo false 2025-12-28T14:00:00+01:00 14:00 01:30 Kidspace - Hackcenter 39c3-luantiminetest-mods-programmieren_64tn de other Das freie Open-World-Spiel Luanti(Minetest) bietet viele Möglichkeiten, kreativ zu werden und zusammen zu spielen. Das Spielprinzip ist ähnlich zu Minecraft, dennoch ist Luanti ein ganz anderes Spiel und keineswegs ein nachgemachter Klon von Minecraft. Genau genommen ist Luanti ein Framework, also ein Baukasten, mit dem sich alle ihr eigenes Sandbox- oder Voxel-Game nach eigenen Vorstellungen zusammenbauen können. Wir lernen Luanti und seine Erweiterungsmöglichkeiten kennen und programmieren eine eigene Mod, die dem Spiel individuelle Items hinzufügt. Zudem ist es möglich, eigene Craftingrezepte zu erstellen, mit denen die neuen Blöcke, Items oder Werkzeuge hergestellt werden können. Je nach Interesse und Zeit werden weitere Bereiche, wie das Programmieren von Commands, eingebracht.Freund*innen spielen kann. Dabei gibt es kleinere Mods, die einzelne Elemente des Spiels verändern, aber auch ganze Games, die ein eigenes Spielprinzip mit sich bringen. [https://teckids.org/projekte/hack-n-fun/workshops/luanti/](https://teckids.org/projekte/hack-n-fun/workshops/luanti/) Wer sich ein Laptop für den Workshop ausleihen möchte, sollte sich spätestens eine Stunde vor dem Workshop an der Teckids-Assembly im Digitalcourage-Habitat melden. Siehe auch: [https://events.ccc.de/congress/2025/hub/de/project/detail/assembly/laptop-ausleihe-fur-junghackerinnen/](https://events.ccc.de/congress/2025/hub/de/project/detail/assembly/laptop-ausleihe-fur-junghackerinnen/) Wer ein eigenes Laptop benuten möchte, benötigt ein Linux-System mit Luanti ab Version 5.10. Und das Git-Repo: <https://edugit.org/Teckids/hacknfun/hack-n-next/luanti-mod-einstieg.git> Wer nach den ersten 1,5 Stunden noch weiter machen möchte, kann [bei Teil 2 an der Teckids-Assembly]([https://events.ccc.de/congress/2025/hub/de/event/detail/luanti-mods-minetest-programmieren-teil-2-tag-2](https://events.ccc.de/congress/2025/hub/de/event/detail/luanti-mods-minetest-programmieren-teil-2-tag-2)) weitermachen. kenorca darius Natureshadow https://events.ccc.de/congress/2025/hub/event/detail/luantiminetest-mods-programmieren_64tn false 2025-12-28T19:45:00+01:00 19:45 00:30 Kidspace - Hackcenter 39c3-logo-wir-sehen-kindernachrichten de other Wir schauen zusammen Logo! Sie waren da und filmten und versprachen. In der heutigen Sendung soll der Kidspace bei Logo! gezeigt werden. Kommt vorbei und wir prüfen gemeinsam, ob dies stimmt. elzbeth https://events.ccc.de/congress/2025/hub/event/detail/logo-wir-sehen-kindernachrichten false 2025-12-28T11:00:00+01:00 11:00 00:50 Bits&Bäume Workshop Area 39c3-handson-reusesoftware en Workshop 50 Minutes Developing, using, and re-using [Free Software](https://fsfe.org/freesoftware/index.en.html) is fun, but declaring licensing and copyright information is not. [REUSE](https://reuse.software/) changes that. With three simple steps, it makes declaring licensing and copyright information unambiguous and perfectly human- and machine-readable. This is an interactive workshop as an introduction to the REUSE project and demonstration of how to make a repository REUSE compliant. As software has gotten more complex over the last years, the importance of declaring licensing information has become even more crucial. The FSFE's REUSE initiative contributes to the goal of clearly displaying legal information in Free Software projects by embedding it into every file of the repository. Any project following the REUSE recommendations makes copyright and licensing information readable for both humans and machines. We ensure that individuals, organizations, and companies that are reusing code are aware of and respect the license terms chosen by its original author, thus making life easier for everyone involved in the software supply chain . REUSE integrates seamlessly into development processes and other best practices of indicating Free Software licenses. In addition, there are tools and documentation to help you get started. Tobias https://events.ccc.de/congress/2025/hub/event/detail/handson-reusesoftware https://pretalx.freifunktag.de/39c3-bub-workshops-2025/talk/KAQ8ZT/ true 2025-12-28T12:00:00+01:00 12:00 00:50 Bits&Bäume Workshop Area 39c3-einfuhrung-in-den-online-editor-id_aq8m de Workshop 50 Minutes In dieser Session wird euch der Online-Editor iD vorgestellt werden, mit dem ihr zu OpenStreetMap beitragen könnt. Während der Session könnt ihr Fragen zum Beitragen zu OpenStreetMap, dem Mappen, stellen. Um zu OpenStreetMap beizutragen, ist ein Benutzerkonto erforderlich. Gerne dürft ihr euch vor der Session ein OpenStreetMap-Konto anlegen, dazu benötigt ihr nur einen Benutzernamen und eine gültige E-Mail-Adresse. Nakaner https://events.ccc.de/congress/2025/hub/event/detail/einfuhrung-in-den-online-editor-id_aq8m https://pretalx.freifunktag.de/39c3-bub-workshops-2025/talk/MRPVWV/ false 2025-12-28T14:00:00+01:00 14:00 01:50 Bits&Bäume Workshop Area 39c3-community-data-centers-a-workshop_ifp6 en Workshop 110 Minutes What if local communities operated their own data centres? How might that look and function? To what extent would it be democratic and sustainable? Who would (not) benefit from it? In this workshop, we would like to think through, examine and discuss alternative models for the ownership and management of collective data centres. We will take a structured look at fundamental concepts, governance issues and implications, as well as discuss parallel ideas in other areas (cooperative banks or housing, community-supported agriculture) in the hope of initiating a broad discussion about alternatives to the profit and exploitation logic of the current data centre industry. Similar approaches to data centers that already exist include Nubo (Belgium), Espora (Mexico) and Wobcom (Germany). Rainer Rehak Nicolas Tara Merk https://events.ccc.de/congress/2025/hub/event/detail/community-data-centers-a-workshop_ifp6 https://pretalx.freifunktag.de/39c3-bub-workshops-2025/talk/HB9EBD/ false 2025-12-28T16:00:00+01:00 16:00 00:50 Bits&Bäume Workshop Area 39c3-whats-happening-with-xslt_o6lt en Workshop 50 Minutes You may have heard of XSLT or maybe worked with it in the Past. A more recent development is the effort to remove XSLT from the web platform altogether... and yes, it is in your browser, too! But did you know that this family of Languages - it not only includes XSLT but also XPath and XQuery - is still very important in the digital humanities and other niches near you? Would you be surprised to learn that there is an effort to specify the next version 4? Last year, I joined the QT4 Community Group that is working on that. Come by if you are interested in hearing where we are headed or just to indulge in the drama about OppenSource maintenance, W3C politics, and why XML is still around even though JSON and YAML are so much simpler! https://pretalx.freifunktag.de/media/39c3-bub-workshops-2025/submissions/DCS8LH/QT4_shaded-0-RMX_UmoToW3.svg Juri —〇 Leino https://events.ccc.de/congress/2025/hub/event/detail/whats-happening-with-xslt_o6lt https://pretalx.freifunktag.de/39c3-bub-workshops-2025/talk/DCS8LH/ false 2025-12-28T17:00:00+01:00 17:00 00:50 Bits&Bäume Workshop Area 39c3-repair-for-future_odrf de Meetup 50 Minutes Meetup für die Reparatur-Community mit Updates zum Recht auf Reparatur und anschließender Diskussion * Meetup für alle, die sich in einer Reparaturinitiative engagieren (möchten) * Kurzer Lagebericht zu den neuesten Entwicklungen beim Recht auf Reparatur * Diskussion über Synergien zwischen lokalen Repair-Cafés und Make/Hack-Spaces * Fröhliches Rumgenerde über eure wildesten Reparaturerfahrungen https://pretalx.freifunktag.de/media/39c3-bub-workshops-2025/submissions/N9FSUW/Bildschirmfoto_20251223_134311_Ih842RS.png Fraxinas https://events.ccc.de/congress/2025/hub/event/detail/repair-for-future_odrf https://pretalx.freifunktag.de/39c3-bub-workshops-2025/talk/N9FSUW/ false 2025-12-28T18:00:00+01:00 18:00 00:50 Bits&Bäume Workshop Area 39c3-political-organizing-tools-we-need en Meetup 50 Minutes In our struggles for a better world, we need the right tools to organize collectively. Common solutions seldom align with our ideals of self-organization and freedom from hierarchy. But what tools work in contexts with activists who have little technical experience? And what is our role as hackers in these groups? We see the same challenges in other organizations building up counterpower through structure based organizing as well. So let's connect! We are tenants organizing ourselves in the Berlin Tenants Union to fight for better housing conditions. In our organization, we have some active members that need to plan, coordinate and document actions. At the same time, we are constantly growing with new members who have little experience in collective struggles. Onboarding them shouldn’t bring a steep learning curve, but rather empower people to participate right-away. So we need tools that require only a low level of technical expertise to get started. Yet we’re facing a gap between our values (data sovereignty, open source, collective ownership) and our reality (onboarding friction, technical barriers, competing with Big Tech UX). But we are the advanced users in the technical sphere. So where do less technical users face difficulties so that they choose tools that don't align with our values? And are we mere facilitators or also educators in these spaces? That’s why we would like to exchange with like-minded people. So let's connect and talk about the toolbox we want! Some questions we would like to discuss: - How can information and shared knowledge made accessible for new members? - How can events be communicated and how can we mobilize for specific actions? - Where should we store contact information from the people we organize? - How can we keep track of active members? - And what is our position as hackers in all of that? https://pretalx.freifunktag.de/media/39c3-bub-workshops-2025/submissions/ZS9FDW/1024-550_s7MkgmV.png Berliner Mieter*innengewerkschaft https://events.ccc.de/congress/2025/hub/event/detail/political-organizing-tools-we-need https://pretalx.freifunktag.de/39c3-bub-workshops-2025/talk/ZS9FDW/ true 2025-12-28T19:00:00+01:00 19:00 02:00 Bits&Bäume Workshop Area 39c3-dn42freifunk-multicast-routingpeering-worksho_m0ab en Workshop 110 Minutes Let's start to make our hackspaces and community networks multicast interconnected! Multicast allows to send information, for example audio or video streams, sensor data or service discovery messages, to many interested recipients with minimal overhead, without the need of a central, beefy server. A perfect fit with a decentral network like [dn42](https://dn42.dev/) or [Freifunk](https://freifunk.net/)? The fundamental standards for multicast aren't new but usable, "bugfree" implementations have been rare in the past. And multicast is typically not available on common consumer internet connections. The former has changed though, great progress was made in OpenSource software, including Freifunk firmwares and mesh routing protocols, in recent years. Allowing us to experiment with this and potentially making it available to and from a wider, public, distributed audience and providers. To really unfold the potential of multicast and to tackle the chicken & egg problem it will be crucial to establish a multicast topology with a wide reach. So let's start with making our hackspaces and community networks multicast interconnected! --- This session will kick off with a small presentation on IPv6 multicast routing. Followed by a practical, hands-on workshop to set up IPv6 multicast peerings based on PIM-SD ([RFC7761](https://www.rfc-editor.org/rfc/rfc7761)) over dn42. While the presented tooling will focus on [bird](https://bird.network.cz/) with a dedicated [BGP](https://en.wikipedia.org/wiki/Border_Gateway_Protocol) multicast channel + [pim6sd](https://github.com/troglobit/pim6sd) experimentation and discussion on other tools (maybe [FRR](https://frrouting.org/)?) and approaches will be highly encouraged. Prerequisites: For the workshop part you should have a dn42 node or other BGP enabled router set up and connected beforehand and should have some experience with IPv6 unicast routing. Also feel free to stop by in the [#dn42-multicast](https://events.ccc.de/congress/2025/hub/tag/dn42-multicast) IRC channel on [HackInt](https://hackint.org/) in advance. Having some more "beta testers" and potential people to onboard others during the session would be appreciated :-). If you are a commercial ISP or research institute with potential multicast peering opportunities for our community networks then we would also be very interested to hear from you. Linus Lüssing https://events.ccc.de/congress/2025/hub/event/detail/dn42freifunk-multicast-routingpeering-worksho_m0ab https://pretalx.freifunktag.de/39c3-bub-workshops-2025/talk/GGVFEK/ false 2025-12-28T12:00:00+01:00 12:00 02:00 Call for Art: raumzeit 39c3-warum-ist-die-raumzeit-krumm de, en other **_Takes place in the entrance hall next to the welcome desk. [→ c3nav-Link ←](https://39c3.c3nav.de/l/c:0:237.95:198.54/)_** **Artist: Raumzeit Kollektiv** **Genre: interactive Installation** In our performative exhibition “Why is space-time curved?”, visitors can immerse themselves in an artistic journey through questions of physics. Artists Miriam Ebbig, Steff Hörmanseder, and Ilona Klein have collaborated with physicist Luz Lea Richtmann to interpret physical questions artistically. Come by and explore the resulting exhibits from the fields of music, projection, installation, and video art. You can decide for yourself how you want to move through the exhibition, whether you want to explore details, let yourself drift through, or read up on exciting background information. If there are physics questions that have been on your mind for a long time but you've been unsure or shy about asking, come to the Physics Cabinet! Here you can ask physicists your questions without being seen. There is also a station where you can creatively express your own inspirations and new questions or answers. **day 1 - 3 performative physics - cabinet; polylux show 12:00 - 2:00 pm 5:00 - 7:00 pm** Picture: Warum ist die Raumzeit krumm? ©QuantumFrontiers | Sofie Puttfarken https://events.ccc.de/congress/2025/hub/https://usercontent.events.ccc.de/congress/2025/hub/usercontent/e/f02477d6f022/raumzeit_4096-2731-max.jpg artnplay https://events.ccc.de/congress/2025/hub/event/detail/warum-ist-die-raumzeit-krumm false 2025-12-28T17:00:00+01:00 17:00 02:00 Call for Art: raumzeit 39c3-warum-ist-die-raumzeit-krumm_zxpr de, en other **_Takes place in the entrance hall next to the welcome desk. [→ c3nav-Link ←](https://39c3.c3nav.de/l/c:0:237.95:198.54/)_** **Artist: Raumzeit Kollektiv** **Genre: interactive Installation** In our performative exhibition “Why is space-time curved?”, visitors can immerse themselves in an artistic journey through questions of physics. Artists Miriam Ebbig, Steff Hörmanseder, and Ilona Klein have collaborated with physicist Luz Lea Richtmann to interpret physical questions artistically. Come by and explore the resulting exhibits from the fields of music, projection, installation, and video art. You can decide for yourself how you want to move through the exhibition, whether you want to explore details, let yourself drift through, or read up on exciting background information. If there are physics questions that have been on your mind for a long time but you've been unsure or shy about asking, come to the Physics Cabinet! Here you can ask physicists your questions without being seen. There is also a station where you can creatively express your own inspirations and new questions or answers. **day 1 - 3 performative physics - cabinet; polylux show 12:00 - 2:00 pm 5:00 - 7:00 pm** Picture: Warum ist die Raumzeit krumm? ©QuantumFrontiers | Sofie Puttfarken https://events.ccc.de/congress/2025/hub/https://usercontent.events.ccc.de/congress/2025/hub/usercontent/e/2a9417fd84f4/raumzeit_4096-2731-max.jpg artnplay https://events.ccc.de/congress/2025/hub/event/detail/warum-ist-die-raumzeit-krumm_zxpr false 2025-12-28T15:00:00+01:00 15:00 09:00 callforart_moorweide 39c3-der-schatz-an-der-moorweide de, en other _Starts next to the ball pit between Saal 4 and the cloakroom. [→ c3nav-Link ←](https://39c3.c3nav.de/l/c:0:179.55:184.69/)_ **Artist: Sportforum** **Genre: enigmatic and interactive audio mystery game** An enigmatic and interactive audio scavenger hunt that entices participants to leave the convention center for a while and explore the surrounding area. Our game “Der Schatz an der Moorweide” (The Treasure at Moorweide) sheds light (in the beam of a flashlight trembling with excitement and mystery) on the secrets of a historic place “at the gates of the city.” It is a story about greed, repression, and experiences of marginalization. Duration: approximately 1 hour. You can play alone or in a small group. You will need: 1. An internet-enabled cell phone with headphones. 2. A keen nose and a desire for (gentle) horror. 3. Your jacket, because you'll be going outside. ### Timetable: DAY 1: 14:00 - 22:00 DAY 2: 15:00 - 24:00 DAY 3: 15:00 - 24:00 DAY 4: 11:00 - 16:00 starting point: www.schatzandermoorweide.de Picture: Der Schatz der Moorweide ©Wanja Neite https://events.ccc.de/congress/2025/hub/https://usercontent.events.ccc.de/congress/2025/hub/usercontent/e/c82824d4f24b/moorweide_480-640-max.jpg artnplay https://events.ccc.de/congress/2025/hub/event/detail/der-schatz-an-der-moorweide false 2025-12-28T15:30:00+01:00 15:30 01:30 callforart 39c3-1965-60-jahre-algorithmisches-zeichnen-mit-compute de, en other **_Takes place in the Foyer, between the Angel Registration Desk and the Cloakroom. [→ c3nav-Link ←](https://39c3.c3nav.de/l/c:0:217.56:176.66/)_** **Artist: Enna Gerhard** **Genre: Exhibition + Workshop** In 1965, something new happened: Artworks were on public display that were created with the help of a computer. These exhibitions of  Georg Nees, A. Michael Noll with Béla Julesz and Frieder Nake with Georg Nees took place in Stuttgart and New York. We looked into different techniques of algorithmic drawing. From hommages to our own ideas, we created several works – sixty years after the first exhibitions. You can find some of these works on the walls of the CCH. Additionally, we want to give several interactive workshops. Here, you can experiment on your own drawings and take them home. Times: * DAY 1: 15:00 - 16:30 * DAY 2: 15:30 - 17:00 * DAY 3: 16:30 - 18:00 * DAY 4: 12:30 - 14:00 artnplay https://events.ccc.de/congress/2025/hub/event/detail/1965-60-jahre-algorithmisches-zeichnen-mit-compute false 2025-12-28T16:00:00+01:00 16:00 04:00 callforart_care 39c3-careexe-has-stopped-responding de, en other **_Takes place under the round glass elevator next to Saal 3. [→ c3nav-Link ←](https://39c3.c3nav.de/l/c:0:75.55:146.79/)_** **Artist: Katharina Brunnmayr** **Genre: Roleplay** TIMES: * DAY 1: 14:00 - 16:00 * DAY 2: 16:00 - 20:00 * DAY 3: 20:00 - 22:00 * DAY 4: 10:00 - 12:00 What does the future of care look like? What technologies do we want to have available when we get old? Should it really be a care robot looking after us when we're elderly? Explore these questions with the help of a role-playing game and develop an idea for a care technology of the future! artnplay https://events.ccc.de/congress/2025/hub/event/detail/careexe-has-stopped-responding false 2025-12-28T10:00:00+01:00 10:00 02:30 Hardware Hacking Area -- Front-middle 39c3-39c3-led-badge-smd-for-beginners-day-2 en other **39C3 LED badge -- SMD for Beginners** https://github.com/hackwinkel/39C3LEDbadge The 39C3 LED badge contains 42 LEDs that blink under control of of a pre-programmed 4 cent microcontroller. When the badge is alone, the LEDs will blink randomly. When it is among friends (when there are other badges nearby), it will display a chaser pattern. In this workshop you will learn how to solder Surface Mounted Devices using a normal soldering iron. Suitable for beginners. Under 16s only with responsible adult supervision. ### 39C3 LED badge -- SMD for Beginners  Surface Mounted Devices (SMDs) are small compared to Through Hole (TH) electronic components, and have the reputation of being difficult to work with as a hobyist: Difficult to see and handle, when you sneeze, you loose them and you can not easily use them on 2.54mm raster prototyping boards. SMD components are designed to be used in a reflow soldering process where tiny dots of solder paste are applied to a Printed Circuit Board (PCB), after which the SMD components are "Picked and Placed" on the PCB, after which the whole PCB is heated to the melting point of the solder ("reflowing"), actually completing the electrical connections. This workshop is aimed at showing you that the reputation of being difficult to work with is a bit undeserved, and that you can also work with SMDs using just a regular soldering iron: With some simple tricks and a suitable selection of components (not the smallest possible), the vast majority of people can successfully complete this project. Being able to solder SMD projects using just a simple soldering iron will also help you develop some skills that are useful if you need to do "rework" on reflow soldering projects. Reflow soldering is also not difficult to do as a hobbyist, but requires a few more tools like a stencil to apply solder paste and either an oven or a hot plate to do the reflowing. It is, however, much quicker than soldering the parts one by one, and can yield more professional looking, cleaner, solder joints. The project is an electronic name-badge - You should write your name (or nick) on it and wear it. It contains 42 LEDs, a microcontroller, some support components and an InfraRed transmitter and receiver that allow it to communicate with other badges. When the badge detects the presence of other badges ("friends") nearby, it will change its behaviour. It will not only interact with other 39C3 LED badges, but also with TBD badges - come visit the TBD assembly at komona or https://tbd.camp  ### Costs This workshop is donation based. Materials costs are 2 euro per badge. Donations will go towards 1) covering costs of the badges, 2) covering costs of running the hardware hacking area in general, 3) covering costs of organizing TBD (see the TBD assembly at komona or https://tbd.camp) ### Registration The number of participants per session is limited. First come, first served. Either get a participation voucher beforehand or show up early (there may be places left). There will be *numbered* paper vouchers available for each session some time in advance of each session. If you get a voucher and do not show up *before* the designated starting time, someone else may take your spot. Please don't take multiple vouchers and don't take vouchers if you don't actually plan to participate. ### Getting a kit Kits are part of the workshop and not for sale separately. You can, however easily source your own PCBs and parts and make kits yourself because the design is MIT licensed open source. ### Links https://github.com/hackwinkel/39C3LEDbadge Mitch (he/him) the0 (he his him) https://events.ccc.de/congress/2025/hub/event/detail/39c3-led-badge-smd-for-beginners-day-2 false 2025-12-28T10:00:00+01:00 10:00 01:30 Hardware Hacking Area -- Rear 39c3-solder-your-own-meshtastic-meshcore-node en other Solder Your Own Meshtastic / Meshcore Node **Solder Your Own Meshtastic / Meshcore Node** **Materials costs**: €130 **Taught by** Retia / Kody. **Workshop Itinerary**: Anyone can build their own off-grid mesh communication from scratch! This beginner soldering class teaches you how to build your own full-featured LoRa mesh node from scratch. We will guide you through basic through-hole and surface-mount soldering techniques to build a custom, cat-shaped node! By the end, you'll have a fully functional node you built with your own hands, capable of running Meshtastic or Meshcore. **Note: This is a hardware assembly class; advanced software configuration is covered in the Meshcore classes.** **Registration**: Buy a kit at the Hardware Hacking Area or website to guarantee a seat, or come by early! (And please do arrive early, regardless!) First come, first served. **Workshop Includes**: Nibble Connect Unsoldered Kit https://events.ccc.de/congress/2025/hub/https://usercontent.events.ccc.de/congress/2025/hub/usercontent/e/b9fd38e1fb8d/signal-2025-12-22-212237.jpeg skickar Hoid (he/him) https://events.ccc.de/congress/2025/hub/event/detail/solder-your-own-meshtastic-meshcore-node false 2025-12-28T12:00:00+01:00 12:00 02:00 Hardware Hacking Area -- Rear 39c3-meshcore-meshtastic-for-hackers-set-up-configure-d en other Meshcore & Meshtastic for Hackers: Set up, Configure, & Deploy Nodes for Advanced Use **Meshcore & Meshtastic for Hackers: Set up, Configure, & Deploy Nodes for Advanced Use** **Materials costs**: €140 **Taught by** Retia / Kody. **Workshop Itinerary**: Meshcore is the future! Worldwide, Meshcore is overtaking Meshtastic as the regional LoRa mesh net of choice. Unlike Meshtastic, Meshcore scales well and supports reliable direct messaging. Meshcore is optimized for hackers, developers, or beginners who want deeper control. We will dive into Meshcore differences, setup and customization, and how to utilize the Nibble’s Flipper-Zero compatible expansion ports for sensors and peripherals. **Registration**: Buy a kit at the Hardware Hacking Area to guarantee a seat, or come by early! (And please do arrive early, regardless!) First come, first served. **Workshop Includes**: New Nibble Zero https://events.ccc.de/congress/2025/hub/https://usercontent.events.ccc.de/congress/2025/hub/usercontent/e/4b95c7b0f4d8/signal-2025-12-23-193626.jpeg skickar koufax https://events.ccc.de/congress/2025/hub/event/detail/meshcore-meshtastic-for-hackers-set-up-configure-d false 2025-12-28T14:30:00+01:00 14:30 03:00 Hardware Hacking Area -- Rear 39c3-trigg-build-an-openhardware-portable-handheld-game en other Trigg - Build an Open-Hardware Portable Handheld Games Console **Trigg - Build an Open-Hardware Portable Handheld Games Console** **Materials costs**: €45 **Taught by** fablab|nk. **Workshop Itinerary**: In this 3-hour workshop you will build your own Trigg: an open-hardware portable handheld games console which runs tile-based games that can be coded and uploaded directly from the browser. Check out the PDF build guide here: https://github.com/fablabnk/TriggWorkshop/blob/main/TriggBuildGuide.pdf Trigg is our version of the Hack Club Sprig, which we adapted into a through-hole soldering kit in the FabLab of our coding school 42 Berlin, to teach soldering and basic electronics to coding students. Kits include a Raspberry Pi Pico (RP2040) and all components (batteries and USB cable not included). Our workshop and build guide will take you from the basics of soldering through to assembling, soldering, flashing and testing your Trigg, increasing your confidence as you go. After building, come by to our assembly to code and flash your first game. Parent-child building teams are also very welcome. **Registration**: Buy a kit at the Hardware Hacking Area to guarantee a seat, or come by early! (And please do arrive early, regardless!) First come, first served. **Links**: [https://github.com/fablabnk/TriggWorkshop](https://github.com/fablabnk/TriggWorkshop) [https://github.com/fablabnk/TriggWorkshop/blob/main/TriggBuildGuide.pdf](https://github.com/fablabnk/TriggWorkshop/blob/main/TriggBuildGuide.pdf) [https://sprig.hackclub.com/](https://sprig.hackclub.com/) https://events.ccc.de/congress/2025/hub/https://usercontent.events.ccc.de/congress/2025/hub/usercontent/e/e27807fe88bd/image1.png https://events.ccc.de/congress/2025/hub/event/detail/trigg-build-an-openhardware-portable-handheld-game false 2025-12-28T18:00:00+01:00 18:00 02:00 Hardware Hacking Area -- Rear 39c3-noisio-levitation-osc-drone-synthesizer en, de other With its 10 oscillators, the Levitation OSC produces spherical sounds and beats down to the very deepest sub-bass range. Sine and sawtooth are available as waveforms in a wide frequency range. In addition to additive synthesis, there are optional noisio-typical 8-bit register overflows for sound calculation and a one button random chime generator. **noisio Levitation OSC Drone Synthesizer** **Materials costs**: €20 - €50 **Taught by** noisio. **Workshop Itinerary**: Solder yourself a synth from easy to peasy. This workshop will focus on the Levitation OSC, but other noisio synths can be build in parallel. No previous solder experiences are necessary. **Registration**: Buy a kit in the hours before the workshop at the Hardware Hacking Area to guarantee a seat, or come by early! (And please do arrive early, regardless!) First come, first served. **Links**: https://noisio.de/boards/levitation-oscillator https://events.ccc.de/congress/2025/hub/https://usercontent.events.ccc.de/congress/2025/hub/usercontent/e/9390da1dc9de/P1010052.jpg Mitch (he/him) https://events.ccc.de/congress/2025/hub/event/detail/noisio-levitation-osc-drone-synthesizer false 2025-12-28T20:30:00+01:00 20:30 02:00 Hardware Hacking Area -- Rear 39c3-alwincircuitcircle-supaloopa-screamo en, de other Alwin/CircuitCircle SupaLoopa & Screamo **Alwin/CircuitCircle SupaLoopa & Screamo** **Materials costs**: €30 - €60 **Taught by** Alwin / CircuitCircle. **Workshop Itinerary**: **Registration**: Buy a kit at the Hardware Hacking Area to guarantee a seat, or come by early! (And please do arrive early, regardless!) First come, first served. **Links**: Mitch (he/him) https://events.ccc.de/congress/2025/hub/event/detail/alwincircuitcircle-supaloopa-screamo false 2025-12-28T23:00:00+01:00 23:00 01:30 Hardware Hacking Area -- Rear 39c3-catware-python-playground en other Catware Python Sensor Playground **Catware Python Sensor Playground** **Materials costs**: €120 **Taught by** Retia / Arya. **Workshop Itinerary**: Join us for a late-night coding session! We will be using the USB Nugget to explore sensors with CircuitPython. This is a "playground" style class where beginners will learn to write easy Python scripts to interact with hardware buttons, buzzers, LEDs, Lora radios, and more! Whether you want to write a game, a remote control, or a utility, this is the place for beginners to learn Python on microcontrollers. **Registration**: Buy a kit at the Hardware Hacking Area or on the website to guarantee a seat, or come by early! (And please do arrive early, regardless!) First come, first served. https://events.ccc.de/congress/2025/hub/https://usercontent.events.ccc.de/congress/2025/hub/usercontent/e/e573ff9fabd9/signal-2025-12-23-120807.jpg Mitch (he/him) https://events.ccc.de/congress/2025/hub/event/detail/catware-python-playground false 2025-12-28T10:00:00+01:00 10:00 02:30 Hardware Hacking Area -- Front 39c3-surface-mount-electronics-assembly-for-terrified-b en, de other Surface Mount Electronics Assembly for Terrified Beginners Unfortunately this event is cancelled https://events.ccc.de/congress/2025/hub/event/detail/surface-mount-electronics-assembly-for-terrified-b false 2025-12-28T13:30:00+01:00 13:30 03:30 Hardware Hacking Area -- Front 39c3-arduino-for-total-newbies-workshop en other Learn Arduino using TV-B-Gone as an example project. You've probably heard lots about Arduino. But if you don't know what it is, or how you can use it to do all sorts of cool things, then this fun and easy workshop is for you. As an example project, we'll be creating a TV-B-Gone remote control out of an Arduino you can take home with you. **[Arduino](http://arduino.cc/)** is an amazingly powerful tool that is very simple to learn to use. It was designed so that artists and non-geeks can start from nothing, and make something cool happen in less than 90 minutes. Yet, it is powerful enough so that experienced expert geeks can use it for their projects as well. This workshop is easy enough for _**total newbies**_ to **learn all you need to know to get going on an Arduino.** Participants will make their own Arduino clone, and set it up on solderless breadboards to make their own [TV-B-Gone](http://www.tvbgone.com) remote control to turn off TVs in public places -- a fun way to learn Arduino (and electronics) basics. **Materials costs**: The workshop is free, but if you would like to partake in the hands-on aspects of the workshop, Mitch will have materials for **€40** (useful for making many different cool projects). **Taught by** [Mitch Altman](http://en.wikipedia.org/wiki/Mitch_Altman). _**Optional**: Bring your laptop if you want to go home with the free Arduino software installed on it. Arduino software runs on Windows, MacOS and Linux._ **Workshop page:** [Arduino For Total Newbies workshop page](http://cornfieldelectronics.com/cfe/projects/tvbg_arduino/tvbg_arduino_workshop.php) **Workshop Itinerary**: * Intro to Arduino * Very short lesson to learn everything you need to know about electronics! * Then we will learn to solder. Don't let this scare you! I've taught tens of thousands of people to solder, most of whom have never made anything before in their lives. It is actually a very easy skill to learn. It is also very useful. * Then we will each make our own Arduino clone from a kit. * Now that we each have our own Arduino board, we will set up the free and open-source *Arduino software* on our laptops (if you bring one) -- Windows, Linux, and MacOS are all fine! * And then its time to make something and learn how easy it is to use Arduino! I'll (very easily!) show you how to read schematic diagrams, and you'll put together your own TV-B-Gone remote control using your Arduino clone board. We will use a solderless breadboard. These are really useful, and provide a fast, and very easy way to put circuits together without needing to solder. * Target practice is available all over the world after the workshop. **Registration**: Buy a kit at the Hardware Hacking Area to guarantee a seat, or come by early! (And please do arrive early, regardless!) First come, first served. **Links**: [Arduino For Total Newbies workshop webpage](http://cornfieldelectronics.com/cfe/projects/tvbg_arduino/tvbg_arduino_workshop.php) [Ardiuno software download](https://www.arduino.cc/en/software/) https://events.ccc.de/congress/2025/hub/https://usercontent.events.ccc.de/congress/2025/hub/usercontent/e/b59a25ed000c/arduino-for-total-newbies-workshop.banner.jpg https://events.ccc.de/congress/2025/hub/event/detail/arduino-for-total-newbies-workshop false 2025-12-28T18:00:00+01:00 18:00 02:00 Hardware Hacking Area -- Front 39c3-iot-with-arduino-cloud-beginner-friendly-workshop en other A hands-on introduction to IoT using Arduino Cloud. You’ll solder and wire sensors, program an ESP32, connect it to WiFi, and build a simple online dashboard to view live temperature, humidity, and air pressure data. # IoT with Arduino Cloud: Beginner-Friendly Workshop Join us for a 2-hour, hands-on workshop that introduces you to the Internet of Things (IoT) using Arduino Cloud. This beginner-friendly session will show you how to connect a device to WiFi, visualise sensor data in real time, and manage your device remotely. ## Arduino Cloud [Arduino Cloud](https://cloud.arduino.cc/) is an online platform for connecting compatible boards to the Internet, building dashboards, and viewing your sensor data from anywhere. You’ll use it to get an ESP32 online and streaming live environmental readings. ## What You’ll Learn During the workshop, you’ll solder, wire, and program sensors on an ESP32. You’ll connect your device to Arduino Cloud, set up a simple dashboard, and monitor temperature, humidity, and air pressure online. You’ll also display readings locally on a small screen. ## Materials You’ll work with: - Two ESP32 boards - A BME280 sensor for temperature, humidity, and air pressure - A small screen to display data locally ## Requirements - A laptop - Install the [Arduino Cloud Agent](https://cloud.arduino.cc/download-agent/) - A USB-C data cable (limited number available to buy on the day) - No previous experience required, beginner-friendly ## Materials Costs It costs **€25** for a kit to take home. ## Instructions [Link to slides](https://docs.google.com/presentation/d/1wtO9P6p4a-CL3omzcWdf-vDEWegklzHMaalzUt9Qii8/edit?usp=sharing) ## Facilitator Taught by [Jeffrey Roe](https://chaos.social/@tdr112). **Buy a kit at the Hardware Hacking Area to guarantee a seat, or come by early. Please do arrive early, regardless.** https://events.ccc.de/congress/2025/hub/https://usercontent.events.ccc.de/congress/2025/hub/usercontent/e/fbe9727b1ca3/ArduinoIOT.jpg tdr112 (he/him) https://events.ccc.de/congress/2025/hub/event/detail/iot-with-arduino-cloud-beginner-friendly-workshop false 2025-12-28T20:30:00+01:00 20:30 02:00 Hardware Hacking Area -- Front 39c3-emf-explorer-badge-electromagnetic-discorvery_wakl en other Ever wonder about the invisible world of electromagnetic fields around you? In this beginner-friendly hands-on workshop, you’ll build your own EMF Explorer Badge from a kit, learn about different electromagnetic frequency bands, and walk away ready to explore the unseen frequencies that surround our daily lives. ### EMF Explorer Badge Soldering Workshop In this hands-on build-and-explore workshop, participants assemble their own **[EMF Explorer Badge](https://emfexplorer.space)** using guided soldering instruction, learn the science of electromagnetic frequency bands, and plug in headphones to *listen* to the invisible world around them. Every participant takes home their own exploration kit: badge + headphones, ready for EMF exploring with an illuminated badge that can be used at night for visibility and bling. --- ##### Material Costs €20 - €30 --- ##### Workshop Itinerary - **Welcome + Electronics and Soldering Info** We will show you how to solder. Anyone who can safely hold a soldering iron can do it! It is actually a very easy skill to learn. It is also very useful. - **EMF Explanation and Badge Creation Overview** Learn about what EMF is, where it comes from, and how the badge works. - **Badge Assembly** Get to soldering! We will be available to help you along the way. - **Check your work, and power up your badge!** - **Wrap-Up + Q&A** - **Live Exploration!** You are surrounded by interesting electronics at 39C3. Go exploring! What new sounds do you hear? Some of the most unassuming electronics can make the most interesting sounds. --- ##### Registration Info Buy a kit at the Hardware Hacking Area to guarantee a seat, or come by early! (And please do arrive early, regardless!) First-come, first-served. - **Age:** anyone who can safely hold a soldering iron - **Experience level:** No prior soldering experience required - **Take-home:** Your assembled badge + headphones included --- ##### Links [EmfExplorer.Space](https://emfexplorer.space) --- ##### Instructor Notes This is a **beginner-first hardware workshop**. The goal is skill building, curiosity, and real-world electronics exploration. The badge is both a tool and a conversation piece: it senses EMF, plays it through audio, and glows for visibility and bling. --- ##### Taught by **[Drc3p0](https://links.darcyneal.com)** Drc3p0 (they/them) https://events.ccc.de/congress/2025/hub/event/detail/emf-explorer-badge-electromagnetic-discorvery_wakl false 2025-12-28T23:00:00+01:00 23:00 01:30 Hardware Hacking Area -- Front 39c3-led-strips-everywhere-for-everyone-workshop en other Learn how to program LED strips. It's super easy and fun to make your life trippy and beautiful. For total beginners. Learn how to light up LED strips with a cheap Arduino, and make your life trippy and beautiful! For total beginners -- no knowledge needed at all. LED strips have become really inexpensive. And many people have created easy methods of controlling the color and brightness of individual LEDs in LED strips. This workshop will show you one easy and fun way to control LED strips, and to make them do what you want. I'll show you everything you need to know to use existing Arduino programs -- and how to hack Arduino programs -- to control the colors in your world with LED strips. **Materials costs**: The workshop is free, but if you would like to partake in the hands-on aspects of the workshop, Mitch will have materials for **€20**. **Taught by** [Mitch Altman](http://en.wikipedia.org/wiki/Mitch_Altman). _**Optional**: Bring your laptop if you want to go home with the free Arduino software installed on it. Arduino software runs on Windows, MacOS and Linux._ [Arduino software](https://www.arduino.cc/en/Main/Software) **Workshop Itinerary**: * Intro to Red-Green-Blue (RGB) LEDs * Brief intro to Arduino * How to use an Arduino to control an LED strip * Some demos of programs you can download **Registration**: Buy a kit at the Hardware Hacking Area to guarantee a seat, or come by early! (And please do arrive early, regardless!) First come, first served. **Links**: [LED Strips Everywhere for Everyone! workshop webpage](https://cornfieldelectronics.com/cfe/projects.php#ledstrips) [Ardiuno software download](https://www.arduino.cc/en/software/) https://events.ccc.de/congress/2025/hub/https://usercontent.events.ccc.de/congress/2025/hub/usercontent/e/f20dbf8dfaa7/led-strips-everywhere-for-everyone-workshop.banner.jpg https://events.ccc.de/congress/2025/hub/event/detail/led-strips-everywhere-for-everyone-workshop false 2025-12-28T14:00:00+01:00 14:00 02:00 Food Hacking Base 39c3-kimchi-making en other [To secure spot on this workshop please sign in here.](https://dud-poll.inf.tu-dresden.de/kimchi_39c3/) - max 25 [Workshop manual is shared here.](https://foodhackingbase.org/wiki/Recipe:Traditional_Kimchi_making_manual) This is hands on workshop where your learn how to prepare Korean 김치 (kimchi). You will do at least two types of kimchies based on wild/spontaneous fermentation. We will see what type of nice vegetables we will get. Highly likely we will do cabbage kimchi (배추 김치) and then either radish, topinambur or turnip kimchi. The preparation of vegetable ferments in Korea, called “kimchies”, is an ancient fermentation skill based on spontaneous fermentation (naturally occurring lactic acid producing bacteria among the others) and variety of ingredients added. This workshop is a hands-on experience that reviews the basics of Korean kimchi making and today's preparation styles. We will go through the main topics which are salt to vegetables and liquid ratio and when to apply it and how. This one is crucial. We will explain the importance of the effect of ginger, garlic and spicy pepper and their roles in preventing unwanted microbial development. Part of this workshop is tasting of kimchi samples so you get idea what should your results taste like. You will be leaving with jar of kimchi and knowledge how to make your own. This workshop is based on "donation at your will no one turned away for lack of funds". Part of the workshop benefits goes towards fhb budget and hopefully larger part towards Algoldor's pocket to cover participation costs at 39c3 event and if some extras are accumulated, then towards current and future fermentation projects. ingo https://events.ccc.de/congress/2025/hub/event/detail/kimchi-making false 2025-12-28T20:30:00+01:00 20:30 02:00 Food Hacking Base 39c3-whiskey-tasting en other We provide a number of interesting whiskeys to show you the wide range of things the world calls whiskey, and give you some insight in what makes it get its characteristic tastes. You are invited to bring your own bottle to this event to make it even more insane. If you let us know in advance, we'll add them to this list. Signing list is available on foodhacking base A list of whiskeys will be published after the event here [Whiskey tasting [@FHB](https://events.ccc.de/congress/2025/hub/user/FHB) site](https://foodhackingbase.org/wiki/39C3_Whisky_Tasting) https://events.ccc.de/congress/2025/hub/event/detail/whiskey-tasting false 2025-12-28T18:00:00+01:00 18:00 06:00 Hardware Hacking Area -- Rear-middle 39c3-tictaclights-nano-colour-reflow-soldering en, de other We will solder, test and debug the TicTacLights Nano Colour kits together using reflow soldering (solder paste and hot plate & hot air). ## Materials costs 45.— € ## Taught by [Arne](https://events.ccc.de/congress/2025/hub/en/user/arne) ## Workshop Itinerary We will assemble and solder the [TicTacLights Nano Colour](https://wiki.blinkenarea.org/index.php/TicTacLightsNanoColourEnglish) kit together. No prior knowledge of reflow soldering is required, but a steady hand (go easy on caffeine!) and good eyes are useful. **The steps we'll go through are:** 1. Apply solder paste to the front board with a stencil 2. Place the 144 LEDs on the board one-by-one, using tweezers (this can easily take a couple of hours) 3. Solder the LEDs on a hot plate 4. Apply solder paste to the back of the board with another stencil 5. Place the microcontroller, capacitors, resistors and other components on the board one-by-one 6. Solder the components with a hot air 7. Repeat the same steps for the 2nd board (with far fewer components on it) 8. Test and debug the boards (this can take until after midnight if there are many problematic boards) ## Registration To register for this workshop, please buy a kit at the [BlinkenArea](https://events.ccc.de/congress/2025/hub/assembly/detail/blinkenarea) assembly *as early as possible*. Only a limited number of kits is available. If you have any questions or would like to see an already built TicTacLights Nano Colour first, please visit us at the BlinkenArea. https://events.ccc.de/congress/2025/hub/https://usercontent.events.ccc.de/congress/2025/hub/usercontent/e/2506200c29f1/workshop-banner.jpg Arne https://events.ccc.de/congress/2025/hub/event/detail/tictaclights-nano-colour-reflow-soldering false 2025-12-28T14:00:00+01:00 14:00 01:00 Matrix Assembly 39c3-matrix-community-meetup_vazx en, de other The mandatory Matrix Community Meetup on 39c3 ! Meet with the Matrix Community, learn about upcoming events, make friends with your admins, learn about Stammtischs in your hood and discover that one cool new project ! https://events.ccc.de/congress/2025/hub/https://usercontent.events.ccc.de/congress/2025/hub/usercontent/e/fceebc1a52f2/matrix-community-events-dark-bg_VfNf39J.png The one with the braid (she/her) https://events.ccc.de/congress/2025/hub/event/detail/matrix-community-meetup_vazx false 2025-12-28T11:00:00+01:00 11:00 00:30 Jugend hackt Wohnzimmerbühne 39c3-nudeln-hacken-hacking-noodles-2_mdgd de other Wettbewerb für Junghackerinnen von 5 Jahren bis 1000 Spaß am Gerät: Mehrere Teams bauen gleichzeitig mit Nudeln um die Wette. Dabei geht es um kreativen Umgang mit Technik und die Erfahrung, dass man Dinge auch jenseits der eigentlichen Verwendungszwecke gut gebrauchen kann. Junghacker bzw. solche die es werden wollen, können alleine oder als Team kommen. Es kann jeder mitmachen, der weiß, was eine Nudel ist. PS: Es werden keine Lebensmittel verschwendet. PPS: Erwachsene dürfen auch mitmachen, wenn sie den Junghacker keinen Platz wegnehmen. Sie werden aber wahrscheinlich gegen den Nachwuchs verlieren :-D StefanH https://events.ccc.de/congress/2025/hub/event/detail/nudeln-hacken-hacking-noodles-2_mdgd false 2025-12-28T12:00:00+01:00 12:00 00:15 Jugend hackt Wohnzimmerbühne 39c3-long-term-support-bei-jugend-hackt-infos_e4aj de Talk Bist du 14-21 Jahre alt und träumst davon, mit anderen ein größeres Projekt umzusetzen? Mit dem [Jugend hackt Long Term Support](https://jugendhackt.org/lts/) bekommst du 1 Jahr lang alle Unterstützung, die du brauchst, von Mentoring bis Materialkosten. In dieser Session gibt es Infos & Vernetzungsmöglichkeiten dazu. **Teil 1 (15min): Infos zum Long Term Support - diese Session** Ihr erfahrt alles zum [Jugend hackt Long Term Support](https://jugendhackt.org/lts/) für junge Projektgruppen im Alter von 14-21 Jahren: Jugend hackt unterstützt eure Projektideen nicht nur mit 3 Tagen Hackathon, sondern mit 365 Tagen Projektsupport. Der Long Term Support bietet Wochenenden mit der Projektgruppe, Beratung durch erfahrene Mentor\*innen, hilfreichen Input, spannende Workshops - und die Möglichkeit, Projektergebnisse auf dem Congress 2026 und dem Chaos Communication Camp 2027 zu präsentieren! **Teil 2 (45min): Vernetzung und Brainstorming für Projektideen - Session im Anschluss** Im Anschluss besteht die Möglichkeit für Interessierte, sich gleich mit anderen Junghacker\*innen, Aktivist\*innen, Ideenversprüher\*innen, verplanten Bastler\*innen und krass organisierten Planer\*innen zu vernetzen und eine Projektidee auf die Beine zu stellen. Denn Projektgruppen können sich noch bis zum 11.01.2026 mit ihren Projektideen für eine bessere Welt bewerben: [Hier geht es zur Anmeldung](https://anmeldung.alpaka.space/berlin/lts/). https://pretalx.chaos.jetzt/media/jugend/submissions/ZWFE9L/LTS-Rakete_26hqChP.png eliah https://events.ccc.de/congress/2025/hub/event/detail/long-term-support-bei-jugend-hackt-infos_e4aj https://pretalx.chaos.jetzt/jugend/talk/ZWFE9L/ https://pretalx.chaos.jetzt/jugend/talk/ZWFE9L/feedback/ false 2025-12-28T12:15:00+01:00 12:15 01:00 Jugend hackt Wohnzimmerbühne 39c3-unplugtrump-deine-daten-deine-entscheidung de Workshop Was haben WhatsApp, TikTok, YouTube und Instagram gemeinsam? Sie gehören zu riesigen Tech-Konzernen, die damit Geld verdienen, möglichst viel über dich zu wissen – was du magst, mit wem du chattest, wann du online bist und sogar, wo du dich aufhältst. Gerade jetzt, wo Plattformen sich immer stärker politischer Macht und wirtschaftlichen Interessen beugen – zum Beispiel in den USA – wird klar: Die Kontrolle über deine Daten liegt nicht bei dir, sondern bei ihnen. Zeit, das zu ändern! Für Jugendliche zwischen 12 und 18 Jahren In unserem Workshop [#unplugTrump](https://events.ccc.de/congress/2025/hub/tag/unplugTrump) schauen wir uns genau an, wie diese Plattformen funktionieren Was ist ihr Geschäftsmodell? Warum sind sie „kostenlos“? Und was passiert mit den Daten, die du teilst? Statt nur zu kritisieren, zeigen wir dir Alternativen: freie Messenger, unabhängige Suchmaschinen, dezentrale soziale Netzwerke und andere Tools, mit denen du selbst entscheidest, was du teilst – und mit wem. 🔎🌍 Du recherchierst selbst in kleinen Gruppen, testest Alternativen und findest heraus, was für dich funktioniert. Begleitet wirst du dabei von engagierten Mentor:innen, die dir Impulse geben, Fragen beantworten und dich beim Ausprobieren unterstützen. Am Ende präsentierst du deine Ergebnisse: Welche Tools kanntest du noch nicht? Welche könntest du dir vorstellen zu nutzen? Welche Plattformen verdienen dein Vertrauen? Ob du bereits erste Erfahrungen mit diesen Themen hast oder dich zum ersten Mal damit beschäftigst: Du bist herzlich willkommen! Und gemeinsam machen wir den ersten Schritt in Richtung digitale Selbstbestimmung. https://pretalx.chaos.jetzt/media/jugend/submissions/QH8BTD/digitale_Selbstbestimmung_workshop-560x_2CX0aut.png Gerd Kant https://events.ccc.de/congress/2025/hub/event/detail/unplugtrump-deine-daten-deine-entscheidung https://pretalx.chaos.jetzt/jugend/talk/QH8BTD/ https://pretalx.chaos.jetzt/jugend/talk/QH8BTD/feedback/ false 2025-12-28T14:00:00+01:00 14:00 00:30 Jugend hackt Wohnzimmerbühne 39c3-ich-wei-wen-ich-irgendwie-kenne-aber-wer-kennt-eig de Talk Einlicke ins Wunderland der Identität. Bisschen wie Palantir, nur in jeder Hinsicht besser, und das ist ja auch nicht schwer. Andere Menschen in der Welt wollen uns aus verschiedenen Gründen - und sowieso sicherheitshalber - ein bisschen kennenlernen. In der Informationstechnologie, im Internet, im Gesellschaftssystem und an vielen weiteren Orten gibt es dafür vermeintlich sehr ausgefeilte Methoden und eine hohe Verfügbarkeit von Sensorik. Ganz egal, wie ich bin: Ich hinterlasse überall sichtbare Spuren. Ein bisschen Soziologie, ein bisschen Psychologie, ein bisschen Menschheitsgeschichte und ein bisschen Datenkorrelation: fertig ist das Analysetool zur Feststellung meiner Identität und Vorhersage zukünftiger Handlungen. Das kann nicht nur Palantir; das können auch andere. Und wir können es sowieso noch besser. Die Veranstaltung "Ich weiß, wen ich irgendwie kenne, aber wer kennt eigentlich irgendwie mich?" besteht aus zwei Teilen: einem Talk und einem Workshop. Annika https://events.ccc.de/congress/2025/hub/event/detail/ich-wei-wen-ich-irgendwie-kenne-aber-wer-kennt-eig https://pretalx.chaos.jetzt/jugend/talk/9JAYQJ/ https://pretalx.chaos.jetzt/jugend/talk/9JAYQJ/feedback/ false 2025-12-28T14:45:00+01:00 14:45 00:15 Jugend hackt Wohnzimmerbühne 39c3-long-term-support-bei-jugend-hackt-infos_8ue9 de Talk Bist du 14-21 Jahre alt und träumst davon, mit anderen ein größeres Projekt umzusetzen? Mit dem [Jugend hackt Long Term Support](https://jugendhackt.org/lts/) bekommst du 1 Jahr lang alle Unterstützung, die du brauchst, von Mentoring bis Materialkosten. In dieser Session gibt es Infos & Vernetzungsmöglichkeiten dazu. **Teil 1 (15min): Infos zum Long Term Support - diese Session** Ihr erfahrt alles zum [Jugend hackt Long Term Support](https://jugendhackt.org/lts/) für junge Projektgruppen im Alter von 14-21 Jahren: Jugend hackt unterstützt eure Projektideen nicht nur mit 3 Tagen Hackathon, sondern mit 365 Tagen Projektsupport. Der Long Term Support bietet Wochenenden mit der Projektgruppe, Beratung durch erfahrene Mentor\*innen, hilfreichen Input, spannende Workshops - und die Möglichkeit, Projektergebnisse auf dem Congress 2026 und dem Chaos Communication Camp 2027 zu präsentieren! **Teil 2 (45min): Vernetzung und Brainstorming für Projektideen - Session im Anschluss** Im Anschluss besteht die Möglichkeit für Interessierte, sich gleich mit anderen Junghacker\*innen, Aktivist\*innen, Ideenversprüher\*innen, verplanten Bastler\*innen und krass organisierten Planer\*innen zu vernetzen und eine Projektidee auf die Beine zu stellen. Denn Projektgruppen können sich noch bis zum 11.01.2026 mit ihren Projektideen für eine bessere Welt bewerben: [Hier geht es zur Anmeldung](https://anmeldung.alpaka.space/berlin/lts/). https://pretalx.chaos.jetzt/media/jugend/submissions/XC8VKW/LTS-Rakete_F8A8PNL_ZIZiqzI.png eliah https://events.ccc.de/congress/2025/hub/event/detail/long-term-support-bei-jugend-hackt-infos_8ue9 https://pretalx.chaos.jetzt/jugend/talk/XC8VKW/ https://pretalx.chaos.jetzt/jugend/talk/XC8VKW/feedback/ false 2025-12-28T15:00:00+01:00 15:00 00:45 Jugend hackt Wohnzimmerbühne 39c3-long-term-support-bei-jugend-hackt-vernetzung de Workshop Bist du 14-21 Jahre alt und träumst davon, mit anderen ein größeres Projekt umzusetzen? Mit dem [Jugend hackt Long Term Support](https://jugendhackt.org/lts/) bekommst du 1 Jahr lang alle Unterstützung, die du brauchst, von Mentoring bis Materialkosten. In dieser Session gibt es Infos & Vernetzungsmöglichkeiten dazu. **Teil 2 (45min): Vernetzung und Brainstorming für Projektideen - diese Session** Im Anschluss besteht die Möglichkeit für Interessierte, sich gleich mit anderen Junghacker\*innen, Aktivist\*innen, Ideenversprüher\*innen, verplanten Bastler\*innen und krass organisierten Planer\*innen zu vernetzen und eine Projektidee auf die Beine zu stellen. Denn Projektgruppen können sich noch bis zum 11.01.2026 mit ihren Projektideen für eine bessere Welt bewerben: [Hier geht es zur Anmeldung](https://anmeldung.alpaka.space/berlin/lts/). **Teil 1 (15min): Infos zum Long Term Support - Session davor** Ihr erfahrt alles zum [Jugend hackt Long Term Support](https://jugendhackt.org/lts/) für junge Projektgruppen im Alter von 14-21 Jahren: Jugend hackt unterstützt eure Projektideen nicht nur mit 3 Tagen Hackathon, sondern mit 365 Tagen Projektsupport. Der Long Term Support bietet Wochenenden mit der Projektgruppe, Beratung durch erfahrene Mentor\*innen, hilfreichen Input, spannende Workshops - und die Möglichkeit, Projektergebnisse auf dem Congress 2026 und dem Chaos Communication Camp 2027 zu präsentieren! https://pretalx.chaos.jetzt/media/jugend/submissions/RUAXYY/LTS-Rakete_F8A8PNL.png eliah https://events.ccc.de/congress/2025/hub/event/detail/long-term-support-bei-jugend-hackt-vernetzung https://pretalx.chaos.jetzt/jugend/talk/RUAXYY/ https://pretalx.chaos.jetzt/jugend/talk/RUAXYY/feedback/ false 2025-12-28T16:00:00+01:00 16:00 01:00 Jugend hackt Wohnzimmerbühne 39c3-jugend-hackt-meetup de Workshop Triff das Reisealpaka und tausch dich aus. Die Gelegenheit auf dem Congress für alle aus dem Jugend hackt-Kosmos zusammen zu kommen. Jugend hackt-Team https://events.ccc.de/congress/2025/hub/event/detail/jugend-hackt-meetup https://pretalx.chaos.jetzt/jugend/talk/SJZYNC/ https://pretalx.chaos.jetzt/jugend/talk/SJZYNC/feedback/ false 2025-12-28T17:00:00+01:00 17:00 01:00 Jugend hackt Wohnzimmerbühne 39c3-openstreetmap de Workshop Im Workshop lernt ihr gemeinsam mit anderen Jugendlichen, aktiv zur OpenStreetMap beizutragen. Der Fokus liegt auf der Vermittlung von digitalen Kompetenzen, der Bedeutung freier Daten und der Förderung von Zusammenarbeit Für Jugendliche zwischen 12 und 18 Jahren Entdecke die Welt von OpenStreetMap und werde ein Teil der OpenData-Bewegung! 🗺️ Egal, ob du schon mal von OpenStreetMap gehört hast oder nicht, in unserem Workshop lernst du, wie du selbst aktiv an einer der größten freien Kartenprojekte der Welt mitwirken kannst. Hier erfährst du, warum OpenData so wichtig ist und wie jede:r Einzelne dazu beitragen kann, die Daten für alle Menschen besser zu machen. Im Gegensatz zu den Karten großer Firmen wie Google Maps ist OpenStreetMap von der Community für die Community. Das bedeutet, dass jede:r Daten hinzufügen oder korrigieren kann. Und das Beste daran? Es macht riesigen Spaß, dabei mitzumachen! 😃 Also komm vorbei und lass uns gemeinsam die Welt ein Stückchen besser kartieren! 🌍 https://pretalx.chaos.jetzt/media/jugend/submissions/QV3MVU/lab-fuerstenberg-2020-openstreetmap_1nA_nSoKZj6.png Gerd Kant https://events.ccc.de/congress/2025/hub/event/detail/openstreetmap https://pretalx.chaos.jetzt/jugend/talk/QV3MVU/ https://pretalx.chaos.jetzt/jugend/talk/QV3MVU/feedback/ false 2025-12-28T19:00:00+01:00 19:00 00:30 Jugend hackt Wohnzimmerbühne 39c3-powerpoint-karaoke_0uxh de Talk Halte spontan eine zufällige, lustige Präsentation - du musst nichts halten und kannst auch einfach nur zuschauen :) Bei Powerpoint Karaoke hält man eine von uns gegebene absolute random Präsentation, die man vorher nie sah, was immer sehr sehr lustig ist. Wenn Du Dir noch unsicher bist oder sicher keine halten willst ist das überhaupt kein Problem, Du kannst gerne trotzdem vorbei kommen und einfach zu schauen （╹◡╹） Dimi David https://events.ccc.de/congress/2025/hub/event/detail/powerpoint-karaoke_0uxh https://pretalx.chaos.jetzt/jugend/talk/LUUTY3/ https://pretalx.chaos.jetzt/jugend/talk/LUUTY3/feedback/ false 2025-12-28T11:00:00+01:00 11:00 02:00 somewhere in the house of tea 39c3-cozy-crafting-session de, en other wir sitzen bei Tee gemütlich zusammen und quatschen und stricken/häkeln/sticken ect ein gemütlicher start in Tag 2 we sit together with a cup of tea and chat while crafting a cozy start for day 2 Lorva (keine/no pronouns) https://events.ccc.de/congress/2025/hub/event/detail/cozy-crafting-session false 2025-12-28T12:00:00+01:00 12:00 01:00 Call for Art: Workshopspace 1 39c3-empower-your-non-tech-community en other Workshop with Anna Maria * DAY 2: 12:00 - 13:00 * DAY 4: 14:00 - 15:00 Starting from the assumption that, as those privileged with knowledge and experience in technology, we are obliged to share it with people who don’t have such competencies. Strengthening non-tech communities is essential for our collective well-being. What is the minimum level of tech education that everyone engaged in class struggle should acquire? Do we have the tools to protect non-tech people in our environment beyond the hackerspaces communities? How to build horizontal safe-spaces, secure infrastructures to educate others and which tools and techniques are the most effective for education? Let's have a discussion and create ready to use solutions. Link: [https://sanma.cargo.site/](https://sanma.cargo.site/) https://events.ccc.de/congress/2025/hub/event/detail/empower-your-non-tech-community false 2025-12-28T14:00:00+01:00 14:00 02:00 Call for Art: Workshopspace 1 39c3-pixelprinting-with-bricks_hdlc en other Workshop with pixelprint DAY 1: 14:30 - 16:30 DAY 2: 14:00 - 16:00 DAY 3: 14:00 - 16:00 We print with building block tiles, also known as Lego Dots™, on paper. There will be a short introduction to the printing technique and how to create the printing plates. We print using the primary colors and can mix any other color as needed. What makes Lego Dots™ exciting is that you are bound to a grid – in this case, 8×8 units. The tiles come in different shapes: circles, squares, quarter circles, and many more. Have a look at the gallery to see some examples. We print using a press from the Open Press Project. The print size is limited to 7×7 cm due to the press we are using. It is a “jump-in” workshop with no registration required – when one person leaves, the next can join in. Link: [https://pxlprnt.de](https://pxlprnt.de) https://events.ccc.de/congress/2025/hub/https://usercontent.events.ccc.de/congress/2025/hub/usercontent/e/da04044dad9a/Pixelprint_ing_with_bricks_Klemmbausteine_Alain_Wohlfarth.jpg https://events.ccc.de/congress/2025/hub/event/detail/pixelprinting-with-bricks_hdlc false 2025-12-28T17:30:00+01:00 17:30 01:30 Call for Art: Workshopspace 1 39c3-how-to-break-your-face-keeping-up-with-the-ar_ni66 en other Workshop with Anna Maria & Michelle Tylicki DAY 1: 18:00 - 19:30 DAY 2: 17:30 - 19:00 DAY 3: 20:30 - 22:00 Facial recognition systems are rapidly advancing - fusing infrared, facial geometry, gait, and metadata into oppressive infrastructures of racist policing and surveillance capitalism. At the same time, artists, activists and everyday citizens are developing creative ways to interfere, confuse, and disappear from automated identification. Workshop 1: Break Your Face Hands-on demonstration of Dazzle anti-surveillance makeup techniques. Live-testing our work to understand machine vision -and how to break it. Workshop 2 + 3: Zine-making Starting with a discussion of creative anti-surveillance tactics, we then combine the workshop participants' knowledge and experience to co-creating a zine. Info: We will be using easily available live face filters on smart phones (instagram/snapchat/tiktok). Participants can use their own phones. The data is not uploaded or saved anywhere. Links: [www.michelletylicki.info/](www.michelletylicki.info/) [www.sanma.cargo.site/](www.sanma.cargo.site/) https://events.ccc.de/congress/2025/hub/https://usercontent.events.ccc.de/congress/2025/hub/usercontent/e/f2ae8506535c/HOW_TO_BRAK_YOUR_FACE__c_Anna_Maria_reshaped.jpg https://events.ccc.de/congress/2025/hub/event/detail/how-to-break-your-face-keeping-up-with-the-ar_ni66 false 2025-12-28T20:00:00+01:00 20:00 01:30 Call for Art: Workshopspace 1 39c3-post-platform-digital-publishing_s7hy other Workshop mit Well Gedacht Publishing TAG 1: 20:30 - 22:00 TAG 2: 20:00 - 21:30 Please bring your laptop. TAG 4: 11:30 - 13:00 In this workshop, we will engage with digital publishing methods that operate independently of big tech platforms and products. We will build our own RSS files for personal websites, blogs and discuss pirate publishing forms, both online and offline. We will present the idea of the PPDP-PRINTER, a DIY device currently under development that combines web2print scripts with a simple server and local online publishing/broadcasting capabilities. The printer converts files, prints via its dot-matrix printer, creates RSS feeds, and serves them online. Our aim with the PPDP-PRINTER is to create an all-in-one material manifestation of our resource collection Post-Platform Digital Publishing Toolkit Please bring your laptop. Link: [https://publishing.wellgedacht.com/](https://publishing.wellgedacht.com/) mastodon: [@wellgedachtpublishing@post.lurk.org](https://post.lurk.org/@wellgedachtpublishing) https://events.ccc.de/congress/2025/hub/https://usercontent.events.ccc.de/congress/2025/hub/usercontent/e/9730b4d1ef11/Post-Platform_Digital_Publishing_Fadi_Houmani.jpeg https://events.ccc.de/congress/2025/hub/event/detail/post-platform-digital-publishing_s7hy false 2025-12-28T13:30:00+01:00 13:30 02:00 Call for Art: Workshopspace 2 39c3-kivoodoo-extracting-future-sealife-with-genai_8wd6 other Workshop with ceryo / Jo Tiffe * DAY 1: 17:30 - 19:30 * DAY 2: 13:30 - 15:30 In the workshop, we discover motifs that genAIs tend to overlook: marine flora and fauna. On top of that, we will try to find out what these might look like in 10 years' time, under both utopian and dystopian conditions. We will work with image and video generators. > WARNING Link: [https://form-f.net/bugbone.form-f.art](https://form-f.net/bugbone.form-f.art) Instagram: [@j0.tiff](https://instagram.com/@j0.tiff) Bluesky: [@j0tiff.bsky.social](https://bsky.app/profile/j0tiff.bsky.social) Mastodon: [@Jo_designart@digitalcourage.social](https://digitalcourage.social/@Jo_designart) https://events.ccc.de/congress/2025/hub/https://usercontent.events.ccc.de/congress/2025/hub/usercontent/e/799aad907358/KI.VooDoo_-_extracting_future_sealife_with_genAI_Jo_Tiffe.jpg https://events.ccc.de/congress/2025/hub/event/detail/kivoodoo-extracting-future-sealife-with-genai_8wd6 false 2025-12-28T16:30:00+01:00 16:30 03:00 Call for Art: Workshopspace 2 39c3-inspired-by-canadian-disabled-artist-margeaux-feld en other Workshop with Christian Faubel * DAY 2: 16:30 - 19:30 * DAY 3: 16:00 - 19:00 Performance DAY 4: art&play [tba] This is an advanced soldering workshop for creating motorcontrollers that bring motors to tap rhythmically with each other. Each participant builds her own board to drive two motors that will then tap in polyrhythms. The electronic circuits in this workshop derive from minimal and low-cost bio-inspired robots. Oscillators are used to drive motors that produce sound, but they can also be connected to synthesizers. Each circuit board is designed to be wired up with the boards from the other participants in order to explore together the magic of emergent polyrhythm by wiring their individual circuits to form a huge network. Big fun and deep dive into analog circuits and their emergent properties. Link: [https://christian.faubel.derstrudel.org](https://christian.faubel.derstrudel.org) Mastodon: [https://post.lurk.org/@derstrudel](https://post.lurk.org/@derstrudel) https://events.ccc.de/congress/2025/hub/event/detail/inspired-by-canadian-disabled-artist-margeaux-feld false 2025-12-28T20:30:00+01:00 20:30 01:00 Call for Art: Workshopspace 2 39c3-trikkitt-polygen-hands-on other PolyGen: Sehe dir das Innere der Geräte an, erfahre, wie sie funktionieren, und baue eines auseinander. Lerne, wie das Spiel funktioniert, und stelle alle Fragen, die du dazu hast. Artist: Trikkitt Genre: workshop PolyGen: See inside the units, see how they work, and get to pull one apart. Learn how the game works and ask any questions you have about it. Picture: PolyGen ©Trikkitt [https://gen.polyb.io](https://gen.polyb.io) https://events.ccc.de/congress/2025/hub/https://usercontent.events.ccc.de/congress/2025/hub/usercontent/e/9e63f7834dd1/319-240-max.jpg Marty https://events.ccc.de/congress/2025/hub/event/detail/trikkitt-polygen-hands-on false 2025-12-28T14:00:00+01:00 14:00 02:00 Art & Play: Bus Roof Top 39c3-scrapergeist-zeitungsgedichte-in-retro-und-visiona other Workshop mit Marcel Schneuer TAG 2: 14:00 - 16:00 TAG 3: 16:30 - 18:30 Computer magazines from the early 2000s, interviews with magical thinking, and the most creative ways to reassure shareholders. The tech industry is full of technoid dreams, advertisements for the future, and error messages in continuous text. In this workshop, we hack these archives analogously: we cut, collage, and remix the old pages into new, poetic forms. No prior knowledge is necessary. Scissors, glue and texts are provided (your own finds are welcome). The offered source material will be mostly in German. Link: [https://schneuer.online/blog/workshop-scrapergeist-beim-39c3/](https://schneuer.online/blog/workshop-scrapergeist-beim-39c3/) https://events.ccc.de/congress/2025/hub/https://usercontent.events.ccc.de/congress/2025/hub/usercontent/e/46d27bf8ae4f/Scrapergeist_-_Zeitungsgedichte_in_retro_und_vision%C3%A4r_pixabay_von_Majid_Shahid.jpg https://events.ccc.de/congress/2025/hub/event/detail/scrapergeist-zeitungsgedichte-in-retro-und-visiona false 2025-12-28T17:00:00+01:00 17:00 01:30 Art & Play: Bus Roof Top 39c3-pitch-power-zeichnen-machtdynamiken-sichtbar-_ea0y other Zeichnen ist Denken und Sprechen zugleich. Nur mit den Händen. Es hilft uns auch beim Verstehen und Erklären von Machtverhältnissen. Und egal, was uns immer erzählt wurde. Wir alle können zeichnen. Also: Stift raus, Power an – let’s draw! Drawing is like thinking and speaking at the same time. Just with our hands. And it helps us to understand and explain power dynamics. And despite all that we were told: we all can draw. So: pens out, full power — let’s draw! [www.loufo.info](www.loufo.info) [www.justus.plus](www.justus.plus) Picture: ©Justus Pfeiffer https://events.ccc.de/congress/2025/hub/https://usercontent.events.ccc.de/congress/2025/hub/usercontent/e/30719bf64468/768-1024-max.jpg Marty https://events.ccc.de/congress/2025/hub/event/detail/pitch-power-zeichnen-machtdynamiken-sichtbar-_ea0y false 2025-12-28T19:00:00+01:00 19:00 00:30 Kidspace - Affenfelsen 39c3-guten8geschichte-das-neinhorn-und-die-schlangeweil de other Mach es dir gemütlich und lausche einer zauberhaften Geschichte! An drei Abenden liest Nolo jeweils um 19:00 Uhr einen Teil aus Marc-Uwe Klings Neinhorn-Reihe als GuteN8Geschichte vor. This event will be held in German. Anyone who feels like enjoying a relaxed story time **Age**: 0+ **Just drop by and join us as we dive into the imaginative world of the NEINhorn!** **Duration:** approx. 30 minutes per evening https://events.ccc.de/congress/2025/hub/https://usercontent.events.ccc.de/congress/2025/hub/usercontent/e/62f70ca5f122/g8g.png ghenny https://events.ccc.de/congress/2025/hub/event/detail/guten8geschichte-das-neinhorn-und-die-schlangeweil false 2025-12-28T10:00:00+01:00 10:00 01:00 CADUS Skill-Station 39c3-mini-wasser-labor-for-kids de other In diesem Workshop wirst du selbst zur Wasser-Filter-Expert*in! Gemeinsam bauen wir einfache Wasserfilter, testen verschiedene Materialien und schauen, wie aus richtig schmutzigem Wasser wieder klares Wasser wird. Natürlich darfst du selbst mischen, experimentieren und herausfinden, was am besten funktioniert. In this workshop, you’ll become a real water-filter expert! Together, we’ll build simple water filters, test different materials, and see how dirty water can turn clear again. Of course, you’ll get to mix, experiment, and discover for yourself what works best. https://events.ccc.de/congress/2025/hub/event/detail/mini-wasser-labor-for-kids false 2025-12-28T12:00:00+01:00 12:00 01:00 CADUS Skill-Station 39c3-hack-the-training-call-for-ideas-fur-diy-losungen- de other Für die Katastrophe trainieren heißt am besten so realistisch wie möglich trainieren. Das praktizieren wir bei CADUS schon lange so gut wie nur irgend möglich. Aber wie simuliert mensch eigentlich Katastrophe? Und wie das Material, das man für die Trainings braucht? Und hat da grade wer „open source” gesagt? Our CADUS trainings are based on the motto “Train as you fight,” which means we try to make our operational simulations as realistic as possible. To achieve this, we have to simulate the “dangerous aspects” of disasters such as fire, explosions, toxic substances, highly infectious germs, radiation, dangerous injuries, etc. Training equipment such as fire simulators, mannequins that can be used to train ultrasound examinations , radiation sources, and detectors are available on the market at exorbitant prices, making it impossible to scale high-quality, realistic training. In this open workshop format, we first want to show you how we've already approached this problem productively here and there... and then brainstorm together about where the journey could take us. From F/X to a bit of creative electronics, innovative event technology, to 3D printing and digital simulations. We are looking for elegant programming and realistic DIY constructions! So if you feel like brainstorming creative workarounds and maybe even implementing them with and for CADUS after the congress, come on by! https://events.ccc.de/congress/2025/hub/event/detail/hack-the-training-call-for-ideas-fur-diy-losungen- false 2025-12-28T13:00:00+01:00 13:00 00:30 CADUS Skill-Station 39c3-daily-tech-talk-cadus-academy-building-an-ope_vstd de, en other Each day, we’ll give a short insight into the development of the CADUS Academy: our open learning platform for medical, technical, and psychosocial training. We’ll share where the project currently stands, the ideas shaping it, and how the community can get involved. Questions, feedback, and spontaneous discussions are warmly welcome. https://events.ccc.de/congress/2025/hub/event/detail/daily-tech-talk-cadus-academy-building-an-ope_vstd false 2025-12-28T14:00:00+01:00 14:00 01:00 CADUS Skill-Station 39c3-nasenmusik-fur-fortgeschrittene-schnufflerinn_jdpe de other Entdecke das wahrscheinlich lustigste Instrument der Welt, die Nasenflöte! Nach einer kurzen Einführung übt jede*r in eigenem Tempo die ersten Töne. Klappt das Tröten, geht’s weiter mit einfachen Melodien – und schließlich spielen wir gemeinsam als Nasenflöten-Orchester beliebte Songs und Wunschmelodien. Lustig, überraschend, musikalisch – und garantiert einmalig! Welcome to what is probably the world's only orchestra where the most important sound-producing instrument is... your nose! Each participant receives a fresh nose flute and easy-to-understand instructions on how to correctly position, breathe, and blow this wondrous instrument. Then it's time to learn by sniffing! Everyone practices at their own pace how to conjure up individual notes cleanly from their nose—from a delicate peep to a confident TOOT. Once everyone has got the hang of it (and the first tears of laughter have dried), we venture into simple sequences of notes that already sound suspiciously like music. And if that works well, it gets really epic: We transform ourselves into a nose flute a cappella orchestra, where everyone can suggest melodies – from children's songs to epic film themes. Together, we make the air vibrate! In short: A workshop full of fun, tooting noises, unexpected talents – and real music from the nose. Anna-Lea https://events.ccc.de/congress/2025/hub/event/detail/nasenmusik-fur-fortgeschrittene-schnufflerinn_jdpe false 2025-12-28T19:00:00+01:00 19:00 01:00 CADUS Skill-Station 39c3-gis-im-krisengebiet-karten-chaos-cadus en other GIS im Krisengebiet: Karten, Chaos & Cadus GIS at CADUS: How we work with sensitive map data in crisis zones, which tools (OSMAND, Maps.me, OSM, Google) actually work, where they fail, and how we’re building our own offline-first GIS. Looking forward to your experiences and ideas! https://events.ccc.de/congress/2025/hub/event/detail/gis-im-krisengebiet-karten-chaos-cadus false 2025-12-28T20:00:00+01:00 20:00 01:00 CADUS Skill-Station 39c3-der-talk-solidarisch-preppen_vonm de other We want to engage in a joint discussion with you about what far-right crisis narratives are and why they can never be based on solidarity. Anna-Lea https://events.ccc.de/congress/2025/hub/event/detail/der-talk-solidarisch-preppen_vonm false 2025-12-28T11:00:00+01:00 11:00 01:00 Free Knowledge Habitat 39c3-accessing-wikidata-data-with-python-en en Workshop There are many ways that we can get data from Wikidata. In this workshop we'll explore using Python to leverage popular APIs provided by Wikimedia Foundation and Wikimedia Deutschland as well as community developed packages to easily get data for projects and research. We'll specifically look at the pros and cons of using certain methods for certain types of data so that we can make educated decisions on the best tools to use to get the data we need. The slides for this talk can be found here: https://docs.google.com/presentation/d/18lXrAI3UcPvkdsDMZXRp7kbawlbZxTyCLrhEafjk2dA/edit?usp=sharing Andrew McAllister https://events.ccc.de/congress/2025/hub/event/detail/accessing-wikidata-data-with-python-en https://pretalx.wikimedia.de/39c3-2025/talk/QHRFU9/ false 2025-12-28T12:15:00+01:00 12:15 00:30 Free Knowledge Habitat 39c3-glam-digital-kulturerbe-im-virtuellen-dialog-zugan de Talk Vorstellung des Online-Partizipationsformates "GLAM digital" Innerhalb der letzten Monate konnten wir zwei schöne Jubiläen begehen, das gemeinsam von Wikimedia Österreich und Wikimedia Deutschland durchgeführte Format „GLAM digital“ konnte jüngst über 100 Gastvortragende begrüßen, die an über 50 Ausgaben teilgenommen haben. Fast jeden Monat bringt die Reihe ausgewählte Kultur- und Gedächtnisinstitutionen in den Austausch mit der Wikipedia-Community. Die beteiligten Institutionen reichten von großen Häusern wie dem Kunsthistorischen Museum in Wien oder dem Museum Barberini in Potsdam bis zu Entdeckungen wie dem Archiv deutscher Frauenbewegungen oder dem Osttiroler Bauernhofmuseum Wurzerhof. Auch Museumsverbände oder nationale UNESCO-Kommissionen zählten bereits zu den Gästen. Wir möchten euch das Format kurz vorstellen und euch zur Mitwirkung an künftigen Ausgaben von „GLAM digital“ einladen. Mehr zum Format könnt ihr auch in Blogbeiträgen oder in der Wikipedia nachlesen. Folien: https://commons.wikimedia.org/wiki/File:GLAM_digital_39c3_2025_final.pdf https://pretalx.wikimedia.de/media/39c3-2025/submissions/GPVCHH/Bildschirmfoto_2025-12-22_um_11.39.16_YjbnCnG.png Holger Plickert (WMDE) https://events.ccc.de/congress/2025/hub/event/detail/glam-digital-kulturerbe-im-virtuellen-dialog-zugan https://pretalx.wikimedia.de/39c3-2025/talk/GPVCHH/ false 2025-12-28T13:00:00+01:00 13:00 00:30 Free Knowledge Habitat 39c3-wie-man-mit-offenen-geodaten-und-wikidata-natur-un de Talk Wikidata enthält viele Daten zu geografischen Objekten. Die Möglichkeiten für die Darstellung von Geodaten innerhalb von MediaWiki sind jedoch beschränkt. Ich habe offene Geodaten aus dem Bereich Natur- und Denkmalschutz mit Wikidata verknüpft und damit eine Kartenanwendung gebaut. Diese Karte dient dazu, noch nicht fotografierte Schutzgebiete und Denkmäler zu finden und zu dokumentieren. GPSLeo https://events.ccc.de/congress/2025/hub/event/detail/wie-man-mit-offenen-geodaten-und-wikidata-natur-un https://pretalx.wikimedia.de/39c3-2025/talk/DDKV8G/ false 2025-12-28T13:45:00+01:00 13:45 00:30 Free Knowledge Habitat 39c3-hakuna-data-eine-sehr-kurze-einfuhrung-in-kiswahil de Talk Swahili, lexikographische Daten in Wikidata und Wikifunctions. Ein Team so stark wie Timon und Pumbaa. Angenommen du reist nach Nairobi zu einer Wikimedia-Konferenz, lernst gerade so Touri-Phrasen wie "Hujambo" und "Asante", und plötzlich beginnst du dich für die Datenstruktur der Sprache zu interessieren. Das ist mir dieses Jahr passiert. Swahili ist eine faszinierende Sprache, zu der ich ein bisschen was erzählen werde. Es geht u.a. um Nominalklassen und Verbtabellen und wie sie in einen Pandas DataFrame passen. Leider gibt es ein Problem: Wikidata enthält kaum Swahili-Lexeme. Wörterbucheinträge sind rar und Definitionen noch rarer, sagt SPARQL, Das ist ein echtes Problem. Denn schließlich bedeuten mehr Swahili-Daten in Wikidata auch mehr Swahili im Semantic Web. Mit Wikifunctions könnten wir Funktionen bauen, die automatisch Sätze wie einen Wikpedia-Artikela nfang erzeugen ("Nairobi ist eine Stadt”), zum Beispiel in Swahili, auf Knopfdruck! Stell dir vor, ein Wikifunction-Generator erzeugt Swahili-Sätze, während Wikidata die nötigen Lexeme stellt. Das klingt wie ein Märchen? Wenn wir kollaborativ zusammenarbeiten, kann es Wirklichket werden. https://pretalx.wikimedia.de/media/39c3-2025/submissions/X8XT9Y/Lion-king-disneyscreencaps.com-5591_UJlQRvz.jpg Jens Ohlig https://events.ccc.de/congress/2025/hub/event/detail/hakuna-data-eine-sehr-kurze-einfuhrung-in-kiswahil https://pretalx.wikimedia.de/39c3-2025/talk/X8XT9Y/ false 2025-12-28T14:45:00+01:00 14:45 01:00 Free Knowledge Habitat 39c3-ask-me-anything-internet-governance en Workshop Internet Governance beeinflusst, wie offen, sicher und zugänglich das Internet ist – von technischen Standards über Plattformregulierung bis hin zu Fragen von Macht und Teilhabe. In diesem interaktiven Ask Me Anything-Workshop laden wir Teilnehmende dazu ein, ihre Fragen, Zweifel und Kritik rund um Internet Governance einzubringen (unabhängig von Vorwissen). Der Workshop bietet einen niedrigschwelligen Einstieg in zentrale Akteure, Prozesse und Konfliktlinien der Internet Governance (z. B. Multistakeholder-Ansatz, Staaten vs. Tech-Konzerne, Global Digital Compact, WSIS, IETF, ICANN, W3C; und noch viel mehr Abkürzungen). Gleichzeitig ist Raum für vertiefende Diskussionen, persönliche Erfahrungen und aktuelle politische Aushandlungen. Ziel ist es, Internet Governance entmystifizieren, Machtstrukturen sichtbar zu machen und gemeinsam zu diskutieren, wie eine gerechtere und inklusivere digitale Zukunft aussehen kann. Sophia Longwe Ben Burmeister Friederike von Franqué https://events.ccc.de/congress/2025/hub/event/detail/ask-me-anything-internet-governance https://pretalx.wikimedia.de/39c3-2025/talk/NYT7YQ/ false 2025-12-28T16:00:00+01:00 16:00 01:00 Free Knowledge Habitat 39c3-powering-transparency-open-data-across-parliaments en Workshop Join us for a workshop featuring three cool projects about open parliamentary data! [HowTheyVote.eu](https://howtheyvote.eu/) makes it easy to see how European Parliament members vote. [Open Parliament TV](https://de.openparliament.tv/) lets you search and interact with over 79,000 speeches from the German Bundestag. [Open Data Ranking](https://opendataranking.de/) shows how parliamentary data is (un)available in Germany. We'll talk about the fun of linked open data (oh hai [Wikidata](https://www.wikidata.org/wiki/Wikidata:Identifiers)), currently challenging conditions and how to make more people aware of it inside and outside of parliaments. We welcome everyone interested in open parliamentary data or working in/around parliaments! PS: We are collecting all the links mentioned in the workshop in this pad: https://pad.okfn.de/p/OpenParlData39C3 How They Vote, Open Parliament TV and Open Data Ranking https://events.ccc.de/congress/2025/hub/event/detail/powering-transparency-open-data-across-parliaments https://pretalx.wikimedia.de/39c3-2025/talk/N98UMH/ false 2025-12-28T17:15:00+01:00 17:15 01:00 Free Knowledge Habitat 39c3-bingo_0xgq de Workshop Spiele unser jährliches Bingo mit uns! ------ Play our annual bingo with us! Komm vorbei und spiele das allseits bekannte und beliebte Bingo mit uns. ------- Come by and play the annual bingo at the Free Knowledge Habitat with us. Merle Kara https://events.ccc.de/congress/2025/hub/event/detail/bingo_0xgq https://pretalx.wikimedia.de/39c3-2025/talk/BKHNTR/ false 2025-12-28T20:00:00+01:00 20:00 01:00 Free Knowledge Habitat 39c3-wikidata-live-querying de Workshop Lasst uns gemeinsam lustige Wikidata-Abfragen schreiben! In Wikidata warten ganz viele Schätze darauf, gehoben zu werden. In diesem Workshop schreiben wir gemeinsam SPARQL-Queries, um Daten aus Wikidata abzufragen. Lucas Werkmeister https://events.ccc.de/congress/2025/hub/event/detail/wikidata-live-querying https://pretalx.wikimedia.de/39c3-2025/talk/VTELBK/ false 2025-12-28T12:00:00+01:00 12:00 00:50 Bits&Bäume Living Room 39c3-digital-humanities-meetup_86vd de Meetup 50 Minutes Digital Humanities: Forschung in den Geisteswissenschaften in digitaler Form, kurz: DH. Wir treffen uns zu einem lockeren Kennenlernen und Gedankenaustausch. Was ist Euer Interesse an den DH, wo verortet Ihr Euch in der Chaosfamilie? Welche Themen des 39C3 könnten für die DH relevant sein - und umgekehrt? Digital Humanities: Forschung zu Literatur, Geschichte, Sprache, Kunst, Musik in digitaler Form - von Rechercheprozessen über Analysemethoden bis hin zu Publikationsformen. Als Brückendisziplin zwischen IT und geisteswissenschaftlichen Fächern operieren die "DH" aber nicht nur anwendungsbezogen, sondern auch transformativ: Sie evaluieren kritisch im Diskurs, welche Aspekte der fortlaufenden Digitalisierung für die wissenschaftliche Praxis förderlich genutzt werden können. Damit sorgen sie aber auch stets für Aufregung, wenn es darum geht, etablierte wissenschaftliche Prozesse zu stören: Etwa, wenn es um Open Source, Open Science, Open Data geht sowie um FAIR- und CARE-Prinzipien oder um nichtproprietäre Standards. Wir begleiten als Digital Humanists somit nicht nur die Digitalisierung von Kulturdokumenten und Wissenschaft(sbürokratie), sondern auch von Arbeitsprozessen mit dem Ziel, in diesem Zuge auch eine freiere, fairere, nachhaltigere, zugänglichere, offenere und digitalsouveränere Wissenschaftspraxis zu etablieren. Wir schließen an die Meetups der letzten beiden Jahre an und treffen uns wieder zu einem lockeren Kennenlernen und Gedankenaustausch (siehe unser Pad dazu: https://etherpad.wikimedia.org/p/DHMeetup). Willkommen sind alle, die an den DH interessiert sind - und vermutlich sind viele bereits in der Chaos-Familie, ohne dass wir voneinander wissen. Wo in der Chaos-Familie verortet Ihr Euch? Welche Themen des 39C3 könnten für die DH relevant sein und umgekehrt? Kommt zahlreich! Nach Bedarf können wir weitere Meetups oder SoS zu spezifischen Themen organisieren. Ulrike Wuttke Torsten Roeder https://events.ccc.de/congress/2025/hub/event/detail/digital-humanities-meetup_86vd https://pretalx.freifunktag.de/39c3-bub-workshops-2025/talk/CAN9JP/ true 2025-12-28T13:00:00+01:00 13:00 00:50 Bits&Bäume Living Room 39c3-openstreetmap-software-development-ask-us-anything en Meetup 50 Minutes OpenStreetMap is not a project but rather a movement with small core and many different applications and libraries to us the data. In this Ask Us Anything session, you can ask all the questions about OpenStreetMap data usage as a software developer. OpenStreetMap is not a project but rather a movement with small core and many different applications and libraries to us the data. However, there is no central documentation and finding the right tool for your job is challenging. The first search result might work. Will it point to the right tool on long term? Will you run into performance issues or can it handle the complete dataset? How much memory can do you need for X? In this Ask Us Anything session, you can ask all the questions about OpenStreetMap data usage as a software developer. As experienced developers for OpenStreetMap based services (and mappers), we have used lots of different libraries and tools to access and modify the data, to calculate routes or render maps. Nakaner https://events.ccc.de/congress/2025/hub/event/detail/openstreetmap-software-development-ask-us-anything https://pretalx.freifunktag.de/39c3-bub-workshops-2025/talk/87XQBL/ false 2025-12-28T15:00:00+01:00 15:00 00:50 Bits&Bäume Living Room 39c3-openstreetmap-meetup de Meetup 50 Minutes Ob langjähriges Community-Mitglied, Mapper-Neuling oder einfach nur neugierig – komm vorbei, teile deine Erfahrungen und lass dich von der Begeisterung für OpenStreetMap anstecken! Die OpenStreetMap-Community lädt alle Mitglieder sowie Interessierte herzlich zu einem Meetup auf dem 39C3 ein! Dies ist die perfekte Gelegenheit, um: - Gleichgesinnte aus der Community kennenzulernen - spannende Projekte und Ideen auszutauschen - über die Zukunft von OpenStreetMap und aktuelle Entwicklungen zu diskutieren Egal, ob du aktiver Mapper bist, neue Technologien rund um OSM spannend findest oder einfach nur neugierig bist – wir freuen uns auf dich! Marc https://events.ccc.de/congress/2025/hub/event/detail/openstreetmap-meetup https://pretalx.freifunktag.de/39c3-bub-workshops-2025/talk/GBY79R/ true 2025-12-28T17:00:00+01:00 17:00 00:50 Bits&Bäume Living Room 39c3-fur-datenschutz-menschenrechte-artenschutz-bb-comm de Meetup 50 Minutes Du bist schon Teil von Bits & Bäume oder interessierst dich Bits & Bäume kennen zu lernen? Komm beim Täglichen Meetup zum Austausch und Vernetzen zu Themen globaler Gerechtigkeit und digitaler Selbstbestimmtheit. Du bist schon Teil von Bits & Bäume oder interessierst dich Bits & Bäume kennen zu lernen? Komm beim Täglichen Meetup zum Austausch und Vernetzen zu Themen globaler Gerechtigkeit und digitaler Selbstbestimmtheit. https://pretalx.freifunktag.de/media/39c3-bub-workshops-2025/submissions/8MZ3ES/38c3-wohnzimmer-lounge_tPYsfBL.jpg benks https://events.ccc.de/congress/2025/hub/event/detail/fur-datenschutz-menschenrechte-artenschutz-bb-comm https://pretalx.freifunktag.de/39c3-bub-workshops-2025/talk/8MZ3ES/ false 2025-12-28T18:00:00+01:00 18:00 00:50 Bits&Bäume Living Room 39c3-fiff-meetup de Workshop 50 Minutes Triff das Forum InformatikerInnen für Frieden und gesellschaftliche Verantwortung. Wir sind ein Zusammenschluss engagiert-kritischer Fachleuten aus Wissenschaft und Praxis der Informati(onstechni)k Das FIfF ist ein Zusammenschluss von engagiert-kritischen Fachleuten aus Wissenschaft und Praxis der Informati(onstechni)k. Wir denken über die Konsequenzen unserer Arbeit nach, warnen vor schädlichen Entwicklungen und bringen eigene konstruktive Vorstellungen ein. Wir beraten Politik und Medien, publizieren eine eigene Zeitschrift und organisieren Konferenzen, Vorträge und Demonstrationen. Das FIfF ist in Regionalgruppen organisiert und wurde 1984 gegründet. keldo benks https://events.ccc.de/congress/2025/hub/event/detail/fiff-meetup https://pretalx.freifunktag.de/39c3-bub-workshops-2025/talk/TMSHBS/ false 2025-12-28T20:00:00+01:00 20:00 00:50 Bits&Bäume Living Room 39c3-vernetzungstreffen-orr de Meetup 50 Minutes Dies Treffen soll Mitarbeitende des Öffentlich-Rechtlichen-Rundfunk, die sich im Chaos bewegen, die Möglichkeit zum Kennenlernen und Austauschen geben. Du arbeitetest im Öffentlich-Rechtlichen-Rundfunk und bist auf dem Congress? Dann haben wir etwas gemeinsam. Lasst uns treffen & kennenlernen. benny https://events.ccc.de/congress/2025/hub/event/detail/vernetzungstreffen-orr https://pretalx.freifunktag.de/39c3-bub-workshops-2025/talk/79FNMH/ true 2025-12-28T12:00:00+01:00 12:00 01:00 OGM Workshop Space 39c3-building-antennas-and-tinkering-with-them de, en other Lasst uns ein paar Antennen für LoRa 868MHz oder 70cm bauen, die analysieren, die wir bereits haben und mit deren unglaublicher Performance angeben. Dieser Workshop richtet sich an alle Wesen mit Interesse an Elektromagnetismus, wir rechnen aber damit, dass um diese Uhrzeit auch Junghacker:Innen mit Interesse an einer (veganen) Fuchsjagd auftauchen werden. Energy must leave into space so we can communicate, for that we need antennas. This small workshop will provide a rough introduction to what characteristics an antenna has and how you can build antennas for your devices. And in the end we'll build some antennas together, so that you are well equipped for congress. We'll bring a small selection of tools as well as supplies, but we'll be happy if you bring some along yourself, too. If you are a Junghacker:in this session is especially well suited for you, but if you want to join us for the same workshop in the afternoon you're as welcome. strafpla.net (he/him) https://events.ccc.de/congress/2025/hub/event/detail/building-antennas-and-tinkering-with-them false 2025-12-28T16:00:00+01:00 16:00 01:00 OGM Workshop Space 39c3-building-antennas-and-tinkering-with-them_az05 en, de other Let's build some antennas for LoRa 868MHz or 70cm, analyse what we have and brag about their incredible performance. This workshop is for all beings interested into electromagnetism, but we expect that it may be too late for Junghacker:innen to join in and still make use of it for a (vegan) Fox hunting in the afternoon. But of course everyone is welcome. Energy must leave the radio into space so we can communicate, for that we need antennas. This small workshop will provide a rough introduction to what characteristics an antenna has and how you can build antennas for your devices. And in the end we'll build some antennas together, so that you are well equipped for congress. We'll bring a small selection of tools as well as supplies, but we'll be happy if you bring some along yourself, too. If you are a Junghacker:in the same session earlier today may fit into your plans a little better, but if you want to join us for this session you're as welcome. strafpla.net (he/him) https://events.ccc.de/congress/2025/hub/event/detail/building-antennas-and-tinkering-with-them_az05 false 2025-12-28T12:00:00+01:00 12:00 12:00 SegFaultDragons Assembly 39c3-soldering-competition-day-2 de, en other Hand soldering competition This is a smd hand soldering competition - the goal is to solder a Winkekatze with some LED lights in the shortest time possible. Every contestant keeps the board and the overall top 3 win a prize. Contestants are expected to have smd soldering experience - beginners will not be able to finish within 90 minutes. For more details check out the competition's website: https://handsolderingcompetition.de/ https://events.ccc.de/congress/2025/hub/event/detail/soldering-competition-day-2 false 2025-12-28T11:30:00+01:00 11:30 01:00 Vegan Chaos Assembly 39c3-vegan-chaos-lets-talk-day-2 de, en other Komm vorbei und lasst uns in unserer Assembly quatschen! Dies ist die Zeit, wo die Community zusammenkommt, wo Interessierte stressfrei Fragen stellen können. **Come by and let's chat at our assembly!** This is the time when the community comes together, when anyone interested can ask questions in a relaxed atmosphere. Like-minded people, curious minds, motivated individuals, interested parties and many more meet here. Let's connect, all creatures are welcome! ### More Information: - To the **[Vegan Chaos Community Assembly](https://events.ccc.de/congress/2025/hub/en/assembly/detail/vegan_chaos)** - Follow us at Mastodon: **[@vegan@chaos.social](//chaos.social/@vegan)** ### Our Events: - 27.12. | 13:00 | Room D | **[Vegan Chaos: Welcome Meet & Greet](https://events.ccc.de/congress/2025/hub/en/event/detail/vegan-chaos-welcome-meet-greet_zdm4)** - 27.12. | 20:30 | Assembly | **[Vegan Chaos: Let's Talk](https://events.ccc.de/congress/2025/hub/en/event/detail/vegan-chaos-lets-talk-day-1)** - 28.12. | 11:30 | Assembly | **[Vegan Chaos: Let's Talk](https://events.ccc.de/congress/2025/hub/en/event/detail/vegan-chaos-lets-talk-day-2)** - 29.12. | 13:00 | Room D | **[Vegan Chaos: Bring-Along Fingerfood Brunch](https://events.ccc.de/congress/2025/hub/en/event/detail/vegan-chaos-bring-along-fingerfood-brunch)** - 29.12. | 18:30 | Assembly | **[Vegan Chaos: Let's Talk](https://events.ccc.de/congress/2025/hub/en/event/detail/vegan-chaos-lets-talk-day-3)** - 30.12. | 11:00 | Room 6 | **[Vegan Chaos: Farewell Meeting](https://events.ccc.de/congress/2025/hub/en/event/detail/vegan-chaos-farewell-meeting)** https://events.ccc.de/congress/2025/hub/https://usercontent.events.ccc.de/congress/2025/hub/usercontent/e/d12a1db24143/39C3veganchaos.png ganzesaetze (he/him) https://events.ccc.de/congress/2025/hub/event/detail/vegan-chaos-lets-talk-day-2 false 2025-12-28T12:00:00+01:00 12:00 01:30 KinkyGeeks Assembly 39c3-selbstgemachtes-leid-die-kinkygeeks-bastelwerkstat de, en other Bastelrunde für kinky Stuff We have prepared small craft kits that you can make during this time. You can choose between two different spanking tools, and you can also paint small tags made of shrink wrap, e.g., for collars or similar items. No registration necessary, just come by and see if there is a spot available. There are material costs of 0-5 €, depending on the set. raven (she/her) https://events.ccc.de/congress/2025/hub/event/detail/selbstgemachtes-leid-die-kinkygeeks-bastelwerkstat false 2025-12-28T11:00:00+01:00 11:00 01:30 Kidspace - Basteltische 39c3-bugelperlen-aber-anders de, en other Für Bügelperlen braucht es nicht unbedingt ein Bügeleisen. Normally, you'd use a pegboard and an iron for fuse beads. But you can also do it without... all you need is a needle and thread, and you can make bracelets or coasters. Want to know how? Come by, let me show you, and get started yourself. elzbeth https://events.ccc.de/congress/2025/hub/event/detail/bugelperlen-aber-anders false 2025-12-28T13:00:00+01:00 13:00 01:00 Kidspace - Basteltische 39c3-drehmeierbasteln de, en other https://drehmeier.de https://codeberg.org/fly_it/whizwheel/ Build your own little calculation tool. You can multiply and convert units. A "whiz wheel" is a circular sliderule, still used in aviation nowadays. Kids from the age of 10-16 years. https://events.ccc.de/congress/2025/hub/event/detail/drehmeierbasteln false 2025-12-28T16:00:00+01:00 16:00 01:30 Kidspace - Basteltische 39c3-nerds-spielen-spiele-tag-2 de, en other Nerds spielen Spiele Du hast gerade nichts zu tun, brauchst eine kleine Entspannungszeit oder suchst einfach ein wenig Spaß mit anderen? Spiel doch einfach mit! Jeder ist willkommen! Denn was tun Nerds, wenn sie gerade nichts hacken? Sie spielen Spiele! monsterchen https://events.ccc.de/congress/2025/hub/event/detail/nerds-spielen-spiele-tag-2 false 2025-12-28T11:00:00+01:00 11:00 00:45 Fediverse shared table 39c3-fediverse-als-business-grundungsideen-und-geschaft de other At Chaos Communication Camp 2023, padeluun called for the establishment of small, exciting companies. Digitalcourage operates a Fediverse instance that is financed by membership fees. In addition, there are commercial hosting services such as masto.host and Ossrox. What else is there, and what else is conceivable in the future? We discuss Fediverse business ideas, start-up assistance for company foundations (business plans, KfW start-up loans) and everything that can make the Fediverse an economic basis for founders. A workshop for gathering ideas, exchanging experiences and developing joint approaches. Recording of the presentation by padeluun 2023: https://media.ccc.de/v/camp2023-57118-fediverse https://events.ccc.de/congress/2025/hub/https://usercontent.events.ccc.de/congress/2025/hub/usercontent/e/85cc2c296501/fedihive.png sozialwelten (er/ihn) https://events.ccc.de/congress/2025/hub/event/detail/fediverse-als-business-grundungsideen-und-geschaft false 2025-12-28T11:45:00+01:00 11:45 00:45 Fediverse shared table 39c3-alternative-nutzungsweisen-von-microblogging_fbv4 de other When people say Mastodon, they often mean Fediverse—on the one hand because Mastodon represents a mainstream within the Fediverse, but on the other hand because even microblogging usage patterns can vary greatly and even within Mastodon there is no uniform usage pattern, which can make Mastodon seem confusing as a term. Automated posting of RSS feeds, personal exchanges with a closed community, global networking with peers from all over the world, or individual card index boxes—we categorize different ways of using the platform and draw inspiration from unusual approaches to uncover the relevance and potential of Fediverse. https://events.ccc.de/congress/2025/hub/https://usercontent.events.ccc.de/congress/2025/hub/usercontent/e/b7c2b021d6ad/altnutzung.png sozialwelten (er/ihn) https://events.ccc.de/congress/2025/hub/event/detail/alternative-nutzungsweisen-von-microblogging_fbv4 false 2025-12-28T16:00:00+01:00 16:00 01:00 Fediverse shared table 39c3-fediverse-treffen de other Wir wollen uns austauschen, um langfristig stabile Fediverse-Instanzen selber zu betreiben. What do I need to set up and maintain my own instance? What questions should I ask myself – preferably in advance? https://events.ccc.de/congress/2025/hub/https://usercontent.events.ccc.de/congress/2025/hub/usercontent/e/ee8c42d74959/Unbenannt.jpg MoniKa (c4E) (she/her) https://events.ccc.de/congress/2025/hub/event/detail/fediverse-treffen false 2025-12-28T17:00:00+01:00 17:00 00:45 Fediverse shared table 39c3-meet-up-bundnis-offene-netzwerke-meet-up-alliance- de, en other The alliance ‘Open Networks and Democratic Public Spheres’ was founded at the European Summit on Digital Sovereignty this November and is now supported by 30 organisations. We are campaigning for the promotion and use of decentralised, public-interest-oriented infrastructures with four demands. Come along, get to know us and our demands. https://events.ccc.de/congress/2025/hub/https://usercontent.events.ccc.de/congress/2025/hub/usercontent/e/03bb6a51439d/ONW-Ringlogo-300-trans.png samvie https://events.ccc.de/congress/2025/hub/event/detail/meet-up-bundnis-offene-netzwerke-meet-up-alliance- false 2025-12-28T13:00:00+01:00 13:00 00:40 cyber4EDU und Datenschutzheinis Assembly (c4E-Roundtable) 39c3-naturlich-bin-ich-18-wo-stehen-wir-beim-thema-alte de other Does the Internet need to be age aware? Ein kurzes Update darüber, was im letzten Jahr auf der politischen Bühne passiert ist und eine anschließende offene Diskussion darüber, wie es weitergehen kann. We usually encounter age verification checks online on pornography sites, gambling sites, or when we buy tobacco or alcohol online. There is much debate about whether this tool should also be used on other platforms. We usually encounter age verification checks online on pornography sites, gambling sites, or when we buy tobacco or alcohol online. There is much debate about whether this tool should also be used on other platforms. Following the social media ban in Australia and the Online Safety Act in the UK, the EU is also discussing a social media ban. I will give a short introduction to the political developments of the last year and then look forward to an open discussion. What does the expansion of age verification on the internet mean for you? In which Areas can age verification make sense? Or can it? How can age verification be designed technically? What are the pros and cons? What risks and opportunities are not discussed enough in current debate? (This discussion is a loose follow-up to the 38C3 Talk "Natürlich bin ich 18! Altersprüfungen im Netz" - You don't need to have seen the talk to participate here!) asypsilon (sie/ihr) https://events.ccc.de/congress/2025/hub/event/detail/naturlich-bin-ich-18-wo-stehen-wir-beim-thema-alte false 2025-12-28T14:00:00+01:00 14:00 01:30 cyber4EDU und Datenschutzheinis Assembly (c4E-Roundtable) 39c3-robo-rallye-spiele-fur-kids de other Wir spielen ein analoges Brettspiel mit bis zu 8 Kindern. In dem Spiel Robo Rallye steuerst du einen Roboter durch eine Fabrikhalle und lernst nebenbei die Grundlagen des Programmierens kennen. Alter: 10-18, max 8 Teilnehmende pnrd https://events.ccc.de/congress/2025/hub/event/detail/robo-rallye-spiele-fur-kids false 2025-12-28T18:30:00+01:00 18:30 01:00 cyber4EDU und Datenschutzheinis Assembly (c4E-Roundtable) 39c3-kann-das-schon-weg-workshop-wie-kann-ich-daten-bei de other Kann das schon weg? im Workshop zeigen wir, wie Ihr Daten, insbesondere Tracking-Daten, bei datensammelnden Webseiten, löschen lassen könnt. VIele Webseiten verarbeiten sehr detaillierte Nutzungsdaten und teilen diese teils mit hunderten „Partnern“. Was dort genau verarbeitet wird ist oftmals sehr unklar. Beim Landesbeauftragten für Datenschutz und Informationsfreiheit Baden-Württemberg haben wir ein Firefox-Plugin entwickelt, mit dem man prüfen kann, welche (Werbe-) Tracking-Daten und ähnliches die Webseite verarbeitet. Darauf erstellt das Plugin automatisch ein Auskunfts-Schreiben an den Webseitenbetreiber. Denn dieser ist nach Artikel 15 DS-GVO verpflichtet, betroffenen Personen mitzuteilen, welche Daten er und die von ihm eingesetzten Drittanbieter und Analytics-Tools verarbeiten. Bei dem Workshop zeigen wir das Plugin und unterstützen Euch dabei, bei den von Euch genutzten Webseiten Auskunfts- und Lösch-Anträge zu erstellen. Alvar tntrinh https://events.ccc.de/congress/2025/hub/event/detail/kann-das-schon-weg-workshop-wie-kann-ich-daten-bei false 2025-12-28T13:00:00+01:00 13:00 01:00 Haecksen-Assembly 39c3-fidgettoys-aus-alten-fahrradketten-all-creatures-w de Workshop Up-Cycling wörtlich genommen: Aus alten Fahrradketten entstehen verschiedene Fidgettoys zum Mitnehmen. Verschiedene Varianten können ausprobiert und Favoriten gleich selber nachgebaut werden. – Mit Anmeldung im Vorfeld. – Passend zum „Cycle“ im Kongresstitel zeige ich in diesem kleinen Workshop, wie aus alten Fahrradketten Fidgettoys gebastelt werden können. Im Vorfeld zeige ich einige verschiedene Varianten, die auch ausprobiert werden können, und dann geht es auch schon los. Geplant ist, dass jede Teilnehmer*in mit ein bis zwei Fidgettoys aus dem kurzen Workshop geht. Zusätzlich zu den Fahrradketten kommen Schlüsselringe und Schrumpfschlauch zum Einsatz, aber nicht bei allen Varianten. Da es sich wirklich um alte Fahrradketten handelt, die ich zwar etwas vorreinige, macht es dennoch die Hände schmierig und dreckig. Es wird aber Babyfeuchttücher geben und einen Pott Handwaschcreme, der für solche Zwecke gut funktioniert, damit nachher alle wieder saubere Hände haben. Dieser Workshop ist für alle ab 16. Ich werde im Vorfeld Listen zum Eintragen aufhängen. Geplant sind zwei kürzere Workshop-Slots zu je 30 Minuten in Gruppen von sechs bis acht Personen. neon_mate https://events.ccc.de/congress/2025/hub/event/detail/fidgettoys-aus-alten-fahrradketten-all-creatures-w https://pretalx.c3voc.de/39c3-haecksen-workshops-2025/talk/7AH7RL/ Verschiedene Fidgettoys aus alten Fahrradketten https://pretalx.c3voc.de/39c3-haecksen-workshops-2025/talk/7AH7RL/feedback/ false 2025-12-28T20:00:00+01:00 20:00 01:00 Haecksen-Assembly 39c3-katzen-ohrchen-selber-basteln-all-creatures-welcom de Workshop Ihr wollt Katzenohren selber basteln? Kommt vorbei uns lernt, wie es geht. Ihr wollt Katzenohren selber basteln? Kommt vorbei uns lernt, wie es geht. Wir brauchen mehr Katzenohren auf dem Congress und ihr könnt jetzt hier noch eure eigenen machen. Meow Miau mauz miez! purrrrr! brrrrb. Meow Miau mauz miez! purrrrr! brrrrb. Meow Miau mauz miez! purrrrr! brrrrb. Meow Miau mauz miez! purrrrr! brrrrb. Meow Miau mauz miez! purrrrr! brrrrb. Meow Miau mauz miez! purrrrr! brrrrb. Meow Miau mauz miez! purrrrr! brrrrb. Meow Miau mauz miez! purrrrr! brrrrb. und ihre alle pspspspsppsss Franzi https://events.ccc.de/congress/2025/hub/event/detail/katzen-ohrchen-selber-basteln-all-creatures-welcom https://pretalx.c3voc.de/39c3-haecksen-workshops-2025/talk/7THCRV/ https://pretalx.c3voc.de/39c3-haecksen-workshops-2025/talk/7THCRV/feedback/ false 2025-12-28T14:00:00+01:00 14:00 00:45 DigiGes shared table 39c3-digital-o-mat-kick-off de other Im Jahr 2026 findet in Berlin die nächste Wahl zum Abgeordnetenhaus statt. Wie stehen die dort antretenden Parteien zu Digital-Themen? Und wie lässt sich die Übereinstimmung mit eigenen Überzeugungen "berechnen"? Wie geht eins mit faschistischen Parteien um und welche anderen Details gilt es zu beachten? Der kleindatenverein.org hat bereits mehrere Digital-O-maten gebaut und wird auch zur Berliner Wahl 2026 einen anbieten. Nach einer Vorstellung möglicher Arten von Wahl-O-Maten, wollen wir uns für ein Modell entscheiden, die nächsten Schritte festlegen und idealerweise den ersten Code einschecken. Wer mitmachen oder auch einfach nur mal reinschnuppern will, ist herzlich willkommen. Keine Vorkenntnisse nötig. Leute aus anderen Bundesländern, in denen 2026 gewählt wird und die Interesse am Bau eines Digital-O-Maten haben, sind besonders willkommen. e-punc (der / he) https://events.ccc.de/congress/2025/hub/event/detail/digital-o-mat-kick-off false 2025-12-28T19:00:00+01:00 19:00 01:00 DigiGes shared table 39c3-nicht-schon-wieder-vorratsdatenspeicherung de other Vernetzungstreffen, um uns (wieder mal) gegen die geplante Vorratsdatenspeicherung zur Wehr zu setzen German meet-up on fighting back against the new proposal for data retention in Germany. https://events.ccc.de/congress/2025/hub/https://usercontent.events.ccc.de/congress/2025/hub/usercontent/e/79644d787c5e/Event-VDS_3Nhfpci.png tyncet e-punc (der / he) pneutig https://events.ccc.de/congress/2025/hub/event/detail/nicht-schon-wieder-vorratsdatenspeicherung false 2025-12-28T11:30:00+01:00 11:30 00:40 Workshoparea Chaos Mauldasch 39c3-glasfaser-spleiworkshop-junghackerinnentag-edition de other Du wolltest schon immer mal wissen, wie eine Glasfaser aufgebaut ist und miteinander verbunden wird? Dann bist du hier richtig. Dieser Slot ist exklusiv für JHT-Teilnehmende (Junghacker:innen-Tag). Zunächst erhältst du eine kurze generelle Erklärung, wie ein Splice funktioniert, auf was es dabei ankommt und was noch rings rum passiert. Anschließend kannst du das Glasfaserspleißen selbst ausprobieren. Du solltest grundsätzliches Interesse für die Thematik, ein wenig Geduld und ein ruhiges Händchen mitbringen. Spleißen bezeichnet den Vorgang, durch den Faser-Enden einer Glasfaserkabel miteinander verbunden werden. Bei Singlemode-Glasfasern beträgt der Kerndurchmesser der eigentlichen Glasfaser 9µm und ist damit kleiner als ein menschliches Haar. WICHTIG!!! - Dieser Slot ist exklusiv für den Junghacker:innen-Tag. Weitere Slots auch bei der Selfnet-Assembly (gleiches Cluster) - Es gibt nur wenige Plätze. First come, first serve. Empfohlen ab 12 Jahren Begleitung der Eltern nicht notwendig https://events.ccc.de/congress/2025/hub/https://usercontent.events.ccc.de/congress/2025/hub/usercontent/e/e4cbf5a93362/2df7df2d-d39f-4d09-bf2c-3356e2d26c78.jpg Patrick https://events.ccc.de/congress/2025/hub/event/detail/glasfaser-spleiworkshop-junghackerinnentag-edition false 2025-12-28T14:00:00+01:00 14:00 01:00 TBD small 39c3-tbd-badge-soldering-workshops en, de other TBD friends badge soldering workshop https://github.com/hackwinkel/ There are some version 1.5 and version 2.0 TBD friends badges left to solder. Badges contain blinking lights and 2-way communication, so the badge can tell you if there are friends around that also wear their TBD friends badge. Soldering is done using solder paste and a hotplate. Takes about 1 hour for beginners (which mainly depends on my divergence when I talk you through it). Record time is 12 minutes. Badges are donation-ware - Pay whatever you like. Materials costs are currently about 2 euro https://github.com/hackwinkel/ https://events.ccc.de/congress/2025/hub/https://usercontent.events.ccc.de/congress/2025/hub/usercontent/e/d619de5f1be1/tbdbadge.png the0 (he his him) https://events.ccc.de/congress/2025/hub/event/detail/tbd-badge-soldering-workshops false 2025-12-28T14:00:00+01:00 14:00 02:00 Kidspace - Tisch vor Saal B 39c3-geschichten-erzahlen-tag-2-zauberschule-ethikexkur de other Zauberschule: Ethikexkursion Ihr braucht noch eine Prüfung in Ethik, und deshalb müsst ihr komplizierte Problemen mit gefährlichen Wesen lösen, und dabei alles richtig machen. (Rollenspiel ohne Regelsystem, 2 Stunden, bis zu 6 Leute, auf Deutsch) Cisz (er, he) https://events.ccc.de/congress/2025/hub/event/detail/geschichten-erzahlen-tag-2-zauberschule-ethikexkur false 2025-12-28T16:00:00+01:00 16:00 01:00 Kidspace - Tisch vor Saal B 39c3-papierbasteln-tag-2 de other Ein kleiner Berg (1 Stunde, Material und Werkzeug sind vorhanden) Cisz (er, he) https://events.ccc.de/congress/2025/hub/event/detail/papierbasteln-tag-2 false 2025-12-28T11:00:00+01:00 11:00 05:00 Kidspace - Elektrotisch 39c3-elektrobausteine-tag-2 de, en other Elektrobausteine/Electric circuits with building blocks Make light sound or mechanical circuits. The electronic building blocks from OEM Dbolo are not only especially child-friendly due to their simple push-button connections but also a lot of fun for all ages. They are distributed by various brands, including "Kosmos Easy" and "Elenco Snap Circuits." No prior knowledge of electricity is required, but beware - learning something might happen! This is an open parent-child activity. Learn, build, and play together, and take care for arguments and that the parts don’t fall on the floor. Teenagers and adults are also welcome without child accompaniment. ;-) https://events.ccc.de/congress/2025/hub/event/detail/elektrobausteine-tag-2 false 2025-12-28T12:00:00+01:00 12:00 00:45 CADUS WASH-Station 39c3-wash-sprechstunde_uewf de, en other CADUS WASH Station – Water, Sanitation, and Hygiene A compact insight into water treatment in action: with a water filter system, small water laboratory, and short WASH consultation hours. To look at, touch, and ask questions. Come to our regular WASH consultation hours, ask your questions, and get a practical insight into simple water treatment and hygiene solutions in use. https://events.ccc.de/congress/2025/hub/event/detail/wash-sprechstunde_uewf false 2025-12-28T12:00:00+01:00 12:00 00:30 Rope-Rescue 39c3-kids-rope-rescue de, en other Kids-Rope-Rescue Kids-Rope-Rescue Anna-Lea https://events.ccc.de/congress/2025/hub/event/detail/kids-rope-rescue false 2025-12-28T13:00:00+01:00 13:00 00:30 FNF Assembly 39c3-introduction-to-fnf_037p en other An introductory talk for people unfamiliar with FreedomNotFear, stating the goals and purpose of the organization, the event itself and idiosyncratic, open format. Similar organizations may also be brought up for context. An overview on where we are as Europeans, and as a global community on the stance of privacy, digital rights, and current law/policy and its stated vs (real)potential goals and effects. Finally a section where participants are invited to speak briefly on whats going on in their country and how they see people's rights being affected. Freedom Not Fear https://events.ccc.de/congress/2025/hub/event/detail/introduction-to-fnf_037p false 2025-12-28T14:00:00+01:00 14:00 01:00 FNF Assembly 39c3-datenschutzrechte-zum-mitmachen-dsgvo-anfragen-ste de Workshop Die DSGVO ist in aller Munde, aber was bedeutet sie eigentlich für Dich? Wir wollen uns die Rechte, die Dir durch die DSGVO zugesichert werden, einmal genauer anschauen und – vor allem — ausprobieren. In unserem Workshop lernst Du, mit Datenanfragen.de Anfragen zu stellen, um an Deine Daten zu kommen, sie löschen zu lassen, zu berichtigen oder Widerspruch gegen Direktwerbung einzulegen. Online-Shops, Streamingdienste, Banken, Handy-Apps, öffentliche Stellen, Versicherungen, soziale Netzwerke … Die Liste an Organisationen, die Deine Daten haben wollen, ist sehr lang. Wahrscheinlich gibt es sogar etliche Unternehmen wie Adresshändler und Auskunfteien, die zwar Deine Daten haben, von denen Du aber noch nie etwas gehört hast. Zum Glück musst Du Dich nicht damit abfinden, „dass das halt so ist“. Denn Du hast ein Recht auf Datenschutz! Wenn Unternehmen, Behörden und andere Organisationen Deine personenbezogenen Daten nutzen wollen, müssen sie sich dabei an die Datenschutz-Grundverordnung (DSGVO) halten. Damit Du die Kontrolle über Deine Daten behalten kannst, gewährt Dir die DSGVO eine Reihe von Rechten, die Du den Organisationen gegenüber kostenlos geltendmachen darfst: Das Recht auf Auskunft darüber, welche Daten zu Dir verarbeitet werden, einschließlich einer Kopie dieser Daten, das Recht auf Berichtigung unrichtiger Daten zu Dir, das Recht auf Löschung Deiner Daten unter bestimmten Umständen, und das Recht auf Werbewiderspruch. Wir sind ein gemeinnütziger Verein, der daran arbeitet, diese Rechte allen Menschen zugänglich zu machen. Dafür betreiben wir vor allem die Webseite Datenanfragen.de, die Dich durch den gesamten Anfragenprozess leitet und am Ende den Anfragentext generiert, den Du nur noch an die entsprechenden Organisationen abschicken musst. In diesem Workshop wollen wir Dich einladen, von Deinen Rechten Gebrauch zu machen und mehr darüber zu erfahren, wer welche Daten zu Dir hat. Dazu erklären wir Dir näher, was es mit Deinen Datenschutzrechten und unseren Werkzeugen auf sich hat und stellen dann gemeinsam Anfragen. Keine Sorge: Du brauchst dafür keine technischen oder rechtlichen Vorkenntnisse. Lorenz Benni https://events.ccc.de/congress/2025/hub/event/detail/datenschutzrechte-zum-mitmachen-dsgvo-anfragen-ste https://fnf-39c3-pretalx.my-server.in/fnf-at-39c3-2025/talk/BTCAAA/ https://fnf-39c3-pretalx.my-server.in/fnf-at-39c3-2025/talk/BTCAAA/feedback/ false 2025-12-28T20:30:00+01:00 20:30 01:00 FNF Assembly 39c3-widerspruch-gegen-die-elektronische-patienten_8y3v de other Bei uns kannst Du sehr einfach Deiner ePA widersprechen. Hierfür haben wir für Dich ein Formular vorbereitet, dass Du ausfüllst, wir schicken das dann an Deine Krankenkasse. Das geht auch außerhalb unserer "Sprechzeiten", komm einfach jederzeit vorbei, auch wenn wir nicht da sind liegt eine Anleitung aus wie das funktioniert. Darüber hinaus bieten wir noch andere Widersprüche und Auskünfte an. Als gesetzlich Versicherter hast Du Anfang 2025 eine ePA erhalten, in der fortan alle Deine Behandlungsdaten (Diagnosen, Medikamente, Zahnbehandlungen, ...) protokolliert werden. Wir raten zum Widerspruch und helfen gerne dabei und stehen für Fragen zur Verfügung. Darüber hinaus bieten wir Widerspruchsformulare gegen das Durchsuchen Deiner Abrechnungsdaten durch die Krankenkassen an. Damit will die Krankenkasse auf Basis Deiner persönlichen Daten ein sog. Risikoprofil für Dich erstellen. Außerhalb unserer "Sprechzeiten" findest Du an unserem Stand eine Anleitung, die Dir zeigt wie Du Deiner ePA widersprechen kannst. Alternativ kannst Du auch unseren Widerspruchsgenerator dafür nutzen, den Du auf unserer Webseite 'https://widerspruch-epa.de' findest. Zusätzlich kannst Du auch eine Auskunft bei Deiner Krankenasse zu allen dort vorliegenden Daten von Dir machen. flysch https://events.ccc.de/congress/2025/hub/event/detail/widerspruch-gegen-die-elektronische-patienten_8y3v false 2025-12-28T11:00:00+01:00 11:00 02:00 Sendezentrum Podcast-Tisch 39c3-podcasting-fur-einsteigerinnen de other Podcasting ist mittlerweile sehr bekannt – also warum nicht selbst mal podcasten? Das Sendezentrum bietet euch die Möglichkeit, in einem Workshop einen Podcast aufzunehmen und bis zur Veröffentlichungsreife zu bearbeiten. Podcasting ist mittlerweile sehr bekannt – also warum nicht selbst mal podcasten? Das Sendezentrum bietet euch die Möglichkeit, in einem Workshop einen Podcast aufzunehmen und bis zur Veröffentlichungsreife zu bearbeiten. Dabei stehen euch erfahrene Podcaster*innen zur Seite. Es gibt zwei Termine, die beide denselben Workshop beinhalten. Die Anmeldung findet jeweils von 11:00 bis 11:15 bzw. von 13:30 bis 13:45 Uhr im Sendezentrum statt. Bitte dafür vorbeikommen. Hinweis: Zum Schutz der Privatsphäre der Teilnehmenden werden die Aufnahmen direkt nach dem Workshop gelöscht und können daher NICHT mitgenommen werden. Teilnehmer*innen: max. 6 pro Slot Alter: ab 10 Anmeldung bei: rupi42ai (DECT: 6032) https://events.ccc.de/congress/2025/hub/https://usercontent.events.ccc.de/congress/2025/hub/usercontent/e/4ed888af392e/logo_s.png Bernd https://events.ccc.de/congress/2025/hub/event/detail/podcasting-fur-einsteigerinnen false 2025-12-28T13:00:00+01:00 13:00 02:00 Sendezentrum Podcast-Tisch 39c3-podcasting-fur-einsteigerinnen_8uu8 de other Podcasting ist mittlerweile sehr bekannt – also warum nicht selbst mal podcasten? Das Sendezentrum bietet euch die Möglichkeit, in einem Workshop einen Podcast aufzunehmen und bis zur Veröffentlichungsreife zu bearbeiten. Podcasting ist mittlerweile sehr bekannt – also warum nicht selbst mal podcasten? Das Sendezentrum bietet euch die Möglichkeit, in einem Workshop einen Podcast aufzunehmen und bis zur Veröffentlichungsreife zu bearbeiten. Dabei stehen euch erfahrene Podcaster*innen zur Seite. Es gibt zwei Termine, die beide denselben Workshop beinhalten. Die Anmeldung findet jeweils von 11:00 bis 11:15 bzw. von 13:30 bis 13:15 Uhr im Sendezentrum statt. Bitte dafür vorbeikommen. Hinweis: Zum Schutz der Privatsphäre der Teilnehmenden werden die Aufnahmen direkt nach dem Workshop gelöscht und können daher NICHT mitgenommen werden. Teilnehmer*innen: max. 6 pro Slot Alter: ab 10 Anmeldung bei: rupi42ai (DECT: 6032) https://events.ccc.de/congress/2025/hub/https://usercontent.events.ccc.de/congress/2025/hub/usercontent/e/991300e3b9bf/logo_s.png Bernd https://events.ccc.de/congress/2025/hub/event/detail/podcasting-fur-einsteigerinnen_8uu8 false 2025-12-28T15:30:00+01:00 15:30 00:45 Sendezentrum Podcast-Tisch 39c3-digital-humanities-auf-dem-39c3-sendezentrum_28ux de Podcast-Tisch Wir haben zwei Slots am Sendezentrum Podcast-Tisch gebucht um eure Stimmen zu den DH auf dem 39C3 unter professionellen Bedingungen aufzufangen und ON AIR zu bringen. Kommt vorbei und lasst euch überraschen. Ulrike diskutiert am liebsten über Datentracking in der Wissenschaft, aber auch andere Themen sind willkommen. Wer es nicht zum Tisch schafft, spricht Ulrike am besten dezentral an. Ulrike Wuttke Torsten Roeder https://events.ccc.de/congress/2025/hub/event/detail/digital-humanities-auf-dem-39c3-sendezentrum_28ux https://pretalx.c3voc.de/39c3-sendezentrum/talk/Q7DSV8/ https://pretalx.c3voc.de/39c3-sendezentrum/talk/Q7DSV8/feedback/ false 2025-12-28T16:30:00+01:00 16:30 00:45 Sendezentrum Podcast-Tisch 39c3-studio-drolf de Podcast-Tisch Podcast-Aufzeichnung des Studio Drölf https://events.ccc.de/congress/2025/hub/event/detail/studio-drolf https://pretalx.c3voc.de/39c3-sendezentrum/talk/LXE8T3/ https://pretalx.c3voc.de/39c3-sendezentrum/talk/LXE8T3/feedback/ false 2025-12-28T19:00:00+01:00 19:00 00:45 Sendezentrum Podcast-Tisch 39c3-die-sicherheits_lucke-live-vom-39c3-die-wissenscha de Podcast-Tisch Die **Sicherheits_lücke** (https://sicherheitsluecke.fm) greift aktuelle Ereignisse und Trends der Cybersecurity auf. Im Podcast werden die Themen - gerne auch mal humoristisch, sarkastisch oder selbstironisch - von Volker Skwarek, Monina Schwarz und Ingo Timm mit Tiefgang aufbereitet. Mit dem Format **live** ist der Podcast auch regelmäßig auf Kongressen zu finden und diskutiert interessante Vorträge mit ausgewählten Gästen. Wir berichten mit den Gästen Prof. Dr. Christoph Saatjohann von der FH Münster und Prof. Dr. Gerd Beuster von der FH Wedel über interessante Vorträge und Events am zweiten Tag des 39c3 (28.12.2025). https://pretalx.c3voc.de/media/39c3-sendezentrum/submissions/CXA7HZ/HOOU_Cover-Sicherheitsluec_iwrbW67.webp Volker https://events.ccc.de/congress/2025/hub/event/detail/die-sicherheits_lucke-live-vom-39c3-die-wissenscha https://pretalx.c3voc.de/39c3-sendezentrum/talk/CXA7HZ/ https://pretalx.c3voc.de/39c3-sendezentrum/talk/CXA7HZ/feedback/ false 2025-12-29T11:00:00+01:00 11:00 00:40 One 39c3-greenhouse-gas-emission-data-public-difficult-to-access-and-not-always-correct en Science Talk Data about greenhouse gas emissions, both from countries and individual factories, is often publicly available. However, the data sources are often not as accessible and reliable as they should be. EU emission databases contain obvious flaws, and nobody wants to be responsible. Which factory in my city is the largest emitter of CO2? Which industrial sector is responsible for the largest share of a country's contribution to climate change? It should not be difficult to answer these questions. Public databases and reporting required by international agreements usually allow us to access this data. However, trying to access and work with these datasets — or, shall we say, Excel tables — can be frustrating. UN web pages that prevent easy downloads with a "security firewall", barely usable frontends, and other issues make it needlessly difficult to gain transparency about the sources of climate pollution. While working with official EU datasets, the speaker observed data points that could not possibly be true. Factories suddenly dropped their emissions by orders of magnitude without any explanation, different official sources report diverging numbers for the same emission source, and responsible European and National authorities appear not to care that much. The talk will show how to work with relevant greenhouse gas emission data sources and how we can access them more easily by converting them to standard SQL tables. Furthermore, we will dig into some of the strange issues one may find while investigating emission datasets. # Background / Links * Why is it needlessly difficult to access UNFCCC Emission Data? [https://industrydecarbonization.com/news/why-is-it-needlessly-difficult-to-access-unfccc-emission-data.html](https://industrydecarbonization.com/news/why-is-it-needlessly-difficult-to-access-unfccc-emission-data.html) * UNFCCC Emission Data Downloads: [https://industrydecarbonization.com/docs/unfccc/](https://industrydecarbonization.com/docs/unfccc/) * Code (Docker, MariaDB/MySQL, phpMyAdmin) to easily access EU emisison data: [https://github.com/decarbonizenews/ghgsql](https://github.com/decarbonizenews/ghgsql) * Errors and Inconsistencies in European Emission Databases: [https://industrydecarbonization.com/news/errors-and-inconsistencies-in-european-emission-data.html](https://industrydecarbonization.com/news/errors-and-inconsistencies-in-european-emission-data.html) * Slides: [https://slides.hboeck.de/39c3-climatedata/](https://slides.hboeck.de/39c3-climatedata/) https://cfp.cccv.de/media/39c3/submissions/FUKKM3/arcelormittaldunkirkco2_3LA9WaR_XAimLLb_cOjgrZO.webp Hanno Böck https://events.ccc.de/congress/2025/hub/event/detail/greenhouse-gas-emission-data-public-difficult-to-access-and-not-always-correct Slides https://cfp.cccv.de/39c3/talk/FUKKM3/ Slides (PDF) https://cfp.cccv.de/39c3/talk/FUKKM3/feedback/ false 2025-12-29T11:55:00+01:00 11:55 00:40 One 39c3-celestial-navigation-with-very-little-math en Hardware Talk Learn how to find your position using a sextant and a custom slide rule, almost no math required! Since the dawn of time people have asked themselves: where am I and why am I here? This talk won't help you answer the why question, but it will discuss how determine the where in the pre-GPS age of sextants, slide rules and stopwatches by taking the noon sight, aka the meridian passage. The usual way to find your position using the Sun requires a large almanac of lookup tables and some challenging math. The books are frustrating to consult on every sight and the base 60 degree-minute-second math is frustrating even with a calculator, and if you're on a traditional ship it seems wrong to do traditional navigation with electronic devices. To speed up the process I’ve designed a specialized circular slide rule that handles most of the table lookups to correct height of eye, semi-diameter, temperature, refraction and index errors, and also simplifies the degree-minute-second arithmetic required to calculate the exact declination of the Sun. In this talk I’ll demonstrate how to make your own printable paper slide rule and use it to reduce the meridian passage measurement to a lat/lon with just a few rotations of the wheels and pointer, no electronics or bulky books necessary! https://cfp.cccv.de/media/39c3/submissions/DVKRSC/IMG_6736_preview_r6BFUP2_lECPvlG_hVhkUvg.webp Trammell Hudson https://events.ccc.de/congress/2025/hub/event/detail/celestial-navigation-with-very-little-math https://cfp.cccv.de/39c3/talk/DVKRSC/ SVG for the solar sliderule https://cfp.cccv.de/39c3/talk/DVKRSC/feedback/ false 2025-12-29T12:50:00+01:00 12:50 00:40 One 39c3-what-makes-bike-sharing-work-insights-from-43-million-kilometers-of-european-cycling-data en Science Talk Bike- and e-bike-sharing promise sustainable, equitable mobility - but what makes these systems successful? Despite hundreds of cities operating thousands of shared bikes, trip data is rarely public. To address this, we built a geospatial analysis pipeline that reconstructs trip data from publicly accessible system status feeds. Using this method, we gathered **43 million km** of bike-sharing trips across **268 European cities**. Combined with over **100 urban indicators** per city, our analyses reveal how infrastructure, climate, demographics, operations, and politics shape system performance. We uncover surprising insights - such as why some e-bike systems underperform despite strong demand - and highlight how cities can design smarter, fairer mobility. All data and code are open-source, with an interactive demo at bikesharingflowmap.de. We are Felix, Georg, and Martin - each of us working professionally in different research and data areas, ranging from the future of mobility to computational fluid dynamics and machine learning. What unites us is our shared interest in **quantitative traffic analyses**. Building on earlier small-scale studies focused on individual cities, we set out to launch a project that captures shared bike system data across Europe - from regular bikes to e-bikes. In our study, which led to an **[open-access scientific publication](https://doi.org/10.1007/s11116-025-10661-2)**, we scraped shared bike data across Europe at a **minute-by-minute level** over many months, accumulating **more than 43 million records**. We analyze **behavioural and systemic patterns** to understand what makes a bike-sharing system useful and successful within a city. As such, this evidence-based research fits very well with the **39C3 Science track** and the theme of "**Power Cycles**" as we dissect the complex energy and usage cycles that define urban mobility and sustainable futures for everyone. We bridge the gap between urban planning, socioeconomics, and technology by applying statistical modeling and engineering knowledge to a large-scale mined dataset. Join us to learn whether right-wing politics stall sustainable mobility, or which climate e-bikes feel most comfortable in! We love going the extra mile and therefore provide a live, interactive demo that everyone can use to explore and understand traffic flows: [bikesharingflowmap.de](https://bikesharingflowmap.de/). Therefore, attendees will be able to play with the data in a self-service way. We also provide all code on GitHub and the complete dataset on HuggingFace. And, of course, we will also discuss how both bike-sharing operators and our boss reacted when we told them about the dataset we already had collected (spoiler: lawyers were involved, yet it’s still available for downloads…). https://cfp.cccv.de/media/39c3/submissions/L98WRF/Screenshot_from_2025-10-22_21-18-05_Rip_Wqtzdto.webp Martin Lellep Georg Balke Felix Waldner https://events.ccc.de/congress/2025/hub/event/detail/what-makes-bike-sharing-work-insights-from-43-million-kilometers-of-european-cycling-data Website with webtool & all important links https://cfp.cccv.de/39c3/talk/L98WRF/ Slides https://cfp.cccv.de/39c3/talk/L98WRF/feedback/ false 2025-12-29T13:50:00+01:00 13:50 00:40 One 39c3-wer-hat-angst-vor-dem-neutralitatsgebot de Ethics, Society & Politics Talk Wer überhaupt „neutral“ sein muss, was das bedeutet, und wer sich jetzt wehren muss. „Neutralität“ wird zum neuen Kampfbegriff: Weil sie gegen die menschenfeindliche Politik von Friedrich Merz protestieren, wirft die CDU Gruppen wie Omas gegen Rechts, Greenpeace und Correctiv vor, nicht neutral zu sein. Unter Berufung auf ein angeblich verletztes Neutralitätsgebot werden staatliche Förderungen gestrichen und NGOs geraten unter Beobachtung des Verfassungsschutzes. Julia Klöckner verbietet im Namen der „Neutralität“ Palestine-Shirts, Anstecknadeln und Regenbogenflaggen im Parlament. Die AfD fordert dazu auf, Lehrkräfte zu melden, die sich gegen Rechtsextremismus einsetzen oder entsprechende Positionen innerhalb der AfD kritisieren. Doch was steckt dahinter? Was bedeutet das sogenannte Neutralitätsgebot – und für wen gilt es überhaupt? Und für wen gilt es nicht? Zivilcourage kann nicht neutral sein – und soll es auch nicht sein. Genauso wie AfD-Hetze gegen Migrant*innen nicht „neutral“ ist, ist die Kritik menschenfeindlicher Äußerungen nicht nur legitim, sondern Pflicht demokratischer Bürger*innen. Das Beschwören eines „Neutralitätsgebots“ für NGOs ist ein durchschaubarer, aber gefährlicher Versuch, sie der eigenen Position zu unterwerfen. Die Rechtsanwältinnen Vivian Kube und Hannah Vos erklären den verfassungsrechtlichen Hintergrund, zeigen die autoritären Strategien hinter dem Ruf nach „Neutralität“ auf und geben Tipps, wie man sich dagegen wehren kann. Sie engagieren sich im Projekt Gegenrechtschutz, um demokratische Prinzipien und Betroffene vor rechtlichen Angriffen zu verteidigen. Hannah Vos Vivian Kube https://events.ccc.de/congress/2025/hub/event/detail/wer-hat-angst-vor-dem-neutralitatsgebot https://cfp.cccv.de/39c3/talk/JBPZLJ/ https://cfp.cccv.de/39c3/talk/JBPZLJ/feedback/ false 2025-12-29T14:45:00+01:00 14:45 01:00 One 39c3-supplements-und-social-media-wenn-der-online-hype-zur-realen-gesundheitsgefahr-wird de Science Talk Nicht zuletzt durch die Werbung in den sozialen Medien werden in Deutschland immer mehr Nahrungsergänzungsmittel verkauft. Einige Influencer bringen sogar ihre eigenen Präparate auf den Markt. Gleichzeitig häufen sich Fälle, in denen die Einnahme von vermeintlich harmlosen „Supplements“ zu Gesundheitsschäden geführt hat. Der Vortrag will daher die Mechanismen hinter dem Supplement-Hype aufzeigen, zudem erklären, warum aktuell ein ausreichender Verbraucherschutz insbesondere im Internet nicht gewährleistet werden kann, wo Handlungsbedarf für die Politik besteht und wie man sich selbst vor fragwürdigen Produkten schützen kann. Der Markt für Nahrungsergänzungsmittel boomt seit Jahren. Dafür sorgen unter anderem verschiedenste Influencer, die die Präparate in den sozialen Medien bewerben. Statt nur Produkte der großen Player in diesem Bereich anzupreisen, wie More Nutrition, ESN oder Holy Energy, haben einige Influencer mittlerweile sogar ihre eigenen Nahrungsergänzungsmittelmarken auf den Markt gebracht. Versprochen wird dabei vieles: Pre-Workout-Booster sollen die Leistung beim Krafttraining erhöhen und blitzschnell zum Traumkörper verhelfen, während Gaming-Booster Wachheit und eine Top-Performance beim Zocken versprechen. Wieder andere Kapseln oder auch Gummibärchen sollen für eine makellose Haut oder einen ruhigen Schlaf sorgen. Manche Präparate können angeblich sogar Krankheiten vorbeugen oder heilen. Doch was steckt tatsächlich in diesen Mitteln, die online regelrecht gehypt werden? Rein rechtlich handelt es sich um Lebensmittel, was wiederum bedeutet, dass sie ohne behördliche Zulassung auf den Markt gebracht werden dürfen. Es genügt schon, wenn der Unternehmer für die Sicherheit garantiert. Die Hürden für einen Marktzutritt sind damit denkbar niedrig, während gleichzeitig Gewinnmargen locken, die sogar den illegalen Drogenhandel übertreffen. Das Ergebnis zeigt sich in den Berichten der amtlichen Lebensmittelüberwachung: Bei den Proben, die das Niedersächsische Landesamt für Verbraucherschutz und Lebensmittelsicherheit im Jahr 2024 untersucht hat, entsprachen rund neun von zehn Proben (89 %) nicht den rechtlichen Vorgaben. Neben Mängeln bei der Kennzeichnung und Bewerbung, wodurch Verbraucher viel Geld für wirkungslose Pulver ausgeben, ist die stoffliche Zusammensetzung der Produkte besonders kritisch. So kann beispielsweise die Einnahme von überdosierten Vitamin-D-Präparaten zu Störungen des Calciumstoffwechsels führen (sog. Hypercalcämien). Vermeintlich harmlose pflanzliche Präparate, wie Kurkuma oder Ashwaganda, können zu Leberschäden bis hin zum Leberversagen führen. Besonders brisant ist dabei, dass die Wahrscheinlichkeit für die Erforderlichkeit einer Lebertransplantation oder den Tod des Patienten höher ist als bei Leberschäden durch Arzneimittel (83 vs. 66 %). Es kommen also Menschen durch die Einnahme von Präparaten zu Schaden, mit deren Hilfe sie ihrer Gesundheit eigentlich etwas Gutes tun wollten. Der Vortrag beleuchtet daher die aktuelle Marktsituation unter besonderer Berücksichtigung des Influencer-Marketings kritisch, erklärt den Unterschied zwischen Nahrungsergänzungs- und Arzneimitteln und stellt die rechtlichen Rahmenbedingungen für das Inverkehrbringen und die Bewerbung von Nahrungsergänzungsmitteln dar. Zudem wird aufgezeigt, warum ein ausreichender Verbraucherschutz durch die aktuellen Möglichkeiten des Lebensmittelrechts insbesondere im Internet nicht gewährleistet werden kann, wo Handlungsbedarf für die Politik besteht und wie man sich selbst vor fragwürdigen Produkten schützen kann. Christoph Wiedmer https://events.ccc.de/congress/2025/hub/event/detail/supplements-und-social-media-wenn-der-online-hype-zur-realen-gesundheitsgefahr-wird https://cfp.cccv.de/39c3/talk/8MPJXK/ https://cfp.cccv.de/39c3/talk/8MPJXK/feedback/ false 2025-12-29T16:00:00+01:00 16:00 01:00 One 39c3-gegenmacht-best-of-informationsfreiheit de Ethics, Society & Politics Talk Sind mehr Infos wirklich die Lösung? Ob Jens Spahn, Philipp Amthor oder Friedrich Merz - sie alle sagen offen, was sie vorhaben und machen keinen Hehl aus ihren Verbindungen zur Trump-Regierung, zu Milliardären und der fossilen Lobby. Was bringt Transparenz in Zeiten der autoritären Wende? Transparenz braucht Rechenschaft. Ohne Konsequenzen bleibt Transparenz wirkungslos. Wie können wir also eine wirksame Gegenmacht schaffen, die Veränderungen durchsetzt? Philipp Amthors Angriff aufs Informationsfreiheitsgesetz konnten wir erst einmal abwehren - jetzt geht's in die Offensive! Mit den Highlights aus Strafanzeigen gegen Alexandeer Dobrindt, Spahns geleaktem Maskenbericht, der Milliardärslobby im Wirtschaftsministerium und allen Steueroasen in Deutschland. Arne Semsrott https://events.ccc.de/congress/2025/hub/event/detail/gegenmacht-best-of-informationsfreiheit https://cfp.cccv.de/39c3/talk/J88RFE/ https://cfp.cccv.de/39c3/talk/J88RFE/feedback/ false 2025-12-29T17:15:00+01:00 17:15 01:00 One 39c3-schlechte-karten-it-sicherheit-im-jahr-null-der-epa-fur-alle de Security Talk Seit Mitte 2025 steht die elektronische Patientenakte für alle zur Verfügung – nach ein paar kleineren oder größeren Sicherheitsproblemen im Vorfeld, sei es vor einem Jahr auf dem 38C3 oder Ende April zum deutschlandweiten Start. Zeit ein Fazit zu ziehen: Ist die ePA jetzt sicher? Wurden nachhaltige Veränderungen durchgeführt, die zu mehr Sicherheit führen? Kann der Umgang mit der IT-Sicherheit «eines der größten IT-Projekte der Bundesrepublik» für zukünftige Digitalprojekte hilfreich sein? Zeit, mit etwas Abstand auf das zu blicken, was war, was ist und was sich abzeichnet nicht nur bei der ePA, sondern auch beim Umgang mit IT-Sicherheit bei ähnlichen Vorhaben in Deutschland. Eine umfassende Analyse der Historie und der Ursachen einer der weitreichendsten Fehlentwicklungen im Bereich der IT-Sicherheit der letzten Jahre, die sich in weit mehr zeigt, als nur in schlechter Prüfung der Anwesenheit von Gesundheitskarten im Gesundheitswesen. Zum letzten Chaos Communication Congress konnten Martin Tschirsich und Bianca Kastl eine Ansammlung größerer und kleiner Sicherheitsprobleme in der elektronischen Patientenakte für alle aufzuzeigen – sei es in der Ausgabe von Identifikationsmitteln, in Systemen in der Telematikinfrastruktur oder in angebundenen Systemen. All diese Probleme kumulierten in einem veränderten und reduzierten Rollout der ePA für alle in den Modellregionen Anfang 2025, bei dem bereits erste Maßnahmen zur Schadensminimierung unternommen wurden. Ende April 2025 wurde die ePA für alle dann auch wirklich für alle deutschlandweit bereitgestellt – allerdings traten am gleichen Tag die scheinbar sicher gelösten Sicherheitslücken im Zugangsmanagement wieder zu Tage und wurden alsbald wieder nur provisorisch abgedichtet. Dieser Talk will etwas zurückblicken auf die Geschichte und die Ursachen dieser Sicherheitsprobleme der ePA für alle. Als «eines der größten IT-Projekte der Bundesrepublik» steht die ePA sinnbildlich für den digitalpolitischen Umgang mit Sicherheitsversprechen und interessensgetriebenen Anforderungen über die Köpfe von Patient*innen oder Bürger*innen hinweg. Dabei geht es nicht nur um technische Probleme und deren Behebungsversuche, sondern auch um die strukturellen Ursachen, die große digitale Vorhaben immer wieder in manchen Bereichen scheitern lassen. Diese tiefergehende Betrachtung kann uns dabei helfen, die Ursachen für schlechte IT-Sicherheit auch bei zukünftigen digitalpolitischen Vorhaben in Deutschland besser zu verstehen. Nicht für die ePA für alle und Anwendungen im Bereich der Telematikinfrastruktur, sondern auch weit darüber hinaus. Tiefergehende Analyse und Nachwirkungen zu 38C3 „Konnte bisher noch nie gehackt werden“: Die elektronische Patientenakte kommt - jetzt für alle! Bianca Kastl https://events.ccc.de/congress/2025/hub/event/detail/schlechte-karten-it-sicherheit-im-jahr-null-der-epa-fur-alle https://cfp.cccv.de/39c3/talk/ZG8SZ9/ Slides https://cfp.cccv.de/39c3/talk/ZG8SZ9/feedback/ false 2025-12-29T19:15:00+01:00 19:15 01:00 One 39c3-ai-agent-ai-spy en Ethics, Society & Politics Talk Agentic AI is the catch-all term for AI-enabled systems that propose to complete more or less complex tasks on their own, without stopping to ask permission or consent. What could go wrong? These systems are being integrated directly into operating systems and applications, like web browsers. This move represents a fundamental paradigm shift, transforming them from relatively neutral resource managers into an active, goal-oriented infrastructure ultimately controlled by the companies that develop these systems, not by users or application developers. Systems like Microsoft's "Recall," which create a comprehensive "photographic memory" of all user activity, are marketed as productivity enhancers, but they function as OS-level surveillance and create significant privacy vulnerabilities. In the case of Recall, we’re talking about a centralized, high-value target for attackers that poses an existential threat to the privacy guarantees of meticulously engineered applications like Signal. This shift also fundamentally undermines personal agency, replacing individual choice and discovery with automated, opaque recommendations that can obscure commercial interests and erode individual autonomy. This talk will review the immediate and serious danger that the rush to shove agents into our devices and digital lives poses to our fundamental right to privacy and our capacity for genuine personal agency. Drawing from Signal's analysis, it moves beyond outlining the problem to also present a "tourniquet" solution: looking at what we need to do *now* to ensure that privacy at the application layer isn’t eliminated, and what the hacker community can do to help. We will outline a path for ensuring developer agency, granular user control, radical transparency, and the role of adversarial research. The talk will provide a critical technical and political economy analysis of the new privacy crisis emerging from OS and application level AI agents, aimed at the 39C3 "Ethics, Society & Politics" audience. 1. Defining the Threat: The OS as a Proactive Participant (5 mins) We will begin by defining "Agentic AI" in two contexts - imbibed into the operating system and deployed via critical gateway applications such as web browsers. Traditionally, the operating systems and browsers are largely neutral enforcers of user agency, managing resources and providing APIs for applications to run reliably. We will argue that this neutrality is close to being eliminated. The new paradigm shifts these applications into a proactive agent that actively observes, records, and anticipates user actions across all applications.The prime example for this analysis will be Microsoft’s "Recall" feature, Google’s Magic Cue, and OpenAI’s Atlas. Politically, we will frame this not as a "feature" but as the implementation of pervasive, non-consensual surveillance and remote-control infrastructure. This "photographic memory" of and demand for non-differentiated access to everything from private Signal messages to financial data to health data creates a catastrophic single point of failure, making a single security breach an existential threat to a user's entire digital life. Ultimately, we hope to illustrate how putting our brains in a jar (with agentic systems) is effectively a prompt injection attack against our own humanity. 2. The Existential Threat to Application-Level Privacy (10 mins) The core of the talk will focus on what this means for privacy-first applications like Signal. We will explain the "blood-brain barrier" analogy: secure apps are meticulously engineered to minimize data and protect communications, relying on the OS to be a stable, neutral foundation on which to build. This new OS trend breaks that barrier. We will demonstrate how OS-level surveillance renders application-level privacy features, including end-to-end encryption, effectively useless. If the OS can screenshot a message before it's encrypted or after it's decrypted, the promise of privacy is broken, regardless of the app's design. We will also discuss the unsustainable "clever hacks" (like Signal using a DRM feature) that developers are forced to implement, underscoring the need for a structural solution. 3. An Actionable Framework for Remediation (20 mins) The final, and most important, part of the talk will move from critique to action. We will present an actionable four-point framework as a "tourniquet" to address these immediate dangers: a. Empower Developers: Demand clear, officially supported APIs for developers to designate individual applications as "sensitive" with the default posture being for such applications being opted-out of access by agentic systems (either OS or application based) (default opt-out) b. Granular User Control: Move beyond all-or-nothing permissions. Users must have explicit, fine-grained control to grant or deny AI access on an app-by-app basis. c. Mandate Radical Transparency: OS vendors and application developers must clearly disclose what data is accessed, how it's used, and how it's protected—in human-readable terms, not buried in legalese. Laws and regulations must play an essential role but we cannot just wait for them to be enforced, or it will be too late. d. Encourage and Protect Adversarial Research: We will conclude by reinforcing the need for a pro-privacy, pro-security architecture by default, looking at the legal frameworks that govern these processes and why they need to be enforced, and finally asking the attendees to continue exposing vulnerabilities in such systems. It was only due to technically-grounded collective outrage that Recall was re-architected by Microsoft and we will need that energy if we are to win this war. Udbhav Tiwari Meredith Whittaker https://events.ccc.de/congress/2025/hub/event/detail/ai-agent-ai-spy https://cfp.cccv.de/39c3/talk/X3KPZN/ https://cfp.cccv.de/39c3/talk/X3KPZN/feedback/ false 2025-12-29T20:30:00+01:00 20:30 01:00 One 39c3-blackbox-palantir de Ethics, Society & Politics Talk Wer nutzt in Deutschland Software von Palantir und wer hat das in naher Zukunft vor? Was sind die rechtlichen Voraussetzungen für den Einsatz solcher Analysewerkzeuge? Und was plant Innenminister Alexander Dobrindt in Sachen Palantir für die Polizeien des Bundes? Software von Palantir analysiert für Polizeien und Militär deren Daten – dafür lizenzieren auch deutsche Polizeibehörden seit Jahren die Analysesoftware Gotham des US-Unternehmens. Die Software verarbeitet strukturierte und unstrukturierte Informationen aus Polizeidatenbanken. Die genauen Funktionsweisen sind für die Öffentlichkeit, Gesetzgeber und Kontrollbehörden jedoch nicht einsehbar. Das US-Unternehmen ist hochumstritten und auch in Deutschland seit einigen Gesetzesinitiativen wieder umkämpft – wegen seiner intransparenten Analysemethoden, seiner Zusammenarbeit mit autoritären Staaten und seiner Nähe zur US-Regierung. Rechtlich ist der Einsatz von Analysetools wie von Palantir in Deutschland ohnehin komplex, denn das Bundesverfassungsgericht hat 2023 deutliche Grenzen für polizeiliche Datenanalysen gezogen. Dennoch haben mehrere Bundesländer für ihre Polizeien Verträge oder streben sie an. Auch auf Bundesebene wird der Einsatz für das Bundeskriminalamt und die Bundespolizei hitzig diskutiert. Wie funktioniert Gotham und welche Gefahren gehen damit einher? Welche Entwicklungen sind im Bund und in den Ländern zu beobachten? Wie geht es weiter? Wir wollen über den Stand der Dinge in Bund und Ländern informieren und auch zeigen, wie wir versuchen, rechtliche Vorgaben durchzusetzen. Denn die GFF und der CCC sind an Verfassungsbeschwerden beteiligt, unter anderem in Hessen, Hamburg und zuletzt in Bayern. https://cfp.cccv.de/media/39c3/submissions/3SNDCP/GS7OQp5WwAAUTyi_M06P8hJ.jpeg Constanze Kurz Franziska Görlitz https://events.ccc.de/congress/2025/hub/event/detail/blackbox-palantir https://cfp.cccv.de/39c3/talk/3SNDCP/ https://cfp.cccv.de/39c3/talk/3SNDCP/feedback/ false 2025-12-29T21:45:00+01:00 21:45 01:00 One 39c3-10-years-of-dieselgate en Security Talk Let's have a (hopefully) final look at Diesel emission cheating. This technical talk summarizes what I learned by reverse-engineering dozens of engine ECU software, how I found and characterized "interesting logic" which, more often than not, ended up being a court-approved "defeat device". What started as a "curious investigation" in 2015 to obtain a ground truth to widespread media reports of "VW being caught for cheating" ended up as a full-blown journey through the then-current state of the Diesel car industry. In this talk, Karsten and Felix will walk through the different implementation of defeat devices, their impact on emissions, and the challenges in documenting seemingly black boxes in court-proven expert reports. 10 years ago, Felix spent a lot of sleepless nights on reverse-engineering the Diesel software that implemented the (by now) well-known "Acoustic Function" defeat device; he presented my findings at the 32c3 and 33c3 in 2015 and 2016, expecting this to be the last time we needed to hear about this. Little did he know about the extent of the Diesel emissions cheating. Since then he has analyzed many more vehicles, learned a bit or two about mechanical engineering problems of cars. Karsten, working as a court-appraised expert, will add his unique view on the challenges in documenting software that was never meant to be understood by the public. This talk will discuss methodologies of independent analysis of highly dynamic systems that many people see as black boxes (but that, of course, are not: they are just machines running software). Felix Domke Karsten Burger https://events.ccc.de/congress/2025/hub/event/detail/10-years-of-dieselgate https://cfp.cccv.de/39c3/talk/7MSRA7/ https://cfp.cccv.de/39c3/talk/7MSRA7/feedback/ false 2025-12-29T23:00:00+01:00 23:00 00:40 One 39c3-rowhammer-in-the-wild-large-scale-insights-from-flippyr-am en Security Talk Last year at 38c3, we gave a talk titled "Ten Years of Rowhammer: A Retrospect (and Path to the Future)." In this talk, we summarized 10 years of Rowhammer research and highlighted gaps in our understanding. For instance, although nearly all DRAM generations from DDR3 to DDR5 are vulnerable to the Rowhammer effect, we still do not know its real-world prevalence. For that reason, we invited everyone at 38c3 last year to participate in our large-scale Rowhammer prevalence study. In this year's talk, we will first provide an update on Rowhammer research and present our results from that study. A lot has happened in Rowhammer research in 2025. We have evidence that DDR5 is as vulnerable to Rowhammer as previous generations. Other research shows that not only can adversaries target rows, but columns can also be addressed and used for bit flips. Browser-based Rowhammer attacks are back on the table with Posthammer and with ECC. fail, we can mount Rowhammer attacks on DDR4 with ECC memory. In our large-scale study, we measure Rowhammer prevalence in a fully automated cross-platform framework, FlippyR.AM, using the available state-of-the-art software-based DRAM and Rowhammer tools. Our framework automatically gathers information about the DRAM and uses 5 tools to reverse-engineer the DRAM addressing functions, and based on the reverse-engineered functions, uses 7 tools to mount Rowhammer. We distributed the framework online and via USB thumb drives to thousands of participants from December 30, 2024, to June 30, 2025. Overall, we collected 1006 datasets from 822 systems with various CPUs, DRAM generations, and vendors. Our study reveals that out of 1006 datasets, 453 (371 of the 822 unique systems) succeeded in the first stage of reverse-engineering the DRAM addressing functions, indicating that successfully and reliably recovering DRAM addressing functions remains a significant open problem. In the second stage, 126 (12.5 % of all datasets) exhibited bit flips in our fully automated Rowhammer attacks. Our results show that fully automated, i.e., weaponizable, Rowhammer attacks work on a lower share of systems than FPGA-based and lab experiments indicated, but at 12.5%, are still a practical vector for threat actors. Furthermore, our results highlight that the two most pressing research challenges around Rowhammer exploitability are more reliable reverse-engineering tools for DRAM addressing functions, as 50 % of datasets without bit flips failed in the DRAM reverse-engineering stage, and reliable Rowhammer attacks across diverse processor microarchitectures, as only 12.5 % of datasets contained bit flips. Addressing each of these challenges could double the number of systems susceptible to Rowhammer and make Rowhammer a more pressing threat in real-world scenarios. This will be a followup talk after our talk "Ten Years of Rowhammer: A Retrospect (and Path to the Future)" at 38C3. In the talk last year we gave an overview of the current state of Rowhammer and highlighted that there are no large-scale prevalence studies. We wanted to change that and asked the audience to participate in our large-scale study on Rowhammer prevalence. We performed the large-scale study on Rowhammer prevalence thanks to many volunteers supporting our study by measuring their systems. In total, we collected 1006 datasets on 822 different systems (some systems were measured multiple times). We show that 126 of them (12.5%) are affected by Rowhammer with our fully-automated setup. This should be seen as a lower bound, since the preconditions required for effective tools failed on ~50% of the systems. Among many other insights, we learned that the fully-automated reverse-engineering of DRAM addressing functions is still an open problem and we assume the actual number of affected systems to be higher as the 12.5% we measured in our study. Now, one year after our talk at the 38C3, we want to give an update on the current state of Rowhammer, since multiple new insights were published in the last year: The first reliable Rowhammer exploit on DDR5, a JavaScript implementation of Rowhammer that works on current DDR4 systems, and an ECC bypass on DDR4, just to name a few. Additionally, we want to present the results of our large-scale study on Rowhammer prevalence which was supported by the audience from last year's talk. https://cfp.cccv.de/media/39c3/submissions/3JXAJJ/rowhammer_lclviuE_NtNU8dT_3FqiKqJ_d2wVV_A2W9tCQ.webp Martin Heckel Florian Adamsky Daniel Gruss https://events.ccc.de/congress/2025/hub/event/detail/rowhammer-in-the-wild-large-scale-insights-from-flippyr-am https://cfp.cccv.de/39c3/talk/3JXAJJ/ Slides https://cfp.cccv.de/39c3/talk/3JXAJJ/feedback/ false 2025-12-30T00:15:00+01:00 00:15 00:40 One 39c3-pruf de Ethics, Society & Politics Talk PRÜF! Prüfung Rettet übrigens Freiheit! Alles wird in Deutschland geprüft. Warum nicht auch mutmaßlich verfassungswidrige Parteien? Hier stelle ich vor, was PRÜF! anders machen will als bisherige Kampagnen. Wir haben eine Forderung: „Alle Parteien, die vom Verfassungsschutz als rechtsextremer Verdachtsfall oder gesichert rechtsextrem eingestuft werden, sollen durch das Bundesverfassungsgericht überprüft werden.“ Wir demonstrieren so lange, bis der Bundesrat die Prüfung formal beantragt hat. PRÜF-Demos. Bald in allen Landeshauptstädten. Am 2. Samstag. Jeden Monat. Warum beim Schutz der Demokratie nicht mal einen Ansatz wählen, der so noch nicht probiert wurde? Nicht auf die anderen gucken, sondern auf uns? Auf das gemeinsame? Auf Spaß? Das nutzen, was wir haben und was wir können? Wir haben das Grundgesetz, dessen Stärken eingesetzt werden müssen. Wir haben uns, Millionen Menschen, die wir uns organisieren können. Wir haben Ideen, wir haben Geld, wir haben Macht, wir haben Wissen. Bisher haben wir nicht einmal ansatzweise unsere Möglichkeiten ausgeschöpft und es wäre absurd, wenn wir das nicht schaffen würden, die Freiheitliche Demokratische Grundordnung zu schützen. Vortrag kann Spuren von Prüfen enthalten. Nico Semsrott https://events.ccc.de/congress/2025/hub/event/detail/pruf https://cfp.cccv.de/39c3/talk/FZDXVY/ https://cfp.cccv.de/39c3/talk/FZDXVY/feedback/ false 2025-12-30T01:00:00+01:00 01:00 01:30 One 39c3-die-groe-datenschutz-datenpannen-und-ds-gvo-show de Entertainment Game show Datenschutz darf auch Spaß machen, und alle können dabei etwas lernen, egal ob Einsteiger oder Profi-Hacker: Bei dem Datenschutz- und Datenpannen-Quiz kämpfen vier Kandidat:innen aus dem Publikum zusammen mit dem Publikum um den Sieg. Nicht nur Wissen rund um IT-Sicherheit und Datenschutz sondern auch eine schnelle Reaktion und das nötige Quäntchen Glück entscheiden über Sieg und Niederlage. Die Unterhaltsame Datenschutz-Quiz-Show mit Bildungsauftrag! Datenschutz wird oftmals als lästige Pflicht wahrgenommen – aber was will und macht Datenschutz, für was ist er sinnvoll und was ist zu beachten? In welche Stolperfallen können auch Nerds hineinfallen? **Die Datenschutz- und DSGVO-Show vermittelt spielerisch Datenschutzgrundlagen,** bietet einen Einblick in die Praxis der Datenschutz-Aufsichtsbehörden und zeigt typische technische wie rechtliche Fehler im Umgang mit personenbezogenen Daten. Aber auch für Datenschutz-Profis und Superhirne sind einige harte Nüsse dabei. Der Moderator arbeitet beim Landesbeauftragten für den Datenschutz und die Informationsfreiheit Baden-Württemberg und berichtet aus der praktischen Arbeit einer Aufsichtsbehörde, nennt rechtliche Grundlagen, gibt Hinweise zu notwendigen technischen Maßnahmen nach Artikel 32 DS-GVO und die oftmals schwierige Risikoabschätzung nach „wir wurden gecybert“-Sicherheitsvorfällen. Im Quiz selbst müssen die Kandidat:innen in ihren Antworten praktische Lösungsvorschläge für häufige technische und rechtliche Probleme vorschlagen, zum Beispiel welche technischen Maßnahmen bei bestimmten Datenpannen nach dem „Stand der Technik“ angebracht sind, ob man als Website-Betreiber denn nun Google Analytics nutzen darf oder wie man sich gegen (rechtswidrige) Datensammler wehrt. Dadurch können Teilnehmer wie Zuschauer die praktische Anwendung der DS-GVO spielerisch lernen. Alvar C.H. Freude https://events.ccc.de/congress/2025/hub/event/detail/die-groe-datenschutz-datenpannen-und-ds-gvo-show https://cfp.cccv.de/39c3/talk/FJWMWQ/ https://cfp.cccv.de/39c3/talk/FJWMWQ/feedback/ false 2025-12-29T09:30:00+01:00 09:30 01:15 Ground 39c3-azubi-tag-einfuhrung de CCC & Community Talk Jedes Jahr zwischen Weihnachten und Neujahr treffen sich tausende Hacker*innen zum Chaos Communication Congress in Hamburg. Der Azubi-Tag ist eine günstige Gelegenheit für Auszubildende, den Congress zu besuchen, den CCC kennenzulernen und viel über IT-Security, Technik und Gesellschaft zu lernen. Wir freuen uns, diesen Tag nun zum dritten Mal anbieten zu können. Weitere Informationen findest du auf [https://events.ccc.de/congress/2025/infos/azubi-tag.html](https://events.ccc.de/congress/2025/infos/azubi-tag.html) https://events.ccc.de/congress/2025/hub/event/detail/azubi-tag-einfuhrung https://cfp.cccv.de/39c3/talk/XFHQBY/ https://cfp.cccv.de/39c3/talk/XFHQBY/feedback/ true 2025-12-29T11:00:00+01:00 11:00 00:40 Ground 39c3-design-for-3d-printing en Hardware Talk 3D-Printers have given us all the unprecedented ability to manufacture mechanical parts with a very low barrier to entry. The only thing between your idea and its physical manifestation is the process of designing the parts. However, this is actually a topic of incredible depth: Design engineering is a whole discipline to itself, built on top of tons and tons of heuristics to produce shapes that are functional, strong, and importantly: well-manufacturable In this talk, I will present the rules for designing well-printable parts and touch on other areas of design considerations so you can learn to create parts that work first try and can be reproduced by others on their 3d-printers easily. Over the years, the 3d-printing community has discovered many tricks and rules that help creating parts that can be printed well and fulfill their purpose as best as possible. I started collecting these rules and wrote an article guide to make this knowledge more accessible. I want to present the most important principles and the mindset that is needed to achieve perfected design. This is not about how to use a CAD program to design a part — but rather about the thought process of the design engineer while drawing up a part. A though process that consists of compromises between many objectives, of heuristic rules, and many neat little tricks. The article that this talk is based on can be found on my blog: https://blog.rahix.de/design-for-3d-printing/ rahix https://events.ccc.de/congress/2025/hub/event/detail/design-for-3d-printing https://cfp.cccv.de/39c3/talk/9KVMHY/ https://cfp.cccv.de/39c3/talk/9KVMHY/feedback/ false 2025-12-29T11:55:00+01:00 11:55 00:40 Ground 39c3-a-media-almost-archaeology-on-data-that-is-too-dirty-for-ai en Art & Beauty Talk when datasets are scaled up to the volume of (partial) internet, together with the idea that scale will average out the noise, large dataset builders came up with a human-not-in-the-loop, cheaper-than-cheap-labor method to clean the datasets: heuristic filtering. Heuristics in this context are basically a set of rules came up by the engineers with their imagination and estimation to work best for their perspective of “cleaning”. Most datasets use heuristics adopted from existing ones, then add some extra filtering rules for specific characteristics of the datasets. I would like to invite you to have a taste together of these silent, anonymous yet upheld estimations and not-guaranteed rationalities in current sociotechnical artifacts, and on for whom these estimations are good-enough, as it will soon be part our technological infrastructures. In 1980s, non-white women’s body size data was categorized as dirty data when establishing the first women's sizing system in US. Now in the age of GPT, what is considered as dirty data and how are they removed from massive training materials? Datasets nowadays for training large models have been expanded to the volume of (partial) internet, with the idea of “scale averages out noise”, these datasets were scaled up by scrabbling whatever available data on the internet for free then “cleaned” with a human-not-in-the-loop, cheaper-than-cheap-labor method: heuristic filtering. Heuristics in this context are basically a set of rules came up by the engineers with their imagination and estimation that are “good enough” to remove “dirty data” of their perspective, not guaranteed to be optimal, perfect, or rational. The talk will show some intriguing patterns of “dirty data” from 23 extraction-based datasets, like how NSFW gradually equals to NSFTM (not safe for training model), and reflect on these silent, anonymous yet upheld estimations and not-guaranteed rationalities in current sociotechnical artifacts, and ask for whom these estimations are good-enough, as it will soon be part our technological infrastructures. https://cfp.cccv.de/media/39c3/submissions/SSWHEP/reference_6h837ss_ACZEAm3.webp jiawen uffline https://events.ccc.de/congress/2025/hub/event/detail/a-media-almost-archaeology-on-data-that-is-too-dirty-for-ai https://cfp.cccv.de/39c3/talk/SSWHEP/ https://cfp.cccv.de/39c3/talk/SSWHEP/feedback/ false 2025-12-29T12:50:00+01:00 12:50 00:40 Ground 39c3-teckids-eine-verstehbare-digitale-welt de CCC & Community Talk Die Teckids-Gemeinschaft bringt Kinder, Jugendliche und Erwachsene zusammen, um gemeinsam aktiv für eine verstehbare (digitale) Welt zu sein. Bei Teckids geht es nicht "nur" um Technikbasteln und Programmieren mit Kindern, sondern darum, mit anderen, für andere, bei Events und gesellschaftlich aktiv zu werden. In letzter Zeit haben wir viele Projekte dafür unternommen. Unter anderem haben wir den neuen Themen-Slot "Jung und überwacht" bei den BigBrotherAwards 2025 gestaltet und bereiten Jugendthemen für das nächste Jahr vor. Zum zweiten Mal laden wir beim 39c3 Kinder beim Fairydust-Türöffner-Tag "hinter die Kulissen" der Chaos-Teams ein. Unser Slogan mit dem etwas merkwürdigen Wort "Verstehbarkeit" steht dafür, dass alle nicht nur die Fähigkeiten, sondern auch das Recht behalten sollen, mit ihrer Technik zu machen, was sie wollen, und alles zu hinterfragen und zu verstehen. Dafür wollen wir noch mehr junge Menschen und auch Erwachsene erreichen. Keno Darius Auding https://events.ccc.de/congress/2025/hub/event/detail/teckids-eine-verstehbare-digitale-welt https://cfp.cccv.de/39c3/talk/9YBCSL/ Slides für den Vortrag https://cfp.cccv.de/39c3/talk/9YBCSL/feedback/ false 2025-12-29T13:50:00+01:00 13:50 00:40 Ground 39c3-shit-for-future-turning-human-shit-into-a-climate-solution en Science Talk Humanity has already crossed the point where simply reducing emissions will no longer be enough to keep global warming below 2°C. According to the IPCC (AR6, WGIII), it is now essential to actively remove greenhouse gases from the atmosphere in order to meet global climate targets, maintain net-zero (or even net-negative emissions), and address the burden of historical emissions. At the same time, degraded soils and the climate crisis are a threat to global food security. Two years ago, I presented an overview of different methods available for carbon dioxide removal. Today, I want to show you an example of how CO₂ can be removed from the atmosphere while simultaneously improving the lives of local communities: Human shit. Human shit is a high abundant biomass, contains critical nutrients for global food security, and causes serious health and environmental issues from poor or non-existent treatment outside industrial countries. Converting shit into biochar presents a powerful solution: the process eliminates contaminants, stabilizes and locks away carbon, and can be used to improve agricultural soils. The challenge is that most nutrients in this biochar are not accessible to plants. To overcome this, I mixed human and chicken shit and produced a “Superchar” that releases far more nutrients. It’s not magic, it’s just some chemistry and putting aside your prejudices and disgust. I’ll show you how I did some shit experiments in Hamburg and Guatemala and how you can do it too. Today’s science mostly follows worn-out pathways and lack big discoveries and innovations. Scientists often don’t want to take a risk because the competition for a permanent position in academia is so high, which pressures them into conservative research topics supported by their supervisors. Even when science provides helpful solutions for urgent problems, the knowledge mostly ends up in libraries, written in papers that nobody understands. I want to show that it is worthwhile to follow research ideas that are unconventional, upset your boss af and explore topics that are unpopular like working with shit. I hope that sharing stories of how a funny idea turned into a solution encourage others to start making impact in their environment. https://cfp.cccv.de/media/39c3/submissions/AFTZCD/Summary-min_vFYP5QT_UgSmUXk_Uv6HF72.webp Elena https://events.ccc.de/congress/2025/hub/event/detail/shit-for-future-turning-human-shit-into-a-climate-solution https://cfp.cccv.de/39c3/talk/AFTZCD/ https://cfp.cccv.de/39c3/talk/AFTZCD/feedback/ false 2025-12-29T14:45:00+01:00 14:45 01:00 Ground 39c3-programmierte-kriegsverbrechen-uber-ki-systeme-im-kriegseinsatz-in-gaza-und-warum-it-fachleute-sich-dazu-auern-mussen de Ethics, Society & Politics Talk Die automatisierten Zielsysteme des israelischen Militärs zeigen gut, wie KI-baserte Kriegsautomatisierung aktuell aussieht, was daran falsch läuft und warum wir Techies uns einmischen müssen Das Thema „KI in der Militärtechnik“ und die Beziehung zwischen Mensch und Maschine ist seit Jahrzehnten ein Thema in der Friedensbewegung, der Konfliktforschung, der Philosophie, den Sozialwissenschaften und den kritischen Data & Algorithm Studies. Doch in den letzten Jahren wurden Waffensysteme mit KI-Komponenten entwickelt und auch praktisch in bewaffneten Konflikten eingesetzt. Dabei reicht die Anwendung von Drohnensteuerung über optische Zielerfassung bis hin zur logistischen Zielauswahl. Am Beispiel KI-gestützter Zielwahlsysteme, die vom israelischen Militär seit Mai 2021 und insbesondere jetzt im Genozid in Gaza eingesetzt werden, können die aktuellen technischen Entwicklungen aufgezeigt und analysiert werden. Im Fokus dieses Talks stehen vier KI-unterstützte Systeme: Das System Gospel zur militärischen Bewertung von Gebäuden, das System Lavender zur militärischen Bewertung von Personen, das System Where's Daddy? zur Zeitplanung von Angriffen und ein experimentelles System auf Basis großer Sprachmodelle zur Erkennung militärisch relevanter Nachrichten in palästinensischen Kommunikationsdaten. Auf Basis der Aussagen von Whistleblower:innen des israelischen Militärs und Angestellten beteiligter Unternehmen wie Amazon, Google oder Microsoft sowie internen Dokumenten, die durch investigative Recherchen von mehreren internationalen Teams von Journalist:innen veröffentlicht wurden, können die Systeme und Designentscheidungen technisch detailliert beschrieben, kritisch analysiert sowie die militärischen und gesellschaftlichen Implikationen herausgearbeitet und diskutiert werden. Dabei entstehen auch Fragen bezüglich Verantwortungsverlagerung durch KI, Umgehung und Bruch des humanitären Völkerrechts sowie die grundsätzliche Rolle von automatisierter Kriegsführung. Am Schluss geht der Vortrag noch auf die Verantwortung von IT-Fachleuten ein, die ja das Wissen und Verständnis dieser Systeme mitbringen und daher überhaupt erst problematisieren können, wenn Systeme erweiterte oder gänzlich andere Funktionen erfüllen, als öffentlich und politisch oft kommuniziert und diskutiert wird. Überlegungen zu Handlungsoptionen und Auswegen leiten zuletzt die Diskussion ein. https://cfp.cccv.de/media/39c3/submissions/ZZZHYE/ki-im-krieg-lavender-CC_BY-SA_Palestini_nkeiZnl.webp Rainer Rehak https://events.ccc.de/congress/2025/hub/event/detail/programmierte-kriegsverbrechen-uber-ki-systeme-im-kriegseinsatz-in-gaza-und-warum-it-fachleute-sich-dazu-auern-mussen https://cfp.cccv.de/39c3/talk/ZZZHYE/ https://cfp.cccv.de/39c3/talk/ZZZHYE/feedback/ false 2025-12-29T16:00:00+01:00 16:00 01:00 Ground 39c3-there-is-no-way-we-ended-up-getting-arrested-for-this-malta-edition en Security Talk 3 years ago, 3 Maltese students were arrested and charged with computer misuse after disclosing a vulnerability to a local company that developed a mobile app for students. Through persistent media pressure, the students managed to obtain a presidential pardon to drop the case and funding for their lawyers. However, through this journey, there were mentions of punishment for retaliating through media disclosure. The story has not concluded, and there will be no amendments to the Maltese computer misuse law for the foreseeable future. The talk goes through the full journey, 1. The talk describes in more detail how the arrests were carried out on November 12th, 2022 including the confiscation of all computer equipment, the time spent in a cell and the interrogation before being released. 2. How the decision was made to go to the media 5 months later, the consequences of that and why it was beneficial. 3. The later fallout including the university disassociating itself from the students + even disallowing one of the students to tutor at the university 4. How this led to a pause in Malta's participation in the European Cyber Security Challenge with one specific meeting involving the national IT agency and the 3 students. 5. mentions of a grant of a pardon after the prime minister visited the office of a student 6. The start of the initial court sessions and the outcomes from that. 7. A super interesting meeting where the justice minister told the students that even though they'll be given a pardon -- if this happens again they will be arrested again. 8. What it meant to get a pardon and how that technically still hasn't ended our situation in court yet. mixy1 Luke Bjorn Scerri girogio https://events.ccc.de/congress/2025/hub/event/detail/there-is-no-way-we-ended-up-getting-arrested-for-this-malta-edition https://cfp.cccv.de/39c3/talk/MESA3X/ Slides https://cfp.cccv.de/39c3/talk/MESA3X/feedback/ false 2025-12-29T17:15:00+01:00 17:15 01:00 Ground 39c3-set-top-box-hacking-freeing-the-freebox en Security Talk The French ISP 'Free' was the first to introduce a set-top box in France in 2002, named the Freebox. Four years later, the fifth version of the Freebox was released and distributed to customers. It comprises two devices: a router, and a PVR called the Freebox HD, both running Linux. The Freebox HD had innovative features at the time, such as live television control and HD capabilities. Such a device has a lot of potential for running homebrew, so I decided to hack it. I present how I got arbitrary code execution on the Freebox HD and then root privileges, using a chain of two 0-day exploits, one of which is in the Linux kernel. I then analyze the device, run homebrew software, and explain the structure of the ISP's private network that I uncovered while exploring the device. The Freebox HD is a set-top box with media player capabilities designed and built by the French ISP 'Free' in 2006, and distributed to customers since (including me). It is still in use and will be maintained until the end of 2025. When I got it, I wanted to run homebrew software on it, so I decided to reverse engineer it. The initial goal was to get arbitrary code execution. The Freebox HD being largely undocumented, this talk shows the full process of reverse engineering it from scratch: * Initial visual inspection * Disassembly and inspection of the insides * Attack surface analysis and choice of the target * Search and exploitation of a vulnerability in PrBoom (a Doom source port running on the Freebox HD) * Analysis of the Linux system running on the Freebox HD * Search and exploitation of a Linux kernel exploit to escape the sandbox and gain root privileges * Decryption and dump of the firmware * Analysis of the Linux system and the programs of the Freebox HD * Playing with the remote control capabilities * Reverse engineering of the private networks of the ISP The two exploits used to gain full root access were both discovered for this specific hack, which makes them 0-day exploits. The analysis leads to some interesting discoveries about the device itself, but also the ISP, how their technical support works and accesses the devices remotely, and much more! https://cfp.cccv.de/media/39c3/submissions/7GSZAD/freebox_hd_hacked_Ff7V3CM_Z7w9CUz_hwimNb0.webp Frédéric Hoguin https://events.ccc.de/congress/2025/hub/event/detail/set-top-box-hacking-freeing-the-freebox https://cfp.cccv.de/39c3/talk/7GSZAD/ Slides https://cfp.cccv.de/39c3/talk/7GSZAD/feedback/ false 2025-12-29T19:15:00+01:00 19:15 00:40 Ground 39c3-build-a-fake-phone-find-real-bugs-qualcomm-gpu-emulation-and-fuzzing-with-libafl-qemu en Security Talk Mobile phones are central to everyday life: we communicate, entertain ourselves, and keep vast swaths of our digital lives on them. That ubiquity makes high-risk groups such as journalists, activists, and dissidents prime targets for sophisticated spyware that exploits device vulnerabilities. On Android devices, GPU drivers have repeatedly served as the final escalation vector into the kernel. To study and mitigate that risk, we undertook a research project to virtualize the Qualcomm Android kernel and the KGSL graphics driver from scratch in QEMU. This new environment enables deep debugging, efficient coverage collection, and large-scale fuzzing across server farms, instead of relying on a handful of preproduction devices. This talk will highlight the technical aspects of our research, starting with the steps required to boot the Qualcomm mobile kernel in QEMU, all the way up to the partial emulation of the GPU. Then, we will present how we moved from our emulation prototype to a full-fledged fuzzer based on LibAFL QEMU. Mobile phone manufacturers ship competitive hardware supported by increasingly complex software stacks, ranging from firmware and bootloaders to kernel modules, hypervisors, and other TrustZone environments. In an effort to keep their products secure, these companies rely on state-of-the-art testing techniques such as fuzzing. They commonly perform their fuzzing campaigns on-device to find vulnerabilities. Unfortunately, this approach is expensive to scale and does not always provide fine-grained control over the target. To address these issues, we approached the problem through the prism of emulation, by partially reimplementing the hardware as a normal software to run on a computer. That way, we could scale fuzzing instances, and gain full control over the emulated target. The presentation will outline how we made the full emulation of Qualcomm’s Android ecosystem possible by tweaking the complex build system of the Android image and implementing a custom board (including more than 10 custom devices) in QEMU. We will review the steps required and the technical challenges encountered along the way. After providing a quick recap and the latest updates on LibAFL QEMU (presented at 37C3) by one of the LibAFL maintainers, we will delve into the gory details of how we partially emulated the latest version of Adreno—the GPU designed by Qualcomm—and built a fuzzer for its Android kernel driver. In particular, we will show how LibAFL QEMU was integrated into our custom board and the few improvements we made to the kernel to get better coverage with KCOV. Finally, we will demonstrate how our approach enabled us to find a new critical vulnerability in the GPU kernel driver. Romain Malmain https://events.ccc.de/congress/2025/hub/event/detail/build-a-fake-phone-find-real-bugs-qualcomm-gpu-emulation-and-fuzzing-with-libafl-qemu Resources repository https://cfp.cccv.de/39c3/talk/LUK8DG/ Slides https://cfp.cccv.de/39c3/talk/LUK8DG/feedback/ false 2025-12-29T20:30:00+01:00 20:30 01:00 Ground 39c3-aber-hier-leben-nein-danke-oder-doch-wie-wir-der-autoritaren-zuspitzung-begegnen-konnen de Ethics, Society & Politics Talk Im Osten stehen nächstes Jahr schon wieder Wahlen an und schon wieder sieht alles danach aus, als ob die AfD eine Regierungsbeteiligung bekommen könnte. Ganz konkret: In Sachsen-Anhalt und Mecklenburg-Vorpommern. Nicht nur diese "rosigen" Aussichten, sondern auch aktuelle Bevölkerungsprognosen werfen gar kein günstiges Licht auf die Regionen. Linke Akteur:innen vor Ort kämpfen täglich dagegen an und sie brauchen unsere Solidarität. Wir müssen dem etwas entgegensetzen. Egal ob als Hacker:innen auf dem Congress oder Westdeutsche in (noch) Grünen Gemeinden. Wo kommt das alles her? Wer macht aktuell etwas dagegen und wie können wir dem rechten Sog begegnen? Mit dem „Super-Ost-Wahljahr“ 2024 (Landtagswahlen in Sachsen, Thüringen und Brandenburg) wurden bereits alle möglichen AfD-Regierungs-Horrorszenarien in Ostdeutschland in den Medien diskutiert und ausgemalt. Nächstes Jahr stehen jedoch noch die Landtagswahlen in Sachsen-Anhalt und Mecklenburg-Vorpommern an. Und die Prognosen sehen auch dort übel aus. Wären morgen Wahlen, würde die AfD in Sachsen-Anhalt 39% der Stimmen und in Mecklenburg-Vorpommern 38% bekommen. Um dem etwas entgegenzusetzen müssten wüste Bündnisse aus CDU, Die Linke, SPD und BSW entstehen. Kurzum: LSA und MV sind verloren! Zusätzlich schrumpfen beide Bundesländer und altern gleichzeitig. In Sachsen-Anhalt gibt es keinen einzigen „wachsenden“ Ort. Weniger Kinder, immer mehr ältere Menschen, Fachkräftemangel und ein „Männerüberschuss“ – wer will da schon noch Leben und dem rechten Sog die Stirn bieten? Emanzipatorische Akteur:innen verlassen das Land, denn sie werden angegriffen und kriminalisiert. Also: Mauer drum und sich selbst überlassen? Ganz nach dem alten Tocotronic Song „Aber hier Leben? Nein danke!“ Wir wollen den Osten aber nicht aufgeben, deshalb beleuchten wir in unserem Talk, wie wir mit einer gemeinsamen Kraftanstrengung die Mauer vermeiden können – denn es gibt sie (noch): Die Gegenstimmen und Linken Aktiven die in beiden Bundesländern täglich die Fähnchen hochhalten. Ob die „Zora“ in Halberstadt, das „AZ Kim Hubert“ in Salzwedel oder das „Zentrum für Randale und Melancholie“ in Schwerin: Sie organisieren Austauschräume, alternative Konzerte und Orte, die für alle Menschen offen sind. Sie brauchen unseren Support und wir zeigen euch Möglichkeiten wie dieser aussehen könnte. Außerdem wollen wir ins Gespräch kommen. Was hat eigentlich „der Westen“ mit all dem zu tun? Warum können wir es uns nicht länger leisten unpolitisch oder inaktiv zu sein? Wie kann die Chaos-Bubble sich in die ostdeutschen Herzen hacken? Und was können wir alle tun, um gemeinsam zu preppen und uns den Herausforderungen zu stellen? https://cfp.cccv.de/media/39c3/submissions/HNUX3N/Poly_2_8CTTGob_Le5npam.webp Jaša Hiergeblieben, Polylux Lisa Zugezogen https://events.ccc.de/congress/2025/hub/event/detail/aber-hier-leben-nein-danke-oder-doch-wie-wir-der-autoritaren-zuspitzung-begegnen-konnen https://cfp.cccv.de/39c3/talk/HNUX3N/ https://cfp.cccv.de/39c3/talk/HNUX3N/feedback/ false 2025-12-29T21:45:00+01:00 21:45 01:00 Ground 39c3-the-heartbreak-machine-nazis-in-the-echo-chamber de Ethics, Society & Politics Talk WhiteDate ist eine Plattform weißer Suprematist:innen, die sich an Rassist:innen und Antisemit:innen richtet – und auf veralteter Infrastruktur basiert. Was die 8000 Mitglieder nicht wussten: Einige der Nazis flirteten dieses Jahr mit realistisch wirkenden Chatbots - und verliebten sich sogar in sie. Mit einer Kombination aus automatisierter Konversationsanalyse, Web-Scraping und klassischen OSINT-Methoden verfolgten wir öffentliche Spuren und identifizierten die Personen hinter der Seite. Dieser Vortrag zeigt, wie KI-Personas und investigatives Denken extremistische Netzwerke aufdecken und wie Algorithmen gegen Extremismus eingesetzt werden können. Monatelang tauchte Martha in die verborgene Welt von WhiteDate, WhiteChild und WhiteDeal ein, drei Plattformen, die von einer Rechtsextremistin aus Deutschland betrieben werden. Sie glaubt an die Verschwörung einer weißen Vorherrschaft und einer „rassisch reinen“ weißen Gemeinschaft. Was als Neugier begann, entwickelte sich schnell zu einem Experiment über menschliches Verhalten, Technologie und Absurdität. Martha infiltrierte das Portal mit „realistischen“ KI-Chatbots. Die Bots waren so überzeugend, dass sie die Überprüfungen umgingen und sogar als „weiß“ verifiziert worden. Durch die Gespräche und Recherche von digitalen Spuren dieser Gemeinschaft, die sich in Sicherheit wähnte, konnte sie Nutzer identifizieren. Gemeinsam mit Reporter:innen der „Die Zeit“ konnten wir die Person hinter der Plattform enttarnen und ihre Radikalisierung von einer erfolgreichen Pianistin zu einer Szene-Unternehmerin nachzeichnen. Um ihr Dating-Portal hat sie ein Netzwerk von Websites aufgebaut, dass seinen Nutzern Liebe, Treue und Tradition vermarktet. WhiteDate verspricht romantische Beziehungen, WhiteChild propagiert Familien- und Abstammungsideale und WhiteDeal ermöglicht berufliches Networking und „gegenseitige Unterstützung“ unter einem rassistischen Weltbild. Gemeinsam zeigen sie, wie Ideologie und Einsamkeit auf bizarre Weise miteinander verwoben sein können. Nach monatelanger Beobachtung, klassischer OSINT-Recherche, automatisierter Gesprächsanalyse und Web-Scraping haben wir herausgefunden, wer hinter diesen Plattformen steckt und wie ihre Infrastruktur funktioniert. Dabei deckten wir die Widersprüche und Absurditäten extremistischer Gemeinschaften auf, verdeutlichten ihre Anfälligkeit für technologische Eingriffe und brachten sogar den einen oder anderen Nazi zum Weinen. Dieser Vortrag erzählt von Beobachtung, Schabernack und Einblicken in die digitale Welt extremistischer Gruppen. Er zeigt, wie Algorithmen, KI-Personas und investigatives Denken Hass entlarven, seine Narrative hinterfragen und seine Echokammern aufbrechen können. Wir zeigen, wie Technologie im Kampf gegen Extremismus eingesetzt werden kann. Martha Root Eva Hoffmann Christian Fuchs https://events.ccc.de/congress/2025/hub/event/detail/the-heartbreak-machine-nazis-in-the-echo-chamber https://cfp.cccv.de/39c3/talk/ENKEKW/ https://cfp.cccv.de/39c3/talk/ENKEKW/feedback/ false 2025-12-29T23:00:00+01:00 23:00 01:00 Ground 39c3-peep-show-fur-die-polizei-staatliche-uberwachung-von-queers-in-hamburger-toiletten-bis-1980 de Ethics, Society & Politics Talk Oder: Wie die Hamburger Polizei queere Menschen auf öffentlichen Toiletten observierte, und wie ein anonymes Kollektiv im Juli 1980 dieses Überwachungsystem wortwörtlich mit dem Hammer zerschlagen hat. Ein analoger Überwachungskrimi mit sauberen Städten, lichtscheuen Elementen, queerem Aktivismus, und kollektiver Selbstorganisation; und mit einer Anleitung wie man Beamten Anfang der 80er das Handwerk legen konnte. In den 1970er Jahren nutzt die Hamburger Polizei auf zehn öffentlichen Herrentoiletten in der Wand eingelassene Spionspiegel, um zu beobachten welche Männer am Pissoir ihrer Meinung nach etwas zu lange nebeneinander stehen. In einem Überwachungszeitraum von gut 18 Jahren sprechen Hamburger Beamte mit Berufung auf ‚Jugendschutz‘ und ‚Sauberkeit‘ hunderte Hausverbote an öffentlichen Toiletten aus, nehmen Personalien auf und legen dabei illegalerweise ‚Rosa Listen‘ genannte Homosexuellenregister an. Die unfreiwillige Peep-Show endet im Sommer 1980, als die Polizei völlig indiskret die Teilnehmenden der ersten lesbisch-trans-schwulen Demonstration in Hamburg fotografiert um nach Selbstaussage „die Karteien aufzufrischen“. Ein anonymes Kollektiv zerschlägt die Überwachungsspiegel und bringt die illegale Polizeipraxis ans Licht der Öffentlichkeit. Mit zwei Fragen tauchen wir in diesem Vortrag in die Aborte der Geschichte: Wie ist das polizeiliche Toilettenüberwachungssystem in Hamburg entstanden? Welche technischen und sozialen Lücken nutzten die Aktivist:innen für den Exploit dieses Systems? Und was hat das eigentlich mit heute zu tun? https://cfp.cccv.de/media/39c3/submissions/QPKEKK/KB_AK_1980_181_061_ausschnitt_16-9_MVtN_nDZUQvK.webp Simon Schultz https://events.ccc.de/congress/2025/hub/event/detail/peep-show-fur-die-polizei-staatliche-uberwachung-von-queers-in-hamburger-toiletten-bis-1980 https://cfp.cccv.de/39c3/talk/QPKEKK/ https://cfp.cccv.de/39c3/talk/QPKEKK/feedback/ false 2025-12-30T00:15:00+01:00 00:15 00:40 Ground 39c3-verschlusselung-brechen-durch-physischen-zugriff-smartphone-beschlagnahme-durch-polizei de Ethics, Society & Politics Talk Eine zwar profane Methode der Überwachung, die Polizeibehörden in Deutschland jedoch hunderttausendfach anwenden, ist das Auslesen von Daten beschlagnahmter Smartphones und Computer. Dazu nutzt die Polizei Sicherheitslücken der Geräte mithilfe forensischer Software von Herstellern wie Cellebrite oder Magnet aus. Die Verfassungsmäßigkeit der Rechtsgrundlagen ist zweifelhaft. Im Vortrag werden anhand aktueller Fälle technische und juristische Hintergründe erörtert. Staatstrojaner, Chat-Kontrolle, Wanzen. Die Mittel staatlicher Überwachung sind vielfältig und teilweise technisch sehr komplex. Dabei ist es leicht, den Überblick zu verlieren. Ein relativ profanes Mittel, das Polizeibehörden in Deutschland hunderttausendfach anwenden, ist die Beschlagnahme von Smartphones und Laptops sowie das Auslesen ihrer Daten. Genaue Statistiken gibt es nicht. Es dürften jedoch mehr Fälle sein als bei der einfachen Telekommunikationsüberwachung. Allein in Sachsen-Anhalt waren es innerhalb von fünf Jahren 13.000 Smartphones. Auch bei leichten Straftaten und Ordnungswidrigkeiten beschlagnahmt die Polizei regelmäßig Datenträger - insbesondere Smartphones und Laptops - etwa beim Verdacht einer Beleidigung oder bei der Handynutzung im Straßenverkehr. Oft werden auch Hausdurchsuchungen durchgeführt und dabei alle technischen Geräte beschlagnahmt und durchsucht. Die Verfassungsmäßigkeit dieser polizeilichen Praxis ist sehr zweifelhaft. Das Bundesinnenministerium plante in der letzten Legislatur sogar, die Kompetenzen der Polizei auszuweiten wodurch auch heimliche Hausdurchsuchungen möglich werden sollten. Damit könnte die Polizei heimlich Staatrojaner installieren oder sog. Evil-Maid-Angriffe vorbereiten. Die Strafverfolgungsbehörden stützen sich auf die Beschlagnahmevorschriften der §§ 94 ff. Strafprozessordnung, die seit 1877 im Wesentlichen unverändert geblieben sind und in ihrem Wortlaut weder die Möglichkeit eines Datenzugriffs noch die Modalitäten und Grenzen einer Datenauswertung regeln. Auch wird die Maßnahme nicht auf Straftaten einer gewissen Schwere begrenzt und es fehlen Vorgaben zum Schutz besonders sensibler Daten, die etwa in den Kernbereich der persönlichen Lebensführung fallen. Im Rahmen einer Durchsuchung ermöglicht es der §§ 110 Strafprozessordnung eine vorläufige Sicherung und Durchsicht der Speichermedien. Auch diese Vorschrift reicht nicht aus, um Grundrechte angemessen zu schützen, da mit der kompletten Ausforschung des gesamten Datenbestandes ein gravierender Grundrechtseingriff in die Privatsphäre der Betroffenen verbunden ist und gesetzlich keine angemessenen Grenzen gesetzt werden. Gerade auf Smartphones befinden sich oft höchstpersönliche Daten wie Chats mit der Familie oder dem*der Partner*in, Fotos, Kontakte, Standortdaten und Dating-Apps. Darüber hinaus sind die Geräte regelmäßig mit Cloud-Diensten und anderen Datenträgern verbunden. Auf all diese Daten können Polizeibehörden dann zugreifen. Möglich wird das durch Software von Firmen wie Cellebrite, MSAB oder Magnet. Diese nutzen Sicherheitslücken aus, um die Verschlüsselung von Smartphones zu knacken. Wie auch bei Sicherheitslücken für Staatstrojaner sind die Sicherheitslücken, die diese Firmen ausnutzen, den Herstellern nicht bekannt. Damit unterstützen deutsche Behörden ein System, dass die Geräte aller unsicher macht. Auch die Bitlocker-Verschlüsselung von Windows-Computern lässt sich oft umgehen. Dies ermöglicht den Strafverfolgungsbehörden den freien und unbeschränkten Zugang zu allen persönlichen Daten, ohne angemessene gesetzliche oder gerichtliche Kontrolle und Überprüfung. Auch für die betroffenen Personen wird nicht erkennbar, in welchem Ausmaß Daten durchsucht und ausgewertet wurden. Im Vortrag wird der aktuelle Stand und die Probleme von Verschlüsselung von Windows und Linux Computern sowie Android und iOS Smartphones erläutert. Am Beispiel des Journalisten Hendrik Torners, dessen Smartphone beschlagnahmt wurde, nachdem er eine polizeiliche Maßnahme nach einer Klimademonstration beobachtet hatte und nun im Rahmen einer Verfassungsbeschwerde dagegen vorgeht, sowie weiterer öffentlich diskutierter Fälle wie [#Pimmelgate](https://events.ccc.de/congress/2025/hub/tag/Pimmelgate) besprechen die Vortragenden die technischen und juristischen Hintergründe. Davy Wang Viktor Schlüter https://events.ccc.de/congress/2025/hub/event/detail/verschlusselung-brechen-durch-physischen-zugriff-smartphone-beschlagnahme-durch-polizei https://cfp.cccv.de/39c3/talk/MFKMWA/ Wang, Schlüter - Verschlüsselung brechen durch physischen Zugriff - Smartphone Beschlagnahme durch Polizei https://cfp.cccv.de/39c3/talk/MFKMWA/feedback/ false 2025-12-29T11:00:00+01:00 11:00 02:00 Zero 39c3-lightning-talks-tag-3 de CCC & Community Talk Lightning Talks - Tag 3 - **Lightning Talks Introduction** - **"Oma, erzähl mir von der Zukunft" oder: Wie wir weiter interessante Sachen machen, ohne den Planeten zu ruinieren 🌱** — *EstherD* - **Don't abuse the ecosystem: against overloading "ecosystem'** — *michele* - **The Climatepoetry.org video tool** — *Magnus Ahltorp* - **Neo-Kolonialismus & Katzenbilder - Installation zur Lieferkette von GenAI** — *Rike* - **Build social inventories with StashSphere** — *Maximilian Güntner* - **Invitation to the Fermentation Camp "Kvas 2026"** — *algoldor* - **Stretching nginx to its limits: a music player in the config file** — *Eloy* - **2D Graphics Creation with Graphite - How to Build a Hackable Graphics Editor** — *Dennis Kobert* - **The Modulator: a Custom Controller for Live Music Performance** — *Jakob Kilian* - **Find hot electronic devices for cheap using Lock-In Thermography** — *Clemens Grünewald* - **Those Who Control** — *Andreas Haupt* - **SearchWing - Search&Rescue Drones** — *searchwing team* - **Reducing E-Waste With The Reverse Engineering Toolkit** — *Raaf* - **Genetic engineering with CRISPR/Cas9: how far are we today from biopunk?** — *Dmytro Danylchuk* - **Discovering the Orphan Source Village** — *Martin Hamilton* - **kicoil - generate planar coils in any shape for PCBs and ICs** — *jaseg* - **Trade Offer: Pentest Data for CTF Points** — *Sebastian* - **Soziologische Gabentheorie - Grundlage für die Bewertung von Social Media?** — *sozialwelten* - **Hacking ID3 MP3 Metadata** — *Danilo Erazo* - **ICANN HAZ .MEOW? How we're (trying to) make a TLD out of sheer audacity** — *dotMeow (Aris, Ela, LJ, Wordloc)* - **Shitty Robots** — *Neo* - **UNIX v4** — *aap* - **WissKomm Wiki - Bibliothek für Videos und Podcasts** — *TimBorgNetzWerk* - **Lightning** — *Vi* Bonnie keldo Andi Bräu https://events.ccc.de/congress/2025/hub/event/detail/lightning-talks-tag-3 https://cfp.cccv.de/39c3/talk/JQUCQ7/ https://cfp.cccv.de/39c3/talk/JQUCQ7/feedback/ false 2025-12-29T13:50:00+01:00 13:50 00:40 Zero 39c3-watch-your-kids-inside-a-children-s-smartwatch en Security Talk Join us as we hack at a popular children's smartwatch and expose the secrets of every fifth child in Norway, their parents, and millions more. Smartwatches for children have entered the mainstream: Advertised on the subway and sold by your cell provider, manufacturers are charging premium prices comparable to an entry-level Apple watch. In exchange, parents are promised peace of mind: A safe, gentle introduction into the world of technology — and a way to call, text, and locate their child at any time. But how much are the vendor's promises of safety, privacy, GDPR compliance, apps made in Europe and cloud servers in Germany actually worth? We take you along the process of hacking one of the most popular children's watches out there, from gaining initial access to running our own code on the watch. Along the way, we find critical security issues at every turn. Our PoC attacks allow us to read and write messages, virtually abduct arbitrary children, and take control over any given watch. Finally, we'll also talk about disclosure, funny ideas of what passes as a security fix, and how we can use what we found to build something better. https://cfp.cccv.de/media/39c3/submissions/AHCWCJ/poster-painting_A8w0syT_dmi6hgS_ihKyh7c_Q2U0yAe.webp Nils Rollshausen https://events.ccc.de/congress/2025/hub/event/detail/watch-your-kids-inside-a-children-s-smartwatch https://cfp.cccv.de/39c3/talk/AHCWCJ/ Slides https://cfp.cccv.de/39c3/talk/AHCWCJ/feedback/ false 2025-12-29T14:45:00+01:00 14:45 01:00 Zero 39c3-making-the-magic-leap-past-nvidia-s-secure-bootchain-and-breaking-some-tesla-autopilots-along-the-way en Security Talk The Tegra X2 is an SoC used in devices such as the Magic Leap One, and Tesla's Autopilot 2 & 2.5 promising a secure bootchain. But how secure really is the secure boot? In this talk I go over how I went from a secured Magic Leap One headset, to exploiting the bootloader over USB, to doing fault injection to dump the BootROM, to finding and exploiting an unpatchable vulnerability in the BootROM's USB recovery mode affecting all Tegra X2s. In mid 2024, a friend approached me about Magic Leap making their TX2 based XR headsets little more than a paperweight by disabling the mandatory activation servers. I morally dislike this, companies shouldn't turn functional devices into e-waste just because they want to sell newer devices. After obtaining one, and poking at the Fastboot implementation, I discovered it was based off NVIDIA's Fastboot implementation, which is source available. I found a vulnerability in the NVIDIA provided source code in how it unpacks SparseFS images (named sparsehax), and successfully blindly exploited the modified implementation on the Magic Leap One. I also found a vulnerability in it that allowed gaining persistence via how it loads the kernel DTB (named dtbhax). Still unsatisfied with this, I used fault injection to dump the BootROM from a Tegra X2 devkit. In the BootROM I discovered a vulnerability in the USB recovery mode. Exploiting this vulnerability proved difficult due to only having access to memory from the perspective of the USB controller. I will explain what was tried, why it didn't work, and how I eventually got code execution at the highest privilege level via it. As I will demonstrate, this exploit also functions on Tesla's autopilot hardware. https://cfp.cccv.de/media/39c3/submissions/SVTNYA/ap_kMANWzf_erPhzvE.webp Elise Amber Katze https://events.ccc.de/congress/2025/hub/event/detail/making-the-magic-leap-past-nvidia-s-secure-bootchain-and-breaking-some-tesla-autopilots-along-the-way https://cfp.cccv.de/39c3/talk/SVTNYA/ https://cfp.cccv.de/39c3/talk/SVTNYA/feedback/ false 2025-12-29T16:00:00+01:00 16:00 01:00 Zero 39c3-apt-down-and-the-mystery-of-the-burning-data-centers en Security Talk In August 2025 Phrack published the dump of an APT member's workstation. It was full of exploits and loot from government networks, cell carriers and telcos. The dump sparked a government investigation, and corpos like LG and Korea Telecom were asked to explain themselves. Hours before an onsite audit, the data center mysteriously caught fire, destroying almost a hundred servers. Then another data center burned - and unfortunately, there was even one death. The talk aims to revisit this mysterious sequence of tragic incidents. [TW: Suicide, self-harm] In August 2025 Phrack published the dump of an APT member's workstation. The attacker was most likely Chinese, working on targets aligned with North Korea's doctrine. The dump was full of exploits, attacker tools and loot. Data from government networks, cell carriers and telcos, including server databases and loads or private keys stemming from the government PKI. The attacker had maintained a steady foothold in various targets in South Korea and Taiwan before accidentally "losing" their workstation. The dump sparked a government investigation, and big corporations like LG, Lotte and Korea Telecom were asked to explain themselves. The government also mandated an on-site audit in the data center where the hacks had taken place. On the day of the audit, some li-ion batteries in the data center mysteriously caught fire. The blaze destroyed close to 100 servers (which had no backup) and plunged public service in South Korea into disarray. Shortly after, the Lotte data center burned as well - the corporation had been victim of a breach recently, albeit by a different threat actor. In the beginning of October, one of the officers examining the government data center fire tragically died by his own hand. The talk aims to revisit this mysterious sequence of events that was started by an article in Phrack [#72](https://events.ccc.de/congress/2025/hub/tag/72). It doesn't hope to give answers or a solution, but narrates a story that could be from a spy thriller. Caution: Conspiracies and technical gore could be present. [TW: Suicide, self-harm] Christopher Kunz Sylvester https://events.ccc.de/congress/2025/hub/event/detail/apt-down-and-the-mystery-of-the-burning-data-centers https://cfp.cccv.de/39c3/talk/L8REGS/ Slide deck with animations split into individual slides https://cfp.cccv.de/39c3/talk/L8REGS/feedback/ false 2025-12-29T17:15:00+01:00 17:15 01:00 Zero 39c3-wer-liegt-hier-wem-auf-der-tasche-genug-mit-dem-burgergeld-fetisch-sturmt-die-palaste de Ethics, Society & Politics Talk Das Bürgergeld ist Geschichte. An seine Stelle tritt eine Grundsicherung, die auf kalkulierten Verfassungsbruch setzt. Totalsanktionen, Vermittlungsvorrang, Quadratmeterdeckel, jeder Move bedeutet umfassendere staatliche Überwachung. Die Bezahlkarte soll in Hamburg perspektivisch zunächst auf Sozialhilfe‑ und Jugendhilfebeziehende ausgeweitet werden. Sind Bürgergeldbeziehende als nächstes dran? Die neue Grundsicherung trumpft Hartz IV in seiner Grausamkeit und ist ein Damoklesschwert über Erwerbslosen und allen, die Lohnarbeit machen. Zugleich nimmt die Zahl der Milliardäre und Mulitmillionäre stetig zu. Finanzbetrug durch Überreiche wird mehr oder weniger tatenlos zugesehen, während das Phantom des Bürgergeld-Totalverweigerers seit Jahren durch die Medien getrieben wird. Wie der Angriff auf den Sozialstaat sich auf die Betroffenen in der Praxis auswirkt und was wir als Zivilgesellschaft tun können, um nicht nur tatenlos zusehen zu müssen, darum geht es in diesem Talk. https://cfp.cccv.de/media/39c3/submissions/BX3NXQ/Steuerbetrug_vs._Sozialbetrug_2_7_mbV5O_Bh8lOKc.webp Helena Steinhaus https://events.ccc.de/congress/2025/hub/event/detail/wer-liegt-hier-wem-auf-der-tasche-genug-mit-dem-burgergeld-fetisch-sturmt-die-palaste https://cfp.cccv.de/39c3/talk/BX3NXQ/ https://cfp.cccv.de/39c3/talk/BX3NXQ/feedback/ false 2025-12-29T19:15:00+01:00 19:15 01:30 Zero 39c3-transkultureller-hack-auf-die-klassische-musikszene-vortrag-und-konzert de Art & Beauty Talk Das Bridges Kammerorchester hackt die klassische Musikszene, indem es die Regeln des traditionellen Konzertbetriebs aufbricht: Musiker*innen mit und ohne Flucht- und Migrationsbiografie bringen Instrumente wie Oud, Tar, Kamanche oder Daf in die europäische Orchestertradition. Statt überwiegend Werke verstorbener männlicher, europäischer Komponisten zu spielen, komponieren die Mitglieder ihre Musik selbst – ein radikaler Perspektivwechsel hin zu Vielfalt und Selbstbestimmung. Im Vortrag zeigen sie anhand von Hörbeispielen und persönlichen Geschichten, wie diese Hacks entstehen und machen im Anschluss in einem Konzert die musikalische Vielfalt live erlebbar. Das transkulturelle Bridges Kammerorchester hackt die klassische Musikszene: es bringt Musizierende mit und ohne Flucht- und Migrationsbiografie zusammen und integriert Instrumente und Musikstile in die europäische Orchestertradition, die dort traditionell nicht vorgesehen sind. Neben klassischen Orchesterinstrumenten spielen Instrumente wie Oud, Tar, Tiple, Kaval, Kamanche, Shudraga, Daf und Riq zentrale Rollen. Ihre Musik komponieren die Orchestermitglieder überwiegend selbst. Auch das ist ein Hack auf die klassische Musikszene, die bisher überwiegend Werke verstorbener männlicher Komponisten interpretiert. So steht die Musik des Bridges Kammerorchester für Vielfalt und Selbstbestimmung und macht die Diversität der in Deutschland lebenden Gesellschaft hörbar. Im Vortrag zeigen Mitglieder des Bridges Kammerorchesters anhand von Erfahrungen und Hörbeispielen – live und per Video – wie sie die klassische Musikszene hacken. Sie geben Einblicke in ihren kollektiven, heterogenen Kompositionsprozess, berichten von Freiheiten, Herausforderungen und Erfahrungen mit Publikum und Veranstaltern. Persönliche Migrationsgeschichten verdeutlichen, wie diese die musikalische Perspektive und Identität des Orchesters prägen. Anschließend folgt ein Konzert, das die Vielfalt ihrer Musik erlebbar macht. *Eine Aufzeichnung dieser Session ist verfügbar [auf dem YouTube-Kanal von Bridges](https://youtu.be/R0kzNxpKaJQ).* https://cfp.cccv.de/media/39c3/submissions/TPSDAQ/Bridges_Kammerorchester__Salar_Baygan_Ko_B80CQb9.jpg Johanna-Leonore Dahlhoff Peter Klohmann Alireza Meghrazi Solouklou Mirweis Neda Maria Carolina Pardo Reyes Eduardo Sabella Sarah Luisa Wurmer Berivan Canbolat https://events.ccc.de/congress/2025/hub/event/detail/transkultureller-hack-auf-die-klassische-musikszene-vortrag-und-konzert https://cfp.cccv.de/39c3/talk/TPSDAQ/ https://cfp.cccv.de/39c3/talk/TPSDAQ/feedback/ false 2025-12-29T21:05:00+01:00 21:05 00:40 Zero 39c3-race-conditions-transactions-and-free-parking en Security Talk ORM's and/or developers don't understand databases, transactions, or concurrency. After the [Air France-KLM dataleak](https://media.ccc.de/v/37c3-lightningtalks-58027-air-france-klm-6-char-short-code) I kept repeating this was not a real hack, and confessed I always wanted to hack a system based on triggering race conditions because the lack of proper transactions. This was way easier than expected. In this talk I will show how just adding `$ seq 0 9 | xargs -I@ -P10 ..` can break some systems, and how to write safe database transactions that prevent abuse. In this talk I will explain what race conditions are. Many examples of how and why code will fail. How to properly create a database transaction. The result of abusing this in real life (e.g. free parking). Benjamin W. Broersma https://events.ccc.de/congress/2025/hub/event/detail/race-conditions-transactions-and-free-parking https://cfp.cccv.de/39c3/talk/ZUJZDY/ https://cfp.cccv.de/39c3/talk/ZUJZDY/feedback/ false 2025-12-29T22:05:00+01:00 22:05 00:40 Zero 39c3-light-in-the-dark-net en Science Talk Science is hard and research into the usage of the Tor network is especially so. Since it was designed to counter suveillance, it gathering reliable information is difficult. As a consequence, the studies we do have, have yielded very different results. This talk investigates the root causes of contradicting studies by highlighting how slight changes in methodology or data selection completely change the results and thereby our understanding of what the Darknet is. Whether you consider it the last bastion of freedom or a haven of crime, this talk will tell you where to look and what to ignore in order to confirm your current opinion. And in case you are open to changing it, we have some food for thought for you. Onion services can be considered one of the most controversial aspects of the Tor network, because they allow the anonymous hosting of services, which has enabled the creation of illegal services which are difficult for law enforcement to shut down. Defenders argue that this is a price worth paying to ensure free speech for people who could otherwise not speak up or run their own services. This obviously raises the question what onion services are being actually used for in practice. Many researchers have tried to answer this question in the past. Based on their work we already know a few things: - 9% of all Websites on the Darknet are marketplaces [1] - 2.7% of all Websites on the Darknet are marketplaces [2] - 50% of all Websites on the Darknet are marketplaces [3] - 8.4% of all Websites on the Darknet are marketplaces [4] - 27% of all Websites on the Darknet are marketplaces [5] - 34.8% of all Websites on the Darknet are marketplaces [6] No, this is not a copy and paste error, all of the above statements can be found in peer-reviewed scientific publications. All of these results are valid on their own and constitute valuable contributions to science, but it does not take an expert to notice the contradictions in their findings. The reasons for these inconsistencies are the main topic of this talk. We will discuss the information available to researchers and the limitations originating from it. Challenges and current disagreements when it comes to interpreting available data will be addressed along with common misrepresentations of research results. We will highlight how the choice of data sources can predetermine the final result before a study has even begun, how minor changes to definitions can lead to completely different results and how important context is when interpreting data. Armed with this knowledge, we can tackle the challenge to find out what we know about the Darknet, what we might figure out in the future, what we can reasonably assume but will never be able to prove, and what we will (hopefully) never know. ----------------------------------------- Sources [1] https://doi.org/10.1049/iet-ifs.2015.0121 [2] https://doi.org/10.1016/j.future.2024.03.025 [3] https://doi.org/10.1145/3600160.3600167 [4] https://doi.org/10.1109/INFOCOM53939.2023.10229057 [5] https://doi.org/10.1109/ICDCSW.2014.20 [6] https://doi.org/10.1080/00396338.2016.1142085 Tobias Höller https://events.ccc.de/congress/2025/hub/event/detail/light-in-the-dark-net https://cfp.cccv.de/39c3/talk/TWSULE/ Slides https://cfp.cccv.de/39c3/talk/TWSULE/feedback/ false 2025-12-29T23:00:00+01:00 23:00 01:00 Zero 39c3-human-microservices-at-the-dutch-railways-modern-architecture-ancient-hardware en Hardware Talk The Dutch railways have been operating an increasingly complicated network of trains for over 80 years. The task of overseeing it is far too complex for a single human. As such, a network of specifically scoped humans has been connected. Over time, computers and software have been introduced into the system, but today there is still a significant role for humans. This talk describes the network of "human microservices" that is involved in the Dutch Railways' day to day operation from the eyes of a software developer. When a train breaks down in the Netherlands, a system of interconnected humans is shifted into gear. The current state of that system has been developed for over 80 years and as such should be seen as an architectural marvel. Even though there is nowadays a significant amount of software involved in the process, the people involved are still very much necessary. This talk describes the processes and roles involved in the Dutch railway day to day operations. We will start at a broken down train on a busy track and work our way towards solutions including dragging the train, evacuating travelers and redirecting other trains on that trajectory. We will explore this from a software developer's perspective. We will consider the people involved as an ancient form of hardware, and the protocols between them as software. We will also go over the more modern additions to the system: phone lines and software running on actual computers. After our investigation you will have a new understanding of the complexity of running a railway network. And we will ask ourselves: is this an outdated system that needs to be digitized? Or is this actually a modern system with microservices and a "human in the loop"? https://cfp.cccv.de/media/39c3/submissions/AAHZK8/Utrecht_NL_2010-00-00_00.00_Interieu_Z9_TeifYeL.webp Maarten W https://events.ccc.de/congress/2025/hub/event/detail/human-microservices-at-the-dutch-railways-modern-architecture-ancient-hardware Slides https://cfp.cccv.de/39c3/talk/AAHZK8/ https://cfp.cccv.de/39c3/talk/AAHZK8/feedback/ false 2025-12-30T00:15:00+01:00 00:15 00:40 Zero 39c3-spectre-in-the-real-world-leaking-your-private-data-from-the-cloud-with-cpu-vulnerabilities en Security Talk Transient execution CPU vulnerabilities, like Spectre, have been making headlines since 2018. However, their most common critique is that these types of vulnerabilities are not really practical. Even though it is cool to leak `/etc/shadow` with a CPU bug, it has limited real-world impact. In this talk, we take Spectre out for a walk and let it see the clouds, by leaking memory across virtual machine boundaries at a public cloud provider, bypassing mitigations against these types of attacks. Our report was awarded with a $151,515 bug bounty, Google Cloud's highest bounty yet. Seven years ago, Spectre and Meltdown were announced. These two vulnerabilities showed that instructions executed by the CPU might accidentally access secret data. This secret data can contain files cached from disk, cryptographic keys, private information, or anything else that might be stored in memory. An attacker can use Spectre to learn the value of that secret data, even though the attacker is not supposed to have access to it. Even though this sounds problematic, there is a reason why these type of vulnerabilities haven't had a significant real-world impact. Mitigations make it much harder to pull off, and an attacker needs a form of remote code execution anyway to trigger the relevant CPU instructions. If an attacker can already execute arbitrary code, then Spectre is probably not what you should be worried about. For regular users, these CPU vulnerabilities are likely not that much of a threat. However, that is not the case for public cloud providers. Their business model is to provide *remote code execution as a service*, and to rent out shared hardware resources as efficiently as possible. Customers run their system in an seemingly isolated virtual machine on top of shared physical hardware. Because customers can run anything they want on these systems, public cloud providers must treat these workloads as untrusted. They have to assume the worst case scenario, i.e. that an attacker is deliberately trying violate the confidentiality, integrity or availability of their systems, and, by extension, their customers' systems. For transient execution vulnerabilities like Spectre, that means that they enable all reasonable mitigations, and some more. In this talk, we show that transient execution attacks can be used on real-world systems, despite the deployed software mitigations. We demonstrate this by silently leaking secret data from another virtual machine at a major global cloud provider, defeating virtual machine isolation without leaving a trace. Additionally, we'll discuss our coordinated disclosure process, the currently deployed mitigations and how future mitigations could address the issue. Thijs Raymakers https://events.ccc.de/congress/2025/hub/event/detail/spectre-in-the-real-world-leaking-your-private-data-from-the-cloud-with-cpu-vulnerabilities https://cfp.cccv.de/39c3/talk/ATYLN9/ https://cfp.cccv.de/39c3/talk/ATYLN9/feedback/ false 2025-12-29T11:00:00+01:00 11:00 00:40 Fuse 39c3-the-museum-of-care-open-source-survival-kit-collection en Art & Beauty Talk The talk is about the ideas behind setting up the David Graeber Institute and the Museum of Care. The Survival Kit Collection brings together collectives developing open source "social technologies" —spirulina farms, self-replicating 3D printers, modular housing, low-cost water systems, and ... art and education. In 2019, together with David Graeber, we held the first workshop about the Museum of Care at CCC to reimagine the relation between freedom, technology and value. Over these 6 years, the Museum of Care and the David Graeber Institute have experimented with various projects: the survival collection, Visual Assembly, and creating an open space for horizontal knowledge production—something we hope to develop into an actual University. We think humanity could already be living in a society of abundance and communal luxury. We have the technologies to produce enough for everyone to have everything. The issue isn't technological but social. This is why we need a Museum (of Care): museums are among the few places that create, distribute, and preserve what a society values. What will be at the session: We'll tell in more detail about the concept of the Museum of Care on abandoned ships (of which, according to Maritime Foundation data, there are more than 4,500 in the world). We'll talk about the halls of our museum: the Hall of Giants and other emerging spaces. Projects we're building—spirulina farms, 3D printers—in Saint Vincent (Caribbean) and Kibera Art District, Nairobi Kenya, Playground designed that communities can construct with nearly no resources. Can we actually build a nomadic museum proud not of its unique exhibits but of how easily they spread and get replicated? Then we will move to an open conversation about what poetic technologies are and how they differ from bureaucratic ones. Some people may have read David Graeber's book The Utopia of Rules; here you can download his other texts that are less widely known or not yet published. We would very much like to explore the question of poetic and bureaucratic technologies together with you. To facilitate this discussion, the David Graeber Institute has invited Alistair Parvin, creator of the Wiki House project, to join Nika Dubrovsky in conversation. The discussion continues in the format of a Visual Assembly—focused on building a distributed, non-hierarchical, genuinely open University with different ideas of funding and knowledge production. This is the very beginning of the process so all input is very much welcome. We'd welcome any ideas, critiques, or proposals for collaboration. https://events.ccc.de/congress/2025/hub/https://usercontent.events.ccc.de/congress/2025/hub/usercontent/e/29f541dc7b4d/e/29f541dc7b4d/Screenshot_2025-10-24_at_11.03.09_6fQCU_EoJfWpK.webp Nika Dubrovsky https://events.ccc.de/congress/2025/hub/event/detail/the-museum-of-care-open-source-survival-kit-collection On Roy Baskar: about technology Several texts by David Graeber about poetic and bureaucratic technologies https://cfp.cccv.de/39c3/talk/VLFQSQ/ Poetic Technology, by David Graeber Institute Posters about Poetic Technology with David Graeber's quotes https://cfp.cccv.de/39c3/talk/VLFQSQ/feedback/ false 2025-12-29T11:55:00+01:00 11:55 00:40 Fuse 39c3-hacking-karlsruhe-10-years-later de Ethics, Society & Politics Talk "Wir gehen nach Karlsruhe!“ – das klang vor zehn Jahren nach Aufbruch und juristischem Hack. Heute ist klar: Strategische Prozessführung ist kein Sprint, sondern ein zähes, manchmal frustrierendes Dauerprojekt. In diesem Talk ziehen wir Bilanz: Was haben wir mit zivilgesellschaftlichen Verfassungsbeschwerden im Bereich Technologie erreicht – und wo sind wir gescheitert? Welche Fehler würden wir heute vermeiden, welche Wege waren richtig? Und was bedeutet es, wenn das höchste deutsche Gericht zunehmend weniger Lust auf digitalpolitische Grundrechtsfragen zeigt? Ein realistischer Blick hinter die Kulissen strategischer Klagen – und die Frage: Wie hackt man das Rechtssystem im Jahr 2025? Wenn Gesetze Grundrechte verletzen, warum nicht das Bundesverfassungsgericht hacken – mit Strategie, Teamwork und guter Begründung? Aus dieser Idee ist inzwischen ein zentrales Werkzeug zivilgesellschaftlicher Gegenmacht geworden: Strategische Prozessführung. Das Prinzip ist einfach: Gesetze nicht nur kritisieren, sondern systematisch angreifen, mit gezielten Verfassungsbeschwerden gegen Überwachung, Zensur und staatliche Eingriffe in die digitale Freiheit. Seitdem hat sich viel getan. Organisationen wie die Gesellschaft für Freiheitsrechte (GFF) haben den Weg nach Karlsruhe professionalisiert und Verfahren angestoßen, die viele aus den Nachrichten kennen: gegen die Vorratsdatenspeicherung, gegen das BND-Gesetz zur Auslandsüberwachung, gegen den Einsatz von Palantir, und gegen den Einsatz von Staatstrojanern. Einige dieser Verfahren waren erfolgreich und haben Gesetze gekippt. Andere sind krachend gescheitert – oder hängen seit Jahren in Karlsruhe fest. Dabei zeigt sich: Der Weg zum Urteil wird härter, die Erfolgsaussichten kleiner, und das Verfassungsgericht ist nicht mehr der progressive Motor, der es mal war. Dieser Talk zieht eine ehrliche Bilanz: Was bringt strategische Prozessführung wirklich? Was lässt sich aus Erfolgen und Misserfolgen lernen? Welche Fälle lohnen sich – und wo wird der Rechtsweg zur Sackgasse? Und wie verschiebt sich das Ganze inzwischen auf die europäische Ebene – wo neue Schauplätze wie der Digital Services Act oder der AI Act warten? Keine juristische Vorlesung, sondern ein Erfahrungsbericht aus zehn Jahren digitaler Grundrechtsarbeit. Es geht um Taktik, Fehlentscheidungen, unerwartete Allianzen – und um die Frage, wie man auch heute noch im Rechtssystem rütteln kann, wenn die Türen in Karlsruhe enger werden. Der Vortrag wird gehalten von Simone Ruf und Jürgen Bering von der Gesellschaft für Freiheitsrechte. Jürgen Bering Simone Ruf https://events.ccc.de/congress/2025/hub/event/detail/hacking-karlsruhe-10-years-later https://cfp.cccv.de/39c3/talk/S3FPQX/ https://cfp.cccv.de/39c3/talk/S3FPQX/feedback/ false 2025-12-29T12:50:00+01:00 12:50 00:40 Fuse 39c3-be-modded-exploring-and-hacking-the-vital-bracelet-ecosystem en Hardware Talk The Vital Bracelet series is an ecosystem of interactive fitness toys, content on memory chips, and apps that talk via NFC. In this talk, we'll explore the hardware and software of the series, from its obscure CPU architecture, to how it interacts with the outside world, from dumping OTP ROMs and breaking security, to making custom firmware. The Vital Bracelet series, active from 2021 to 2024, was a line of toys that revolved around a number of fitness bracelets that encouraged exercise by raising characters from the Digimon series, and expanding into tokusatsu and popular anime characters later. Think of it as Tamagotchi, but nurturing through exercise instead of button presses. In this presentation, we'll look at the different parts of this series' ecosystem, how they work, and the different ways to circumvent various security measures and customize the devices' behavior. We start by looking at the first Vital Bracelet, with a quick introduction to hardware reverse engineering and how to dump firmware out of flash. Following that, we will take a look at the microcontroller used in the devices, and its obscure instruction set architecture. This will lead into an exploration of how to reverse engineer code when you are missing a significant portion of it, and how the embedded ROM was dumped. After this, we will look at the DRM applied to content, and how it was circumvented. Next, the device's NFC capabilities will be explored. With the release of the Vital Bracelet BE, which introduced upgradable firmware, came new challenges and opportunities. We will take a look at the new content format and additional DRM measures it incorporated, plus how the device's bootloader was dumped despite its signature verification scheme. Finally, we will take a look at the process for modding the various Vital Bracelet releases, and some techniques to use while writing patches. The material in this talk can be applied beyond just the Vital Bracelet series, and can be useful if you want to explore other electronic toys, or just hardware reverse engineering in general. cyanic https://events.ccc.de/congress/2025/hub/event/detail/be-modded-exploring-and-hacking-the-vital-bracelet-ecosystem https://cfp.cccv.de/39c3/talk/GMWAPR/ Slide deck https://cfp.cccv.de/39c3/talk/GMWAPR/feedback/ false 2025-12-29T13:50:00+01:00 13:50 00:40 Fuse 39c3-when-8-bits-is-overkill-making-blinkenlights-with-a-1-bit-cpu en Hardware Talk Over the last half year I have explored the Motorola mc14500 - a CPU with a true one-bit architecture - and made it simulate Conway's Game of Life. This talk gives a look into how implementing a design for such a simplistic CPU can work, and how it's possible to address 256 LEDs and half a kiloword of memory with just four bits of address space. In the late seventies, Motorola created a very cheap CPU, intended to replace logic circuits made from electromechanical relays. The resulting IC is so minimalistic that it can hardly be recognized as a CPU: Its data bus is just a single bit wide, it has no program counter, and the address bus isn't connected to the cpu at all. Yet, with just a few support components, and some clever programming, it can be made to do all sorts of things. We'll explore hardware design and programming by taking a look at my implementation of Conway's Game of Life, and answer the question of how one can address 512 words of memory, as well as some other peripherals, using just four bits of address space. Outline: * History and theory of operation of the mc14500 * Writing programs that process one bit at a time * A closer look at the hardware I built, including its wacky peripherals * Demonstration * Q&A https://cfp.cccv.de/media/39c3/submissions/7GDZTJ/PXL_20251018_191058916_WI8fN2P_wot3tIy_XJIm103.webp girst (Tobi) https://events.ccc.de/congress/2025/hub/event/detail/when-8-bits-is-overkill-making-blinkenlights-with-a-1-bit-cpu https://cfp.cccv.de/39c3/talk/7GDZTJ/ https://cfp.cccv.de/39c3/talk/7GDZTJ/feedback/ false 2025-12-29T14:45:00+01:00 14:45 01:00 Fuse 39c3-learning-from-south-korean-telco-breaches en Security Talk 2025 was a bad year for South Korean mobile network operators. All three operators (SK Telecom, KT, LG U+) were affected by breach in some part of their respective network: HSS of SK Telecom, femtocells of KT. Meanwhile, handling of the breach by each operators and post-mortem analysis of each breaches have stark differences. The technical details and implemented mitigations are often buried under the vague terms, and occasionally got lost in translation to English. In this talk, I will cover the technical aspects of SK Telecom and KT's breach, and how the operators are coping to the breach and what kind of measurements have been performed to secure their network. This talk will cover the public information and experiments related to the South Korean telco breaches in 2025. This talk will cover SK Telecom's HSS breach (final results announced), KT's femtocell breach (investigation ongoing) and related operator billing fraud, and revisit Phrack report on KT and LG U+ breach. We also give a light on the detail regarding the implemented mitigation and diaster response of each operators. SK Telecom's HSS breach is attributed to a variant of BPFDoor malware, resulting leakage of critical operator data related to subscriber authentication and accounting. They replaced the SIM cards of all 23 million subscribers, and implemented additional mechanism to track the possible cloning of the SIM card. We analyze the aftermath and how it will effectively protect against the said attack. KT's femtocell and operator billing breach (investigation still ongoing as the time of writing) is attributed to the mismanagement of KT's femtocell, allowing an external attacker to mimick the behavior of KT's legitimate femtocell and use as a cellular interception device. This is a modern implementation of the remarkable research "Weaponizing Femtocells" back in 2012, and new cellular technologies like VoLTE have changed the possible attack vectors. We provide a possible theory on how the attack would be possible, based on the publicly available information and previous researches. Finally, we also cover the characteristics of South Korean mobile market and how the media caused the inaccurate analysis and FUD (fear, uncertainty, and doubt). In particular, how SMS-based 2FA is tied to personal authentication and how everything is strongly bound to the personal identity. Early media reports could be attributed to the information "lost in translation" and inaccurate information in English-language articles when the details of the breach were not widely shared. We try to correct the information (also in the official incidence report) and showcase how not to report the breach in general. Shinjo "peremen" Park Yonghyu "perillamint" Ban https://events.ccc.de/congress/2025/hub/event/detail/learning-from-south-korean-telco-breaches https://cfp.cccv.de/39c3/talk/WHGYRX/ Slides (final version) https://cfp.cccv.de/39c3/talk/WHGYRX/feedback/ false 2025-12-29T16:00:00+01:00 16:00 01:00 Fuse 39c3-von-wegen-eisblumen-wie-man-mit-code-satelliten-und-schiffsexpeditionen-die-bunte-welt-des-arktischen-phytoplanktons-sichtbar-macht de Science Talk Die Arktis ist eine Region, in der die Sonne monatelang weg ist, dickes Meereis den Weg versperrt und deshalb Forschungsdaten ziemlich rar sind. Kompliziert also, herauszufinden was im Wasser blüht! Mit einer Kombination aus Satellitenbildern, Expeditionen und Modellsimulationen auf Hochleistungsrechnern versuche ich, das Verborgene sichtbar zu machen: die faszinierende, farbenfrohe Welt des arktischen Phytoplanktons. Im Arktischen Ozean wird immer deutlicher, wie stark die globale Erwärmung den Rückgang des Meereises und das marine Ökosystem beeinflussen. Winzige Organismen, das Phytoplankton, bilden die Grundlage des Nahrungsnetzes durch den Aufbau von Biomasse und spielen so eine zentrale Rolle im globalen Kohlenstoffkreislauf. Dabei werden sie in der Arktis stark von den jahreszeitlichen Schwankungen der Polarnacht/-tag, der Meereisausdehnung und der sich verändernden Umwelt beeinflusst. Doch das Phytoplankton ist nicht nur ökologisch bedeutsam, sondern auch erstaunlich vielfältig und farbenfroh – wie eine bunte Blumenwiese im Ozean! Spannend bleiben dabei auch die Fragen, was die Vielfalt des Phytoplanktons ausmacht, wie diese eine Anpassung an die Umweltveränderungen ermöglicht und wie sich das arktische Ökosystem unter verschiedenen Klimawandelszenarien entwickeln könnte. Dieser Vortrag lädt euch ein, in die eisigen Welten des arktischen Ozeans einzutauchen, um dem grundlegenden Baustein des arktischen Ökosystems, dem Phytoplankton, auf den Grund zu gehen. Moritz Zeising (er/he) https://events.ccc.de/congress/2025/hub/event/detail/von-wegen-eisblumen-wie-man-mit-code-satelliten-und-schiffsexpeditionen-die-bunte-welt-des-arktischen-phytoplanktons-sichtbar-macht https://cfp.cccv.de/39c3/talk/KXGMHG/ Folien https://cfp.cccv.de/39c3/talk/KXGMHG/feedback/ false 2025-12-29T17:15:00+01:00 17:15 01:00 Fuse 39c3-the-last-of-us-fighting-the-eu-surveillance-law-apocalypse en Ethics, Society & Politics Talk The virus of surveillance is spreading across the European Union. In the form of its "ProtectEU" Internal Security Strategy, the European Commission is planning to attack encryption, re-introduce mandatory data retention and strengthen Europol and Frontex, the main agents of its oppressive law enforcement infrastructure. In this talk, we will journey the wastelands of the EU surveillance apocalypse together: We will take a close look at what politicians are planning to undermine our fundamental rights, the technology involved, and the real harms we must fight. From there, we will chart pathways to resistance and collective immunity against a surveillance agenda that requires us to form new alliances and re-think mobilization. Admidst its current push to remove the rules that have protected the EU's environment, consumer and fundamental rights, there is one area the European Commission happily calls for more regulation: Internal security. The recent "ProtectEU" Internal Security Strategy does little to protect Europeans, and instead foresees attacks on encryption, the re-introduction of mandatory data retention and the strengthening of Europol and Frontex, the main agents of the EU's oppressive law enforcement infrastructure. In this talk, we will introduce the strategy and its main pillars, explain its political and legal contexts, and take a look at what it would mean for our fundamental rights, access to encryption, and IT security if enacted. But not all hope is lost (yet), and together we want to chart pathways to meaningful resistance. To do so, we will help understand the maze of the EU's lawmaking process and identify pressure points. We will then look back at past fights, lessons learned and new opportunities to act in solidarity against a surveillance agenda that is truly apocalyptic. https://cfp.cccv.de/media/39c3/submissions/AD7RSU/afljnc_1ytkT0b_eSZrBQc.webp Svea Windwehr Chloé Berthélémy https://events.ccc.de/congress/2025/hub/event/detail/the-last-of-us-fighting-the-eu-surveillance-law-apocalypse https://cfp.cccv.de/39c3/talk/AD7RSU/ https://cfp.cccv.de/39c3/talk/AD7RSU/feedback/ false 2025-12-29T19:15:00+01:00 19:15 00:40 Fuse 39c3-netzpolitik-in-der-schweiz-zwischen-bodensee-und-matterhorn de CCC & Community Talk Auch in der Schweizer Netzpolitik ging es im auslaufenden Jahr drunter und drüber. Wir blicken mit gewohntem Schalk auf das netzpolitische Jahr 2025 zwischen Bodensee und Matterhorn zurück - und diskutieren jene Themen, die relevant waren und relevant bleiben. **Themen sind unter anderem:** **E-ID und E-Collecting:** Die netzpolitische Community hat nicht nur eine privatisierte E-ID verhindert sondern auch den Datenschutz als zentrales Prinzip verankert und einen beispielhaften Gesetzgebungsprozess begleitet. Das Gleiche haben wir bei E-Collecting vor, mit dem wir die direkte Demokratie der Schweiz auf ein neues Level heben wollen. **Elektronisches Gesundheitsdossier:** Was macht man, um eine Verschlechterung bei einem Produkt zu kaschieren? Richtig, man nimmt ein Rebranding vor. Und so heisst das E-PD nun E-GD. **Kabelaufklärung:** Im Dezember überraschte uns das Bundesverwaltungsgericht mit einem wegweisenden Urteil: Es beurteilte die Kabelaufklärung als nicht vereinbar mit der Bundesverfassung und der Europäischen Menschenrechtskonvention. Lässt das ganze aber 5 Jahr laufen. **What the VÜPF:** Wie die Schweiz zudem plant, das freie Internet weitgehend abzuschaffen. Wie der Stand der Verschärfung ist. Was wir und du dagegen tun können? **Plattformregulierung:** Ein Vorschlag zur Plattformregulierung wurde vom Bund ausgearbeitet - und nach der Verhängung von 39% Strafzoll still und heimlich in der Schublade versenkt. Doch der Bund fasste Mut - und wagt einen zaghaften Aufbruch. **KI-Regulierung & Leistungsschutzrecht:** Und wieso getraut sich der Bund, ein Leistungsschuzrecht einzuführen? Und mit der Motion «Gössi» KI-Sprachmodelle mit Schweizer Daten zu gefährden? (Spoiler: wegen der Verleger-Lobby) **Community in der Schweiz:** Winterkongress, Diversity und andere Aktivitäten. Nach dem Vortrag sind alle interessierten Personen eingeladen, die [Diskussion in einer self-organized Session](https://events.ccc.de/congress/2025/hub/en/event/detail/treffen-der-netzpolitischen-community-der-sch_uoca) fortzusetzen. Es werden Aktivist:innen von verschiedenen Organisationen der Netzpolitik in der Schweiz anwesend sein. https://cfp.cccv.de/media/39c3/submissions/TRPMAN/swiss-flag_001_VqavHlJ_YP5E3GO_koLNUuT__Fp9cWBs.webp Kire Rahel https://events.ccc.de/congress/2025/hub/event/detail/netzpolitik-in-der-schweiz-zwischen-bodensee-und-matterhorn https://cfp.cccv.de/39c3/talk/TRPMAN/ Präsentation https://cfp.cccv.de/39c3/talk/TRPMAN/feedback/ false 2025-12-29T20:10:00+01:00 20:10 00:40 Fuse 39c3-the-angry-path-to-zen-amd-zen-microcode-tools-and-insights en Security Talk EntrySign opened the door to custom microcode on AMD Zen CPUs earlier this year. Using a weakness in the signature verification we can load custom microcode updates and modify behavior of stock AMD Zen 1-5 CPUs. While AMD has released patches to address this weakness on some CPUs, we can still use unpatched systems for our analysis. In this talk we cover what we found out about microcode, what we saw in the microcode ROM, the tooling we build, how we worked to find out more and how you can write & test your own microcode on your own AMD Zen systems. We have our tools up on https://github.com/AngryUEFI for everyone to play around with and hopefully help us understand microcode more than we currently do. Modern CPUs often translate the complex, user visible instruction set like x86_64 into a simpler, less feature rich internal instruction set. For simple instructions this translation is done by a fast path decoding unit. However some instructions, like `wrmsr` or `rdrand` are too complex to decode that way. These instructions instead are translated using a microcode decoder that can act almost like an execution engine. The microcode decoder still emits internal instructions into the pipeline, but allows for features like conditional branches and calls & returns. All of this logic happens during a single x86_64 instruction and is usually hidden from the outside world. At least since AMD K8, launched in 2003, AMD CPUs allowed updating this microcode to fix bugs made in the original implementation. Building on our [previous](https://media.ccc.de/v/34c3-9058-everything_you_want_to_know_about_x86_microcode_but_might_have_been_afraid_to_ask) [experience](https://media.ccc.de/v/35c3-9614-inside_the_amd_microcode_rom) with AMD K8 & K10 microcode and [EntrySign](https://bughunters.google.com/blog/5424842357473280/zen-and-the-art-of-microcode-hacking) [published](https://media.ccc.de/v/why2025-156-entrysign-create-your-own-x86-microcode-for-fun-and-profit) earlier this year, we took a closer look at AMD Zen 1-5 CPUs. We build on top of [Zentool](https://github.com/google/security-research/tree/master/pocs/cpus/entrysign/zentool) to understand more instructions and created a set of tools to easily create microcode patches as well as apply them on CPUs. We can modify the behavior of instructions and observe some usually not visible internal state by supplying our own microcode update. Like on K8, we extracted the physical ROM on the CPU using an electron microscope to read the hardcoded microcode on a Zen 1 CPU. Using the understanding of the microcode encoding we could then start disassembling the contents and understand how some instructions are implemented. While there are still a lot of things we don't understand, we could follow control flow and analyze algorithms like the XXTEA decryption of the microcode update. To start off this work, we implemented a set of tools that allow easy testing of microcode updates without the need for a fully featured OS. That way we can run timing tests with low noise and don't risk data corruption if we corrupt a vital instruction. To continue our naming scheme from our work on K8 we dubbed this the AngryTools, all of them available on [GitHub](https://github.com/AngryUEFI). The core components are a UEFI application running from RAM, AngryUEFI, and a Python framework for test writing on a client computer, AngryCAT. AngryUEFI starts on the test system and waits for AngryCAT tests supplied via TCP. These tests usually consist of a microcode update that gets loaded on the target CPU core and a buffer with x64 instructions that get run afterwards. AngryUEFI then sends back information about the test execution. AngryUEFI also recovers most faults caused by invalid microcode, often even allowing reuse of a CPU core after a failed test run. We also added some syscall-like interfaces to support more complex data collection like [IBS](https://reflexive.space/zen2-ibs/). To make it easier to write custom microcode updates we also implemented [ZenUtils](https://github.com/AngryUEFI/ZenUtils), a set of Python tools. So far we support single line assembly and disassembly based on architecture specification for Zen 1 & 2 with limited support for other Zen architectures. We also include a macro assembler that can create a full microcode update from an assembly-like input file. Later we will also extend ZenUtils with utilities to sign and en/decrypt microcode updates. Currently we rely on Zentool for these tasks. We also show some basic examples of how microcode programs work, from a simple CString strlen implementation in a single x64 instruction to a [subleq](https://esolangs.org/wiki/Subleq) VM implemented entirely in microcode. These show off the basics of microcode programming, like memory loads & stores, arithmetic and conditional branches. We are also currently looking at other examples and more complex programs. We hope this talk shows you how to start throwing random bits at your own AMD Zen CPU to figure out what each bit does and help us in further understanding the instruction set. We welcome improvements to the tooling and even entirely new tools to help analyze microcode updates and the ROM. If you are already familiar with EntrySign, we only cover the very basics of it and focus more on what we learned after having a foothold in the microcode. Benjamin Kollenda https://events.ccc.de/congress/2025/hub/event/detail/the-angry-path-to-zen-amd-zen-microcode-tools-and-insights https://cfp.cccv.de/39c3/talk/FM7XDD/ Slides https://cfp.cccv.de/39c3/talk/FM7XDD/feedback/ false 2025-12-29T21:05:00+01:00 21:05 00:40 Fuse 39c3-hegemony-eroding-excavating-diversity-in-latent-space en Art & Beauty Talk Hegemony Eroding is an ongoing art project exploring how generative AI reflects and distorts cultural representation. Its name speaks to its core ambition: to bear witness to the slow erosion of Western cultural hegemony by exposing the cracks in which other cultures shine through. This talk will discuss the blurry boundary between legitimate cultural representation and prejudice in AI-generated media and how generative AI can be used as a tool to explore humanity's digital foot print. It is permeated by a critique of purely profit-driven AI development and it's tendency to blunt artistic exploration and expression. Generative AI models ingest huge datasets gathered all over the web. Unsurprisingly, they reflect decades of Western cultural hegemony. Yet, the hegemony is not absolute. Non-Western motifs, that is, recurring patterns and themes with deep cultural resonance, can be discovered and reproduced across different generative AI models. In this talk I will explain the methods I developed to draw out motifs, the journey I took and what I learned along the way. I will present motifs and use them to outline a space stretching from representation to prejudice on the one hand and western to non-western depiction on the other. Finally, I will make a case for AI as a tool for cultural exploration and discuss how monetary incentives jeopardise this endeavour, adding to the long list of reasons to break up monopolies with transparent, publicly-funded AI-models. https://cfp.cccv.de/media/39c3/submissions/RDABLB/bestes_Beispiel_quer_xS8i0dH_0WOENdh_Xi_cTZCrBB.webp Karim Hamdi https://events.ccc.de/congress/2025/hub/event/detail/hegemony-eroding-excavating-diversity-in-latent-space Hegemony eroding https://cfp.cccv.de/39c3/talk/RDABLB/ a crack one word wide https://cfp.cccv.de/39c3/talk/RDABLB/feedback/ false 2025-12-29T22:05:00+01:00 22:05 00:40 Fuse 39c3-the-spectrum-hackspace-beyond-hacking en CCC & Community Talk The Spectrum is a newly founded queer-feminist, intersectional hackspace centering FLINTA+, disabled, and marginalized beings. We see hacking as playful exploration—of technology, art, and ideas—to reimagine what inclusion and collaboration can be. At 39C3, we share how awareness, accessibility, and transdisciplinary creation can transform community and hack the norm. The Spectrum is a new queer-feminist, intersectional and transdisciplinary hackspace centering FLINTA+, creatures with disabilities, and other marginalized communities founded in 2025. We see hacking as more than code and machines—it’s a way of exploring the world through curiosity, play, and care. By taking things, systems, and ideas apart, we uncover new perspectives and possibilities for change. Our space is built around awareness, inclusion, and open access to knowledge. We aim to create an environment where everyone can learn, share, and experiment freely—without the constraints of “normality.” From art and music to activism and technology, The Spectrum brings together diverse disciplines and beings to co-create, collaborate, and imagine better futures. At 39C3, we want to share our experiences of building such a space: how awareness work and accessibility can shape community dynamics, what transdisciplinary hacking can look like, and how centering marginalized perspectives transforms collective creation. Join us to explore what it means to hack not only systems, but also art, expectations, and realities. https://the-spectrum.space/en/ https://cfp.cccv.de/media/39c3/submissions/CTZNNK/the_spectrum_banner_socials_3_NLDpf0r_9_aY3N4i8.webp sjaelv MultisampledNight https://events.ccc.de/congress/2025/hub/event/detail/the-spectrum-hackspace-beyond-hacking Slides (Web/Canva) https://cfp.cccv.de/39c3/talk/CTZNNK/ Slides (PDF) https://cfp.cccv.de/39c3/talk/CTZNNK/feedback/ false 2025-12-29T23:00:00+01:00 23:00 01:00 Fuse 39c3-von-fuzzern-zu-agenten-entwicklung-eines-cyber-reasoning-systems-fur-die-aixcc de Security Talk Die AI Cyber Challenge (AIxCC) der DARPA hatte zum Ziel, die Grenzen der autonomen Cybersicherheit zu erweitern: Können AI-Systeme Software-Schwachstellen unabhängig, in Echtzeit und ohne menschliche Hilfe identifizieren, verifizieren und beheben? Im Laufe von zwei Jahren entwickelten Teams aus aller Welt „Cyber Reasoning Systems“ (CRS), die in der Lage sind, komplexe Open-Source-Software zu analysieren, Code zu analysieren, reproducer zu generieren, um zu zeigen, dass ein gemeldeter Fehler kein Fehlalarm ist, und schließlich Patches zu synthetisieren. Unser Team nahm an dieser Challenge teil und entwickelte von Grund auf ein eigenes CRS. In diesem Vortrag geben wir Einblicke in den Wettbewerb: Wie funktioniert die LLM-gesteuerte Schwachstellenerkennung tatsächlich, welche Designentscheidungen sind wichtig und wie sind die Finalisten-Teams an das Problem herangegangen? Die AIxCC (DARPA’s AI Cyber Challenge) ist ein zweijähriger Wettbewerb, dessen Ziel es war, die Möglichkeiten der automatisierten Erkennung und Behebung von Sicherheitslücken zu verbessern. Dabei sollte ein autonomes, in sich geschlossenes System entwickelt werden, das Software analysiert, Schwachstellen erkennt, diese mithilfe von Reproducern nachweist und anschließend sichere Patches erzeugt. Unser Team hat sich diesem globalen Experiment angeschlossen und ein eigenes Cyber Reasoning System (CRS) von Grund auf neu entwickelt. Dazu haben wir mehrere Agenten entwickelt. Unser System profitierte von der Kombination klassischer Techniken wie Fuzzing mit modernen Large Language Models (LLMs). Die Synergie zwischen diesen Ansätzen erwies sich als leistungsfähiger als jede der beiden Techniken für sich allein, sodass unser CRS Software auf eine Weise untersuchen und patchen konnte, wie es weder Fuzzing noch LLMs allein leisten konnten. In diesem Vortrag werden wir: - das Konzept und die Ziele hinter AIxCC erläutern - durchgehen, wie ein CRS tatsächlich funktioniert und wie wir unseres entwickelt haben - zeigen, wie LLMs traditionelle Fuzzing- und Analyse-Techniken unterstützen können - Beobachtungen zu den Strategien der Finalisten-Teams teilen Mischa Meier (mmisc) Annika Kuntze https://events.ccc.de/congress/2025/hub/event/detail/von-fuzzern-zu-agenten-entwicklung-eines-cyber-reasoning-systems-fur-die-aixcc https://cfp.cccv.de/39c3/talk/UNNRYM/ https://cfp.cccv.de/39c3/talk/UNNRYM/feedback/ false 2025-12-29T23:00:00+01:00 23:00 00:50 Sendezentrum Bühne (Saal X 07) 39c3-how-to-grow-weed-101-2-years-of-applyed-failure-d de, en other How to grow Weed 101, just use your command LLM Overloard to translate if you dont just want to come by and have a hear :D oo00oo https://events.ccc.de/congress/2025/hub/event/detail/how-to-grow-weed-101-2-years-of-applyed-failure-d false 2025-12-29T13:45:00+01:00 13:45 00:45 Sendezentrum Bühne (Saal X 07) 39c3-zellkultur de Live-Podcast Bühne Ich bin ja glaube ich reichlich spät, aber da Moepern endlich wieder zum Congress kommt und ich das erst vor kurzem erfahren habe, dachte ich, ich werfe unseren Namen mal in den Hut. Wir sind/waren ein Biologie-Podcast und durch Babypause bei Moepern ist der etwas eingeschlafen. Schaffen wir ein Revival? Verratet ihr's uns. Wir nehmen auch den Podcast-Tisch wenns sonst nicht passt. :) In der Zellkultur reden Claudia (moepern) und Anna (Adora Belle) über das Leben, die Biologie und den ganzen Rest. Am liebsten schauen wir tief in die Zelle, auf die DNA und schauen Viren bei der Arbeit zu. Wir besprechen aktuelle Themen - aber wollen auch Grundlagenwissen vermitteln. Ihr seid außerdem eingeladen, eure Fragen zu stellen. Ob live oder per Zusendung. :) Und in einer aktuellen Bio-Frage klären wir Biologie-Mythen auf! https://pretalx.c3voc.de/media/39c3-sendezentrum/submissions/JQLXXM/4_xDq1v22.png Adora Belle https://events.ccc.de/congress/2025/hub/event/detail/zellkultur https://pretalx.c3voc.de/39c3-sendezentrum/talk/JQLXXM/ https://pretalx.c3voc.de/39c3-sendezentrum/talk/JQLXXM/feedback/ false 2025-12-29T14:45:00+01:00 14:45 00:45 Sendezentrum Bühne (Saal X 07) 39c3-omnibus-halbgarer-machenschaften-ohm-23 de Live-Podcast Bühne erdgeist & monoxyd denken laut. Aufgrund des großen Erfolgs soll das jetzt auch beim Congress versucht werden. Themen? Ja! Wahrscheinlich irgendwas mit so... Dingen, die gerade passiert sind und zu denen mal was gesagt werden muss. Besser wir als Lanz & Precht! Es gibt außerdem einen besonderen Anlass: 23! (Wo kommt das eigentlich her?) https://pretalx.c3voc.de/media/39c3-sendezentrum/submissions/DE89ZU/ohm_NYXeNWS.png monoxyd erdgeist https://events.ccc.de/congress/2025/hub/event/detail/omnibus-halbgarer-machenschaften-ohm-23 https://pretalx.c3voc.de/39c3-sendezentrum/talk/DE89ZU/ https://pretalx.c3voc.de/39c3-sendezentrum/talk/DE89ZU/feedback/ false 2025-12-29T16:00:00+01:00 16:00 01:30 Sendezentrum Bühne (Saal X 07) 39c3-och-menno-x-disconnected-unexpected-elbonian-incident-response-wie-reagiere-ich-falsch de Live-Podcast Bühne (lang) Jeder redet darüber wie man eine Krise optimal bearbeitet. Bei Disconnected Unexpected geht es ja darum das das Publikum ein Szenario in den Raum wirft und Teams versuchen eine optimale Lösung zu finden. Bei Och Menno geht es darum das Sachen schief gehen. In der großen Nation Elbonien geht es darum das immer die komplizierteste, gerechtfertigte Lösung findet die garantiert die schlechteste Auswirkungen hat. Es wird eine Impro Comedy Show, wo das Publikum ein Szenario in den Raum werfen darf, und das Panel versucht die Krise durch wohlgemeinte Ideen schlechter zu machen. Sven Uckermann egouvernante Runtanplan https://events.ccc.de/congress/2025/hub/event/detail/och-menno-x-disconnected-unexpected-elbonian-incident-response-wie-reagiere-ich-falsch https://pretalx.c3voc.de/39c3-sendezentrum/talk/8G7TUG/ https://pretalx.c3voc.de/39c3-sendezentrum/talk/8G7TUG/feedback/ false 2025-12-29T18:45:00+01:00 18:45 01:30 Sendezentrum Bühne (Saal X 07) 39c3-wisspod-jahresrckblick-2025-oder-ki-in-der-wissenschaft de Live-Podcast Bühne (lang) Wie die letzten Jahre gute Tradition geworden ist, blicken Melanie Bartos und Bernd Rupp zurück auf das wissenschaftspodcasts.de-Jahr 2025 und sprechen über die Perspektiven, die sich für das Wissenschaftspodcast-Jahr 2026 abzeichnen. Dabei beleuchten wir die Herausforderungen bei der Kuration, die Anmeldezahlen neuer Wissenschaftspodcasts, die Weiterentwicklung der Website sowie den Aufbau und die Betreuung der WissPod-Community. Diese umfasst inzwischen rund 420 Wissenschaftspodcasts mit insgesamt über 33.000 Episoden. 2025 wurde erstmalig ein Podcast-Adventskalender mit 24 kuratierten Spezial-Podcast-Episoden aufgesetzt. Wie die letzten Jahre reden wir aber auch über ein Thema, das die Wissenschaft aber auch die Wissensvermittlung oder Wissenschaftskommunikation beeinflusst. Dieses Jahr geht es dabei um KI in der Wissenschaft. Wir blicken auf Chancen und Risiken: In der individuellen Perspektive der einzelnen Wissenschaftler*innen ergeben sich oft große Möglichkeiten zur Beschleunigung der eigenen Arbeit. Dabei geht man aber leicht eine Beziehung mit großen Tech-Konzernen mit unklaren Interessen und Zielen ein. Daraus ergibt sich der Bedarf einer Wahrheitsschutz-Gesamtrechnung für eine Wissenschaft in der KI flächendeckend eingesetzt wird. Mit unseren Gästen sprechen wir über Podcasts in der Wissen{schaft}skommunikation, über Ziele und Kriterien – und darüber wie KI die Wissenschaft verändert. https://pretalx.c3voc.de/media/39c3-sendezentrum/submissions/LGYBLJ/logo-wisspod-dunkel_s0nNNRr.png Bernd Rupp Melanie Bartos https://events.ccc.de/congress/2025/hub/event/detail/wisspod-jahresrckblick-2025-oder-ki-in-der-wissenschaft https://pretalx.c3voc.de/39c3-sendezentrum/talk/LGYBLJ/ https://pretalx.c3voc.de/39c3-sendezentrum/talk/LGYBLJ/feedback/ false 2025-12-29T20:30:00+01:00 20:30 01:30 Sendezentrum Bühne (Saal X 07) 39c3-denkangebot-rainer-mhlhoff-ber-ki-und-autoritre-sehnschte-im-silicon-valley de Live-Podcast Bühne (lang) Der Hype um künstliche Intelligenz ist allgegenwärtig. Selbst Donald Trump postet KI-generierte Videos, in denen er sich wahlweise als Rockstar oder Kampfjetpilot inszeniert. Elon Musk prahlte öffentlich damit, dass in seinem "Department of Goverment Efficiency" der soziale Kahlschlag mit Unterstützung Künstlicher Intelligenz vorangetrieben wird. Und Peter Thiel meint allen ernstes, KI-Regulierung und das Erscheinen des Antichristen gingen Hand in Hand. Müssen wir uns Sorgen machen? Rainer Mühlhoff ist Professor für Ethik und kritische Theorien der Künstlichen Intelligenz an der Universität Osnabrück. In seinem kürzlich erschienen Buch "Künstliche Intelligenz und der neue Faschismus" setzt er sich kritisch mit dem KI-Hype auseinander. Und er erklärt, welche toxischen Ideologien zentraler Akteure aus dem Silicon Valley Menschen empfänglich für autoritäre Gesellschaftsbilder machen. Wir sprechen über die Zyklen von KI-Hypes, das problematische Narrativ vom "Bürokratieabbau durch AI" und die Funktion apokalyptischer Zukunftsvisionen. Vor allem aber will ich von Rainer wissen: Welche Bedeutung haben bei dieser Debatte die in Teilen des Silicon Valley einflussreichen ideologischen Strömungen – von radikalem Cyberlibertarismus über Longtermismus bis hin zum "Dark Enlightment"? https://pretalx.c3voc.de/media/39c3-sendezentrum/submissions/KCVEJK/denkangebot_cover_3000px_9IwopQx.jpg Katharina Nocun https://events.ccc.de/congress/2025/hub/event/detail/denkangebot-rainer-mhlhoff-ber-ki-und-autoritre-sehnschte-im-silicon-valley https://pretalx.c3voc.de/39c3-sendezentrum/talk/KCVEJK/ https://pretalx.c3voc.de/39c3-sendezentrum/talk/KCVEJK/feedback/ false 2025-12-29T14:30:00+01:00 14:30 01:00 Am Spätverkauf 39c3-von-berlin-ins-exil-lieder-der-20er-und-30er-jahre de Live Performance live performance Kurt Tucholsky, Bertolt Brecht, Friedrich Hollaender, Claire Waldoff: Sie alle waren feste Größen des Berliner Kulturlebens. Es war wild, es war queer, es war jüdisch. Dann kamen die Nationalsozialisten an die Macht. Wer anders dachte – und sang! – wurde systematisch aus dem Land getrieben. Wer konnte, flüchtete ins ungewisse Exil. Die Schauspielerin und Politikerin Anne Helm singt eine Hommage an die Musiker*innen einer Zeit, in der politische Songs zum Ort der inneren Freiheit wurden. In ihrem Programm spannt sie den Bogen von beschwingten Kabarettsongs der Weimarer Zeit über antifaschistische Widerstandslieder, bis hin zu Hanns Eislers wehmütigen Worten über Exil und Heimweh. Begleitet wird sie dabei von Marcel Weller an der Gitarre. Durch ihre direkte und schlichte Interpretation, schenken die beiden den Liedern eine große Aktualität und Nahbarkeit. https://cfp.cccv.de/media/39c3-call-for-punk/submissions/NGLREC/464765669_572347508813897__iLdt911.jpg https://events.ccc.de/congress/2025/hub/event/detail/von-berlin-ins-exil-lieder-der-20er-und-30er-jahre https://cfp.cccv.de/39c3-call-for-punk/talk/NGLREC/ true 2025-12-29T16:30:00+01:00 16:30 00:15 Am Spätverkauf 39c3-tech-coops-qa en Antifa Lightning Talk In the tech-coops we are several tech collectives sharing the same values. In the Q&A we want to talk a bit how wie organise our work and what we do in our collectives. Come by and have a chat with us :) https://tech-coops.de/ Carla https://events.ccc.de/congress/2025/hub/event/detail/tech-coops-qa https://cfp.cccv.de/39c3-call-for-punk/talk/7QLMZ7/ true 2025-12-29T19:00:00+01:00 19:00 00:30 Am Spätverkauf 39c3-coffeebots-cornern-congress de live performance Die Coffeebots hängen am Späti ab und spielen ihre Lieblingslieder The Coffeebots hang out at the Säti and play their favourite songs Die Coffeebots, eine Gruppe Marionetten aus Altmetall bringen ihre Instrumente mit nach Hamburg um stilvoll am Späti ein paar Songs zum besten zu geben. Und das Publikum darf natürlich mitsingen! The Coffeebots, a marionette theatre troupe made from scrapmetal come to Hamburg and bring their instruments to play a few songs at the Späti. And the audience is welcome to sing along! https://cfp.cccv.de/media/39c3-call-for-punk/submissions/UV9J9A/Coffeebots-on-stage_nyD01e9.png e-punc https://events.ccc.de/congress/2025/hub/event/detail/coffeebots-cornern-congress https://cfp.cccv.de/39c3-call-for-punk/talk/UV9J9A/ true 2025-12-29T21:00:00+01:00 21:00 00:30 Am Spätverkauf 39c3-der-untergang de Live Performance live performance Späti Punk Karaoke Special mit Der Untergang* Wir sind der Untergang*. Wir sind Julia Wilton (Das Bierbeben, Pop Tarts) und Thies Mynther (Das Bierbeben, Superpunk, Phantom Ghost, Chaos Communication Choir). Wir werden ein kleines Konzert spielen, tragen aber auch gern etwas zum sehr guten Punk Karaoke bei. Zum Mitsingen und Mikrophonhijacking wird unbedingt eingeladen. Eventuell schaut auch der Chaos Communication Choir dabei. Späti Punk Karaoke Special mit Der Untergang* Wir sind der Untergang*. Wir setzen musikalisch um und teilen, wie wir uns angesichts der aktuellen weltpolitischen und gesellschaftlichen Geschehnisse fühlen. In einer Zeit zunehmender gesellschaftlicher Polarisierung und weltpolitischen Wahnsinns versteht sich Der Untergang* als künstlerische Stimme des Widerstands gegen faschistische Tendenzen, patriarchalischen Backlash, akzelerationistischen Autoritarismus und die Auswüchse eines entfesselten Kapitalismus, der die sozialen und ökologischen Grundlagen der Menschheit gefährdet. Unsere elektronischen Kompositionen wie “Adenauer ist ein Bus” und “Nichts als Krach” bilden die Grundlage für deutschsprachige Texte, die sowohl poetisch als auch direkt politische Botschaften transportieren. Wir sind Julia Wilton (Das Bierbeben, Pop Tarts) und Thies Mynther (Das Bierbeben, Superpunk, Phantom Ghost, Chaos Communication Choir). Angeschlossene Mitglieder unserer Initiative sind DJ und Producerlegende Tobi Neumann am Modularsvsten und der auch sehr gute Sonawriter und Multi-Instrumentalist Yunus als Bratschist. Wir haben zwei Songs hier für Euch ins Wiki gestellt. Noten findet ihr hier, wenn ihr wollt: https://www.ccchoir.de https://cfp.cccv.de/media/39c3-call-for-punk/submissions/FBGWG8/Der_Untergang_logo_MaNwsW_KpyJwaT.webp Der Untergang* https://events.ccc.de/congress/2025/hub/event/detail/der-untergang https://cfp.cccv.de/39c3-call-for-punk/talk/FBGWG8/ Adenauer Srp Die Verhältnisse true 2025-12-29T22:00:00+01:00 22:00 00:30 Am Spätverkauf 39c3-inpunkto de Live Performance live performance Schrammelpunk aus Hamburg InPunkto ist eine vierköpfige Punkband aus Hamburg. Angefangen hat alles vor über zehn Jahren im Proberaum der TUHH als spontane Idee. Nach einigen Wechseln in der Anfangszeit stehen wir seit Jahren in fester Besetzung auf der Bühne. Unsere Songs sind mal ernst, mal humorvoll, aber immer direkt. Wer Perfektion sucht, ist hier falsch, aber Energie und gute Laune bringen wir mit. https://cfp.cccv.de/media/39c3-call-for-punk/submissions/SJUNJC/1000052358_0TSOzZW_5GOAIwW.webp Takakalle https://events.ccc.de/congress/2025/hub/event/detail/inpunkto https://cfp.cccv.de/39c3-call-for-punk/talk/SJUNJC/ true 2025-12-29T23:00:00+01:00 23:00 00:30 Am Spätverkauf 39c3-steuerkarten-fur-freunde-post-punk-experimental-sp en Live Performance live performance Minimal bis Post-Punk Cringe aus dem Bedroom. Endlich mal wieder aus sich heraus- und einander näher kommen. Für die Friends von den Friends mit guten Texten, meistens Punk, manchmal sanft, aber Hauptsache Spaß. Wir, Jona, Fen und Bille, haben uns im Sommer gefunden und plötzlich ist genug entstanden um die Musik auch teilen zu wollen, weil die Texte von uns handeln und, weil es raus muss in die Welt. Shy, chaotisch, solidarisch, hypnotisierend, fragend, wütend - Es geht um das Nein-Sagen im Spätkapitalismus, wie man trauert wenn man Gewalt erfahren hat, queer desires und was an Leonard eigentlich so besonders ist. Punk, Spoken Word, noisige Flächen, deutsche und englische Texte. Setlist: Nein Victims Was ist denn an Leonard so besonders Baby Hairpin Turns Steuerkarten für Freunde https://events.ccc.de/congress/2025/hub/event/detail/steuerkarten-fur-freunde-post-punk-experimental-sp https://cfp.cccv.de/39c3-call-for-punk/talk/TSKVKW/ true 2025-12-29T18:00:00+01:00 18:00 01:00 Chaos Computer Music Club 39c3-the-modular-workshop-the-tunegirl-und-rob-strobe de Music Workshop Hallo CCC Community, wir präsentieren euch The Tunegirl und Rob StrobE, beide sind mit Veröffentlichungen auf dem Assassins Soldier Label beheimatet und blicken auf eine gemeinsame Liebe für Detroit Techno. Die Idee zum gemeinsamen Workshop für euch entstand natürlich auf dem Dancefloor und The Tunegirl hat die Cases gepackt und nach Hamburg gebracht. Während The Tunegirl den praktischen Teil verantwortet und die Kabel steckt, wird euch Rob durch die Kabel führen und einen Einblick in die Welt der Module und Drummachines geben. Unterstützt wird das ganze von einer Kamera, damit ihr nah am Geschehen dabei sein könnt. Die beiden stehen euch für Fragen nach dem Workshop zur Verfügung. Wir wünschen euch viel Spass und gute Unterhaltung, Ablauf des Workshops 1. Begrüßung & Einführung • Vorstellung der Artists • Motivation und Ziel des Workshops • Kurzer Überblick über Setup & Equipment 2. Theorie & Orientierung im Kabeldschungel mit The Tunegirl & Rob StrobE • Was passiert eigentlich im Patch? • Überblick über Module, Signale, Clocking & Drummachines • Sounddesign-Strategien und Workflow-Tipps 3. Praxis: Live Modular Patchen mit The Tunegirl • Patchen in Echtzeit • Aufbau und Struktur eines modularen Livesets • Entstehung von Rhythmus, Sequenzen und Texturen • Abschließend Live-Jam 4. Visual Support • eine Kamera für den direkten Einblick ins Patch-Setup 5. Q&A – Eure Fragen, unsere Antworten Minuten • Offene Fragerunde • Austausch & Networking ________________________________________ Zielgruppe • Einsteiger bis Fortgeschrittene • Interessierte an modularer Klangerzeugung, Hardware-Livesets & -Musikproduktion ________________________________________ Hinweis Nach dem Workshop stehen wir euch gerne für persönliche Fragen, Austausch und Nerd-Talk zur Verfügung. ________________________________________ Wir wünschen viel Spaß, Inspiration & gute Unterhaltung! Andrea (The Tunegirl) & Rob (Rob StrobE) https://cfp.cccv.de/media/39c3-chaos-computer-music-club/submissions/XHULRU/_DSC8128_txZz_Zxssx7n.webp Rob StrobE https://events.ccc.de/congress/2025/hub/event/detail/the-modular-workshop-the-tunegirl-und-rob-strobe https://cfp.cccv.de/39c3-chaos-computer-music-club/talk/XHULRU/ true 2025-12-29T19:00:00+01:00 19:00 02:00 Chaos Computer Music Club 39c3-ninsn de DJ-Set DJ Set Soundcloud: https://soundcloud.com/ninsnberlin Ninsn has been active in Berlin's club and festival scene for over nine years. She moved to Berlin over 11 years ago and hasn't regretted it for a second. For many years, she has been involved in collectives and Disko Babel e. V. – from event planning and stage construction to DJing, which she has been actively pursuing for six years. Ninsn is a member of jonny knüppel and the Kopfüber Kollektiv. Musically, she moves between trippy minimal house and rich tech house. In her sets, powerful, deep bass meets a house atmosphere – never below 130 bpm. In addition, her heart beats for hypnotic techno, garage, breakbeats, hip-hop, ambient, acoustic music and punk rock, among other things. And she actually believes that there is good music to be found in every genre. https://cfp.cccv.de/media/39c3-chaos-computer-music-club/submissions/RH7KUV/Ninsn_Shoot_I_YZ2lTZM.webp Nina https://events.ccc.de/congress/2025/hub/event/detail/ninsn https://cfp.cccv.de/39c3-chaos-computer-music-club/talk/RH7KUV/ true 2025-12-29T21:00:00+01:00 21:00 01:00 Chaos Computer Music Club 39c3-denise-frey-electro-acoustic-ambient-music de Live Performance live performance Denise Frey macht elektroakustische Ambient-Musik – ruhig, vielschichtig, atmosphärisch. Mit Saxophon, MPC, Effektgeräten und einem feinen Gespür für Klang formt sie in ihren Konzerten Klanglandschaften, die einladen zum Loslassen, Lauschen, Entspannen. Ihre Musik entsteht live – improvisiert, organisch, unmittelbar. Schon als Kind war Musik für sie ein innerer Antrieb. Mit sechs begann sie am Keyboard, mit 13 kam das Saxophon – nur, weil ein Junge, den sie mochte, es spielte und sie genau so cool sein wollte. Sie blieb dabei. Erst wollte sie Schauspielerin werden, doch ein körperliches Handicap hinderte sie am Schauspiel – also studierte sie klassisches Saxophon. Nach Jahrzehnten intensiver Musikerfahrung, fand sie einen Weg zur freien Improvisation, zur elektronischen Musik – und schließlich zu sich selbst. „Ich habe nichts gefunden, was für mich mehr Sinn ergibt als Musik“, sagt sie. Musik war nie Plan, sondern Notwendigkeit – ein Mittel zur Selbstheilung, zur Verbindung, zum Ausdruck. In der elektronischen Produktion fand sie nicht nur neue Klänge, sondern auch Freiheit: „Ich wollte nie abhängig sein. Schon mit 16 war mir klar: Ich will eine Band sein – alleine.“ Heute steht sie allein auf der Bühne – und füllt den Raum mit Tiefe. Ihre Sets sind verspielt, meditativ, manchmal technoid – immer offen für das Unerwartete. Was zählt, ist die Erfahrung für sie und für ihr Publikum. „Ich habe immer eine gute Zeit, wenn ich spiele. Und ich wünsche mir, dass andere das auch haben – dass sie leichter rausgehen, als sie reingekommen sind.“ Denise Frey steht nicht da, um sich zu inszenieren. Ihre Haltung ist leise, aber klar. Es geht ihr um Echtheit. Um Berührung. Um einen Raum, in dem alles da sein darf. Wer ihre Konzerte besucht, erlebt Musik nicht als Performance, sondern als Einladung. Neben ihren Solokonzerten spielt sie im ND Duo mit Nico Petry (Drums & Elektronik) und unterrichtet Saxophon, Flöte, Improvisation und Musikproduktion. Ihre Musik ist so vielfältig wie ihr Publikum – und ihr Anliegen immer dasselbe: Verbindung schaffen. Mit sich selbst. Und mit anderen. https://cfp.cccv.de/media/39c3-chaos-computer-music-club/submissions/8V8DXX/Denise_4_KZw9TxA.jpeg Denise Frey https://events.ccc.de/congress/2025/hub/event/detail/denise-frey-electro-acoustic-ambient-music https://cfp.cccv.de/39c3-chaos-computer-music-club/talk/8V8DXX/ true 2025-12-29T22:00:00+01:00 22:00 01:00 Chaos Computer Music Club 39c3-tinabel-vs-nintendo-ds-chiptune-punk-and-new-wave- en Live Performance live performance Tinabel (Tina Belmont) plays a set of her punky electronic rock songs using "Rhythm Core Alpha 2", software which she created herself, on the Nintendo DSi & 3DS game consoles. See http://www.tinabelmont.com and http://www.whitecollarpunk.com to hear the music, or http://rhythmcorealpha.com to learn about the software! Tinabel (Tina Belmont) is the creator of "Rhythm Core Alpha 2", a music creation system for the Nintendo DSi and 3DS game consoles which was available in the Nintendo eShop until March 2023. She will play a blistering set of her own original music and 1980's covers. Yes, there are vocals. These songs are fast songs about dark subjects: burnout, secret shame, alienation, failed friendships, abandonment issues, etc. You'll dance and then say "Wait... what?!" While this is electronic, this is a punk show. Expect intensity. See http://www.tinabelmont.com and http://www.whitecollarpunk.com to hear the music, or http://rhythmcorealpha.com to learn about the software! https://cfp.cccv.de/media/39c3-chaos-computer-music-club/submissions/VPAQWU/TinaLiveAtX-Ha_Wk9yKha.PNG Tinabel https://events.ccc.de/congress/2025/hub/event/detail/tinabel-vs-nintendo-ds-chiptune-punk-and-new-wave- https://cfp.cccv.de/39c3-chaos-computer-music-club/talk/VPAQWU/ true 2025-12-29T23:00:00+01:00 23:00 02:00 Chaos Computer Music Club 39c3-wante-dj-set de DJ-Set DJ Set Wante (Cologne) is drawn to dark, tunnely sets. With a soft spot for long, atmospheric, break-driven intros, her carefully curated selections evolve into relentless, hypnotic techno with ambient soundscapes. deep (minimal) techno, ambient & dub techno. https://cfp.cccv.de/media/39c3-chaos-computer-music-club/submissions/Z7YUZD/wante-2_qMqVOUJ.png Wante https://events.ccc.de/congress/2025/hub/event/detail/wante-dj-set https://cfp.cccv.de/39c3-chaos-computer-music-club/talk/Z7YUZD/ true 2025-12-30T01:00:00+01:00 01:00 01:00 Chaos Computer Music Club 39c3-rob-strobe de DJ-Set DJ Set THE SECOND DECADE Born `78 in Germany Rob StrobE grew up and being influenced with classical music, swing and jazz in his childhood. He early discovered the likes of Depeche Mode, Michael Jackson, Kraftwerk and more early electronic music approaches. In his late youth/early adult life he frequently travelled to Frankfurt attending nights at the Omen. Those nights and weekends were filled with DJs like Sven Vaeth, Dj Rush, Chris Liebing, G-Man aka Gez Varley, Hardfloor and so many more, celebrating and transporting the spirit of those days! After the closing of the Omen in late 1998 he went on to clubs like u60311, Tanzhaus West, MTW and others and eventually started his career as professional (sound) technician and light jockey. Around the year 2002 he started music production - mostly for personal fun and recreational purposes - but some records and remixes have been released since then...some of this older work can still be found on his Soundcloud! Since then he developed his own company specialized on music studio technology, room acoustic, signal flow schemes and studio furniture. Meanwhile his own studio transformed from a small Home Studio to a „room-in-room“ environment in the Logic Haus - the former home of Harthouse, Eye-Q and Snap! If he had to describe his musical style and give it a name: it would be „DubHouseTechno with a pinch of Detroit" ;) FastFoward: Year 2021 - after a 7 year break of releasing music, Rob StrobE is back with releases on imprints like Lucidflow, ASrecords, Tantara, Motech and numerous others! Rob used the time to do a major swap from software based production over to the modular and hardware world and the output speaks for itself! Enjoy his music and come pass for a visit on his social media outlets and say „hello“! THANKS FOR YOUR SUPPORT!!! COLLABORATIONS with G-Man aka Gez Varley (Swim/Quo Vadis/UK) Bo_Irion (Conaisseur/FFM) APro (Audio Emissions/FFM) Voodoe (Audio Emissions/FFM) Frank Kusserow (Data Punk/WhiteNoise/FFM) Israel Toledo (ASRecords/Mexico) https://cfp.cccv.de/media/39c3-chaos-computer-music-club/submissions/VBJ7X9/A6330F24-62CA_FxBwxji.webp Rob StrobE https://events.ccc.de/congress/2025/hub/event/detail/rob-strobe https://cfp.cccv.de/39c3-chaos-computer-music-club/talk/VBJ7X9/ true 2025-12-30T02:00:00+01:00 02:00 01:00 Chaos Computer Music Club 39c3-jan-dalvik en Live Performance live performance Techno. Live. Modular. For more than three decades, Arno has been a defining force in the electronic music scene — a producer, sound designer, and passionate explorer of analog sound. After numerous successful collaborations with a wide range of artists, Mueller emerged in 2017 under his pseudonym Jan Dalvík, stepping into the spotlight as a solo artist. Renowned for his distinctive analog sound design, Dalvík’s music stands out through groovy, hypnotic, and impulsive beats that bridge the gap between emotion and energy. As a DJ, live act, and producer, he seamlessly moves across a broad spectrum of electronic styles — from ambient and downbeat to deep, driving techno. Whether performing solo or engaging in live modular techno jams with artists such as Daniel Miller (Mute Records) or Tino Machauer (Shockwerk, Klar Audio), Jan Dalvík continues to push the boundaries of electronic expression — always analog, always authentic. https://soundcloud.com/jandalvik/techno-set-dalvik-dez-24 https://jandalvik.com/ https://cfp.cccv.de/media/39c3-chaos-computer-music-club/submissions/N3AWXD/Dalvik_xJwmb9_iDeONvD.webp Jan Dalvik https://events.ccc.de/congress/2025/hub/event/detail/jan-dalvik https://cfp.cccv.de/39c3-chaos-computer-music-club/talk/N3AWXD/ true 2025-12-30T03:00:00+01:00 03:00 01:00 Chaos Computer Music Club 39c3-project-poltergeist en DJ-Set DJ Set Project Poltergeist Live [Hard Techno, Psytrance, Hard Dance] A formidable force in electronic music, Project Poltergeist has carved out a distinctive space in the hard electronic music scene. Specializing in a razor-sharp blend of harder electronic dance genres, this solo artist has become a pivotal act on the Chaos circuit. Known for delivering high-energy sets that push the boundaries of electronic sound, Project Poltergeist has earned a reputation as a must-see performer. His ability to seamlessly navigate between aggressive techno, driving Hardtrance and Psytrance rhythms has made him a standout act, consistently drawing massive crowds and becoming a highlight of major Chaos events. https://linktr.ee/projectpoltergeist https://cfp.cccv.de/media/39c3-chaos-computer-music-club/submissions/JTW7KR/Poltergeist_Lo_fhSsCvg.jpg Alexeyan https://events.ccc.de/congress/2025/hub/event/detail/project-poltergeist https://cfp.cccv.de/39c3-chaos-computer-music-club/talk/JTW7KR/ true 2025-12-30T04:00:00+01:00 04:00 02:00 Chaos Computer Music Club 39c3-gwen-wayne de DJ-Set DJ Set Ey chill mal!!Nix da!!! Denn manche mögen's heiß, und manche mögen's nice.......und Shitstormtechno verliert NIE seine hotte credibility! Lass dich überraschen! N´abend Gwen Wayne's Shitstormtechno. Das genre hat sie selbst erfunden, cause she can. Musikalisch schwer einzuordnen, aber ordentlich dampf und bass hat jedes Set. Zwischen techhouse, UK Garage und Breaks ist für jeden was zum wackeln dabei. Und zum Schluss kann jeder sagen: "In my heart and in the Rest of my Brain, there will be always a Part of Gwen Wayne". https://cfp.cccv.de/media/39c3-chaos-computer-music-club/submissions/UFKXBZ/Gwen-09.11.25_ODxaQ66.webp Unnamed user https://events.ccc.de/congress/2025/hub/event/detail/gwen-wayne https://cfp.cccv.de/39c3-chaos-computer-music-club/talk/UFKXBZ/ Bild Gwen wayne option 2 true 2025-12-29T10:00:00+01:00 10:00 03:00 Chill Floor 39c3-flow-vi de DJ Set Dj Set Süße Frühstücke auf dem Plattenteller. https://cfp.cccv.de/media/39c3-chaos-computer-music-club/submissions/8E3AE9/Flow-Vi_CYBGl_sDfrcsD.webp Viv & Flo https://events.ccc.de/congress/2025/hub/event/detail/flow-vi https://cfp.cccv.de/39c3-chaos-computer-music-club/talk/8E3AE9/ true 2025-12-29T13:00:00+01:00 13:00 01:00 Chill Floor 39c3-der-feine-schliv de DJ-Set DJ Set Zwischen Rap, Tanz und Poesie, erschließt Der feine Schliv neue Räume. In ihren Performances changiert sie zwischen provokanten Auf-die-Fresse-Ansagen an das Patriarchat und empathischen Erzählungen vom Versuchen und Scheitern. Sie tritt unter anderem mit dem serbischen Nachwuchs Duo “Slezga” sowie mit den Hamburger Gruppen “Fallbeil” und “Yummy Air”auf. An der Diverstität ihrer Begleitungen zeichnet sich ihr musikalisches Universum ab, von balladigen Conscious Raps, Chansons und Witchy Toasting. https://cfp.cccv.de/media/39c3-chaos-computer-music-club/submissions/ADMKYW/photo_2025-12_LKsQWpE.jpeg Der feine Schliv https://events.ccc.de/congress/2025/hub/event/detail/der-feine-schliv https://cfp.cccv.de/39c3-chaos-computer-music-club/talk/ADMKYW/ true 2025-12-29T14:00:00+01:00 14:00 01:00 Chill Floor 39c3-betontes-schonen de DJ-Set DJ Set Dj Set Betontes Schonen mit Jeanette https://cfp.cccv.de/media/39c3-chaos-computer-music-club/submissions/UDYXQU/39c3_WhqdynM.gif Jeanette https://events.ccc.de/congress/2025/hub/event/detail/betontes-schonen https://cfp.cccv.de/39c3-chaos-computer-music-club/talk/UDYXQU/ true 2025-12-29T15:00:00+01:00 15:00 03:00 Chill Floor 39c3-der-verlangerte-reboot de DJ-Set DJ Set Der verlängerte Atem pres. Ghost Processes Seit 2020 sendet Der verlängerte Atem regelmäßig auf HALLO:Radio und tourt mit Gastauftritten auf Festivals und Veranstaltungen in und um Hamburg. Als offenes Radiolabor zwischen Musik, Redebeiträgen und thematisch passenden Audio-Snippets, verweben die Vinyl-DJs, Künstlerinnen und Radiomacherinnen Fiona Grassl, Jil Lahr und Martin Ramacher analoge Klänge, Stimmen und Gedanken zu thematischen Sendungen. Für den 39C3 fährt Der Verlängerte Atem das System herunter - und wieder hoch. Und findet dazwischen: Prozesse ohne Besitzer, Threads ohne Aufgaben, Routinen, die längst beendet sein sollten und doch weiterlaufen. Geisterprozesse flüstern im Hintergrund, aktualisieren sich selbst, verlieren den Takt oder schlafen zu tief, um je zurückzukehren. Zwischen knisterndem Vinyl, digitalem Summen, Glitches und verspielten Redebeiträgen entstehen live Sound-Landschaften, in denen nichts ganz verschwindet - und alles wiederkehrt. Spooky. https://soundcloud.com/derverlaengerteatem https://cfp.cccv.de/media/39c3-chaos-computer-music-club/submissions/T3HWVP/dva_39c3_sONV_3HA8u85.webp Martin Fiona Jil https://events.ccc.de/congress/2025/hub/event/detail/der-verlangerte-reboot https://cfp.cccv.de/39c3-chaos-computer-music-club/talk/T3HWVP/ true 2025-12-29T18:00:00+01:00 18:00 01:00 Chill Floor 39c3-cloud-management de Live Performance live performance Operating in a mode of Kluster via Pole, Dub Syndicate at Conny Plank's, or even fang-baring flashes of The Bug and Bryn Jones or Peak Oil modernism, the trio approach the project from the more oblique angles of respective projects Datashock, Phantom Horse and Love-Songs, to probe a more soft-centred, dematerialised and heady sound, but also reserve the right to go tuffer, more venomous, when they feel it. https://cfp.cccv.de/media/39c3-chaos-computer-music-club/submissions/GXW7N7/CM_Foto_fPwJk_8MzThk0.webp Cloud Management https://events.ccc.de/congress/2025/hub/event/detail/cloud-management https://cfp.cccv.de/39c3-chaos-computer-music-club/talk/GXW7N7/ true 2025-12-29T19:00:00+01:00 19:00 02:30 Chill Floor 39c3-kathadingsda en DJ-Set DJ Set kathadingsda vereint treibende Beats und sanfte Grooves mit dubbigen Elementen und experimentellen Klängen. So entstehen warme, organische Soundwelten, die sich stetig verändern und in Bewegung bleiben. https://cfp.cccv.de/media/39c3-chaos-computer-music-club/submissions/WHBNUK/avatar1836180_2Ug61ov.webp dingsda https://events.ccc.de/congress/2025/hub/event/detail/kathadingsda https://cfp.cccv.de/39c3-chaos-computer-music-club/talk/WHBNUK/ true 2025-12-29T21:30:00+01:00 21:30 01:00 Chill Floor 39c3-spontaneous-space-live de live performance Es spielen mit: Claas Ueberschär: Trompete Lennart Meyer: Bass Jan-Philipp Meyer: Drums Marta Winnitzki: Keys Free improvised Ambient-Jazz Marta https://events.ccc.de/congress/2025/hub/event/detail/spontaneous-space-live https://cfp.cccv.de/39c3-chaos-computer-music-club/talk/VYFESY/ true 2025-12-29T22:30:00+01:00 22:30 02:30 Chill Floor 39c3-little-miss-freedmans-relaxession en DJ Set Chaotic harmonious journey through music, language, sound, and text. Naama Freedman invites you to become a flâneur through her sonic stream of consciousness, including live reading, singing, movie clips, and music ranging different genres. Eindelijk meyhem. https://cfp.cccv.de/media/39c3-chaos-computer-music-club/submissions/7AJVHX/Messenger_cre_ZkqSC08.webp Naama https://events.ccc.de/congress/2025/hub/event/detail/little-miss-freedmans-relaxession https://cfp.cccv.de/39c3-chaos-computer-music-club/talk/7AJVHX/ true 2025-12-30T01:00:00+01:00 01:00 02:00 Chill Floor 39c3-nixe de DJ-Set DJ Set Dj Set Nɨxe moves quietly beneath the surface of the German underground. She has been part of Berlin’s slow sound since its early waves, shaping downtempo spaces with a calm and steady presence. Her sets drift between pulse and atmosphere, guided by a deep intuition for timing and tone. To hear Nɨxe play is to follow a subtle current. She doesn’t push or perform. She invites, leads, and lets the music do the rest. Her sound has travelled across continents, yet always returns to something essential: classy grooves that breathe, rhythms that open space, and a gentle pull toward introspection. It’s all held together by a distinct sensitivity to mood and movement — one that doesn’t ask for attention, but quietly earns it. Beneath it all, there’s a soft devotion to acid lines and psychedelic textures. Subtle. Never loud. Always felt. https://cfp.cccv.de/media/39c3-chaos-computer-music-club/submissions/77F8FV/Artist_Pic_Nix_Xq2vNRN.JPG Nixe https://events.ccc.de/congress/2025/hub/event/detail/nixe https://cfp.cccv.de/39c3-chaos-computer-music-club/talk/77F8FV/ true 2025-12-30T03:00:00+01:00 03:00 02:30 Chill Floor 39c3-jascha-hagen de DJ Set Dj-Set Jascha Hagen Dj-Set Jascha Hagen Jascha Hagen https://events.ccc.de/congress/2025/hub/event/detail/jascha-hagen https://cfp.cccv.de/39c3-chaos-computer-music-club/talk/M3YDTV/ true 2025-12-30T05:30:00+01:00 05:30 03:00 Chill Floor 39c3-wando-waiato-the-morellion de DJ Set For more than 35 years now, we are constantly digging crates for the most fulfilling music and sounds we barley can imagine. We spent thousands of nights with presenting the new findings to each other. Inexhaustible obsessed. For more than 35 years now, we are constantly digging crates for the most fulfilling music and sounds we barley can imagine. We spent thousands of nights with presenting the new findings to each other. Inexhaustible obsessed. https://cfp.cccv.de/media/39c3-chaos-computer-music-club/submissions/PSUWCW/IMG_0132_7t1v_UezQeAi.webp Wandowaiato https://events.ccc.de/congress/2025/hub/event/detail/wando-waiato-the-morellion https://cfp.cccv.de/39c3-chaos-computer-music-club/talk/PSUWCW/ true 2025-12-29T18:00:00+01:00 18:00 01:00 Vorglühmarkt 39c3-lisaholic-live-beatset en Live Performance live performance Lisaholic - breakbeat / bass / vocals liveloopset with a drum computer and a loopstation. www.lisaholic.com https://cfp.cccv.de/media/39c3-chaos-computer-music-club/submissions/8EERFK/IMG_6275_rGbF9tz.jpeg lisaholic https://events.ccc.de/congress/2025/hub/event/detail/lisaholic-live-beatset https://cfp.cccv.de/39c3-chaos-computer-music-club/talk/8EERFK/ true 2025-12-29T19:00:00+01:00 19:00 03:30 Vorglühmarkt 39c3-hollelang en DJ-Set DJ Set HolleLang has been supplying the dance floor with his ever evolving personal blend of Dub infected Techno, rooted both in House and flashing Rave music alike. A seasoned vinyl dj HolleLang does not overestimate the medium but focuses on the music and atmosphere. No punishing jockey from the dark side, his sets are known to vibrate with well wishing force and sometimes fierce intensity though while keeping a good sexy groove going. Former resident of well received "No f**ing Day Can Destroy My Love" party series, and long running host of Gumbo Frisst Schmidt/Nachtschleifer radio live broadcast on Hamburg‘s decades old independent station FSK, HolleLang unites both ceremonial dj talent and activist attitude to serve the community. He loves music so much, especially house music ❤️ Look at https://soundcloud.com/hollelang. HolleLang has been supplying the dance floor with his ever evolving personal blend of Dub infected Techno, rooted both in House and flashing Rave music alike. A seasoned vinyl dj HolleLang does not overestimate the medium but focuses on the music and atmosphere. No punishing jockey from the dark side, his sets are known to vibrate with well wishing force and sometimes fierce intensity though while keeping a good sexy groove going. Former resident of well received "No f**ing Day Can Destroy My Love" party series, and long running host of Gumbo Frisst Schmidt/Nachtschleifer radio live broadcast on Hamburg‘s decades old independent station FSK, HolleLang unites both ceremonial dj talent and activist attitude to serve the community. He loves music so much, especially house music ❤️ Look at https://soundcloud.com/hollelang. https://cfp.cccv.de/media/39c3-chaos-computer-music-club/submissions/BY3DJ7/gpppimfkliadlb_7R7VYcF.jpg HolleLang https://events.ccc.de/congress/2025/hub/event/detail/hollelang https://cfp.cccv.de/39c3-chaos-computer-music-club/talk/BY3DJ7/ true 2025-12-29T11:00:00+01:00 11:00 00:50 SoS Stage H 39c3-wie-wir-auf-den-hochsten-kirchturm-der-welt-stiege de other Am 2. Juli 2024 kletterten wir unangemeldet auf das Ulmer Münster und platzierten dort auf einem riesigen Banner die Frage „Wäre Jesus Klimaaktivist?“. Viele Kirchengemeinden in ganz Deutschland hängten daraufhin diese Frage selbst an ihre Kirchen und der Theologie-Professor Ruben Zimmermann schrieb ein Buch über diese theologische Frage. Die These: Jesus hat sich laut Bibel immer für die Menschen eingesetzt, die wenig hatten. Die Klimakrise ist langfristig die größte Bedrohung für viele dieser Menschen. Wir glauben, Jesus würde sich heute als Aktivist engagieren. So wie er auch schon damals im Tempel Protest gemacht hat, weil ihm die Kommerzialisierung nicht passte. Darum sollten sich Kirchengemeinden aus ihrem Glauben heraus für Klimagerechtigkeit und die Bewahrung der Schöpfung einsetzen. 🧮 Samuel_77 https://events.ccc.de/congress/2025/hub/event/detail/wie-wir-auf-den-hochsten-kirchturm-der-welt-stiege true 2025-12-29T12:00:00+01:00 12:00 00:25 SoS Stage H 39c3-repressions-and-surveillance-of-pro-palestine-spee en other Over the last two years, Germany has engaged in systematic repression of Pro-Palestine speech within its borders, including home raids for online speech, border interrogations and device searches, spurious criminal charges, and arrests at protests for speech acts - often accompanied by disproportionate use of force. Social media monitoring, as well as video surveillance of association and expression at protests play an important and ongoing role, that becomes more problematic with the passage of Berlin's updated policing law providing for longer administrative detention, geofence warrants, and the expanded use of facial recognition in public spaces. In this talk we briefly summarize events occurring in Berlin and Frankfurt over the last two years as they pertain to digital surveillance and repression. Amnesty and Civicus Monitor have spoken out about Germany's repressions in this area, and the latter has downgraded its rating for Freedom of Expression accordingly. Come to find out what you can do to help push back against unconstitutional repressions of speech in Germany, and the role that NGOs and people with technical skills can play. t3 https://events.ccc.de/congress/2025/hub/event/detail/repressions-and-surveillance-of-pro-palestine-spee true 2025-12-29T12:30:00+01:00 12:30 00:50 SoS Stage H 39c3-die-waffen-nieder-im-westen-nichts-neues-runaround de, en other In 1889, peace activist and pioneer of international peace work Berta von Suttner published the novel ‘Lay Down Your Arms' in what was then the Austro-Hungarian Empire. In 1929, Erich Maria Remarque published his work ‘All Quiet on the Western Front' in Germany during the Weimar Republic. Both remain important works of anti-war literature to this day. In 1942, Isaac Asimov wrote in ‘Runaround’ in the fictional handbook for robotics: "1. A robot may not injure a human being or, through inaction, allow a human being to come to harm. 2. A robot must obey the orders given to it by human beings except where such orders would conflict with the First Law. 3. A robot must protect its own existence as long as such protection does not conflict with the First or Second Law." Are you familiar with any of these works? All of them? Others? What aspects of them are still relevant today? What can contemporary peace activism learn from them? Where is an update needed? What does peace activism look like when it incorporates modern machines, AI and the digital sphere? What works and initiatives do you know of that emerged after the Second World War and have had an impact on you? In this session, I would like to invite you to join me in thinking about how we can stand up for peaceful conflict resolution and work for peace in our various professional disciplines and spheres of life in 2026+ in the face of ongoing warmongering and armament. What does your current peace practice look like? What examples of successful peace initiatives or anti-war art do you know? What is the current state of the transnational (and digitally connected) peace movement? And: How do we protect ourselves and others from repression and attacks by divisive forces and warmongers? For several years now, I have been working intensively on the topic of peace and have designed a seminar on this topic this summer, from which I am happy to contribute preliminary work and insights to this session, if you are interested: https://www.udk-berlin.de/studium/studium-generale/lehrveranstaltungen-des-studium-generale/archiv-der-lehrveranstaltungen-des-studium-generale/archiv-sommersemester-2025/seminare-kulturwissenschaft-sose-2025/ peace-art-and-you-on-the-aesthetics-didactics-and-pedagogy-of-cultures-of-peace/ Lay Down Your Arms! Translated with DeepL.com (free version) Tomate_aka_Radikale_Liebe https://events.ccc.de/congress/2025/hub/event/detail/die-waffen-nieder-im-westen-nichts-neues-runaround true 2025-12-29T13:30:00+01:00 13:30 00:50 SoS Stage H 39c3-kein-palantir-bw de other Wir erzählen euch wie Palantir in Baden-Württemberg Fuß fasste, wie wir versuchten dagegen vorzugehen und was ihr daraus lernen könnt. Leibi NaN (he/him) https://events.ccc.de/congress/2025/hub/event/detail/kein-palantir-bw true 2025-12-29T14:30:00+01:00 14:30 01:20 SoS Stage H 39c3-anarchismus-heute other tbd Tomate_aka_Radikale_Liebe https://events.ccc.de/congress/2025/hub/event/detail/anarchismus-heute true 2025-12-29T16:00:00+01:00 16:00 00:25 SoS Stage H 39c3-uprising-in-belarus-revisted-5-years-later-0 other Talk with ABC Belarus It’s been 5 years since people in Belarus rose up against dictatorship of Alexander Lukashenko and for months tried to get rid of authoritarian regime through peaceful demonstrations, direct actions, strikes and acts of sabotage. The world has changed radically since that uprising with situation in Belarus becoming even more precarious since russia’s full scale invasion of Ukraine. At this anniversary we are going to look into the past, talk about the reality of resistance against russian empire and what were the chances of success for people in Belarus in 2020 knowing all the plans of Putin at this point of history. The presentation expects you to have basic knowledge of political situation in Belarus/Russia/Ukraine. abcdd https://events.ccc.de/congress/2025/hub/event/detail/uprising-in-belarus-revisted-5-years-later-0 true 2025-12-29T16:30:00+01:00 16:30 00:25 SoS Stage H 39c3-uprising-in-belarus-revisted-5-years-later-2 other Talk with ABC Belarus It’s been 5 years since people in Belarus rose up against dictatorship of Alexander Lukashenko and for months tried to get rid of authoritarian regime through peaceful demonstrations, direct actions, strikes and acts of sabotage. The world has changed radically since that uprising with situation in Belarus becoming even more precarious since russia’s full scale invasion of Ukraine. At this anniversary we are going to look into the past, talk about the reality of resistance against russian empire and what were the chances of success for people in Belarus in 2020 knowing all the plans of Putin at this point of history. The presentation expects you to have basic knowledge of political situation in Belarus/Russia/Ukraine. abcdd https://events.ccc.de/congress/2025/hub/event/detail/uprising-in-belarus-revisted-5-years-later-2 true 2025-12-29T17:00:00+01:00 17:00 00:50 SoS Stage H 39c3-super-mario-odysseydecomp-a-tale-about-decompiling en other An overview of learnings and best-of discoveries as well as impressive projects surrounding the reverse engineering and modding of Super Mario Odyssey. In more than four years of decompiling the game ([OdysseyDecomp](https://github.com/MonsterDruide1/OdysseyDecomp)), we have learnt about Nintendo's code practices and mistakes, some easter-eggs, and unused content. While a part of the community was busy taking the game apart, others focused on creating something new - in this talk, I show our decomp project along with a live demo of the workflow, some interesting easter eggs, unintended behaviour and interesting concepts in Nintendo's code, and finally some best-ofs and current state of the modding community. Reach out to me after the talk! Discord: [@monsterdruide1](https://events.ccc.de/congress/2025/hub/user/monsterdruide1) DECT: 5750 MonsterDruide1 https://events.ccc.de/congress/2025/hub/event/detail/super-mario-odysseydecomp-a-tale-about-decompiling true 2025-12-29T18:00:00+01:00 18:00 00:25 SoS Stage H 39c3-all-ctfers-and-pwners-welcome-pwndbg-meetup en other Meetup for discussing all things regarding the Pwndbg project (https://pwndbg.re/dev/) and its development, PWNing, binary exploitation and reverse engineering! Pwndbg is an open source tool for reverse engineering, exploit development and low level debugging which can be used with GDB and LLDB. We will host a presentation/demo of Pwndbg and its features - also - synchronization with decompiler of your choice (ida/binja/ghidra/angr). We may also talk some stuff about its development process. If the time allows, we will have a Q&A and discussion time. We welcome all users, newcommers, pwners and CTF players! Organized by Disconnect3d & k4lizen disconnect3d https://events.ccc.de/congress/2025/hub/event/detail/all-ctfers-and-pwners-welcome-pwndbg-meetup true 2025-12-29T18:30:00+01:00 18:30 00:25 SoS Stage H 39c3-freifunk de other Freifunk, was soll das? Ich soll mein Internet mit anderen teilen, wozu das denn? Wie geht das überhaupt? Wer braucht heutztage noch WLAN von anderen Leuten wenn doch eh alle Mobilfunkflatrates haben? All diese Fragen und weitere beantworten wir dir und haben sogar direkt noch freifunkfähige Router dabei, bei denen wir euch gern helfen diese für Freifunk einzurichten. Damit könnt ihr daheim direkt mitmachen. skorpy (she/her) https://events.ccc.de/congress/2025/hub/event/detail/freifunk true 2025-12-29T19:00:00+01:00 19:00 00:25 SoS Stage H 39c3-repression-gegen-antifaschistinnen-im-antifa-ost-u en other The number of house searches, surveillance, and intimidation methods used by Saxon authorities in particular, such as SOKO Linx, in recent years is simply immeasurable. We would like to give you an overview of the proceedings to date and those currently underway. What investigative methods does paragraph 129 allows? Who are the Nazis, anyway? And why is solidarity important when Trump wants to destroy “Antifa”? abcdd https://events.ccc.de/congress/2025/hub/event/detail/repression-gegen-antifaschistinnen-im-antifa-ost-u true 2025-12-29T19:30:00+01:00 19:30 00:50 SoS Stage H 39c3-where-do-all-the-leaks-go-openaleph-roundtable other Abstract: If you work involves sifting through and making sense of large amounts of data, we welcome you to a session on OpenAleph (openaleph.org), where we can brainstorm (and commiserate) together. We will show practical examples of surfacing interesting leads from leaked data and explore falsely-held beliefs that stand in the way of investigators. Making sense of a large volume of data is marketed as being a textbook use-case for generative AI. We beg to differ. Description: Making sense of large amounts of unstructured data makes users reach for prompting a chatbot. Newsrooms and organizations we work with hope to “ask questions” in a chat window, instead of searching through their data. But these same users rightfully demand accuracy and deterministic results. If they don’t find exactly what they are looking for, they doubt the efficiency of the entire software stack. Our experience, at the Data and Research Center (darc.li) with supporting research and investigations with algorithms and infrastructure led to insights about how to answer difficult questions in a deterministic way. This session will walk the audience through several features that surface names, companies, and other interesting data from large leaks. We will explore conundrums about search and deduplication features, which pose difficult questions for investigators and programmers. There are many falsehoods we tend to believe about our world. What is a name, actually? What constitutes a country, and who decides on that? How do you search for words across several languages, all at once? And how do you reveal hidden links in large volumes of data? All these will be answered without prompting a chatbot, not even once! catileptic (they/she) https://events.ccc.de/congress/2025/hub/event/detail/where-do-all-the-leaks-go-openaleph-roundtable true 2025-12-29T20:30:00+01:00 20:30 00:50 SoS Stage H 39c3-der-embedded-migrationspfad-purpose-ai-proofing-di de other Zielgruppe: Embedded Entwickler, Architekten, System-Ingenieure, die sich fragen: "Bringt meine Arbeit der Welt noch etwas, und habe ich morgen noch einen Job?" Besonders für High-End-Entwickler aus Legacy-Branchen (Automotive, Industrie, Luftfahrt). Format: Open-Space & Reverse Mentoring Diskussion (45 Minuten): Ein Austausch in zwei Teilen. Die Große These: Dein gut bezahlter Legacy-Job ist ein Goldener Käfig, dessen Opportunitätskosten exponentiell steigen. C-Legacy und veraltete Prozesse machen uns zu Low-Hanging-Fruit für die nächste Generation von Code-Copilots und AI-Automatisierung. Wir müssen uns neu positionieren und unsere Skills "AI-Proofen". Der Austausch: Dies ist ein Networking-Event für den Ausbruch. Wir suchen den direkten Austausch mit Leuten, die die Migration bereits erfolgreich geschafft haben (z. B. von Automotive zu MedTech, Startups, oder Open Source). Wir diskutieren: Welchen Purpose hat unser Wissen in nachhaltigeren Branchen? Welche Skills (abseits von C95) sind jetzt gefragt? Call to Action: Komm, teile deinen Schmerz und triff diejenigen, die ihren Karriere-Reset-Knopf schon gedrückt haben. kurisu https://events.ccc.de/congress/2025/hub/event/detail/der-embedded-migrationspfad-purpose-ai-proofing-di true 2025-12-29T21:30:00+01:00 21:30 00:50 SoS Stage H 39c3-ehds en, de other We will provide information about the EU regulation on the European Health Data Space (EHDS). The key provisions will come into force in 2027 and will then apply directly within all EU countries. EHDS says that all citizens will receive an electronic health record, which will be available EU-wide. Separately, all prescription data for medications will be available EU-wide. Access to pseudonymized health data will be permitted for very broadly defined research purposes. Individuals will have several opt-out possibilities available. How is civil society reacting? novider https://events.ccc.de/congress/2025/hub/event/detail/ehds true 2025-12-29T22:30:00+01:00 22:30 00:25 SoS Stage H 39c3-shitty-robot-battle de, en other Shitty Robot Battle! Please register at 39c3@shitty-robots.com! There ist also a Workshop ( https://events.ccc.de/congress/2025/hub/en/event/detail/shitty-robot-workshop ) but robots that were not build in the workshop are also welcome! We also needs volunteers as judges for the battle! Participants please come at Day 3 on10 p.m. to the shared table 22(Hall H) . Link to the Lightning talk : Link zum Lightning talk : https://media.ccc.de/v/39c3-lightning-talks-tag-3#t=6038 Neo https://events.ccc.de/congress/2025/hub/event/detail/shitty-robot-battle true 2025-12-29T23:00:00+01:00 23:00 01:20 SoS Stage H 39c3-emergente-systeme-nachhaltige-konflikte-warum-unse de other Most IT systems fail not because someone makes a mistake. They fail because no one understands the overall behavior. This SOS deals with emergent system effects: situations in which correctly built components together produce something that no one planned, modeled, or controlled. Using real-world examples from IT infrastructure, cloud dependencies, API designs, AI usage, update cascades, and financial and identity systems, we show how technical decisions can create lasting stress and conflict – often without a classic attacker, without an exploit, without a clear trigger. In line with the 39C3 motto “Power Cycles – Rethink, Reboot, Restart,” the session asks the question: What do we need to rethink before we restart? What can be rebooted – and what needs a fundamental rethink? The term “sustainable war” is understood not in a military sense, but in a systemic sense: - as a state of permanent repurposing, - overstretching, and creeping destabilization of IT systems, which - drives innovation, - undermines resilience, - and generates social side effects. Especially in times of global upheaval – geopolitical, technological, social – autonomy, dependencies, and resilience must be reevaluated. Not as buzzwords, but as concrete system properties. The session is aimed at: - Administrators, security engineers, CISOs - Architects, technical decision-makers - People from think tanks, regulation, and technology impact assessment Spock0010 (He/Him) https://events.ccc.de/congress/2025/hub/event/detail/emergente-systeme-nachhaltige-konflikte-warum-unse true 2025-12-30T00:30:00+01:00 00:30 00:25 SoS Stage H 39c3-lets-play-geoguessr en other We have a premium geoguessr subscription and some time, wanna join? We can do live challenges with up to 100 players so some team work may be required but we hope to see you there :3 All you need to participate is a device that can access the internet, winner(s) will get a (small) prize Otherwise unrelated to .meow besides the organisers, we just wanted to do something fun! dotmeow https://events.ccc.de/congress/2025/hub/event/detail/lets-play-geoguessr true 2025-12-30T01:00:00+01:00 01:00 01:20 SoS Stage H 39c3-tba other https://events.ccc.de/congress/2025/hub/event/detail/tba true 2025-12-29T11:00:00+01:00 11:00 00:50 SoS Lecture E 39c3-a-decentralized-social-layer-for-the-web-meeting-p en other There is a virtual world that we visit every day. It has billions of inhabitants and billions of places. But, whenever we go, there is nobody. Just the messages they left. We read our daily online newspapers while many are doing the same. We are browsing the same content - but we are still alone. If only we could see the other people browsing the same content at the same time. They might be interested in the same things right now. Imagine the real world without all the people on the streets. Streets and places, shops, cafés, libraries, deFV void of people. That's the Internet, the Web as it currently exists. Always has been like that and we got used to it. But we wanted more. We wanted social interactions. We got Social Networks and they turned into meme feeds and brain rot. That's not what we asked for. We asked for people, real people. And they are already there. What if we make them visible to each other? Then, ad-hoc communities can form directly at the content. Communities of like-minded people, interested in the same things. All we need is a federated social layer that cannot be owned, because it is decentralized as the Web itself. An infrastructure of some existing chat protocol in the spirit of the Fediverse or XMPP. A new way to communicate everywhere, not just in Social Media silos, not after giving up your profile. We want to talk to the people we meet wherever we go. We want to reclaim the Web. Here is how we do it Creating a decentralized social layer independent of Social Media silos. Wolfspelz https://events.ccc.de/congress/2025/hub/event/detail/a-decentralized-social-layer-for-the-web-meeting-p true 2025-12-29T12:00:00+01:00 12:00 00:50 SoS Lecture E 39c3-relationship-anarchy-and-technologies-of-conn_x57l en other Abstract: Relationship Anarchy is a guiding principle that hold the promise for us to prefigure the future. This session will start off by defining Relationship Anarchy. It will then nest this definition in the context of our current situation (socially, politically, technologically). Finally, we will look at technologies in a wider sense and investigate whether they are nurturing or hostile towards the prefiguration of Relationship Anarchy. Description: Relationship Anarchy is a form of livable anarchy. It follows in the steps of anarchy, in that it rejects illegitimate authority and nurtures personal and collective autonomy and agency. Livable anarchy opens up the public space for folx to participate actively in shaping how they wish to live and self-represent their desire and identity. It is rooted in solidarity and a respectful attitude towards otherness. In this talk, we explore the ways in which technology shapes our ability to practice Relationship Anarchy, as a form of livable anarchy. We start off by acknowledging that our use of technology shapes what we can do, perceive and imagine. In this sense, we can categorize technologies, in a broad sense, as either hostile towards Relationship Anarchy, or as nurturing towards it. The basis of this discussion is going to be a definition of Relationship Anarchy that catileptic, the speaker, offers in their writing: "Relationship Anarchy is honoring alterity while making one's self subject to others". This presentation is loosely based on this essay: https://catileptic.tech/posts/relationship-anarchy-technology/ . catileptic (they/she) https://events.ccc.de/congress/2025/hub/event/detail/relationship-anarchy-and-technologies-of-conn_x57l true 2025-12-29T13:00:00+01:00 13:00 01:20 SoS Lecture E 39c3-einfuhrung-embedded-rust-fur-workshop-hakkaa-_mlyg en, de other _Introduction to Embedded Rust on Microcontrollers and the [Hakkaa workshop task](https://events.ccc.de/congress/2025/hub/en/project/detail/assembly/hakkaa-board-smd-soldering-embedded-rust-for-begin/). This introduction is mostly aimed at beginner participants._ We'd like to give you an introduction to Rust on a microcontroller based on [Rust programming language: An absolute beginner workshop with intro presentation](https://events.ccc.de/congress/2025/hub/de/event/detail/rust-programming-language-an-absolute-beginner-wor). It aims to show you the little differences of this environment, presenting the workshop challenge and pointing you in the right direction for getting started. This session starts with a presentation of about 30 minutes in English and a round of questions for all. After that, our team supports you with your first self-paced steps. The initial part of the presentation covers using Rust on a microcontroller in general. The second part focuses on working with the Hakkaa board. If you've got a question after this session, you can find us at the Hakkaatachi assembly or in [our Matrix chat](https://matrix.to/#/#hakkaatachi-39c3:matrix.org). We recommend: * Having a soldered and tested [Hakkaa-Board](https://github.com/hakkaatachi/hakkaa-hardware) (whose kit you can get at the Hakkaatachi assembly) * Your laptop set up with the [development tooling](https://github.com/hakkaatachi/hakkaa-firmware?tab=readme-ov-file#setup) so that you can spend more time on programming than on installing * Your laptop fully charged References: * [Presentation Slides](https://christian-meusel.de/presentations/2025-39c3-embedded-rust-for-hakkaa-2/) sirhcel https://events.ccc.de/congress/2025/hub/event/detail/einfuhrung-embedded-rust-fur-workshop-hakkaa-_mlyg true 2025-12-29T14:30:00+01:00 14:30 01:25 SoS Lecture E 39c3-regiotreffen de other Regiotreffen auf dem 39c3. Das Treffen aller Regiovertreter*innen. gnom (sie,es / ihr) https://events.ccc.de/congress/2025/hub/event/detail/regiotreffen true 2025-12-29T16:00:00+01:00 16:00 01:20 SoS Lecture E 39c3-python-programming-for-absolute-beginners other (While this abstract is in English, this workshop will be held either in English or German; depending on who wants to participate!) Programming is not only a useful competency and oftentimes fun, but also a sort of “cultural technique” of our ever-expanding community. This workshop is intended as a first introduction to (Python) programming for absolute beginners. While C3 is traditionally a 'tech/hacker conference', more and more people without a programming background attend – as far as I'm concerned, this is awesome! While you certainly don't have to be a 'coder' to be a part of Congress (or to be a hacker), programming is still fun, wonderfully creative, and also an extremely valuable skill. Don't be afraid to give it a go! Of course, by the end of this 90-minute workshop, you will not be a programmer. You will, however, have attempted a deep dive into (Python) programming, learned some basics, and set yourself up for further learning (if you choose to do so). Furthermore, we will explore why it is still worthwhile to learn programming in a world that is seeing increased LLM usage – especially in the domain of software development. ## Target Audience and Required Previous Knowledge This is NOT a session for experienced developers who want to learn Python. This session is intended for beginners with little to no experience programming! Motivated children and young hackers are more than welcome, but it will be a stretch. No previous knowledge and/or technical expertise is required! ## Learning Objectives From a learning perspective, after the session, participants will be able to … * describe what programming essentially is about. * name and describe some basic programming terminology. * define requirements and design simple software. * model simple problems in terms of data structures and basic algorithms. * write basic scripts in Python in order to solve specific problems. * describe the role of LLMs in modern software development. ## About Me My Name is Ingo, and I am currently responsible for Digital Education and Educational Technology at the University of Cologne. Relevant to this session, I have a background in both education and computational linguistics. My love for Python stems from my work as a (computational) linguist and various projects I've been involved with. :) ## Format This session will be a 90-minute “code-along” workshop. We will be looking at some fundamental concepts in theory and, together, write some code. ## Technical Requirements If you want to participate actively (i.e., code along), you should bring a device that is capable of running a modern browser and has Internet access. Being able to type comfortably is also recommended ;). Alternatively, any device capable of running Python 3.10+ (ideally in a Jupyter Notebook) will do just fine! ## Material After the session, I will provide all materials, including some selected additional resources. All materials will also be provided via this page. The material, including the slides, is available via [GitHub](https://github.com/IngoKl/39c3-python-programming-for-absolute-beginners). Ps. This is a slightly updated version of the workshop(s) I gave at previous iterations of congress. IngoKleiber (er/sein) https://events.ccc.de/congress/2025/hub/event/detail/python-programming-for-absolute-beginners true 2025-12-29T17:30:00+01:00 17:30 00:50 SoS Lecture E 39c3-megastrukturen-und-galaktische-imperien-oder-wie-m de other Es geht um große Dinge: Dyson-Sphären und Imperien mit unzähligen Planeten. Wer ist mächtiger? die Föderation der Planeten, das Galaktische Imperium oder ein einzelnes voll ausgebautes Sonnensystem? Anfangs gibt es Raumstationen wie die ISS, dann rotierende Raumkolonien, irgendwann einen Ring um die Erde. Und eine Ringwelt um die Sonne ist erst der Anfang, wenn man eine Dyson-Sphäre bauen will. Der mögliche Weg von rotierenden Zylindern zur Kardashev II Zivilisation mit einer ganzen Sonne als Fusionsreaktor. Wie man das baut, was das dann bedeutet und ob man sowas überhaupt braucht. Spoiler: Dyson-Sphären werden unterschätzt. Sie sind größer als man denkt und vieles ist ganz anders, als man aus Science Fiction kennt. Eigentlich können wir mit heutiger Technologie schon einen Dyson-Schwarm bauen. Wir haben sogar schon angefangen. Es ist nur verdammt viel Arbeit für die Bots. Aber dann gibt es fast unendlich viel Lebensraum und noch mehr Compute-Leistung. Wolfspelz https://events.ccc.de/congress/2025/hub/event/detail/megastrukturen-und-galaktische-imperien-oder-wie-m true 2025-12-29T18:30:00+01:00 18:30 01:20 SoS Lecture E 39c3-alles-smart-und-save-oder-nur-schall-und-rauc_gz4c de other ‘New smoke detectors spy on tenants – and they have to pay for it’ was the headline in Stern magazine on 5 November 2024. The ‘smart’ smoke detectors referred to in the article have sensors that can detect fires and also measure ‘personal climate data’, transmitting it wirelessly [2, 3]. Consumer advocates have warned of infringements on personal rights [4, 5], and the topic has also sparked heated discussions within the community [6]. However, Techem claims that neither landlords nor they can determine which rooms someone is currently in. It is also not possible to track whether people are leaving the apartment or coming home” [3]. [3]. Workshop schedule: In about 10 to 15 minutes, we will introduce the topic of simple sensor data in the smart home. We will present examples of simple sensors from our research and explain how they were created using our sensor kit [7–9]. The second part is a joint 'data guessing game'. We will examine selected data traces that could have been generated by smart smoke detectors, such as the 'Multisensor Plus', and similar devices*, and attempt to collectively analyse the data and classify it. The final 20–25 minutes of the workshop will be reserved for reflection. How meaningful is simple sensor data from the home? What impact can this sensor data have on privacy? How should we deal with it? [1] https://www.stern.de/wirtschaft/immobilien/vonovia-skandal--neue-rauchmelder-spionieren-mieter-aus—35199846.html, accessed 9 July 2025. [2] https://www.vonovia.de/weitere-angebote/multisensor-plus – accessed 16 July 2025. [3] https://www.techem.com/de/de/geraete/multisensorplus-datenschutz — accessed 24 October 2025. [4] https://www.zeit.de/digital/datenschutz/2024-10/rauchmelder-vonovia-mieter-datenschutz-smart – accessed 16 July 2025. [5] https://www.swr.de/swraktuell/baden-wuerttemberg/ulm/mieter-wehren-sich-gegen-teure-rauchmelder-von-vonovia-100.html – accessed 16 July 2025. [6] https://chaos.social/@evawolfangel/113357161708038023 – accessed 24 October 2025. [7] https://doi.org/10.1109/CIVEMSA53371.2022.9853698 [8] https://doi.org/10.18420/muc2024-mci-ws17-153 [9] https://doi.org/10.18420/inf2024_65 * Average hourly temperature and humidity values per room (according to [3]). About us: Karola: I combine social, educational and technical perspectives, with a particular interest in hacking, the Internet of Things and digital education issues in the context of privacy and AI. Karola is active in the Chaos Computer Club Chemnitz. Albrecht: I develop, research and teach at the intersection of human-computer interaction and the Internet of Things. I focus on smart connected objects in everyday life and how people interact with them. I also consider the impact this has on their privacy. Simplications: Simplications researches the implications of supposedly simple sensor data in the home. It is a joint project of Chemnitz University of Technology, Anhalt University of Applied Sciences and the Saxony Consumer Advice Centre, as part of the programme 'Privacy Platform: Supporting citizens in exercising their fundamental right to informational self-determination”. Simplications is funded by the Federal Ministry of Research, Technology, and Space (FKZ 16KIS1868K). https://simplications.tucmi.de The workshop will be held mostly in German. Albrecht zazakalina (sie/she) https://events.ccc.de/congress/2025/hub/event/detail/alles-smart-und-save-oder-nur-schall-und-rauc_gz4c true 2025-12-29T20:00:00+01:00 20:00 01:20 SoS Lecture E 39c3-treffen-der-netzpolitischen-community-der-schweiz de other Nach dem Vortrag zur Netzpolitik in der Schweiz (Tag 3, Saal Fuse, 19:15) sind alle interessierten Personen eingeladen, die Diskussion in einer self-organized Session fortzusetzen. Es werden Aktivist:innen von verschiedenen Organisationen der Netzpolitik in der Schweiz anwesend sein. Kire https://events.ccc.de/congress/2025/hub/event/detail/treffen-der-netzpolitischen-community-der-schweiz true 2025-12-29T21:30:00+01:00 21:30 00:50 SoS Lecture E 39c3-2-jahre-bezahlkarte-2-jahre-widerstand-gegen-_kzuw de other How are Antifa-Ost, the war in Ukraine, Antifa = terrorist group, an American despot, and the bank accounts of German left-wing anti-repression structures connected? This fall, several political actors in Germany were affected. Among them were the anti-repression structures ABC Dresden and Rote Hilfe e.v: Our bank accounts were closed and several banks refused to open new ones. The reason? No official reason has been given to us so far. However, when we look at these events against the backdrop of the ongoing criminalization of anti-fascism and the classification of anti-fascists from Germany as terrorists by the US, a political motivation seems likely. This development is worrying and highlights the urgency of taking action against the ever-increasing shift to the right. After a brief update on the situation of affected groups and the political context in which debanking is taking place in Germany, we want to explore how we can respond to the current situation and develop a common perspective for action. Our goal: to make anti-repression structures capable of action again in the current times! Because we need them all more urgently than ever! We would like to discuss the following topics in groups: - Networking among GLS members / GLS cooperative - Alternative and decentralized payment options. Creating independence from banks? - Gathering information, bringing transparency to commercial lists (OFAK and Worldcheck) - Leverage and pressure options on Bafin/authorities. Which actors are involved? Who creates sanctions and terror lists? abcdd https://events.ccc.de/congress/2025/hub/event/detail/2-jahre-bezahlkarte-2-jahre-widerstand-gegen-_kzuw true 2025-12-29T22:30:00+01:00 22:30 00:50 SoS Lecture E 39c3-max8min-kurzfilm-short-film de, en other We will be watching around 50 minutes of selected short films that are a maximum of 8 minutes long. Many films are either without dialogue or, if necessary, have German subtitles. Do you know a good short film? Then send me the link – maybe there will be a next edition of Max8min 🎦 Birdy1976 https://events.ccc.de/congress/2025/hub/event/detail/max8min-kurzfilm-short-film true 2025-12-29T23:30:00+01:00 23:30 00:50 SoS Lecture E 39c3-tales-of-apartheid en, de other After yesterday we had way too many people not being able to hear us at the self organised session, we want to repeat it with a room and mics, giving everyone an oppurtunity to participate. I am palestinan with israeli citisinship and I lived about 30 years under the apartheid. With my is an activist who was in the westbank during 2022 to 2024, who next to his activism was collecting data for his university work, documenting the dynamics between settlers and the palestinans. faji https://events.ccc.de/congress/2025/hub/event/detail/tales-of-apartheid true 2025-12-30T00:30:00+01:00 00:30 00:25 SoS Lecture E 39c3-eigentum-was-soll-das de other Vorstellung einiger klassischer Gedanken zur Eigentumstheorie, insbesondere zur Rechtfertigung von Eigentum. Nach dem allgemeinen Teil kommen wir speziell auf geistiges Eigentum und Softwarerechte zu sprechen. simon123 https://events.ccc.de/congress/2025/hub/event/detail/eigentum-was-soll-das true 2025-12-30T01:00:00+01:00 01:00 00:50 SoS Lecture E 39c3-is-the-free-software-communist en other communist hackers, communist postartists and everyone interested in fighting fascism and imagining the world after capitalism are welcome to join our discussion. we are bringing our local revolutionary experience from Germany, Poland, Spain and LATAM lets discuss what's need to be done: - how to setup safe digital infrastructures in your communist org - systematic changes to unshit the tech and beyond - how to quit your bullshit job and move to better system - revolutionary potential of postart (based on Jerzy Ludwiński's theory) - communist approach to free software - anti-capitalist labor scheduling based on menstrual cycle jardi (He/him, they/them) https://events.ccc.de/congress/2025/hub/event/detail/is-the-free-software-communist true 2025-12-29T10:30:00+01:00 10:30 00:25 SoS Workshop D 39c3-lasst-uns-die-diskriminierung-von-neurodivergenten en, de other Society is not built for neurodivergent minds. Discrimination, exclusion, and institutional bullying are not individual misfortunes; they are systemic failures. I will share insights from my own journey and the practical tools I’ve developed to fight back against these structures. But individual resilience isn't enough. We are using this session at 39C3 to found a community that refuses to accept institutional discrimination. Our goal is to organize peer support, expose systemic abuse, and build a solid infrastructure for mutual aid. This is not a lecture. Together, we will define how this collective will operate. Bring your anger, your ideas, and your skills. Let’s hack the structures that try to shut us out. Lucifer https://events.ccc.de/congress/2025/hub/event/detail/lasst-uns-die-diskriminierung-von-neurodivergenten true 2025-12-29T11:00:00+01:00 11:00 01:20 SoS Workshop D 39c3-teamdatenschutz-meetup de, en other The [#TeamDatenschutz](https://events.ccc.de/congress/2025/hub/tag/TeamDatenschutz) (team data protection) is used in the (more or less) social networks to assemble data protection officers, programmers, lawyers, activists, or supervisory authorities, as well as other people interested in data protection. This Self-organized Session - attempting to is intended as a meet up, where people can meet other persons interested in data protection, maybe see someone again, and for sharing or ranting about data protection topics and issues, etc. luap42 (er/ihm, he/him) https://events.ccc.de/congress/2025/hub/event/detail/teamdatenschutz-meetup true 2025-12-29T12:30:00+01:00 12:30 00:25 SoS Workshop D 39c3-omnibus-vs-digitalrechte_6jd6 de, en other The ‘Digital Omnibus’ is a collection of proposals from the EU Commission to deregulate existing digital laws, which are actually there to protect people. The General Data Protection Regulation (GDPR) and the AI Regulation (AI Act) will be watered down under the pretext of supposed reduction of bureaucracy . Instead of helping ‘small and medium-sized enterprises’ or start-ups in Europe, as promised, it is primarily US big tech giants that would benefit, and the European Commission's proposals read like an implementation of the Trump administration's wish list. The session is intended to be a networking meeting for civil society NGOs and individuals to stop the omnibus bill. This session follows a talk on the topic on Day 1, which we therefore recommend: https://events.ccc.de/congress/2025/hub/de/event/detail/throwing-your-rights-under-the-omnibus-how-the-eu-s-reform-agenda-threatens-to-erase-a-decade-of-digital-rights e-punc (der / he) tyncet https://events.ccc.de/congress/2025/hub/event/detail/omnibus-vs-digitalrechte_6jd6 true 2025-12-29T13:00:00+01:00 13:00 01:20 SoS Workshop D 39c3-vegan-chaos-bring-along-fingerfood-brunch de, en other **Meet & Eat: Come to the Vegan Chaos Bring-Along Fingerfood Brunch! Bring whatever you like, sweet or savoury, anything goes as long as it's vegan!** The great thing about this principle: It will scale. If everyone brings something, there is always enough – no matter how many people will be there. Due to the special congress situation, finger food is best suited for this get-together. If you have access to a kitchen, feel free to prepare something! If not: go to the supermarket, see what's available, and improvise. To be prepared for anything, bring your own cups, dishes & forks if you need them. ### More Information: - To the **[Vegan Chaos Community Assembly](https://events.ccc.de/congress/2025/hub/en/assembly/detail/vegan_chaos)** - Follow us at Mastodon: **[@vegan@chaos.social](//chaos.social/@vegan)** ### Our Events: - 27.12. | 13:00 | Room D | **[Vegan Chaos: Welcome Meet & Greet](https://events.ccc.de/congress/2025/hub/en/event/detail/vegan-chaos-welcome-meet-greet_zdm4)** - 27.12. | 20:30 | Assembly | **[Vegan Chaos: Let's Talk](https://events.ccc.de/congress/2025/hub/en/event/detail/vegan-chaos-lets-talk-day-1)** - 28.12. | 11:30 | Assembly | **[Vegan Chaos: Let's Talk](https://events.ccc.de/congress/2025/hub/en/event/detail/vegan-chaos-lets-talk-day-2)** - 29.12. | 13:00 | Room D | **[Vegan Chaos: Bring-Along Fingerfood Brunch](https://events.ccc.de/congress/2025/hub/en/event/detail/vegan-chaos-bring-along-fingerfood-brunch)** - 29.12. | 18:30 | Assembly | **[Vegan Chaos: Let's Talk](https://events.ccc.de/congress/2025/hub/en/event/detail/vegan-chaos-lets-talk-day-3)** - 30.12. | 11:00 | Room 6 | **[Vegan Chaos: Farewell Meeting](https://events.ccc.de/congress/2025/hub/en/event/detail/vegan-chaos-farewell-meeting)** [](https://events.ccc.de/congress/2025/hub/en/assembly/detail/vegan_chaos) ganzesaetze (he/him) phil_vcc (he/him) https://events.ccc.de/congress/2025/hub/event/detail/vegan-chaos-bring-along-fingerfood-brunch true 2025-12-29T14:30:00+01:00 14:30 00:25 SoS Workshop D 39c3-meet-the-funders-sovereign-tech-agency-nlnet-proto en, de other Are you looking for funding for your project? Unsure if your new idea would be likely to get support? Interested in applying for a grant, in getting to know who ensures funds run smoothly or simply curious? Come say hi! We're here to answer all your questions about our funds. At this meetup you will have the opportunity to meet team members from the following funds: The Prototype Fund supports software developers, designers and other creatives in transforming their ideas from a concept into a software prototype. Together we explore and test new ways for technical and social innovations as open source software from society and for society. NLnet foundation (after its historical contribution to the early internet in Europe) has been financially supporting organizations and people that contribute to an open information society since 1997. It funds those with ideas to fix the internet. The procedure is fast, competitive and open to anyone. The Sovereign Tech Agency supports the development, improvement and maintenance of open digital infrastructure. Our goal is to sustainably strengthen the open source ecosystem. We focus on security, resilience, technological diversity, and the people behind the code. shiro https://events.ccc.de/congress/2025/hub/event/detail/meet-the-funders-sovereign-tech-agency-nlnet-proto true 2025-12-29T17:00:00+01:00 17:00 00:50 SoS Workshop D 39c3-mocha-with-metamours-a-world-cafe-on-decoding_gum6 en, de other Abstract: The world café creates a space for exchanging stories and insights about ethical non-monogamy (ENM) through rotating small-group conversations. Departing from the experiences of everyone in the room, we'll explore the realities of ENM life, learn from each other's stories and questions and decode relationship patterns. The café is primarily for those practicing ENM, regardless: those who are curious/exploring are equally welcome. catileptic (they/she) https://events.ccc.de/congress/2025/hub/event/detail/mocha-with-metamours-a-world-cafe-on-decoding_gum6 true 2025-12-29T18:15:00+01:00 18:15 01:00 SoS Workshop D 39c3-lingo-coordination-3 other Coordination Meeting of Lingo angels https://events.ccc.de/congress/2025/hub/event/detail/lingo-coordination-3 true 2025-12-29T21:30:00+01:00 21:30 00:50 SoS Workshop D 39c3-digitale-infrastruktur-fur-videos-und-podcasts-wis de, en other _This is the workshop for the [WissKomm Wiki Talk](https://events.ccc.de/congress/2025/hub/de/event/detail/digitale-infrastruktur-fur-videos-und-podcasts). Listening to the talk is helpful, but not necessary. You can also listen to the [GPN23 Talk](https://media.ccc.de/v/gpn23-299-ctrl-f-for-facts-mit-dem-wisskomm-wiki-filterblasen-erkennen-und-fakten-sichtbar-machen) or just drop by - we look forward to seeing you :)_ “[Who's speaking?](https://media.ccc.de/v/gpn23-213-lanzmining-wer-spricht-denn-da-),” asked arrrrrmin at GPN23. But finding out who speaks how often on talk shows, etc., takes weeks. But why has no one structured this flood of videos and podcasts yet? Especially now that AI slop is permeating all media, it's becoming increasingly difficult to figure out what's behind what you're hearing. If you, like arrrrrmin, are looking for answers, the WissKomm Wiki is for you. The project has been in planning since 2021 and will officially launch in 2026 to make videos and podcasts more accessible and understandable for everyone in many workshops like this one. If you want to know more about videos and podcasts, check out the [video at C3PB](https://c3pb.de/blog/vorstellung-der-idee-des-wisskomm-wikis.html), take a look at the [project website](https://borgnetzwerk.org/wisskomm-wiki-2026), but most importantly: Come by the 39C3 workshop :) We look forward to seeing you! TimBorgNetzWerk https://events.ccc.de/congress/2025/hub/event/detail/digitale-infrastruktur-fur-videos-und-podcasts-wis true 2025-12-29T22:30:00+01:00 22:30 02:55 SoS Workshop D 39c3-ropelabs-rope-jam en other **⚠️ This is a sober event. Anyone we suspect is intoxicated will be turned away.** A rope jam is an open, unstructured space to practice, explore, and share rope skills together. You can arrive alone, with a partner, or in a small group. You are welcome to tie, be tied, switch roles, self-tie, observe, or simply quietly talk rope. We will start with a short introduction and matching game to help connect people who arrive on time. Late arrivals will not be admitted. You may also bring your own partner or choose to observe only. This is a non-sexual space. Sensual, rope-focused play is permitted. Wear what you want. A minimum level of coverage is required at all times, as would be expected in a gym. The event is open to participants aged 18 and over. What to bring * Non-stretch rope if you have it * A blanket or cushions for sitting on the floor * Comfortable clothing. Avoid loose layers if possible * A small amount of practice rope will be available. Rules * Consent is mandatory. Always ask first. * Respect boundaries, focus, and personal space. * Do not interrupt active scenes. * Keep conversation low and rope-focused. * No photography unless everyone involved agrees. Whether you are new to rope or have years of experience, this is a relaxed space to learn, practice, and connect. Come say hi, we do not bite unless asked. Location and time may still change. Places are limited by room size. You will need a ticket per person. Get your free ticket here: [https://ticket.kinkygeeks.de/kinkygeeks/ropelabs-ropejam/](https://ticket.kinkygeeks.de/kinkygeeks/ropelabs-ropejam/) Pez (he/they) https://events.ccc.de/congress/2025/hub/event/detail/ropelabs-rope-jam true 2025-12-30T01:30:00+01:00 01:30 00:50 SoS Workshop D 39c3-lesswrong-congress-meetup de, en other This is a meetup for everyone already being part of or interested in the LessWrong/Rationality movement. The idea is to have a short introduction to Rationality and exchange ideas across city-borders. Wikipedia: > LessWrong [...] is a community blog and forum focused on discussion of cognitive biases, philosophy, psychology, economics, rationality, and artificial intelligence, among other topics. It is associated with the rationalist community. NOTICE: "artificial intelligence" is in relation to artificial general intelligence (AGI) which are speculated since the 50s and there are no technologies like this invented yet. This has nothing to do with transformers / LLM / GPT. My (saxnot) personal favourite ist [https://www.lesswrong.com/s/HXkpm9b8o964jbQ89](https://www.lesswrong.com/s/HXkpm9b8o964jbQ89) about molloch (complexity/clutter) away from your calendar/todo/life [https://www.lesswrong.com/](https://www.lesswrong.com/) saxnot (he/him) https://events.ccc.de/congress/2025/hub/event/detail/lesswrong-congress-meetup true 2025-12-29T15:00:00+01:00 15:00 02:00 SoS Workshop D 39c3-haecksen-picknick-fur-alt-haecksen_i0dn de, en other Haecksen-Picknick für bereits beigetretene Haecksen Every year, we meet for the traditional Haecksen picnic at the Congress, exchange ideas and plan for the coming year. Note: This picnic is not intended for the admission of new Haecksen. If you would like to join the Haecksen, please attend the [picnic for new Haecksen](https://events.ccc.de/congress/2025/hub/en/event/detail/haecksen-picknick-fur-noch-nicht-haecksen_gyr8) on day 2 at 2 p.m. as your first event! Deanna (keins/none-they/them) https://events.ccc.de/congress/2025/hub/event/detail/haecksen-picknick-fur-alt-haecksen_i0dn true 2025-12-29T19:30:00+01:00 19:30 02:00 SoS Workshop D 39c3-3-congress-skatturnier-auf-dem-39c3_9q70 de, en other Zweite Serie des 3. Congress Skatturnier auf dem 39C3. Second series of the 3rd Congress Skat Tournament at the 39C3. This is the 2nd series of the [3rd Congress Skat Tournament at 39C3](https://0x1b.de/39c3Skat/Skatturnier.html). A non-binding registration for both series can be done at [Nuudel](https://nuudel.digitalcourage.de/xe7sI6LzCfXXXEUm). The first 48 registrants are guaranteed a spot, after which a waiting list will be created. The second series can only be played if the first series has also been played. segal https://events.ccc.de/congress/2025/hub/event/detail/3-congress-skatturnier-auf-dem-39c3_9q70 true 2025-12-29T10:00:00+01:00 10:00 03:00 SoS Saal 6 39c3-numerical-weather-prediction de, en other We show how Numerical Weather Prediction works, and which software and data is needed to run your own NWP system. IMPORTANT -> to prepare, please clone the repo https://git.hacknology.de/tecer/wrf-docker and follow the instructions to build the docker images wrf and wrfpp and the docker volume. The images are also available on the docker hub registry: "tcriess/wrf" and "tcriess/wrfpp". Raziel tecer https://events.ccc.de/congress/2025/hub/event/detail/numerical-weather-prediction true 2025-12-29T13:00:00+01:00 13:00 01:55 SoS Saal 6 39c3-heaven-3 other https://events.ccc.de/congress/2025/hub/event/detail/heaven-3 true 2025-12-29T15:00:00+01:00 15:00 01:20 SoS Saal 6 39c3-asd2 other Hi 39c3, The Chaos Communication Choir is back! After a three-year break, this time we’ve got a new piece about a special bus called Adenauer, plus the classic Heaven can’t wait, which started it all back in 2017. You can find sheet music and practice tracks here: https://www.ccchoir.de For more info on the choir’s history and what we’ve been up to, check this out: https://fairybotorchestra.bandcamp.com On Day 3 at 9:00 PM at Späti, everyone is invited to join in and sing—at the Punk Karaoke Special with the band Der Untergang! thiesmynther https://events.ccc.de/congress/2025/hub/event/detail/asd2 true 2025-12-29T16:30:00+01:00 16:30 00:25 SoS Saal 6 39c3-unsicherheitspaket de other Meet-up for people interested in fighting against the "Unsicherheitspaket 2.0" surveillance measures. tyncet e-punc (der / he) https://events.ccc.de/congress/2025/hub/event/detail/unsicherheitspaket true 2025-12-29T17:00:00+01:00 17:00 00:50 SoS Saal 6 39c3-power-play-cycles de other What happens when players rewrite the rules of economic simulation games instead of obeying them? By hacking classics like Hammurabi, Oregon Trail, and Lemonade Stand, this talk explores how code, ideology, and play form power cycles—and how breaking them turns market logic into creative resistance. hands-on session afterwards (from 5.30pm): https://events.ccc.de/congress/2025/hub/de/event/detail/power-play-cycles-hands-on Slides: https://docs.google.com/presentation/d/10aPPQov41A_9ySeQzuhuVZIn4arK4hLiqX6m82OYuRU/edit?usp=sharing – Economic power hides in rules. Early home-computer “market simulators” such as Hammurabi, Oregon Trail, and Lemonade Stand encoded entire ideologies of productivity, scarcity, and profit into a few dozen lines of BASIC. They taught us how to play the economy — literally. But what happens when players stop following those rules and begin to rewrite them? This talk explores the power cycles inside these classic games: loops of control between player, program, and system. By modifying code, exploiting glitches, and bending rule sets, we can expose how computational models reproduce economic dogmas—and how small hacks can turn libertarian fantasies into playful counter-economies. Through live demonstrations and short historical dives, we’ll trace how the simple act of “cheating” becomes a tool of critique. Each intervention reveals a new feedback loop between code and ideology: where every CPU cycle becomes a site of political power. Can a hacked simulation still be fun? Can rewriting a game’s rules help us imagine different systems of value and exchange? Between nostalgia, code archaeology, and playful subversion, this session invites you to rethink what—and who—games simulate when we let the power cycle run differently. doczx Mikroprofessor https://events.ccc.de/congress/2025/hub/event/detail/power-play-cycles true 2025-12-29T18:15:00+01:00 18:15 01:00 SoS Saal 6 39c3-video-mixer-3 other Scheduling Meeting for Video Mixer Angels https://events.ccc.de/congress/2025/hub/event/detail/video-mixer-3 true 2025-12-29T19:30:00+01:00 19:30 00:50 SoS Saal 6 39c3-esperanto-schnupperkurs-esperanto-lightning-c_uzyw en, de other A short sneak peek course to the International language Esperanto. Esperanto is a planned language, initiated more than 130 years ago by Ludwik Lejzer Zamenhof. Nowadays it is spoken by more than 100 000 people worldwide. We are people who for many years have been speaking Esperanto in our every day life. Its the language of our global circle of friends. As there are quite some parallelisms between the worldwide Esperanto community and the worldwide hacker scene, usually there are some Esperanto speakers attending the big Chaos events. Of course we cannot give a comprehensive course about Esperanto, but a few insights to the language and its community first hand. The slides are available here: https://c3esperanto.github.io/kurseto/ johmue https://events.ccc.de/congress/2025/hub/event/detail/esperanto-schnupperkurs-esperanto-lightning-c_uzyw true 2025-12-29T20:30:00+01:00 20:30 00:50 SoS Saal 6 39c3-was-ist-awareness-was-macht-c3awareness_qmf7 de, en other Are you interested in awareness work during Chaos events? Would you even like to help the c3awareness Team? Come by and get to know us then! We will talk a bit about how we work - during the events and throughout the year. There will be a chance to ask questions and there are some things we would like your opinion on as well! fuchsi Keks https://events.ccc.de/congress/2025/hub/event/detail/was-ist-awareness-was-macht-c3awareness_qmf7 true 2025-12-29T21:30:00+01:00 21:30 00:50 SoS Saal 6 39c3-ethical-non-monogamy-is-not-only-for-millenia_l336 en other Polyamory, Open Relationships, Relationship Anarchy and all the other types of ethical non monogamy, or ENM for short, seem to associated with the lifestyle of thirty-somethings – but that isn't really a hard rule and I, being an old white male myself, would like to learn and share a little bit about the challenges of ethical non-monogamy in a world where the norm is unethical non-monogamy a mono-normative value-system on the outside. so-ka (he / him) https://events.ccc.de/congress/2025/hub/event/detail/ethical-non-monogamy-is-not-only-for-millenia_l336 true 2025-12-29T22:30:00+01:00 22:30 00:25 SoS Saal 6 39c3-look-what-i-found-osint-resources-in-conflicts en, de other In the context of russia's war of aggression against Ukraine, open-source intelligence (OSINT) plays a significant role in public perception. We will briefly examine some interesting sources and tools and consider what information they make publicly available. Material from the talk will be published in a few days at https://chaos.social/@uact/115804886087347625 mfi https://events.ccc.de/congress/2025/hub/event/detail/look-what-i-found-osint-resources-in-conflicts true 2025-12-29T23:00:00+01:00 23:00 00:50 SoS Saal 6 39c3-a-visit-to-the-catacombs-of-dammtor en other "Welcome to the catacombs of Dammtor, the grandest and one of the most ancient in Hamburg. For those of you who have booked in advance please step inside. I trust you have all signed the waiver as instructed? Good. This visit will be of a long duration. Now, please hand over your tickets...” I will read to you a short horror story in which you follow a guide deep down into the intricate catacombs of Dammtor below CCH, visit the ancient sacred grounds built over centuries - and learn about a ritual only available to the most privileged... This is not a graphic or scary story but more of a cozy "Gruselgeschichte", which I think will fit very nicely in the late hours after the talks. "A Visit to the Catacombs of Dammtor" is based on the original work "A Visit to the Catacombs of Via Altamonvecchi" by J. Weintraub, originally published in Karamu (vol. xx, no. 2, Spring 2007), a literary review out of Eastern Illinois University. Performed with express permission by the author. Trigger warnings (spoilers below!): Includes mentions of claustrophobia, confinement, abandonment, religious rituals, cannibalism, injury/death, rodents rhandos (she/her) https://events.ccc.de/congress/2025/hub/event/detail/a-visit-to-the-catacombs-of-dammtor true 2025-12-30T00:00:00+01:00 00:00 00:50 SoS Saal 6 39c3-tor-relay-operators-meetup en other Official 39C3 Tor Relay Operators Meetup supported by the Tor Project. As always, TROMs are open for everyone who is running a relay, wants to run a relay or just thinks about it. 🙂 At this point we don't have a agenda, but everyone is free to bring up questions or topics at the meeting itself. Leibi https://events.ccc.de/congress/2025/hub/event/detail/tor-relay-operators-meetup true 2025-12-30T01:00:00+01:00 01:00 01:20 SoS Saal 6 39c3-flinta-cruising-see-description-if-this-sounds-app other **UPDATE SINCE LAST YEAR: clothing MANDATORY!!!!!! NOT a sex party (I have nothing against sex parties but its against CCC rules to organize an SoS session-sex party) WHO IT’S FOR: 18+ IF YOU CLICKED, THIS IS PROBABLY FOR YOU!!! (like - if you're considering "hmm am I flinta enough?" it means you're flinta enough) everyone who doesn’t feel at home in straight flirting nor in gay male cruising spaces. Transbians, butch lesbians, bicurious curious “straight” girls, transmascs, “I wish I was trans so I could wear a skirt”-people, those who don’t identify.. etc etc. WE DONT ASK, IF YOU WANT TO BELONG, YOU BELONG!!! DESCRIPTION: Ever had the fantasy of silent, sexy encounters with strangers? No strings attached, no complications - just a signal to ask for consent and then you kiss? This is exactly what this is. You are encouraged to explore non verbal interaction, especially since so many of us feel social pressure to be shy, therefore we will use hand signals. HOW IT WORKS: TO ASK PERMISSION, LOCK EYES+SMILE, MOVE SLOWLY TOWARDS THE PERSON. TO SAY YES, meet their eyes, smile back, walk slowly to them also. TO SAY NO turn your head away and move a step in a different direction. TO ASK FOR A KISS/makeout session, point to your lips. To ask to be touched in any specific area, point to it, or move the persons hand there To say now, or slow things down, take the persons hand and move it away/put it where you would rather have it. To say no mid kiss, put your hand on the person and gently push them away. For this to work, YOU HAVE TO TAKE RESPONSIBILITY FOR YOUR DESIRE. YOU HAVE TO SAY/SHOW NO WHEN YOU’RE NOT INTERESTED You can say no at any time. No strings attached. Don’t worry about disappointing the person. This can only be a safe space to take initiative if we can also trust each other to say no, and ask for what they want. LOCATION: SoS Hall 6 https://39c3.c3nav.de/l/sos-6/ Looking for a hackery person to set up the music tech for mood ambience music in the sound system!! As well input/ideas for music/playlists/genres you think would be nice Please contact me @zackstarkid@kolektiva.social on mastodon. Or toot using the hashtag [#flintaparty2](https://events.ccc.de/congress/2025/hub/tag/flintaparty2) (but pls tag me!) We zackstarkid (he/him (they/them if ur trans)) https://events.ccc.de/congress/2025/hub/event/detail/flinta-cruising-see-description-if-this-sounds-app true 2025-12-29T09:30:00+01:00 09:30 00:50 Komonin 39c3-wie-kann-gute-mannerarbeit-gelingen de other Männerkreis: Disclaimer: Dies soll ein Safespace für Cis Männer sein, wir möchten allerdings gerne von FLINTA* Personen lernen, daher findet der gleiche Workshop nochmal als [all Creatures welcome] statt In dem Workshop wollen wir uns zu folgenden Fragen ins Gespräch kommen: - Welche Erfahrungen haben wir mit Männerarbeit? - Wie holen wir uns (auch außerhalb der Bubble) ab? - Wie schaffen wir es den Bruch zu unseren Schwestern* anzuerkennen und auszuhalten ohne uns dabei zu entmündigen und zu verachten - Wie schaffen wir es unsere Schutzwalle soweit unten zu lassen, damit wir lernen können, aber trotzdem liebevoll und sorgsam mit uns umzugehen? - Wie können wir uns trotz unseres internalisiertem Leistungsanspruchs erlauben uns klein, bedürftig und unsicher zu zeigen? Ich bin Timon (er) von menbracing. Wir sind eine kleine Initiative von Männern die sich inspiriert von der Arbeit von Bell Hooks, Adrienne Maree Brown, Veit Lindau und Anderen an männlicher Care-Arbeit versuchen. Anmerkung: Wieso ist der Raum derzeit nicht offen für Trans-Männer? Zuerst Trans-Männer sind Männer! Ich (Timon) hab aber keine Erfahrung in der Arbeit mit Trans-Männern, kann daher nicht einschätzen ob es die soziale Dynamik ändert und ob ich das dann gut moderieren kann. Nachdem aber die Session an Tag 3 ist, bin ich offen für Austausch, schreibt gerne :) muckla https://events.ccc.de/congress/2025/hub/event/detail/wie-kann-gute-mannerarbeit-gelingen false 2025-12-29T10:30:00+01:00 10:30 00:50 Komonin 39c3-treffen-der-bahn-chaosbubble de, en other this shall be a meetup of train-interested people and nerds. unconference-style, whoever wants to participate and wants to talk about a topic, just come in and announce your topic. If there isn't enough time, the conversations can always be continued elsewhere. darkfrone (he/him) https://events.ccc.de/congress/2025/hub/event/detail/treffen-der-bahn-chaosbubble false 2025-12-29T12:30:00+01:00 12:30 00:25 Komonin 39c3-ddnet-meetup en, de other DDNet community and developer meetup. We'll showcase a new project and have time for any any DDNet related topic. All creatures welcome! Zwelf https://events.ccc.de/congress/2025/hub/event/detail/ddnet-meetup false 2025-12-29T13:00:00+01:00 13:00 00:25 Komonin 39c3-selbsthilfegruppe-unternehmens-it-enterprise-it-su de, en other Finally NIS.2 will arrive in most european countries, let's chat about our experience with the way enterprise (=legacy ?) software vendors deal with security. d2887 https://events.ccc.de/congress/2025/hub/event/detail/selbsthilfegruppe-unternehmens-it-enterprise-it-su false 2025-12-29T13:30:00+01:00 13:30 00:25 Komonin 39c3-hackspace-entwicklung-einer-app-fur-die-dezentrali de, en other In Leipzig, the initiative Nein zur Bezahlkarte (“No to the Payment Card”) has been organizing a solidarity-based voucher exchange for over a year to circumvent the harassment and discrimination of asylum seekers caused by the payment card system. The voucher exchange has now reached a scale that presents us with organizational challenges: 1. To organize the exchange as coordinately as possible—and thus as fairly and stress-free as possible for everyone interested in exchanging—we work with a registration system. This requires a great deal of communication, which currently takes place via WhatsApp. As demand and thus the number of requests continue to grow, the communication effort can hardly be managed in this way any longer. 2. We constantly need more money to meet the growing demand. This leads to an ever-increasing cash reserve that must be managed by the initiative. We therefore want to decentralize our offering—and with it the cash reserve—and empower more small groups and initiatives to create decentralized exchange offers that are nevertheless coordinated with each other. To this end, we have developed an app idea intended to serve as a platform where exchange offers created in a decentralized manner can be posted, and which people with payment cards who want to exchange vouchers for cash can access in a low-hierarchy way to search for an exchange offer. The app is intended to be available nationwide for the dozens of exchange initiatives. In this way, it aims to help ensure that the voucher exchange—emerging in many places from spontaneous solidarity-based practice—can remain possible in the long term, as long as the discriminatory practice of payment cards is not abolished by federal legislation. We have developed a basic structure for the app, which is to be implemented by two developers next year. At the SoS, we would like to invite people to a hackspace in order to present the development of the app and reach out to more people with coding skills, and to motivate them to support the work. neinzurbezahlkarte https://events.ccc.de/congress/2025/hub/event/detail/hackspace-entwicklung-einer-app-fur-die-dezentrali false 2025-12-29T15:00:00+01:00 15:00 00:50 Komonin 39c3-self-organized-infrastructure-meetup de other https://events.ccc.de/congress/2025/hub/event/detail/self-organized-infrastructure-meetup false 2025-12-29T17:00:00+01:00 17:00 00:50 Komonin 39c3-security-at-startupssmall-teams en other https://docs.google.com/presentation/d/1DpV4sVjJ__9z0k74aTIG5l8h2qM3nG-9caeSTv6Suig/edit?usp=sharing Available until day 3 + 7 days. Contains contact and slides. The only skipped slide is the one about rulesets, it also contains an OSS release for compliance work. -------- How do you manage security in small software engineering teams or startups (2-50 people)? What did you implement? Which changes did you implement or push for as a security person? I previously worked at a small NGO and startup and want to create a space to share experiences. Initially, I'll give some insights about what I implemented in the past year, however the goal is to have a discussion. Topics might include: - Fuzzing - Responsible disclosure (both incoming and outgoing) - DefectDojo, Dependabot and SecObserve - GitHub's security features - Static analyzers ranging from Semgrep to Zizmor Put in notes here if you want to join! https://cryptpad.fr/pad/#/2/pad/edit/3iZ8MLCkX9I3xcTsh6uc2LwA/ max1 https://events.ccc.de/congress/2025/hub/event/detail/security-at-startupssmall-teams false 2025-12-29T18:00:00+01:00 18:00 00:25 Komonin 39c3-the-state-of-leo-satellite-enthusiast-meetup en, de other The aim of this low-key meet-up is to discuss the current state of LEO / MEO constellations and the benefits they provide. We will also discuss potential risks and vulnerabilities as well as future fields for research in the security community. beeblebroxx https://events.ccc.de/congress/2025/hub/event/detail/the-state-of-leo-satellite-enthusiast-meetup false 2025-12-29T19:30:00+01:00 19:30 00:50 Komonin 39c3-hacking-edge-ai en other AI is moving from the Cloud to the Edge. Seeing the impossibility of scaling transformers on GPU clusters and the wild amount of cash flowing to anything that can be called AI. Now using a variety of specialised and exotic hardware companies are applying AI at our doorsteps, telephone masts, street lights. Companies like Flock Safety apply AI at the edge in their cameras they claim for efficiency and privacy. Yet, they now fail on both counts. Now that AI is breaking out of the climate controlled data centres. Will it become more smash-able, controllable? Can we prefigure convivial visions of AI? Or, will we see the next round of datafication of the enclosure? What is the Internet of Battlefield Things and how can we fight it? I plan to show some Edge-AI boards and applications. And hope for some help in attempting to find out its limits and vulnerabilities. https://events.ccc.de/congress/2025/hub/event/detail/hacking-edge-ai false 2025-12-29T20:30:00+01:00 20:30 00:50 Komonin 39c3-lote-deinen-eigenen-euclidean-sequencer_lzen de, en other The Euclidean Sequencer is a hardware gadget developed by students from Cologne. It uses the Euclidean algorithm to find the greatest common divisor of two numbers, thereby creating a sequence. The sequence can be modified using two potentiometers and can be connected to another sequencer or external devices, such as speakers. We only have a few solder kits left. Fist come first served! The recommended price for the workshop is €30. carinalntz https://events.ccc.de/congress/2025/hub/event/detail/lote-deinen-eigenen-euclidean-sequencer_lzen false 2025-12-29T21:30:00+01:00 21:30 01:20 Komonin 39c3-mushroomclub en other Lets get together fellow fungi people. Lets talk about growing them at home, identification, using them in projects, nature and more… everyone is welcome - even if you havent started your new hobby yet. Thistle https://events.ccc.de/congress/2025/hub/event/detail/mushroomclub false 2025-12-29T23:30:00+01:00 23:30 00:25 Komonin 39c3-reform-des-nachrichtendienstrechts-austausch-uber- de other Die deutsche Bundesregierung plant aktuell die Reform des Nachrichtendienstrechts. Was bei der medialen Aufregung oft unerwähnt bleibt: Die neuen Regelungen spielen mit Feuer mit Leib und Leben höchstgefährdeter Personen. Das Problem: Ein ex post Rechtsschutz kommt meistens zu spät, nachdem der gravierende Schaden bereits eingetreten ist. Das bedeutet, der Schadensfall muss bereits ex ante durch präventive Schutzkonzepte und Handlungsvorschläge möglichst verhindert werden. In einer Austauschsession soll besprochen werden, wie mögliche Handlungsvorschläge, Standards und policy-Entwürfe für ex ante Schutzkonzepte und möglichst effizienten Rechtsschutz im Eilfall entwickelt und verbreitet werden können. Zielgruppe sind nicht nur Jurist:innen, sondern insbesondere auch gefährdete Personen und solche, die mit ihnen zusammenarbeiten (insb. Journalist:innen, Anwält:innen, etc). Die Organisationskreatur ist Jurastudi in Examensvorbereitung. eugene (he/him) https://events.ccc.de/congress/2025/hub/event/detail/reform-des-nachrichtendienstrechts-austausch-uber- false 2025-12-30T00:00:00+01:00 00:00 00:25 Komonin 39c3-interslavic-2 en other Stille Post? Głuchy Telefon? Kak byhmo nazvali izvěstne igry? Kakyh izrěčenij hocemy upotrěbjati? Vozmimo medžuslovjansky w naše ruki :) doofus https://events.ccc.de/congress/2025/hub/event/detail/interslavic-2 false 2025-12-30T00:30:00+01:00 00:30 00:25 Komonin 39c3-git-annex-workshop de, en other Ever wanted to have proper version control but for all of your files, not just plain-text? Sounds crazy but git-annex makes it possible. If you're already a user or just curious about the tool, come by and have a chat! :) - Get introductions, tips and tricks - Bring your issues and solutions - Show off cool things you do/did using git-annex Those who are not (yet) users are also welcome and can get introductions and explanations. It's assumed you are already comfortable with using git and the CLI in general though. There is no fixed schedule or agenda. The primary purpose is to share our love for this amazing tool :) https://git-annex.branchable.com/ Atemu https://events.ccc.de/congress/2025/hub/event/detail/git-annex-workshop false 2025-12-30T01:00:00+01:00 01:00 01:20 Komonin 39c3-we-are-battlefields-film-mathieu-rigouste2024-das- en, de other CN: oppression, violance, repression “Since the early 2000s, I've been investigating oppressive security and surveillance systems oppressive security and surveillance systems while actively engaging with activism and political while actively engaging with activism and political movements. Because of this, I've been put on movements. Because of this, I've been put on a watch-list by the French government’s government’s intelligence services. I believe that we need to better understand, to understand the control and crushing power forced upon us, the people, by the war machine. My determination to people, by the war machine. My determination to fight against these powers led me to go and fight against these powers led me to go and investigate the problem at the heart of the French investigate the problem at the heart of the French war machine – Milipol – the world's leading trade war machine – Milipol – the world's leading trade fair for internal state security. Follow me behind the scenes of this global business. Together, we'll investigate the making of business. Together, we'll investigate the making of wars, the globalization of surveillance and the wars, the globalization of surveillance and the business of repression. The aim of this investigation is to shed light on the inner workings of a system by letting its main inner workings of a system by letting its main players tell their own stories, face-to-face with the players tell their own stories, face-to-face with the camera. We will reflect on our findings with camera. We will reflect on our findings with the help of those who suffer at the hands of the military industrial complex on a daily basis and military industrial complex on a daily basis and who are constantly fighting it in order to exist. Throughout our investigation, we question our participation in systems and the order of things in the world. Similarly, we question our ability to the world. Similarly, we question our ability to preserve and transform ourselves. In the reflection of the war machine, we face ourselves and what we want to become." Mathieu Rigouste - investigative journalist / filmmaker https://mathieurigouste.net/-Nous-sommes-des-champs-de-bataille- https://events.ccc.de/congress/2025/hub/event/detail/we-are-battlefields-film-mathieu-rigouste2024-das- false 2025-12-29T11:30:00+01:00 11:30 01:00 Komonin 39c3-aktuelle-proteste-gegen-verscharfungen-von-polizei de other Palantir, biometrische Rasterfahndung, KI-gestützte Videoüberwachung, Staatstrojaner – staatlichen Repressionsbehörden stehen immer mehr Gruseltechnologien zur massenhaften Überwachung bereit und die Länder ziehen nach, die rechtlichen Grundlagen für deren Einsatz zu schaffen, wobei Grundrechte immer weiter ausgehöhlt werden. Während es gegen die ersten neuen Polizeigesetze zB in Bayern, NRW und Sachsen um 2018/19 noch große Protestwellen gab, kommt mensch inzwischen kaum hinterher, alle aktuellen Änderungen im Blick zu behalten, nennenswerte öffentlichkeitswirksame Proteste scheint es kaum noch zu geben. So konnte vor wenigen Wochen in Berlin eines der grundrechtseinschränkensten Polizeigesetze beschlossen werden, von dem vorher kaum wer etwas mitbekommen hat. In vielen Bundesländern stehen weitere Verschärfungen bevor. Wir wollen hier einen Raum schaffen, um Erfahrungen zu vergangenen Protesten gegen Polizeigesetzänderungen auszutauschen, zu analysieren, welche Strategien (nicht) wirksam waren und warum wir mit dem Protest nicht mehr hinterher kommen, und uns für anstehende Proteste zu vernetzen. https://events.ccc.de/congress/2025/hub/event/detail/aktuelle-proteste-gegen-verscharfungen-von-polizei false 2025-12-29T14:00:00+01:00 14:00 01:00 Komonin 39c3-komona-we-can-make-it-work-plenary_ged1 en, de other Let's meet and discuss everything what's necessary, and everything what's not. https://events.ccc.de/congress/2025/hub/event/detail/komona-we-can-make-it-work-plenary_ged1 false 2025-12-29T16:00:00+01:00 16:00 01:00 Komonin 39c3-gesprachsrunde-zum-umgang-linksradikaler-und-anarc de other Instagram, Facebook, TikTok und co sind aus linker und/oder herrschaftskritischer Perspektive hoch problematisch. In a Nutshell lassen sich diese Dienste im Grunde zusammenfassen als digitale Designerdrogen mit einem Algorithmus der auf maximale Suchterzeugung optimiert ist. Im Grunde eines der ethisch fragwürdigsten Produkte die der Kapitalismus des 21. Jahrhunderts zu bieten hat. Dazu zentralisiert in den Händen von den ekelhaftesten der ekelhaften Großkonzerne und mit völlig normalisierter sexistischer und queerfeindlicher Zensur. Hier ließen sich noch eine Million weitere Gründe anführen, warum diese Dienst nicht nur aus linker und herrschaftskritischer Perspektive nicht genutzt werden sollten, sondern eigentlich neben Kohlekraftwerken und Waffenfabriken eines der Hauptziele von unseren Aktionen sein sollten. Aber nein, in den allermeisten linken und anarchistischen Kontexten, wird Instagram und co völlig unkritisch genutzt. Teilweise wird es sogar von Linken aktiv beworben oder es wird vorausgesetzt es zu nutzen um Informationen zu bekommen. What the Fuck? Wir wollen darüber reden, wie um alles in der Welt es soweit kommen konnte und was wir dagegen tun können. Please: Das ist kein Ort für die Grundsatzdebatte ob Instagram und co denn "wirklich so schlimm" sind. Wenn ihr so eine Session wollt macht eure eigene. Das hier soll eine Veranstaltung für Menschen sein, die die Kritik teilen und sich darüber austauschen wollen, wie sie in linker Szene Bewusstsein für die Problematik schaffen können. Und: es soll explizit um linkspolitische Kontexte gehen. Luna https://events.ccc.de/congress/2025/hub/event/detail/gesprachsrunde-zum-umgang-linksradikaler-und-anarc false 2025-12-29T18:30:00+01:00 18:30 01:00 Komonin 39c3-brainstorming-politischer-kampf-und-direkte-aktion de other "Generative KI" und "Large Language Models" sind eine Technologie, bei der sich zunehmend abzeichnet, dass es nicht nur ein schräger Hype ist, sondern eine disruptive Technologie, die das Potential hat unsere Gesellschaft entscheidend zu verändern. Aus linksradikaler Perspektive müsste die Folgefrage sein: "verändert diese Technologie die Gesellschaft zum besseren, zum schlechteren oder ist das offen?" und darauf folgend "Falls zweiteres, was können wir dagegen tun und falls letzteres, wie können wir dagegen Einfluss nehmen?" Aber aktuell stellen sich linkspolitische Kontexte diese Fragen gar nicht. Mit der völligen Akzeptanz von Instagram und co (https://events.ccc.de/congress/2025/hub/de/event/detail/gesprachsrunde-zum-umgang-linksradikaler-und-anarc) scheinen linke Bewegungen jedoch völlig verlernt zu haben, kritisch über Technologien nachzudenken und zu diskutieren. In großen Teilen linker und anarchistischer Szene, findet zu dem Thema gerade keine Debatte statt, von Aktionen ganz zu schweigen. Vielleicht liegt es an einem Gefühl der Machtlosigkeit, dass man doch sowieso keinen Einfluss auf Entwicklung und Nutzung von Technologien hat? Aber das ist erwiesenermaßen falsch, man muss nur einen Blick auf die Kämpfe gegen Gentechnik, Atomkraft und Kohlekraft werfen. In allen Fällen konnte durch direkte Aktion nennenswert Einfluss genommen werden und zumindest die Dominanz dieser Technologien deutlich eingedämmt werden. Meine These, die ich als Grundannahme für diesen Workshop voraussetze: Es handelt sich hier um eine Technologie, die die Welt (und insbesondere das Internet) schlechter und nicht besser macht und es ist sinnvoll sie mit allen Mitteln die möglich sind zu bekämpfen. Vielleicht ist sie neben dem Klimawandel die größte Gefahr unserer Zeit. Deshalb wollen wir hier darüber diskutieren, was für Möglichkeiten für den Kampf gegen "KI" wir haben, welche Aktionsformen aus Anti-Gentechnik/Atomkraft/Kohle-Bewegung sich adaptieren lassen und welche nicht und wie wir endlich Bewusstsein in unsere politischen Kontexten dafür schaffen können, dass das fucking wichtig ist. Und bitte: die Grundannahme will ich in genau diesem Workshop nicht diskutieren. Gerne sonst immer, auch gerne in einer eigenen Session. Aber hier soll es um einen Austausch für Menschen gehen, die diese Grundannahme teilen. Und bitte: Keine Militanzdebatten. Sonst reden wir über nichts anderes. Auch Diversity of Tactics würde ich für die Debatte gerne als gegeben voraussetzen. Luna https://events.ccc.de/congress/2025/hub/event/detail/brainstorming-politischer-kampf-und-direkte-aktion false 2025-12-29T15:00:00+01:00 15:00 00:50 Shared Table 2 39c3-how-to-sos-schnittstelle-zwischen-openki-und-hub other Austauschrunde Wir wollen ermöglichen, dass Self organized Sessions über Openki organisiert werden können. Und ausprobieren wie das wäre. Kontext: Am internationalen antiautoritären Treffen in St.Imier in der Schweiz haben 2023 tausende Menschen Openki das erste mal genutzt und in Folge auch für den Congress vorgeschlagen. Die Argumente waren, dass auf Openki mehr Kollaboration und mehr Austausch stattfinden kann und dass Dialoge zu Themen auch weiter vor und nach dem Kongress passieren dürften. Leztes Jahr wurde es für die Organisation vom Håck ma's Castle https://sessions.hack-mas.at/ benutzt und hat einige zusätzliche Schnittstellen zu CCC infrastruktur bekommen. Nun testen wir es am Congress. Let's speak about it und lass uns mal probieren. https://events.ccc.de/congress/2025/hub/event/detail/how-to-sos-schnittstelle-zwischen-openki-und-hub false 2025-12-29T18:00:00+01:00 18:00 00:50 Shared Table 14 39c3-osint-with-open-politics-hq-practical-exploration- en, de other HQ is an open-source stack for annotating data with the help of LLMs. Using schemas written in natural language, items such as news articles or CSVs can be turned into dashboards that are easy to interpret, export, and audit. The aim is to help researchers apply their analytical frameworks to larger datasets with less effort. Because schemas are defined in natural language, the approach is accessible even without programming skills, giving many people a way to extract information directly. Whether you are doing keyword labelling, 1–10 rating scales, or graph triplets, the goal is to make it easier to conduct research, gather evidence, or simply organise data. This applies whether you are working with thousands of court documents, news articles, CSV datasets, or photos of receipts. More information and examples: \ https://github.com/open-politics/open-politics-hq \ https://docs.open-politics.org The workshop will focus on presenting existing analyses and developing new ones together. The objective is for participants to gain an understanding of the software and the analytical possibilities it enables. We are also interested in hearing your feature wish-list and, where appropriate, incorporating it into the project roadmap. We will conclude with an overview of our long-term vision, including where the tool is headed and what the next development steps will be. P.S. Although our project also involves extensive research on validating and de-biasing LLM-generated labels, this workshop will concentrate on the practical use of HQ. For methodological discussions about robustness, please contact engage@open-politics.org jxw https://events.ccc.de/congress/2025/hub/event/detail/osint-with-open-politics-hq-practical-exploration- false 2025-12-29T09:00:00+01:00 09:00 01:00 Stonewall IO (Saal Y 06) 39c3-inclusive-yoga-practice-body-diversity-by-default de Workshop Body diversity by default. This workshop is a shared exploration space aiming to perceive body, breath and emotion as a psychological safe space. We explore interoception, adaptive movement and sensing without judgement. Yoga becomes a tool for systemic change when it centers inclusion, questions appropriation and reshapes community. It is activism expressed through presence. We invite you to a slow, accessible practice designed to build mental strength and reclaim power through embodiment. We adjust poses to fit all needs and focus on a collective experience where everyone feels welcome by establishing inviting language and tools like consent cards, etc. Jamie https://events.ccc.de/congress/2025/hub/event/detail/inclusive-yoga-practice-body-diversity-by-default https://pretalx.c3voc.de/39c3-haecksen-workshops-2025/talk/AF3CE9/ https://pretalx.c3voc.de/39c3-haecksen-workshops-2025/talk/AF3CE9/feedback/ true 2025-12-29T10:30:00+01:00 10:30 01:30 Stonewall IO (Saal Y 06) 39c3-diy-laptop-music-instruments en Workshop long Write software programs in ChucK that take in laptop input (e.g. keyboard, trackpad, mic) and output sounds of your choosing! No experience required, but some familiarity with programming recommended. Required: macOS/windows/linux laptop and headphones. This workshop will enable participants to map different types of computer input to different parameters of sound (e.g. pitch, volume, sound effects). The focus here is on creating laptop instruments intended for live performance. We will use the ChucK programming language to do this. Imagine being able to create a fully-customizable synthesizer that you can run locally on your computer with your laptop keyboard, playing sound effects with a mouse click, or pitch-bending with your trackpad. No experience required, but some familiarity with programming is recommended. Everyone is welcome. Required: a macOS/windows/linux laptop and headphones, and an external mouse would be a nice-to-have. Tess https://events.ccc.de/congress/2025/hub/event/detail/diy-laptop-music-instruments https://pretalx.c3voc.de/39c3-haecksen-workshops-2025/talk/JFESPL/ https://pretalx.c3voc.de/39c3-haecksen-workshops-2025/talk/JFESPL/feedback/ true 2025-12-29T12:15:00+01:00 12:15 01:00 Stonewall IO (Saal Y 06) 39c3-packet-analysis-for-beginners-flinta-only en Workshop What can we learn from ordinary packets on the wire, using a disconcerting IoT toy ordered online as a demo device? How can you tell when something is phoning home? In this workshop, we’ll use Wireshark to observe what devices send and receive during regular operation Please download and install wireshark and the course material before you arrive! https://www.wireshark.org/download.html https://codeberg.org/katalyst/39c3-packet-analysis-workshop-material I will be around for an hour beforehand in the Haecksen Assembly if you need help with installing, but pls have the files downloaded. This workshop is for the curious! You don't need to know anything in advance. As stated in the title, the workshop is FLINTA only, katalyst https://events.ccc.de/congress/2025/hub/event/detail/packet-analysis-for-beginners-flinta-only https://pretalx.c3voc.de/39c3-haecksen-workshops-2025/talk/PEV3PU/ https://pretalx.c3voc.de/39c3-haecksen-workshops-2025/talk/PEV3PU/feedback/ true 2025-12-29T13:30:00+01:00 13:30 01:00 Stonewall IO (Saal Y 06) 39c3-haecksen-fur-nicht-haecksen de Workshop Habt ihr Fragen an die Haecksen, seit aber keine Haeckse oder könnt sogar keine Haeckse werden? Bringt sie mit, wir suchen die Antwort für eure Fragen. Dieser Workshop ist der Ort um komplizierte Fragen an die Haecksen zu stellen. Wir schauen die Fragen mit euch zusammen an und geben bei Möglichkeit eine Antwort. Für diese eine Stunde sind 'unbequeme' Fragen ok, unangemessenes Verhalten aber natürlich nicht. Sind die Haecksen wirklich der größte Chaostreff vom CCC mit ~1000 Mitgliedern? Was sind die Ziele der Haecksen? Wie kann man die Haecksen oder generell Gleichberechtigung unterstützen? Warum können zB. endo cis Männer keine Haecksen werden? Warum sind dann trotzdem die meisten Workshops der Haecksen für alle Wesen besuchbar? Diese Runde ist explizit an Menschen gerichtet, die sich nicht in FLINTA* wiederfinden können und damit keine unserer anderen Veranstaltungen besuchen können, in denen wir solche Fragen beantworten. Kommt gern vorbei, wir antworten vermutlich ;) melzai https://events.ccc.de/congress/2025/hub/event/detail/haecksen-fur-nicht-haecksen https://pretalx.c3voc.de/39c3-haecksen-workshops-2025/talk/UP7PVU/ https://pretalx.c3voc.de/39c3-haecksen-workshops-2025/talk/UP7PVU/feedback/ true 2025-12-29T14:45:00+01:00 14:45 02:00 Stonewall IO (Saal Y 06) 39c3-rust-programming-language-absolute-beginner-worksh en Workshop long Rust programming language: An absolute beginner workshop with intro presentation. Absolute beginner means “beginner in Rust” just as well as “beginner in programming”. Anyone interested can benefit from the introductory presentation, the exercises and our guidance, regardless of experience. **A heartfelt welcome!** We will hold a Rust workshop – FLINTA edition – for beginners. We will start with an introduction in the form of a lecture of about 45 minutes. This will be followed by a period of about 75 minutes (including a short break), during which you are going to work through exercises independently and at your own pace. We will help with any questions. We — and you — will be supported by the automated Rustlings course. Other experienced Rust developers will be on hand to help participants directly with questions during the workshop. Don't hold back: You are very welcome to ask questions during the workshop! **You will need:** - A laptop, prepared as described below, so we can get started right away. **Preparation** - Follow the instructions at **<https://rustlings.rust-lang.org/>** for the installation of Rust itself, as well as the interactive Rustlings course. - Also note the instructions for the editor and terminal. The integration with [**rust-analyzer**](https://rust-analyzer.github.io/) will make your Rust experience much more enjoyable! **Verify that your setup works ahead of time!** If you would like to receive help setting this up or verifying that your setup works well (especially if you use Windows), please come by our friendly Rust assembly or contact me directly. **Power supply** The workshop rooms at the venue might not be well prepared for work with many laptops: there might not be any power sockets at the tables. - Please bring your laptop fully charged. - If you can, then bring a long cable and multi-sockets, so you can provide yourself and others with electricity. **See you at the workshop — great to have you!** Leonie ([**@calisti@chaos.social**](https://chaos.social/@calisti)) calisti https://events.ccc.de/congress/2025/hub/event/detail/rust-programming-language-absolute-beginner-worksh https://pretalx.c3voc.de/39c3-haecksen-workshops-2025/talk/3CJBZE/ https://pretalx.c3voc.de/39c3-haecksen-workshops-2025/talk/3CJBZE/feedback/ true 2025-12-29T17:00:00+01:00 17:00 01:30 Stonewall IO (Saal Y 06) 39c3-haecksen-power-cycle-dezentralisieren-und-rebooten de Workshop long Haecksen only. Es ist an der Zeit dafür zu sorgen, dass wir mehr Engagement bei den Haecksen hinbekommen und das Wissen, wie alles funktioniert, schneller verteilen. Lasst uns die Struktur dezentralisieren und rebooten. Einzelne Personen tragen viele Hüte. Die gesamte Struktur wird durch wenige am Laufen gehalten. Gerade durch das Wachstum der letzten Jahre und die damit verbundene Größe von ~1000 Haecksen sollte dazu führen, dass die Last verteilt wird – und nicht einfach mehr Aufwand auf weiterhin wenigen Schultern verteilt wird. Die Haecksen sind keine reine remote Gruppe, aber auch keine, die nur offline tätig und sichtbar ist. Damit müssen wir einen guten Umgang finden, damit beide Bereiche gut miteinander funktionieren. Wir sind viele und unsere Existenz ist wichtig, Es ist an der Zeit die Haecksen neu zu strukturieren; beginnend bei der Kommunikation über die IT hin zu den Ortsgruppen. Sei es nun die Übernahme von mehr Verantwortung durch eine Verteilung der Verantwortung auf die Ortsgruppen oder einen anderen Ansatz. Es gibt einige Themen, die wir einmal bearbeiten müssen, um diese großartige und wichtige Struktur weiter zu verbessern. Lasst uns in diesem Workshop Verantwortung übernehmen und die bestehenden Strukturprobleme angehen und gemeinsam Maßnahmen zur Verbesserung erarbeiten. Am Anfang soll eine Themensammlung stattfinden, um zu erfassen, was es anzugehen gilt. Danach möchten wir in kleineren Arbeitsgruppen die ersten möglichen Maßnahmen definieren. Alles folgt dem Ziel, die Haecksen wieder voran zu bringen und zu einem Ort des Engagements zu machen – in dem die Verantwortung von vielen getragen wird. captain-maramo naerrin https://events.ccc.de/congress/2025/hub/event/detail/haecksen-power-cycle-dezentralisieren-und-rebooten https://pretalx.c3voc.de/39c3-haecksen-workshops-2025/talk/GA9PPQ/ https://pretalx.c3voc.de/39c3-haecksen-workshops-2025/talk/GA9PPQ/feedback/ true 2025-12-29T18:45:00+01:00 18:45 01:00 Stonewall IO (Saal Y 06) 39c3-how-to-barrieren-brechen-mit-open-data de Workshop Wir zeigen Alltagsbarrieren – und wie ihr helfen könnt, sie mit Open Data abzubauen. Nach einer kurzen Einstimmung zeigen wir, wie aus einzelnen Daten ein Gesamtbild für mehr Teilhabe entsteht und erfassen dann gemeinsam Orte auf dem Gelände. Komm ich mit einem Rollstuhl in das Café oder hat es Stufen? Wie kriege ich überhaupt mit, wo ich hin muss? Barrieren fallen oft erst auf, wenn man selbst davon betroffen ist - oder aber gelernt hat, auf sie zu achten. Deshalb starten wir mit einer kurzen Sensibilisierungsübung zum Thema Inklusion & Barrierefreiheit (nicht nur fürs Thema Mobilität). Anschließend zeigen wir euch einen „sozialen Algorithmus“, der Barrierefreiheit auf der Ebene von Stadtverwaltung, Politik und Aktivismus vorantreiben soll. Wir geben Einblick in die Entwicklung unseres Projekts a11y-Score, welches vom Bundesministerium für Verkehr (BMV) im Rahmen der mFund-Initiative gefördert wird. Weiter geht's mit einer Einführung in die Wheelmap: einer offenen Karte (basierend auf OpenStreetMap), mit der Menschen weltweit Zugänglichkeit dokumentieren können - auch für den vorgestellten Algorithmus. Nach dem Workshop gehen / rollen wir in Gruppen über das Gelände und probieren das ganze konkret vor Ort aus. Zum Abschluss bleibt Zeit für Fragen, Austausch und Ideen. Lasst uns gemeinsam die Welt zugänglicher machen - one data entry at a time! ✊ Wheelmap: https://wheelmap.org a11y-Score: https://a11yscore.org Falls ihr als Teilnehmer*innen eine Sinneseinschränkung, Behinderung oder ein bestimmtes Bedürfnis habt, lasst uns das gern vorab [per Mail](mailto:info@wheelmap.org) wissen. Wir versuchen dann, gemeinsam dafür zu sorgen, dass alle auf dem gleichen Level mitmachen können. Luise Bruche Sebastian Felix Zappe Lynn Janzen https://events.ccc.de/congress/2025/hub/event/detail/how-to-barrieren-brechen-mit-open-data https://pretalx.c3voc.de/39c3-haecksen-workshops-2025/talk/FPMSKP/ https://pretalx.c3voc.de/39c3-haecksen-workshops-2025/talk/FPMSKP/feedback/ true 2025-12-29T20:00:00+01:00 20:00 01:00 Stonewall IO (Saal Y 06) 39c3-austauschrunde-wie-kann-online-dating-in-einem-dat de Workshop Ich habe keine Lösungen, möchte aber einen Raum für Austausch schaffen. Diese Austauschrunde ist vielleicht für dich interessant, wenn du dich hierdurch angesprochen fühlst: - Du willst gern einen neuen Menschen kennenlernen, möchtest aber in deinem Tempo und selbstbestimmt entscheiden, wann du welche Informationen über dich in einem Kennenlernprozess teilst? - Du möchtest nicht, dass deine Daten kommerziell genutzt werden? - Aktuell bestehende Dating-Apps fühlen sich für dich nicht nach einem Safe Space an? - Du möchtest gern die Vorteile von Online-Dating nutzen, z.B. weil du schüchtern bist oder eine Lebenssituation hast, in der du wenig neue Menschen kennenlernen kannst? - Du möchtest dich mit anderen austauschen und erwartest dabei keine "fertigen Lösungen"? Die Austauschrunde richtet sich an Personen, die aktuell gern einen neuen Menschen kennenlernen möchten. Es ist aber KEIN SPEED-DATING, sondern es geht um einen inhaltlichen Austausch, z.B. auf persönlicher, gesellschaftlicher, gern auch technischer Ebene. Die Austauschrunde ist für Menschen ab 18 Jahren, denen ein wertschätzender und rücksichtsvoller Austausch zum Thema wichtig ist. Okapi https://events.ccc.de/congress/2025/hub/event/detail/austauschrunde-wie-kann-online-dating-in-einem-dat https://pretalx.c3voc.de/39c3-haecksen-workshops-2025/talk/KWC79V/ https://pretalx.c3voc.de/39c3-haecksen-workshops-2025/talk/KWC79V/feedback/ true 2025-12-29T21:15:00+01:00 21:15 02:00 Stonewall IO (Saal Y 06) 39c3-pub-quiz-fur-nicht-nerds de Workshop Ein nerdiges Pub-Quiz -- mit Fragen nach Wissen aus den Bereichen "Allgemein-Wissen", "Pop-Kultur" und "Diversität und Inklusion". Das Quiz ist offen für alle. Wir stellen hauptsächlich lustig-interessante Fragen. Es gibt keine Fragen nach "Nerd-Credibility". Du kennst keine DIN-Normen? Sammelst und behebst keine Software-Bugs? Um Viren kümmerst du dich mit Desinfektionsmittel? Dann bist du bei uns richtig. Wir quizzen uns durch Geographie, Geschichte, Filme und Serien -- immer mit einem Blick auf Diversität und Inklusion. Wir versuchen, schwierige Themen (z.B. Gewalt, Diskriminierung, etc.) zu vermeiden bzw. sensibel zu behandeln. pascoda lavalaempchen https://events.ccc.de/congress/2025/hub/event/detail/pub-quiz-fur-nicht-nerds https://pretalx.c3voc.de/39c3-haecksen-workshops-2025/talk/BDZU8H/ https://pretalx.c3voc.de/39c3-haecksen-workshops-2025/talk/BDZU8H/feedback/ true 2025-12-29T23:30:00+01:00 23:30 01:30 Stonewall IO (Saal Y 06) 39c3-riot-pub-quiz de Evening Event (open end) 60-120 min 20 Fragen und Teams von 2-6 Personen. Das Typische Pub Quiz eben. Wir stellen Fragen und ihr Schreibt die Antworten auf einen Zettel. Das Team mit den meisten richtigen Antworten gewinnt einen kleinen Preis. Themengebiete alles Rund um Demos, Riots und Linke Kultur. Bei einem Pub Quiz bildet man ein kleines Team mit einem lustigen Namen. Dann gibt es hintereinander Fragen. Mal sind es Schätzfragen, mal der Name einer Gruppe, der Name eines Liedes oder eine kleine Anekdote zu einem kurzen Videoausschnitt oder Bild. Für die Beantwortung jeder Frage gibt es dann etwa eine Minute Zeit und am Ende muss der Zettel mit den Lösungen abgegeben werden. Diesen kontrollieren wir dann und Küren dann das Team mit dem meisten Riot Wissen. Ein Spaß für die ganze Bezugsgruppe. Lethe captain-maramo Lucy https://events.ccc.de/congress/2025/hub/event/detail/riot-pub-quiz https://pretalx.c3voc.de/39c3-haecksen-workshops-2025/talk/MAUE9B/ https://pretalx.c3voc.de/39c3-haecksen-workshops-2025/talk/MAUE9B/feedback/ true 2025-12-29T15:00:00+01:00 15:00 02:00 SoS 39c3-traditionelles-haecksen-picknick de Workshop long Traditionelles Haecksen-Picknick für bereits beigetretene Haecksen EN: Traditional Haecksen picnic for existing Haecksen members Jedes Jahr treffen wir uns zum traditionellen Haecksen-Picknick auf dem Congress, tauschen uns aus und planen das nächste Jahr. Hinweis: Dieses Picknick ist nicht gedacht für die Aufnahme von Neuhaecksen. Falls ihr den Haecksen beitreten möchtet, besucht bitte das Picknick an Tag 2 um 14 Uhr als Erstes! EN: Every year, we meet for the traditional Haecksen picnic at the Congress, exchange ideas and plan for the coming year. Note: This picnic is not intended for the admission of new Haecksen. If you would like to join the Haecksen, please attend the picnic on day 2 at 2 p.m. as your first event! https://events.ccc.de/congress/2025/hub/event/detail/traditionelles-haecksen-picknick https://pretalx.c3voc.de/39c3-haecksen-workshops-2025/talk/ZE9R3T/ https://pretalx.c3voc.de/39c3-haecksen-workshops-2025/talk/ZE9R3T/feedback/ false 2025-12-29T13:00:00+01:00 13:00 02:30 Art & Play: Bus Stage 39c3-pony-pracht-nina-bendix-igleses-water-to-voice-mee other „Water to Voice“ ist ein sich ständig weiterentwickelndes Werk, das aus dem Prozess des Klonens von Lisas Stimme entstanden ist. Der Fluss und die Bewegung des Wassers steuern und lösen die Stimme aus und schaffen so ein einzigartiges Zusammenspiel zwischen den beiden Elementen. Es fängt die Stimme mitten in ihrem Trainingsprozess ein – wie sie sich verändert, stolpert und neu interpretiert. Während sich das Wasser bewegt, formt und unterbricht es den Klang und verwandelt die Bewegung der Flüssigkeit in eine stimmliche Geste. Das Ergebnis ist weder rein menschlich noch rein künstlich, sondern etwas dazwischen – lebendig, instabil und sich ständig verändernd. „Water to Voice“ wird zu einem Dialog zwischen Natur und Technologie, einer fragilen Choreografie, in der die Stimme in Echtzeit lernt, ins Stocken gerät und sich weiterentwickelt. »Water to Voice« is an evolving piece born from the process of cloning Lisa’s voice. The flow and movement of water control and trigger the voice, creating a unique interplay between the two elements. It captures the voice in the midst of its training—shifting, stumbling, reinterpreting itself. As the water moves, it shapes and disrupts the sound, transforming liquid motion into vocal gesture. What emerges is neither purely human nor purely artificial, but something in between—alive, unstable, and constantly transforming. »Water to Voice« becomes a dialogue between nature and technology, a fragile choreography in which the voice learns, falters, and evolves in real time. #### Artist Bio: The duo Lisa L. Zwinzscher & Nina Bendix Igleses (Leipzig/Weimar) explores the boundaries of listening and voice in the digital realm. Emerging from Lisa L. Zwinzscher’s solo project Pony Pracht, which blends music with interactive, game-inspired visuals, her work expands to questions of identity and authenticity in the age of AI. As a singer, she has cloned her own voice, transforming it into a human-artificial live instrument. Fascinated by the tactile, sonic and metaphorical qualities of water, Nina Bendix Igleses approaches listening as a multisensory practice of relating to the world, investigating interconnection within and between self and environment. Together, they engage with questions of identity, resonance, and transformation, creating sonic environments that explore what it means to be human. [ponypracht.com](https://ponypracht.com) [ninabendixigleses.com](https://ninabendixigleses.com) Marty https://events.ccc.de/congress/2025/hub/event/detail/pony-pracht-nina-bendix-igleses-water-to-voice-mee false 2025-12-29T15:30:00+01:00 15:30 00:30 Art & Play: Bus Stage 39c3-pony-pracht-nina-bendix-igleses-water-to-voice-liv other „Water to Voice“ ist ein sich ständig weiterentwickelndes Werk, das aus dem Prozess des Klonens von Lisas Stimme entstanden ist. Der Fluss und die Bewegung des Wassers steuern und lösen die Stimme aus und schaffen so ein einzigartiges Zusammenspiel zwischen den beiden Elementen. Es fängt die Stimme mitten in ihrem Trainingsprozess ein – wie sie sich verändert, stolpert und neu interpretiert. Während sich das Wasser bewegt, formt und unterbricht es den Klang und verwandelt die Bewegung der Flüssigkeit in eine stimmliche Geste. Das Ergebnis ist weder rein menschlich noch rein künstlich, sondern etwas dazwischen – lebendig, instabil und sich ständig verändernd. „Water to Voice“ wird zu einem Dialog zwischen Natur und Technologie, einer fragilen Choreografie, in der die Stimme in Echtzeit lernt, ins Stocken gerät und sich weiterentwickelt. »Water to Voice« is an evolving piece born from the process of cloning Lisa’s voice. The flow and movement of water control and trigger the voice, creating a unique interplay between the two elements. It captures the voice in the midst of its training—shifting, stumbling, reinterpreting itself. As the water moves, it shapes and disrupts the sound, transforming liquid motion into vocal gesture. What emerges is neither purely human nor purely artificial, but something in between—alive, unstable, and constantly transforming. »Water to Voice« becomes a dialogue between nature and technology, a fragile choreography in which the voice learns, falters, and evolves in real time. #### Artist Bio: The duo Lisa L. Zwinzscher & Nina Bendix Igleses (Leipzig/Weimar) explores the boundaries of listening and voice in the digital realm. Emerging from Lisa L. Zwinzscher’s solo project Pony Pracht, which blends music with interactive, game-inspired visuals, her work expands to questions of identity and authenticity in the age of AI. As a singer, she has cloned her own voice, transforming it into a human-artificial live instrument. Fascinated by the tactile, sonic and metaphorical qualities of water, Nina Bendix Igleses approaches listening as a multisensory practice of relating to the world, investigating interconnection within and between self and environment. Together, they engage with questions of identity, resonance, and transformation, creating sonic environments that explore what it means to be human. [ponypracht.com](https://ponypracht.com) [ninabendixigleses.com](https://ninabendixigleses.com) https://events.ccc.de/congress/2025/hub/https://usercontent.events.ccc.de/congress/2025/hub/usercontent/e/c120882d33da/1280-959-max.jpg Marty https://events.ccc.de/congress/2025/hub/event/detail/pony-pracht-nina-bendix-igleses-water-to-voice-liv false 2025-12-29T20:30:00+01:00 20:30 01:00 Art & Play: Bus Stage 39c3-xl-noisy-improvised-concert-on-analogdigital-modul other Improvisierte elektronische Musik auf einem hybriden Setup, bestehend aus einem kleinen modularen System und digitalen Komponenten, die in Pure Data programmiert sind. Der Fokus liegt auf der musikalischen Erforschung roher elektronischer Klänge ohne den Einsatz von Echo, Hall oder Loopern. Auch wenn es rhythmische Momente geben mag, stehen diese nicht im Mittelpunkt, ebenso wenig wie Harmonie und Melodie – vielmehr sind technische/mathematische Strukturen die Ausgangspunkte. Die ästhetische Anziehungskraft entsteht durch die Akzeptanz des Klangmoments als kognitive Erfahrung und die gemeinsame Wahrnehmung eines Spannungsbogens durch Publikum und Performer*in. Improvised electronic music on a hybrid setup consisting of a small modular system and digital components programmed in Pure Data. The focus is on the musical exploration of raw electronic sounds without the use of echoes, reverb, or loopers. Even though there may be rhythmic moments, these are not the focus, nor are harmony and melody—rather, technical/mathematical structures are the starting points. The aesthetic appeal arises from the acceptance of the sound moment as a cognitive experience and the shared perception of a tension arc by the audience and performer. #### Artist Bio: i am an electronic/experimental musician, composer, improviser, programmer based in leipzig/germany. after more than 3 decades as a professional musician and instrumental teacher in various styles and on various traditional instruments, i have become a little bored and saturated with it. in addition, i have felt the desire to devote my life to other tasks such as left wing political, activist work and exploring the social space. therefore i have decided to stop making traditional music and to focus musically on improvisation and electronic sound generation. this allows me to combine some strong interests - for example, exploring sounds, computer programming, electronic tinkering - and use them for my artistic work. i play live with a small modular system as well as with self-developed digital, computer-based instruments and controllers. in addition to ensemble improvisation, i am increasingly interested in solo performances. through my long time as a wind instrumentalist i have become accustomed to always using my breath for articulation and dynamic control. that's why i usually use a breath controller for my electronic performances. in this concert i expect to use an eurorack-modular in combination with pure data & supercollider https://events.ccc.de/congress/2025/hub/https://usercontent.events.ccc.de/congress/2025/hub/usercontent/e/727d9d3de403/1120-700-max.jpg Marty https://events.ccc.de/congress/2025/hub/event/detail/xl-noisy-improvised-concert-on-analogdigital-modul false 2025-12-29T22:30:00+01:00 22:30 01:30 Art & Play: Bus Stage 39c3-traumtaucher de, en other Der Theatertechniker Elias baut zusammen mit seinen Freunden ein voll funktionsfähiges Steampunk-U-Boot. Während Nico Menschen aus den Wellen des Mittelmeers rettet, rät der 70-jährige Künstler Jim: „Tu es nicht. Repariere keine Autos, sondern mach lieber etwas im Leben, was du wirklich willst.“ Elias fragt sich: Muss man sich zwischen Selbstverwirklichung und selbstlosem Handeln entscheiden? Wovon hängt die Verantwortung gegenüber Einzelpersonen oder der Gesellschaft insgesamt ab? **Artist: Christoph Fleischer** **Genre: Documentary, 92 min** *DE with EN subtitles, 2024* Theatre engineer Elias builds a fully functional steampunk submarine together with his friends. While Nico rescues people from the waves of the Mediterranean, the 70-year-old artist Jim advises: ”Don‘t do it. Don’t fix cars, but rather do something in life that you really want to”. Elias asks himself: Is there a decision to be made between self-realization and selfless-action? Upon what does responsibility towards individuals or larger society depend? ABOUT WATER AND DREAMS is a philosophical journey that questions the meaningfulness of our actions and dares to dream publicly in our dreamless society. Documentary film about the submarine project presented at 37C3 with a lecture. Lecture - “How to build a submarine and survive” by Elias and Nico [www.traumtaucher-film.de](www.traumtaucher-film.de) [www.tiefenruder.de](www.tiefenruder.de) Picture: Traumtaucher ©Christoph Fleischer https://events.ccc.de/congress/2025/hub/https://usercontent.events.ccc.de/congress/2025/hub/usercontent/e/309857a8358f/1080-1080-max.jpg Marty https://events.ccc.de/congress/2025/hub/event/detail/traumtaucher false 2025-12-29T10:30:00+01:00 10:30 02:00 CDC Triangle 39c3-getting-started-with-the-pocket-science-lab en Workshop In this self-paced workshop we will learn how to use the instruments of the Pocket Science Lab (PSLab) board, with the Python API and the Android app. Learn how to use the PSLab's range of onboard instruments to make measurements and output control signals. This workshop will walk you through how to: - Measure voltage and resistance using the multimeter - Measure time-series voltage with the oscilloscope - Measure time-series digital signals with the logic analyzer - Output variable voltage with the signal generator - Output digital signals with the PWM generator Choose between using the Python API or the Android application, or both! Alexander Bessman https://events.ccc.de/congress/2025/hub/event/detail/getting-started-with-the-pocket-science-lab https://pretalx.riat.at/39c3/talk/RPPFJF/ false 2025-12-29T13:00:00+01:00 13:00 00:15 CDC Triangle 39c3-indoor-ballooning-with-antennas en Workshop We meet indoors at CDC Circle and go outside to launch some comms infrastructure on a tethered balloon. As every Star Trek fan knows, humans are "ugly bags of mostly water" [S1E18] so RF communication in areas densely packed with humans - or their infrastructure made of metal and stone - is problematic. We'll explore ideas to overcome or mitigate this problem, ideas that are possible due to miniaturisation of RF devices and their constraints. Humans are ugly bags of mostly water and they and their infrastructure attenuate the RF signals we need for communication. We'll explore concepts that are possible due to miniaturisation of RF devices and their constraints. In the end we'll raise a tethered balloon with Meshcore and a Reticulum node indoors or - depending on the situation - outdoors and playfully check the range we can achieve. We'll discuss - what we trying to achieve / the problem at hand - the physical, electrical and financial constraints of our solution compared to other approaches - what changed, why can we do this in 2025 but not in 2015? In the end we'll raise a tethered balloon with Meshcore and a Reticulum nodes indoors or - depending on the situation - outdoors and playfully check the height and range we can achieve. This is a fun workshop that wants to encourage people to play with compact yet easily deployable communication infrastructure, there will be some basic maths and diagrams, but nothing intimidating. https://pretalx.riat.at/media/39c3/submissions/3MUCCG/Screenshot_2025-12-22_at_14.20.04_tY4WY8C.png chris https://events.ccc.de/congress/2025/hub/event/detail/indoor-ballooning-with-antennas https://pretalx.riat.at/39c3/talk/3MUCCG/ false 2025-12-29T13:15:00+01:00 13:15 00:15 CDC Triangle 39c3-state-of-the-decentralization-in-industry en Talk Come hear about how decentralization is used and viewed in commercial projects, and how you can make a difference in real-world adoption. Open-source is fun and exciting, but it often gets relegated to 'hobby', but there are industry applications. Come learn about various businesses that use open-source libraries every day, and how you can turn your open-source contributions into work, lifestyle, or even changing the world. Diego Salazar https://events.ccc.de/congress/2025/hub/event/detail/state-of-the-decentralization-in-industry https://pretalx.riat.at/39c3/talk/9LHGTD/ false 2025-12-29T13:30:00+01:00 13:30 00:30 CDC Triangle 39c3-the-cdc-badge-conference-badge-devboard-with-_420t en Talk Electronic conference badge & devboard by the Critical Decentralization Cluster with: • TROPIC01 secure element • ESP32-S3 microcontroller • e-paper display with frontlight • battery charging IC and LiPo battery • 12-button keypad • Lots of IO: RasPi header, Grove, SAO https://github.com/riatlabs/cdc-badge dllud bobotronic https://events.ccc.de/congress/2025/hub/event/detail/the-cdc-badge-conference-badge-devboard-with-_420t https://pretalx.riat.at/39c3/talk/UKSKJF/ false 2025-12-29T14:00:00+01:00 14:00 01:00 CDC Triangle 39c3-talk-with-industry-cryptographers-and-developers en other Real-world industry cryptographers and developers working on open-source projects, codebases, and research sit down to listen and answer your questions about how they got started, what they're doing, and how they make a difference. Diego Salazar https://events.ccc.de/congress/2025/hub/event/detail/talk-with-industry-cryptographers-and-developers false 2025-12-29T15:00:00+01:00 15:00 00:30 CDC Triangle 39c3-leveraging-llms-for-preventing-de-anonymization-oc en Talk Personal data leaks can happen to the best of us. A unique development in machine learning gives us the opportunity to catch lapses before they're passed on for the world to see. This talk covers how Occlumask works and its developments so far. Have you ever mentioned the weather? Maybe offhandedly complained about mosquitoes? Then you may have inadvertently given away crucial bits of who you are and where you are. Occlumask is a new tool for detecting content-based anonymity leaks like this, utilizing the capabilities of large language models to provide more accurate 'coverage'. Come and learn about the reasoning behind Occlumask's development, and the various considerations that had to be made during its development. Topics covered in this talk: * How does this work fill a gap in the broader anonymity tool context of Tor, stylometry, etc? * Background of content-based data-leak prevention tools. * What is Occlumask and how does it work? * Why use an LLM for this? * Unique challenges faced by using an LLM. https://pretalx.riat.at/media/39c3/submissions/UWJ8XB/namecoin-coin_YUI8Kw0.svg Alice Margatroid https://events.ccc.de/congress/2025/hub/event/detail/leveraging-llms-for-preventing-de-anonymization-oc https://pretalx.riat.at/39c3/talk/UWJ8XB/ false 2025-12-29T15:30:00+01:00 15:30 02:00 CDC Triangle 39c3-occlumask-demo-brainstorming-session en Workshop Come and experience Occlumask in action! We want to make sure Occlumask can stand up to whatever situations you might find yourself in. Enter your own text and see if Occlumask can tell whether you're doxing yourself, and suggest what kinds of information Occlumask should be able to detect and notify you of. Occlumask still has a long development ahead of it, and we want Occlumask to be as comprehensive as possible when it comes to detecting potential content-based data-leaks. In this workshop, we will be demoing a prototype of Occlumask for you to try. Alongside this, we will be asking how you would likely be using Occlumask, and what you think Occlumask should do for you. Come if you have ideas on: * What information do you consider important/sensitive? * What kinds of situations should Occlumask be able to handle? https://pretalx.riat.at/media/39c3/submissions/MWLGQW/namecoin-coin_PWGCffn.svg Jeremy Rand Alice Margatroid https://events.ccc.de/congress/2025/hub/event/detail/occlumask-demo-brainstorming-session https://pretalx.riat.at/39c3/talk/MWLGQW/ false 2025-12-29T17:30:00+01:00 17:30 00:30 CDC Triangle 39c3-sockstrace-preventing-proxy-leaks-in-your-applicat en Talk When building privacy-sensitive applications, we often rely on proxies like Tor to ensure that no direct connections escape the intended anonymity network. However, verifying that every part of an application reliably goes through the proxy is surprisingly difficult. Even a single syscall escaping the proxy path can quietly deanonymize a user. SocksTrace is a lightweight proxy-leak detection tool that traces network-related syscalls and validates whether they correctly route through the configured proxy. In this talk, I’ll show how SocksTrace works under the hood, what kinds of leaks it can catch, and why syscall-level inspection is essential for high-assurance privacy tools. I’ll also walk through real-world findings: during our testing, we identified previously unknown proxy leaks in major browsers including Firefox and Brave, one of which resulted in a confirmed bug bounty. These results highlight how subtle proxy routing mistakes can occur even in widely-used, privacy-oriented software. SocksTrace is a Linux-based proxy leak detector and traffic proxifier built on seccomp-notify. By intercepting network syscalls directly in the kernel, it provides runtime-agnostic visibility and enforcement that works even for statically linked binaries and modern browsers. The talk showcases real WebRTC-related proxy leaks discovered using SocksTrace, explains shortcomings of traditional tools, and demonstrates transparent SOCKSification, DNS enforcement, and safe handling of applications that launch their own Tor instances. We conclude with practical use cases and future directions for syscall-level network containment. Robert Mindo https://events.ccc.de/congress/2025/hub/event/detail/sockstrace-preventing-proxy-leaks-in-your-applicat https://pretalx.riat.at/39c3/talk/AEQPXC/ false 2025-12-29T18:00:00+01:00 18:00 00:30 CDC Triangle 39c3-qaul-decentralized-off-the-grid-mesh-communication en Talk qaul is a P2P mesh communication app, with a strong focus on privacy and usability. Every user is identified via their self-sovereign cryptographic identity. It not only communicates P2P, but builds a mesh network, interconnecting multiple communication such as BLE (Bluetooth Low Energy), Local Area Networks, and Internet overlay links. The messaging app has an automated user discovery, end-to-end encrypted direct messaging and group chats for text, voice-messages and files, as well as public communication channels. https://qaul.net https://pretalx.riat.at/media/39c3/submissions/VG7YRC/qaul-splash_IhPhsvk.jpg Mathias https://events.ccc.de/congress/2025/hub/event/detail/qaul-decentralized-off-the-grid-mesh-communication https://pretalx.riat.at/39c3/talk/VG7YRC/ false 2025-12-29T18:30:00+01:00 18:30 00:30 CDC Triangle 39c3-decentralized-syndication-the-missing-internet-pro en Workshop The Internet is decentralized by design. It came into being not at once, but in parts.  New protocols were added on top of previous ones, with each new protocol extending and improving functionality of the global network. However one essential protocol is still missing  —  an open way to discover and publish content on the global web. I have implemented a conceptual decentralized content sydication platform and would like to tell more about the philosophy behind it. The workshop will consist of two parts: 30 min presentation about the concept and 30 min workshop where participants would try to publish their social post on RSDS network. Tautvilas Mečinskas https://events.ccc.de/congress/2025/hub/event/detail/decentralized-syndication-the-missing-internet-pro https://pretalx.riat.at/39c3/talk/DVEGM7/ false 2025-12-29T19:00:00+01:00 19:00 00:30 CDC Triangle 39c3-a-brief-history-of-keeping-secrets en Talk We walk from ancient Roman times to modern day, discussing the general advancement of applied cryptography across history. We begin with the Caesar cipher, fast forward to the World Wars of the early 20th century, before moving onto the rise and fall of elliptic curve cryptography, including Monero's past, present, and future protocol design philosophy. This talk is informal, intended as a primer for the historically-minded. Brandon Goodell https://events.ccc.de/congress/2025/hub/event/detail/a-brief-history-of-keeping-secrets https://pretalx.riat.at/39c3/talk/ZKYJ8N/ false 2025-12-29T19:30:00+01:00 19:30 01:00 CDC Triangle 39c3-pre-quantum-to-post-quantum-cryptography en other Quantum computers represent a looming threat to much of the critical foundations of modern cryptography. Post-quantum cryptography (PQC) utilizes hard mathematical problems that we believe resist the so-called "quantum advantage," to preserve security and privacy. In this workshop we will unpack the principles behind the leading PQC families such as lattice and code based constructions, then showcase their implications for cryptocurrencies, digital signatures, and zero-knowledge protocols. Freeman Slaughter https://events.ccc.de/congress/2025/hub/event/detail/pre-quantum-to-post-quantum-cryptography false 2025-12-29T20:30:00+01:00 20:30 00:30 CDC Triangle 39c3-be-bop-ethical-commerce-without-the-middlemen en Talk [be-BOP](https://be-bop.io/) is free and open-source software for **autonomous commerce**. It’s an all-in-one, batteries-included solution built for merchants, not engineers. It lets communities run markets without accounts, tracking, or gatekeepers. From shops to restaurants, ticketing to peer-funding — all self-hosted. Adoption grows among merchants and creators seeking real independence. Next steps: **multitenant** for specialization, **cross be-BOP** for **federation**. We’re building the foundations of a free, federated economy. **be-BOP is free and open-source software for sovereign commerce.** It’s built on a simple belief: merchants and communities should own the tools they depend on. We design technology that respects privacy, rejects dark patterns, and removes the need for accounts or intermediaries. Our vision is trade without platforms, data brokers, or gatekeepers — commerce as a public good, not a private empire. Unlike fragmented “self-commerce” tools, **be-BOP is a complete, batteries-included stack**. It supports e-commerce, point-of-sale, restaurant systems, ticketing, peer-funding, and subscriptions — all self-hosted, interoperable, and designed for real-world merchants. It aims for the reliability of a platform, without the capture of one. Adoption grows from the edges: merchants and cooperatives seeking independence, and creators tired of surrendering revenue to platforms. In **Goma**, communities use be-BOP to organize resources and stabilize local economies under pressure. Elsewhere, artists use it to sustain open culture without permission or lock-in. The roadmap pushes beyond software. **Multitenant be-BOP** will enable domain-specific ecosystems — tailor-made for farmers’ markets, repair collectives, or independent venues — while **cross be-BOP** will link autonomous nodes into a federation of mutual visibility. Together they answer the twin failures of centralized commerce: loss of agency and isolation. be-BOP aspires to be more than a toolchain. It’s an experiment in rebuilding economic infrastructure on open terms — a foundation for **free, federated, and sustainable digital economies** that can’t be quietly “enshittified.” Roos https://events.ccc.de/congress/2025/hub/event/detail/be-bop-ethical-commerce-without-the-middlemen https://pretalx.riat.at/39c3/talk/ZGADCJ/ false 2025-12-29T21:00:00+01:00 21:00 00:30 CDC Triangle 39c3-applying-cryptoanarchy-in-individual-and-communal- en Talk Proprietary tech from corporations and surveillance from governments never been more pervasive and it's becoming impossible to deflect it's patterns of control. Refuse the captured system and opt out into the parallel one, embracing FOSS, decentralization and freedom. Let's explore technologies we can use as an actual tools without serving third parties, building independent community coordination and distributed systems that cannot be controlled. Join us to share your stack and tips on surviving without proprietary technologies, banks and big brothers as an individual and a hackerspace. Mario https://events.ccc.de/congress/2025/hub/event/detail/applying-cryptoanarchy-in-individual-and-communal- https://pretalx.riat.at/39c3/talk/XPN8AE/ false 2025-12-29T21:30:00+01:00 21:30 01:30 CDC Triangle 39c3-on-the-limits-of-decentralization en Workshop A collaborative dialogue to examine and unsettle the philosophical foundations of decentralization. What do we actually mean when we speak of decentralization, and what forms of order, asymmetry or coordination quietly sustain it? Where does decentralization end and centralization begin, and is this opposition as clear as it appears? Beyond familiar binaries such as order and chaos, what assumptions are embedded in the formal systems, protocols and narratives we rely on? What do participants experience when engaging with institutions, infrastructures or rulesets, and what recedes into the background as those systems operate? Through a self-reflective and performative inquiry, this dialogue explores decentralization not as a moral absolute but as a situated and contested design space shaped as much by what it excludes as by what it enables. In its iterative, by now familiar format, the workshop opens with a short framing by the facilitator, introducing the inquiry and reflecting on the asymmetry of facilitation itself and its relevance to decentralization. Participants then break into smaller groups to explore the questions raised, with room for divergence, contestation and parallel lines of inquiry. The format remains intentionally open to shifts in attention, authority and coordination as the session unfolds. We reconvene toward the end to share reflections, tensions and unresolved questions rather than to converge on a single conclusion. The workshop invites participants to engage not only with ideas of decentralization but with how those ideas are enacted, sustained or resisted in practice. Ome https://events.ccc.de/congress/2025/hub/event/detail/on-the-limits-of-decentralization https://pretalx.riat.at/39c3/talk/WWSYUL/ false 2025-12-29T12:00:00+01:00 12:00 00:30 Saal 5 39c3-nudeln-hacken-hacking-noodles-2_rkeb de Talk Wettbewerb für Junghackerinnen von 5 Jahren bis 1000 Spaß am Gerät: Mehrere Teams bauen gleichzeitig mit Nudeln um die Wette. Dabei geht es um kreativen Umgang mit Technik und die Erfahrung, dass man Dinge auch jenseits der eigentlichen Verwendungszwecke gut gebrauchen kann. Junghacker bzw. solche die es werden wollen, können alleine oder als Team kommen. Es kann jeder mitmachen, der weiß, was eine Nudel ist. PS: Es werden keine Lebensmittel verschwendet. PPS: Erwachsene dürfen auch mitmachen, wenn sie den Junghacker keinen Platz wegnehmen. Sie werden aber wahrscheinlich gegen den Nachwuchs verlieren :-D StefanH https://events.ccc.de/congress/2025/hub/event/detail/nudeln-hacken-hacking-noodles-2_rkeb https://pretalx.chaos.jetzt/jugend/talk/MRD3QB/ https://pretalx.chaos.jetzt/jugend/talk/MRD3QB/feedback/ false 2025-12-29T12:30:00+01:00 12:30 01:00 Saal 5 39c3-jugend-hackt-stickpatch-mit-led_thv4 de Workshop Bring Dein Jugend hackt-Stickpatch mit einer Farbwechsel-LED zum Leuchten. Du bekommst ein farbintensives Patch mit 39C3- und Jugend hackt-Motiv. Auf der Rückseite stattest Du es mit einem Batteriehalter aus und auf der Vorderseite mit einer LED, um einen schönen Leuchteeffekt zu erzielen. Wenn Du möchtest, kannst Du Dein Patch mithilfe von Druckknöpfen auf einem Stoffbeutel befestigen und auf dem Congress und überall sonst zeigen. Vorkenntnisse sind nicht erforderlich. Wir freuen uns auf Dich! https://pretalx.chaos.jetzt/media/jugend/submissions/ULXDWH/39C3-Stickpatch-Jugendhackt2_JRcbLiD_g24j496.jpeg anma https://events.ccc.de/congress/2025/hub/event/detail/jugend-hackt-stickpatch-mit-led_thv4 https://pretalx.chaos.jetzt/jugend/talk/ULXDWH/ https://pretalx.chaos.jetzt/jugend/talk/ULXDWH/feedback/ false 2025-12-29T13:30:00+01:00 13:30 00:30 Saal 5 39c3-nudeln-hacken-hacking-noodles-2_pooi de Talk Wettbewerb für Junghackerinnen von 5 Jahren bis 1000 Spaß am Gerät: Mehrere Teams bauen gleichzeitig mit Nudeln um die Wette. Dabei geht es um kreativen Umgang mit Technik und die Erfahrung, dass man Dinge auch jenseits der eigentlichen Verwendungszwecke gut gebrauchen kann. Junghacker bzw. solche die es werden wollen, können alleine oder als Team kommen. Es kann jeder mitmachen, der weiß, was eine Nudel ist. PS: Es werden keine Lebensmittel verschwendet. PPS: Erwachsene dürfen auch mitmachen, wenn sie den Junghacker keinen Platz wegnehmen. Sie werden aber wahrscheinlich gegen den Nachwuchs verlieren :-D StefanH https://events.ccc.de/congress/2025/hub/event/detail/nudeln-hacken-hacking-noodles-2_pooi https://pretalx.chaos.jetzt/jugend/talk/VE9B8K/ https://pretalx.chaos.jetzt/jugend/talk/VE9B8K/feedback/ false 2025-12-29T20:00:00+01:00 20:00 01:00 Saal 5 39c3-antifa-recherche-meetup_ijap de, en other Machst du (antifaschistische) Recherche Arbeit? hast du OSINT Kompetenzen? kennst du dich mit Web Scraping aus? Hast du Einblick in Rechte Strukturen? Wir wollen uns zusammen setzen um uns darüber auszutauschen, wie antifaschistische Aufklärungs und Recherchearbeit im Ditigalen Raum aussehen kann, Erfahrungen und Kompetenzen austauschen und uns zu vernetzen. Do you do (anti-fascist) research work? do you have OSINT skills? are you familiar with web scraping? Do you have insight into right-wing structures? We want to sit down together to exchange ideas about what anti-fascist education and research work in the digital area can look like, to exchange experiences and competencies and to network. Do you do (anti-fascist) research work? do you have OSINT skills? are you familiar with web scraping? Do you have insight into right-wing structures? We want to sit down together to exchange ideas about what anti-fascist education and research work in the digital area can look like, to exchange experiences and competencies and to network. https://events.ccc.de/congress/2025/hub/event/detail/antifa-recherche-meetup_ijap false 2025-12-29T20:00:00+01:00 20:00 02:00 Saal 5 39c3-antifa-recherche-meetup_k12t de Workshop Machst du (antifaschistische) Recherche Arbeit? hast du OSINT Kompetenzen? kennst du dich mit Web Scraping aus? Hast du Einblick in Rechte Strukturen? Wir wollen uns zusammen setzen um uns darüber auszutauschen, wie antifaschistische Aufklärungs und Recherchearbeit im Ditigalen Raum aussehen kann, Erfahrungen und Kompetenzen austauschen und uns zu vernetzen. Do you do (anti-fascist) research work? do you have OSINT skills? are you familiar with web scraping? Do you have insight into right-wing structures? We want to sit down together to exchange ideas about what anti-fascist education and research work in the digital area can look like, to exchange experiences and competencies and to network. Machst du (antifaschistische) Recherche Arbeit? hast du OSINT Kompetenzen? kennst du dich mit Web Scraping aus? Hast du Einblick in Rechte Strukturen? Wir wollen uns zusammen setzen um uns darüber auszutauschen, wie antifaschistische Aufklärungs und Recherchearbeit im Ditigalen Raum aussehen kann, Erfahrungen und Kompetenzen austauschen und uns zu vernetzen. Do you do (anti-fascist) research work? do you have OSINT skills? are you familiar with web scraping? Do you have insight into right-wing structures? We want to sit down together to exchange ideas about what anti-fascist education and research work in the digital area can look like, to exchange experiences and competencies and to network. https://events.ccc.de/congress/2025/hub/event/detail/antifa-recherche-meetup_k12t https://pretalx.chaos.jetzt/jugend/talk/KQ9F83/ https://pretalx.chaos.jetzt/jugend/talk/KQ9F83/feedback/ false 2025-12-29T13:30:00+01:00 13:30 01:00 House of Tea 39c3-celestial-navigation en other Let's practice using the Sun to determine our place in the world, without GPS or calculators. If the talk introducing celestial navigation inspired you to try taking sights with a sextant and plotting the lines of position on nautical charts, then come to the House of Tea to give it a go. Bring a pencil, compass and ruler if you have one (we'll have a few to share), but leave your electronic calculator, computer and GPS in the bag since we'll be doing it the traditional way with sliderules, lookup tables and geometry. https://events.ccc.de/congress/2025/hub/https://usercontent.events.ccc.de/congress/2025/hub/usercontent/e/6ced0c4261d6/chart.jpg hudson https://events.ccc.de/congress/2025/hub/event/detail/celestial-navigation false 2025-12-29T15:00:00+01:00 15:00 02:00 House of Tea 39c3-trickmisch de, en other Drawing, Storyboard for animation https://trixmix.tv we will draw grafics an animate them with our web plattform https://trixmix.tv Julis https://events.ccc.de/congress/2025/hub/event/detail/trickmisch false 2025-12-29T17:30:00+01:00 17:30 01:30 House of Tea 39c3-unveiling-spyware-0-days-linked-to-italy en other Across Europe and beyond, governments — backed by private companies — are quietly deploying intrusive spyware and exploiting 0-days to monitor journalists, activists, and entire communities. Most of this happens in the dark, without transparency, oversight, or democratic debate. This session is an open call to everyone who refuses this model of surveillance: hackers, activists, journalists, researchers, and anyone working to expose abuse and protect the vulnerable. Together, we’ll share findings, map the ecosystem, connect struggles, and imagine practical tools for collective defense — including an open-access ebook and a webinar series for journalists and sources on how to stay safe. If you’ve encountered evidence, leaks, pressure, or outreach from companies producing trojans or 0-days — or if you’re working on related research — please reach out. Anonymous conversations are always welcome. Solidarity first. ✊ An open discussion on surveillance, tech accountability & resistance: Across Europe and beyond, governments — backed by private companies — are quietly deploying intrusive spyware and exploiting 0-days to monitor journalists, activists, and entire communities. Most of this happens in the dark, without transparency, oversight, or democratic debate. This session is an open call to everyone who refuses this model of surveillance: hackers, activists, journalists, researchers, and anyone working to expose abuse and protect the vulnerable. Together, we’ll share findings, map the ecosystem, connect struggles, and imagine practical tools for collective defense — including an open-access ebook and a webinar series for journalists and sources on how to stay safe. What we want to explore together: - Spyware and 0-days currently used in Italy (Paragon) — and the routes through which they spread - Italian-made surveillance tech exported across Europe and the Global South - The surveillance industry’s opacity: vendors, brokers, middlemen, secret deals - Digital threats faced by journalists, activists, and communities — and how to fight back - Opportunities for shared investigations, transnational resistance, and long-term alliances A new year-long investigation will examine how spyware is deployed against journalists and activists in Italy, how it is used in everyday policing, and how tools like Paragon — as well as Italian-made spyware and 0-days — may be circulating across borders. Link to the project: https://events.ccc.de/congress/2025/hub/en/project/detail/so/unveiling-spyware-0day-used-or-made-in-italy-e0 If you’ve encountered evidence, leaks, pressure, or outreach from companies producing trojans or 0-days — or if you’re working on related research — please reach out. Anonymous conversations are always welcome. Solidarity first. ✊ Contact: Matrix: @rositarijtano:matrix.org Signal: rositarijtano.87 Email: rositarijtano@gmail.com https://events.ccc.de/congress/2025/hub/https://usercontent.events.ccc.de/congress/2025/hub/usercontent/e/f35729b8432a/Screenshot_2025-12-11_at_11.32.38.png rositarijtano https://events.ccc.de/congress/2025/hub/event/detail/unveiling-spyware-0-days-linked-to-italy false 2025-12-29T19:30:00+01:00 19:30 01:30 House of Tea 39c3-tbd-opsec-for-journalists-accused-of-terrorism en other Discussion about real-world examples of journalists, academics, activists being targeted by powerful state actors. What are the best OPSEC, INFOSEC and cyber-hygiene practices for those faced with the crushing power of state lawfare and surveillance — and for their sources? Discussion about real-world examples of journalists, academics, activists being targeted by powerful state actors. What are the best OPSEC, INFOSEC and cyber-hygiene practices for those faced with the crushing power of state lawfare and surveillance — and for their sources? jerezim https://events.ccc.de/congress/2025/hub/event/detail/tbd-opsec-for-journalists-accused-of-terrorism false 2025-12-29T21:00:00+01:00 21:00 00:30 House of Tea 39c3-the-spoon-game-39c3-special-edition-workshop-_xf7m en other "The Spoon Game" is an interactive workshop that challenges participants through a journey inspired by the CCC to enlighten you on a curious notion that will change your perspective on spoons for sure! Can you join the choir that sings only in modem beeps? Will you win the speed-typing competition on a reverse Dvorak keyboard? Will you be able to take part in the most chaotic but functional wiring competition? Seemingly trivial questions, but with surprising implications! To understand what connects these mysterious situations, come and discover "The Spoon Game", designed and hosted by Atypha. A workshop around a fascinating game that will change the way you see spoons forever! ⚠️ 7 people/session maximum to ensure a good workshop. Book you slot now: [https://urlr.me/t3DYx6](https://urlr.me/t3DYx6) [#Inclusion](https://events.ccc.de/congress/2025/hub/tag/Inclusion) [#accessibility](https://events.ccc.de/congress/2025/hub/tag/accessibility) https://events.ccc.de/congress/2025/hub/https://usercontent.events.ccc.de/congress/2025/hub/usercontent/e/6dc7a360fa44/Banner-3-The-Spoon-Game.png Atypha (She) https://events.ccc.de/congress/2025/hub/event/detail/the-spoon-game-39c3-special-edition-workshop-_xf7m false 2025-12-29T11:00:00+01:00 11:00 03:00 CDC Circle 39c3-making-own-z-wave-or-zigbee-device-from-scrat_ei4t en Workshop We will program a Z-Wave or a Zigbee device and add it into a Z-Way smart home controller installed on Linux or flashed into an ESP32. We will be making own Z-Wave and Z-Wave Long Range devices Z-Wave Open Source SDK an Trident IoT SDK. It will also be possible to do Zigbee devices. We will program a sensor and a switch using Z-Wave protocol and include it in a Z-Wave network. Or Zigbee. We will also browse the Z-Wave Open Source project, and how existing Trident IoT and SiLabs code differ from them. We will also install Linux version of Z-Way - Z-Wave/Zigbee/Matter Smart Home Controller. You will learn basics of Z-Wave and Z-Wave Long Range, how to include devices and set up security schemes. We will also master using Z-Way smart home controller, investigate it's API and create own Linux or ESP32-based Z-Wave or Zigbee controller. We will also discuss Z-Wave/Zigbee-to-Matter bridging. You will need a laptop (Linux, Mac or Windows) with SSH client, USB A, Google Chrome and internet access. Optionally you can use VS Code (install Trident IoT extension). Bring your Z-Wave devices with you! If you have Home Assistant Connect ZWA-2, take it too! Presentation: https://docs.google.com/presentation/d/1EJFr8toheFOOE_k4l23wkLd98NE8yb8UbnnkNd2UKqU PoltoS https://events.ccc.de/congress/2025/hub/event/detail/making-own-z-wave-or-zigbee-device-from-scrat_ei4t https://pretalx.riat.at/39c3/talk/7CVRJN/ false 2025-12-29T14:00:00+01:00 14:00 02:00 CDC Circle 39c3-programming-the-tropic01-open-source-secure-e_1f9x en Workshop Let's program it on the badge. Pavel Polach https://events.ccc.de/congress/2025/hub/event/detail/programming-the-tropic01-open-source-secure-e_1f9x https://pretalx.riat.at/39c3/talk/XTWLFN/ false 2025-12-29T16:00:00+01:00 16:00 02:00 CDC Circle 39c3-mesh-radio-workshop_gx3d en Workshop Let's build mesh radios from scratch. We will bring 20 PCB kits, containing all parts. Soldering is difficult but doable in the Congress. You have to be very proficient with soldering to get this done during Congress, but the Eternal Soldering Workshop is open and nearby. We also have solder paste and stencils for the real pros! If you don't want to get into soldering now, you can take one of the kits home. During the workshop you will get to know everything necessary to get the job done. Jitter https://events.ccc.de/congress/2025/hub/event/detail/mesh-radio-workshop_gx3d https://pretalx.riat.at/39c3/talk/YPX33R/ false 2025-12-29T18:00:00+01:00 18:00 02:00 CDC Circle 39c3-a-hands-on-guide-for-people-who-want-to-install-an en Workshop Join us for a practical session on auditing network traffic. In this workshop, you will learn how to use SocksTrace to intercept, analyze, and socksify applications. Workshop Plan: - Setup & Installation - Basic Usage (Detecting Leaks) - Advanced Configuration (Whitelist/Blacklist) - Q&A and Debugging (Troubleshooting common setup) Robert Mindo https://events.ccc.de/congress/2025/hub/event/detail/a-hands-on-guide-for-people-who-want-to-install-an https://pretalx.riat.at/39c3/talk/8UK8XJ/ false 2025-12-29T20:00:00+01:00 20:00 02:00 CDC Circle 39c3-zerocat-chipflasher en Workshop Introduction into chip flasher device history and operation - get trained! The Zerocat Chipflasher is a versatile device that is made for firmware replacement. Its operation requires some training and some knowledge about typical difficulties in in-system flash programming. This device comes with freedom in mind, down to details. It started as a cellar-project during the time of Snowden revelations, and now reaches a point of maturity in cooperation with the GNU Boot project. Key features that make this device a reproducable tool on GNU/Linux-Libre systems, now and in future, will be explained. You will be trained in device operation, targeting a hard-to-flash ThinkPad T60 systemboard. Successful operation should result in a successful boot of the liberated T60 laptop - but let’s see! -- https://www.zerocat.org https://pretalx.riat.at/media/39c3/submissions/YSX8LU/chipflasher-device.1_wVMlAWi.png Zerocat https://events.ccc.de/congress/2025/hub/event/detail/zerocat-chipflasher https://pretalx.riat.at/39c3/talk/YSX8LU/ false 2025-12-29T13:00:00+01:00 13:00 02:00 Chaoswellen Assembly 39c3-pota-parks-on-the-air-day-3 de, en other Introduction to Parks on the Air (POTA). POTA is an international radiosport award program that encourages licensed amateur radio operators to visit, enjoy and operate portable equipment in a variety of parks and public lands. POTA introduction "in a nutshell" followed by joint POTA activation on shortwave in the "Planten un Blomen" park right next to the CCH. We meet daily at 01:00 p.m. at the Assembly for a short introduction and then go out into the park together. The participants learn how to set up a portable shortwave station and get a crash course in shortwave operation. Then it's time to get on the air! Other radio amateurs around the world are waiting to contact us. Can you manage the 10 radio connections necessary for a successful "activation" of the park? NOTE: We meet AT THE CHAOSWELLE ASSEMBLY and start there with a short introduction to the POTA program. Then we go out into the park together. Dress warmly and weatherproof! We go outside even when it's raining or snowing! If anyone wants to join us later: radio amateurs can reach us in the park on 145.500 MHz FM. Our location in the park: [OpenStreetMap](https://www.openstreetmap.org/directions?engine=fossgis_osrm_foot&route=53.561346%2C9.986447%3B53.559593%2C9.986438#map=18/53.560490/9.986277) https://events.ccc.de/congress/2025/hub/https://usercontent.events.ccc.de/congress/2025/hub/usercontent/e/e376bdeda7dc/pota_banner_winter_2.jpg DK4HAA https://events.ccc.de/congress/2025/hub/event/detail/pota-parks-on-the-air-day-3 false 2025-12-29T15:00:00+01:00 15:00 02:00 Chaoswellen Assembly 39c3-flinta-pota-party-parks-on-the-air de, en other Introduction to Parks on the Air (POTA) for FLINTA*. POTA is an international radiosport award program that encourages licensed amateur radio operators to visit, enjoy and operate portable equipment in a variety of parks and public lands. POTA introduction for FLINTA* followed by joint POTA activation on shortwave in the "Planten un Blomen" park right next to the CCH. We meet at 03:00 p.m. at the Assembly for a short introduction and then go out into the park together. You'll learn how to set up a portable shortwave station and get a crash course in shortwave operation. Then it's time to get on the air! Other radio amateurs around the world are waiting to contact us. Can you manage the 10 radio connections necessary for a successful "activation" of the park? NOTE: We meet AT THE CHAOSWELLE ASSEMBLY and start there with a short introduction to the POTA program. Then we go out into the park together. Dress warmly and weatherproof! We go outside even when it's raining or snowing! If anyone wants to join us later: our location in the park: [OpenStreetMap](https://www.openstreetmap.org/directions?engine=fossgis_osrm_foot&route=53.561346%2C9.986447%3B53.559593%2C9.986438#map=18/53.560490/9.986277) https://events.ccc.de/congress/2025/hub/https://usercontent.events.ccc.de/congress/2025/hub/usercontent/e/b67fb433a556/pota_banner_ccc.jpg DK4HAA https://events.ccc.de/congress/2025/hub/event/detail/flinta-pota-party-parks-on-the-air false 2025-12-29T17:30:00+01:00 17:30 01:00 Chaoswellen Assembly 39c3-bauen-der-xota-antenne-building-the-xota-antenna de, en other DK1BOU https://events.ccc.de/congress/2025/hub/event/detail/bauen-der-xota-antenne-building-the-xota-antenna false 2025-12-29T18:30:00+01:00 18:30 00:30 Chaoswellen Assembly 39c3-openrtx-meetup en other OpenRTX community meetup OpenRTX community meetup marco https://events.ccc.de/congress/2025/hub/event/detail/openrtx-meetup false 2025-12-29T10:00:00+01:00 10:00 01:30 Kidspace - Workshopraum 39c3-einfuhrung-in-scratch de, en other Einführung in Scratch A very brief introduction to Scratch. We'll help you get started and show you how you can make your own games and animations in the Scratch programming environment. Please bring your own computer (and if possible a mouse). https://events.ccc.de/congress/2025/hub/event/detail/einfuhrung-in-scratch false 2025-12-29T11:45:00+01:00 11:45 01:00 Kidspace - Workshopraum 39c3-bau-dir-einen-kritzelbecher de, en other Mit Filzstiften, Pappbecher, Elektromotor und Batterien bauen wir uns einen tanzenden Kritzel-"Roboter". Ab 8 Jahren. Bitte anmelden unter DECT 3924. arp (HE / HIM) https://events.ccc.de/congress/2025/hub/event/detail/bau-dir-einen-kritzelbecher false 2025-12-29T13:00:00+01:00 13:00 01:30 Kidspace - Workshopraum 39c3-wir-zerlegen-einen-plasterouter de, en other Wir zerlegen einen Plasterouter Unter fachnerdischer Aufsicht gucken wir uns gemeinsam Internetrouter mal genau an. Wozu ist welcher Knopf, welche Buchse, welches Lämpchen. Wie sieht so ein Ding von innen aus und finden wir da vielleicht einen versteckten Debug-Port, auf den wir uns mal auflöten können? https://events.ccc.de/congress/2025/hub/event/detail/wir-zerlegen-einen-plasterouter false 2025-12-29T14:45:00+01:00 14:45 01:00 Kidspace - Workshopraum 39c3-post-fur-das-nebelhornchen de other Das Nebelhörnchen kennt sich mit Umwelt, Klima und Technologie aus. Es möchte sein Wissen mit euch teilen und beantwortet gerne Briefe. Schreibt ihm doch eine Postkarte mit einer Frage. Vielleicht habt ihr auch eine spannende Geschichte, wie ihr auf die Frage gekommen seid. Das Nebelhörnchen ist ein neuer Kinder-Klima-Podcast der Scientists for Future. Ihr habt hier die einmalige Gelegenheit, den Podcast beim Start mitzugestalten. Mit etwas Glück bekommt ihr nach einer Weile euren Brief und die Antwort vom Nebelhörnchen im Podcast vorgelesen. Pascal4F https://events.ccc.de/congress/2025/hub/event/detail/post-fur-das-nebelhornchen false 2025-12-29T16:00:00+01:00 16:00 01:30 Kidspace - Workshopraum 39c3-auseinanderbauen-fur-anfanger de, en other Macht die Schraubenzieher bereit. Wir rücken alter Hardware zu Leibe. Some kids have a hard to hold back desire to open and dismantle hardware. While this is usually a hacker parents' nightmare, who wants to find the home sever in pieces, we got the cache to turn it into a learning experience where kids can tear old computers apart and get an explanation what the parts they just unscrewed are used for. Maybe we also put back everything together afterwards and count lost screws. https://events.ccc.de/congress/2025/hub/event/detail/auseinanderbauen-fur-anfanger false 2025-12-29T17:45:00+01:00 17:45 01:30 Kidspace - Workshopraum 39c3-go de, en other Join us and learn to play Go (Baduk, WeiQi). The rules are simple and you can play after a few Minutes your first 9x9 match. The fun starts at the beginning, and with the time you will discover a deepness that make it the most complex game existing. In Asia Go it belongs to one of the arts, that an educated person shall know. We teach the rules in the first 10 minutes and the rest of the time you discover by playing. You can leave earlir or arrive late, but we cannot guarantee you that you get an individual introduction. And maybe there is even a chance to learn why we think the ear readding move of Shusaku was a real Power Cycle. https://events.ccc.de/congress/2025/hub/event/detail/go false 2025-12-29T20:15:00+01:00 20:15 01:30 Kidspace - Workshopraum 39c3-camp27-family-village-kickoff de, en other Networking meeting to plan a Family Village at Chaos Communication Camp 2027. We don’t want to plan anything concrete yet, but we do want to lay the groundwork. How do we envision a Family Village at the next camp? What went well at the last camp, and what could be changed? How would we deal with a changed infrastructure? Matrix, Mastodon, mailing list – how do we want to communicate? aram https://events.ccc.de/congress/2025/hub/event/detail/camp27-family-village-kickoff false 2025-12-29T11:00:00+01:00 11:00 00:50 Bits&Bäume Workshop Area 39c3-promptbastelei-und-andere-uberlebensstrategien de Meetup 50 Minutes Wie fühlt sich Coden an, wenn immer eine KI im Tab daneben sitzt? In dieser Session wollen wir mit euch eure Erfahrungen diskutieren. Wir bringen Fragen aus unseren Fallstudien mit, ihr eure Alltagspraxis als Entwickler:innen: Wo setzt ihr KI konkret ein, wo lasst ihr sie bewusst draußen, wie verändert sie euren Workflow, eure Zusammenarbeit im Team und euer Rollenverständnis als Dev? Alle reden über KI als Gamechanger, aber wie fühlt es sich an, wenn man als Dev mittendrin steckt? In unserer Session öffnen wir einen Raum, in dem Forschung und Programmierpraxis zusammenkommen. Wir bringen erste Fragen und Muster aus unseren wissenschaftlichen Fallstudien in Softwareunternehmen mit, ihr eure täglichen Erfahrungen aus Projektstress, Legacy Code und Promptbastelei. Gemeinsam wollen wir rekonstruieren, wie KI konkret in eure Pipelines rutscht, wie ihr mit Black Box Momenten umgeht, warum ihr bestimmten Outputs vertraut und anderen nicht und welche neuen Routinen sich im Team herausbilden. Uns interessiert, was ihr gelernt habt, was ihr bewusst verweigert und wie sich euer Selbstbild als Entwickler:in vielleicht verschoben hat. Statt Hochglanzversprechen setzen wir auf eine ehrliche, kontroverse Gesprächsrunde. Hier teilen wir Erfahrungen, beleuchten Spannungsfelder und schärfen unser Bild davon, welche konkrete Rolle KI derzeit in der Programmierpraxis spielt, inklusive Widersprüchen. Bringt deshalb gerne die ungelösten Fragen und offenen Baustellen ein, an denen ihr als Entwickler:innen und wir als Forscherinnen gemeinsam weiterdenken und -experimentieren können. https://pretalx.freifunktag.de/media/39c3-bub-workshops-2025/submissions/ZAE8ZW/dev_exp_EReeoCz.jpg Marlene Kulla Ann Katzinski https://events.ccc.de/congress/2025/hub/event/detail/promptbastelei-und-andere-uberlebensstrategien https://pretalx.freifunktag.de/39c3-bub-workshops-2025/talk/ZAE8ZW/ true 2025-12-29T12:00:00+01:00 12:00 00:50 Bits&Bäume Workshop Area 39c3-zwischen-assistenz-und-ki-selbst-kontrolle-generat de Workshop 50 Minutes Wie verändert generative KI den Beruf des Programmierens, und was passiert, wenn Entwickler:innen KI-Systeme nicht nur als Werkzeug, sondern als Orientierungssystem, Feedbackgeber oder Management-Ersatz nutzen? Unser Vortrag beleuchtet diese Frage anhand einer sozialwissenschaftlichen Analyse von Reddit-Diskussionen, in denen Softwareentwickler:innen offen über ihre Erfahrungen mit generativer KI im Arbeitsalltag sprechen. Wir zeigen aus unseren Erhebungen: Generative KI wird nicht nur als Code-Assistent, sondern zunehmend als strukturierende Instanz genutzt; eine selbstgewählte Feedbackinstanz, die auf der einen Seite Autonomie verspricht und andererseits zugleich neue Abhängigkeiten schafft. In unserem Workshop wollen wir gemeinsam darüber sprechen, was diese Gegensätze für uns in der Praxis bedeuten. Die Softwareentwicklung gilt als Berufsfeld mit hohem Maß an Autonomie, kollaborativem Wissensaustausch und einer stark community-getriebenen Lernkultur. Mit dem Einzug generativer KI verändern sich diese Strukturen grundlegend. Der spontane Austausch unter Kolleg:innen oder auf Foren wie Stack Overflow wird zunehmend durch den Dialog mit dem ChatBot ersetzt. In unserem Vortrag möchten wir die Konsequenzen daraus beleuchten. Zuerst stellen wir drei zentrale Ergebnisse unserer empirischen Forschung vor und werden diese anschließend analysieren und vor dem Hintergrund arbeitssoziologischer Annahmen diskutieren. Unsere Studie basiert auf einer digital-ethnografischen Analyse von Diskussionsbeiträgen auf Reddit, in denen sich Softwareentwickler:innen offen über ihre Erfahrungen mit generativer KI austauschen. Daraus können wir zeigen, dass Entwickler:innen KI-Systeme in drei Rollen verorten: KI als Werkzeug: Die KI wird gezielt eingesetzt, um klar abgegrenzte Aufgaben zu erledigen. Ziel und Vorgehen stehen fest, die Kontrolle über Prozess und Ergebnis liegt vollständig bei dem Nutzenden. KI als Assistenz: Die KI unterstützt als dialogisches Gegenüber. Sie kann Ideen liefern und Alternativen vorschlagen, aber Auswahl, Bewertung und Einordnung der Inhalte bleiben beim Menschen. KI als Proxy-Management: Die Entwickler:in weist der KI bewusst eine leitende Rolle zu und überträgt ihr die Steuerung und Bewertung des eigenen Arbeitsprozesses. Gerade in dieser letzten Form zeigt sich ein spannendes Phänomen: KI als Feedbackinstanz ohne soziale Interaktion. Kein Gatekeeping auf Stack Overflow, kein „Wie, das weißt du nicht?“, keine Unsicherheiten vor Kolleg:innen zugeben und keine endlosen Google-Suchen, die ins Leere führen. Stattdessen ein vermeintlich privater und immer verfügbarer SafeSpace, in dem Unwissenheit nicht offenbart oder verurteilt wird – und man immer eine Antwort bekommt. Viele beschreiben das als Gewinn an Autonomie. Andere berichten jedoch vom Gegenteil: Von wachsender Isolation, schleichendem Kompetenzverlust und einer neuen Form von Abhängigkeit. Diese Ambivalenz verstehen wir als Spannungsfeld zwischen technikvermittelter Selbstermächtigung und Kontrolle. Aus der Perspektive der Professionssoziologie – in Anlehnung an Andrew Abbotts The System of Professions (1988) – werden berufliche Zuständigkeiten („jurisdictions“) stets neu ausgehandelt. Dabei spielen technologische Entwicklungen eine zentrale Rolle, weil sie bestimmen, welches Wissen als Expertise gilt und wer es beanspruchen kann. Für die Zukunft der Softwareentwicklung bedeutet dies vielleicht: Weg vom kollektiven Wissensaustausch hin zu einer individualisierten Praxis. In unserem Workshop möchten wir mit euch diese Dynamiken zwischen Autonomie und Abhängigkeit hinterfragen und diskutieren. Begegnet uns hier eine neue Form von KI-(Selbst)-Kontrolle, jenseits klassischer Hierarchien? Und welche Folgen bedeutet das für unser Selbstverständnis, Lernprozesse und die soziale Verankerung professioneller Programmierarbeit? https://pretalx.freifunktag.de/media/39c3-bub-workshops-2025/submissions/SJ3UFJ/dev_exp_QhO9FTQ.jpg Marlene Kulla Ann Katzinski https://events.ccc.de/congress/2025/hub/event/detail/zwischen-assistenz-und-ki-selbst-kontrolle-generat https://pretalx.freifunktag.de/39c3-bub-workshops-2025/talk/SJ3UFJ/ true 2025-12-29T13:00:00+01:00 13:00 00:50 Bits&Bäume Workshop Area 39c3-fsfe-insights_q0tl en Meetup 50 Minutes Join this session to gain a deeper understanding of the work of the Free Software Foundation Europe (FSFE) and how the organisation empowers users to take control of technology. We will explore FSFE’s wide range of activities — from advocacy and policy work at the European level to practical initiatives such as “Public Money? Public Code!”, which promotes publicly funded software being released as Free Software. Explore how we fight for Device Neutrality and how we want to spark children's interest in coding. The session will also highlight FSFE’s legal support efforts, community-building activities, and public awareness campaigns that help ensure technology remains accessible, transparent, and shaped by its users rather than by restrictive corporate or governmental control. Ana https://events.ccc.de/congress/2025/hub/event/detail/fsfe-insights_q0tl https://pretalx.freifunktag.de/39c3-bub-workshops-2025/talk/KSAZCE/ false 2025-12-29T14:00:00+01:00 14:00 00:50 Bits&Bäume Workshop Area 39c3-visualize-your-texts-with-wordrain en Workshop 50 Minutes The Word Rain visualization technique is a development of the classic word cloud that aims to retain the simplicity of the word cloud, while at the same time making it possible to use the text visualization for exploring and comparing corpora. https://wordrain.org https://github.com/CDHUppsala/word-rain https://pretalx.freifunktag.de/media/39c3-bub-workshops-2025/submissions/XU7JMG/unified-english-images-climate_small_5GfCMlm.png Torsten Roeder Magnus Ahltorp Maria Skeppstedt https://events.ccc.de/congress/2025/hub/event/detail/visualize-your-texts-with-wordrain https://pretalx.freifunktag.de/39c3-bub-workshops-2025/talk/XU7JMG/ false 2025-12-29T15:00:00+01:00 15:00 00:50 Bits&Bäume Workshop Area 39c3-einfuhrung-in-den-online-editor-id de Workshop 50 Minutes In dieser Session wird euch der Online-Editor iD vorgestellt werden, mit dem ihr zu OpenStreetMap beitragen könnt. Während der Session könnt ihr Fragen zum Beitragen zu OpenStreetMap, dem Mappen, stellen. Um zu OpenStreetMap beizutragen, ist ein Benutzerkonto erforderlich. Gerne dürft ihr euch vor der Session ein OpenStreetMap-Konto anlegen, dazu benötigt ihr nur einen Benutzernamen und eine gültige E-Mail-Adresse. Nakaner https://events.ccc.de/congress/2025/hub/event/detail/einfuhrung-in-den-online-editor-id https://pretalx.freifunktag.de/39c3-bub-workshops-2025/talk/MRPVWV/ false 2025-12-29T16:00:00+01:00 16:00 00:50 Bits&Bäume Workshop Area 39c3-25-jahre-freifunk-2027-als-festjahr de Workshop 50 Minutes 2027 wird Freifunk 25 Jahre alt. Lasst uns gemeinsam überlegen, wie wir das feiern können. Einige erste Ideen: * Dezentrale Veranstaltungen * 1-2 größere Sachen mit internationaler Beteiligung * Werbung und Pressearbeit * Weggefährten aus den Anfangszeiten aktivieren. Andi Bräu https://events.ccc.de/congress/2025/hub/event/detail/25-jahre-freifunk-2027-als-festjahr https://pretalx.freifunktag.de/39c3-bub-workshops-2025/talk/J93HPG/ false 2025-12-29T17:00:00+01:00 17:00 00:50 Bits&Bäume Workshop Area 39c3-sorten-zuchten-fur-dummies_ea33 de Meetup 50 Minutes Gemeinsam entwickeln wir genetischen Code. An einem konkreten Beispiel steigt ihr selbst in die Tomatenzucht ein. Inklusive Saatgut. Du hast zwei Pflanzen gekreuzt. Ihre Nachkommen sind wunderschön. In der nächsten Generation scheint der Zauber kaputt, nur wenige Exemplare besitzen das schöne Merkmal. Was ist passiert? Und wie kann daraus eine stabile, schöne Sorte entstehen? Vererbung kann stark vereinfacht mit den Mendelschen Regeln erklärt werden, die du wahrscheinlich aus dem Bio-Unterricht kennst. Um Gemüsesorten zu züchten, reichen sie aus: F1 heißt 1. Kindgeneration. Wenn du zwei samenfeste Sorten gekreuzt hast, mischen die Merkmale der Elternpflanzen sich gleichmäßig. In unserem Beispiel kreuzten sich eine rote und eine gefleckte Tomatensorte zu einer Generation mit rot-violett gestreiften Früchten. F2 heißt 2. Kindgeneration. Die Merkmale "mendeln sich aus", jede Pflanze wird anders bunte Früchte tragen. Samen von der F2-Generation bekommst du gratis in diesem Workshop. Züchtung heißt, diese zu selektieren, bis das Streifenmuster nach Jahren samenfest wird. Säe mehrere Körner, ernte viele Tomaten - sammle ausschließlich Saatgut von den Rot-Violetten! https://pretalx.freifunktag.de/media/39c3-bub-workshops-2025/submissions/99X7KF/Workshop_20250802_135028_jPGtY01.jpg Coco https://events.ccc.de/congress/2025/hub/event/detail/sorten-zuchten-fur-dummies_ea33 https://pretalx.freifunktag.de/39c3-bub-workshops-2025/talk/99X7KF/ false 2025-12-29T18:00:00+01:00 18:00 01:50 Bits&Bäume Workshop Area 39c3-community-data-centers-a-workshop en Workshop 110 Minutes What if local communities operated their own data centres? How might that look and function? To what extent would it be democratic and sustainable? Who would (not) benefit from it? In this workshop, we would like to think through, examine and discuss alternative models for the ownership and management of collective data centres. We will take a structured look at fundamental concepts, governance issues and implications, as well as discuss parallel ideas in other areas (cooperative banks or housing, community-supported agriculture) in the hope of initiating a broad discussion about alternatives to the profit and exploitation logic of the current data centre industry. Similar approaches to data centers that already exist include Nubo (Belgium), Espora (Mexico) and Wobcom (Germany). Rainer Rehak Nicolas Tara Merk https://events.ccc.de/congress/2025/hub/event/detail/community-data-centers-a-workshop https://pretalx.freifunktag.de/39c3-bub-workshops-2025/talk/HB9EBD/ false 2025-12-29T20:00:00+01:00 20:00 00:50 Bits&Bäume Workshop Area 39c3-its-global-capitalism-stupid-soziale-bewegungen-ge de Workshop 50 Minutes Wir sind Bewegungen und antikapitalistische Aktivist * innen, die eine Vielfalt an Widerstandsformen praktizieren. Wir haben genug von Amazon, Google, Microsoft, Meta, Tesla, OpenAI, Nvidia und Co.! Deshalb wollen wir interessierte Menschen, Aktivist * innen und Bewegungen zusammenbringen, uns vernetzen und lokale Kämpfe verbinden. Wir wollen unser Problemverständnis vertiefen, uns über notwendige Aktionsformen austauschen, gemeinsam Strategien entwickeln und den Widerstand vorantreiben. In diesem Workshop diskutieren wir Strategien und stellen die Cables of Resistance Bewegungskonferenz vom 10 - 12 April in Berlin vor. Während die Ökosysteme kollabieren und menschliches Leben auf der Erde immer prekärer wird, lassen sich CEOs großer Tech-Unternehmen zum Spaß ins All schießen und träumen davon, das Universum als unsterbliche Maschinenmenschen zu kolonisieren. Sie inszenieren sich als Heilsbringer und haben für den Rest der Menschheit nur offenen Zynismus übrig. Wir sehen einen massiven Angriff auf Gewerkschaften und demokratische Institutionen, die ihnen bisher zumindest noch mit Schranken drohten. Der Abbau der für ihre Produkte nötigen Rohstoffen verwüstet ganze Landschaften und vertieft koloniale Ausbeutung. Mit ihren „sozialen“ Medien befördern sie die Vereinzelung und den Zusammenbruch von demokratischen Öffentlichkeiten. Sie kontrollieren umfassende Infrastrukturen und setzen diese ein, um die Macht faschistischer Kräfte zu verstärken und einen technokratisch-autoritären Gesellschaftsumbau zu beschleunigen. Wir sind Bewegungen und antikapitalistische Aktivist * innen, die eine Vielfalt an Widerstandsformen praktizieren. Wir haben genug von Amazon, Google, Microsoft, Meta, Tesla, OpenAI, Nvidia und Co.! Deshalb wollen wir interessierte Menschen, Aktivist * innen und Bewegungen zusammenbringen, uns vernetzen und lokale Kämpfe verbinden. Wir wollen unser Problemverständnis vertiefen, uns über notwendige Aktionsformen austauschen, gemeinsam Strategien entwickeln und den Widerstand vorantreiben. https://pretalx.freifunktag.de/media/39c3-bub-workshops-2025/submissions/XMTF8P/signal-2025-12-15-220516_002_K1CaqfC.png Rike https://events.ccc.de/congress/2025/hub/event/detail/its-global-capitalism-stupid-soziale-bewegungen-ge https://pretalx.freifunktag.de/39c3-bub-workshops-2025/talk/XMTF8P/ true 2025-12-29T21:00:00+01:00 21:00 00:50 Bits&Bäume Workshop Area 39c3-un-hacking-digital-sovereignty en Workshop 50 Minutes As members of the Switzerland Chapter of the Internet Society we would like to bring together activists, NGOs, and businesses who strive to make our communities, states, and supranational institutions truly digitally sovereign, i.e.: As (collaborative but independent) actors connected by distributed networks powered by free software enabling the free exchange of information over open data formats. Given that those who dislike this vision have deep pockets, excellent contacts to politicians, and marketing teams who try to give "digital sovereignty" a very different meaning from how we understand it ("buy European"), we as a community should a) network to get to know the other actors who are working on this topic and be more effective **together**, b) understand what is going on elsewhere in Europe, and c) exchange news, ideas, challenges, successes and failures in influencing policy so that other activists can learn from them. Cryptpad document for the session: https://cryptpad.fr/code/#/2/code/edit/9Xjq3o+57GnYbmNmGWY2fxCv/ Alex https://events.ccc.de/congress/2025/hub/event/detail/un-hacking-digital-sovereignty https://pretalx.freifunktag.de/39c3-bub-workshops-2025/talk/3NNWJF/ true 2025-12-29T12:00:00+01:00 12:00 00:30 Kidspace - Hackcenter 39c3-minecraft-commands de other Möchtest du in Minecraft einen Command-Block oder Barrieren haben? Oder dich zu anderen Personen teleportieren? Das zeige ich euch! FMT https://events.ccc.de/congress/2025/hub/event/detail/minecraft-commands false 2025-12-29T14:00:00+01:00 14:00 01:30 Kidspace - Hackcenter 39c3-spieleprogrammieren-mit-pygame_4rw4 de other Wir beschäftigen uns damit wie Spiele aufgebaut werden und funktionieren und programmieren ein eigenes Spiel auf Grundlage von einer erweiterbaren und je nach Zeit und Interesse vollständig austauschbaren Jump'n'Run-Vorlage. Wir arbeiten dabei mit der Programmiersprache Python und der dazugehörigen Bibliothek PyGame. Es ist kein Vorwissen notwendig um die Inhalte zu verstehen; der Workshop ist für alle geeignet die ein Interesse daran haben, zu verstehen wie Videospiele gemacht werden oder eigene Ideen für Spiele umsetzen wollen. Wer sich ein Laptop für den Workshop ausleihen möchte, sollte sich spätestens eine Stunde vor dem Workshop an der Teckids-Assembly im Digitalcourage-Habitat melden. Siehe auch [https://events.ccc.de/congress/2025/hub/de/project/detail/assembly/laptop-ausleihe-fur-junghackerinnen/](https://events.ccc.de/congress/2025/hub/de/project/detail/assembly/laptop-ausleihe-fur-junghackerinnen/) Wer ein eigenes Laptop benutzen möchte, benötigt ein Linux-System mit Thonny und Tiled. Wer nach den ersten 1,5 Stunden noch weiter machen möchte, kann [bei Teil 2 an der Teckids-Assembly]([https://events.ccc.de/congress/2025/hub/de/event/detail/spieleprogrammieren-mit-pygame-teil-3-tag-2](https://events.ccc.de/congress/2025/hub/de/event/detail/spieleprogrammieren-mit-pygame-teil-3-tag-2)) weitermachen. darius kenorca Natureshadow https://events.ccc.de/congress/2025/hub/event/detail/spieleprogrammieren-mit-pygame_4rw4 false 2025-12-29T12:00:00+01:00 12:00 06:00 callforart_afzk 39c3-afzk-archiv-fur-zeitgenossische-kulturgeschichte de, en other **_Takes place in Saal Y at the proving ground assembly. [→ c3nav-Link ←](https://39c3.c3nav.de/l/provingground/)_** **Genre: Exhibition** The Archive for Contemporary Cultural History (AfZK) is conceived as an open, living network that captures everyday culture in its present form – before it disappears, is forgotten, or co-opted. It is not a closed system, but a growing, decentralized space that can emerge anywhere: In a box, on a hard drive, on a server, or in many places at once. All media formats are welcome – from audio and video to text, objects, drawings, and both digital and analog materials. * day 3 12:00 - 18:00 * day 4 12:00 - 15:00 Picture: AfZK - Archiv für Zeitgenössische Kulturgeschichte ©noja meier https://events.ccc.de/congress/2025/hub/https://usercontent.events.ccc.de/congress/2025/hub/usercontent/e/92055f3971d7/2048-1536-max.jpg artnplay https://events.ccc.de/congress/2025/hub/event/detail/afzk-archiv-fur-zeitgenossische-kulturgeschichte false 2025-12-29T12:00:00+01:00 12:00 02:00 Call for Art: raumzeit 39c3-warum-ist-die-raumzeit-krumm_fqtn de, en other **_Takes place in the entrance hall next to the welcome desk. [→ c3nav-Link ←](https://39c3.c3nav.de/l/c:0:237.95:198.54/)_** **Artist: Raumzeit Kollektiv** **Genre: interactive Installation** In our performative exhibition “Why is space-time curved?”, visitors can immerse themselves in an artistic journey through questions of physics. Artists Miriam Ebbig, Steff Hörmanseder, and Ilona Klein have collaborated with physicist Luz Lea Richtmann to interpret physical questions artistically. Come by and explore the resulting exhibits from the fields of music, projection, installation, and video art. You can decide for yourself how you want to move through the exhibition, whether you want to explore details, let yourself drift through, or read up on exciting background information. If there are physics questions that have been on your mind for a long time but you've been unsure or shy about asking, come to the Physics Cabinet! Here you can ask physicists your questions without being seen. There is also a station where you can creatively express your own inspirations and new questions or answers. **day 1 - 3 performative physics - cabinet; polylux show 12:00 - 2:00 pm 5:00 - 7:00 pm** Picture: Warum ist die Raumzeit krumm? ©QuantumFrontiers | Sofie Puttfarken https://events.ccc.de/congress/2025/hub/https://usercontent.events.ccc.de/congress/2025/hub/usercontent/e/05ead63289ce/raumzeit_4096-2731-max.jpg artnplay https://events.ccc.de/congress/2025/hub/event/detail/warum-ist-die-raumzeit-krumm_fqtn false 2025-12-29T17:00:00+01:00 17:00 02:00 Call for Art: raumzeit 39c3-warum-ist-die-raumzeit-krumm_4gf8 de, en other **_Takes place in the entrance hall next to the welcome desk. [→ c3nav-Link ←](https://39c3.c3nav.de/l/c:0:237.95:198.54/)_** **Artist: Raumzeit Kollektiv** **Genre: interactive Installation** In our performative exhibition “Why is space-time curved?”, visitors can immerse themselves in an artistic journey through questions of physics. Artists Miriam Ebbig, Steff Hörmanseder, and Ilona Klein have collaborated with physicist Luz Lea Richtmann to interpret physical questions artistically. Come by and explore the resulting exhibits from the fields of music, projection, installation, and video art. You can decide for yourself how you want to move through the exhibition, whether you want to explore details, let yourself drift through, or read up on exciting background information. If there are physics questions that have been on your mind for a long time but you've been unsure or shy about asking, come to the Physics Cabinet! Here you can ask physicists your questions without being seen. There is also a station where you can creatively express your own inspirations and new questions or answers. **day 1 - 3 performative physics - cabinet; polylux show 12:00 - 2:00 pm 5:00 - 7:00 pm** Picture: Warum ist die Raumzeit krumm? ©QuantumFrontiers | Sofie Puttfarken https://events.ccc.de/congress/2025/hub/https://usercontent.events.ccc.de/congress/2025/hub/usercontent/e/37164c1c8ce3/raumzeit_4096-2731-max.jpg artnplay https://events.ccc.de/congress/2025/hub/event/detail/warum-ist-die-raumzeit-krumm_4gf8 false 2025-12-29T15:00:00+01:00 15:00 09:00 callforart_moorweide 39c3-der-schatz-an-der-moorweide_awa7 de, en other _Starts next to the ball pit between Saal 4 and the cloakroom. [→ c3nav-Link ←](https://39c3.c3nav.de/l/c:0:179.55:184.69/)_ **Artist: Sportforum** **Genre: enigmatic and interactive audio mystery game** An enigmatic and interactive audio scavenger hunt that entices participants to leave the convention center for a while and explore the surrounding area. Our game “Der Schatz an der Moorweide” (The Treasure at Moorweide) sheds light (in the beam of a flashlight trembling with excitement and mystery) on the secrets of a historic place “at the gates of the city.” It is a story about greed, repression, and experiences of marginalization. Duration: approximately 1 hour. You can play alone or in a small group. You will need: 1. An internet-enabled cell phone with headphones. 2. A keen nose and a desire for (gentle) horror. 3. Your jacket, because you'll be going outside. ### Timetable: DAY 1: 14:00 - 22:00 DAY 2: 15:00 - 24:00 DAY 3: 15:00 - 24:00 DAY 4: 11:00 - 16:00 starting point: www.schatzandermoorweide.de Picture: Der Schatz der Moorweide ©Wanja Neite https://events.ccc.de/congress/2025/hub/https://usercontent.events.ccc.de/congress/2025/hub/usercontent/e/474ffd09a667/moorweide_480-640-max.jpg artnplay https://events.ccc.de/congress/2025/hub/event/detail/der-schatz-an-der-moorweide_awa7 false 2025-12-29T16:10:00+01:00 16:10 01:00 callforart_leftathlon 39c3-leftathlon-spendenlauf-gegen-rechts-vr-analog-if-e de, en other _Starts near Fairydust (The huge rocket in the foyer). [→ c3nav-Link ←](https://39c3.c3nav.de/l/c:0:243.05:160.25/)_ **Artist: Leftathlon** **Genre: action and installation** The current shift to the right affects us all, and everything we stand for: diversity, a good life for everyone, and solidarity with one another. It's high time to take action together to maintain and expand anti-fascist structures! This requires determination, perseverance, and money. Of course, we will organize the latter together! That's why we now have the Leftathlon — the spectacular charity run against the right wing! The money will be donated to the association Netzwerk Polylux e.V., which supports democratic structures in the eastern part of Germany. ## Charity Run: DAY_3: 16:10 Picture: Leftathlon-Spendenlauf_gegen_Rechts_(VR&analog)_-_IF_EVERYONE_VOTES_RIGHT,_RUN_LEFT!-©Leftathlon https://events.ccc.de/congress/2025/hub/https://usercontent.events.ccc.de/congress/2025/hub/usercontent/e/700804cfb684/leftathlon.jpg artnplay https://events.ccc.de/congress/2025/hub/event/detail/leftathlon-spendenlauf-gegen-rechts-vr-analog-if-e false 2025-12-29T16:30:00+01:00 16:30 01:30 callforart 39c3-1965-60-jahre-algorithmisches-zeichnen-mit-co_hq46 de, en other **_Takes place in the Foyer, between the Angel Registration Desk and the Cloakroom. [→ c3nav-Link ←](https://39c3.c3nav.de/l/c:0:217.56:176.66/)_** **Artist: Enna Gerhard** **Genre: Exhibition + Workshop** In 1965, something new happened: Artworks were on public display that were created with the help of a computer. These exhibitions of  Georg Nees, A. Michael Noll with Béla Julesz and Frieder Nake with Georg Nees took place in Stuttgart and New York. We looked into different techniques of algorithmic drawing. From hommages to our own ideas, we created several works – sixty years after the first exhibitions. You can find some of these works on the walls of the CCH. Additionally, we want to give several interactive workshops. Here, you can experiment on your own drawings and take them home. Times: * DAY 1: 15:00 - 16:30 * DAY 2: 15:30 - 17:00 * DAY 3: 16:30 - 18:00 * DAY 4: 12:30 - 14:00 artnplay https://events.ccc.de/congress/2025/hub/event/detail/1965-60-jahre-algorithmisches-zeichnen-mit-co_hq46 false 2025-12-29T20:00:00+01:00 20:00 02:00 callforart_care 39c3-careexe-has-stopped-responding_whra de, en other **_Takes place under the round glass elevator next to Saal 3. [→ c3nav-Link ←](https://39c3.c3nav.de/l/c:0:75.55:146.79/)_** **Artist: Katharina Brunnmayr** **Genre: Roleplay** TIMES: * DAY 1: 14:00 - 16:00 * DAY 2: 16:00 - 20:00 * DAY 3: 20:00 - 22:00 * DAY 4: 10:00 - 12:00 What does the future of care look like? What technologies do we want to have available when we get old? Should it really be a care robot looking after us when we're elderly? Explore these questions with the help of a role-playing game and develop an idea for a care technology of the future! artnplay https://events.ccc.de/congress/2025/hub/event/detail/careexe-has-stopped-responding_whra false 2025-12-29T10:00:00+01:00 10:00 02:30 Hardware Hacking Area -- Front-middle 39c3-39c3-led-badge-smd-for-beginners-day-3 en other **39C3 LED badge -- SMD for Beginners** https://github.com/hackwinkel/39C3LEDbadge The 39C3 LED badge contains 42 LEDs that blink under control of of a pre-programmed 4 cent microcontroller. When the badge is alone, the LEDs will blink randomly. When it is among friends (when there are other badges nearby), it will display a chaser pattern. In this workshop you will learn how to solder Surface Mounted Devices using a normal soldering iron. Suitable for beginners. Under 16s only with responsible adult supervision. ### 39C3 LED badge -- SMD for Beginners  Surface Mounted Devices (SMDs) are small compared to Through Hole (TH) electronic components, and have the reputation of being difficult to work with as a hobyist: Difficult to see and handle, when you sneeze, you loose them and you can not easily use them on 2.54mm raster prototyping boards. SMD components are designed to be used in a reflow soldering process where tiny dots of solder paste are applied to a Printed Circuit Board (PCB), after which the SMD components are "Picked and Placed" on the PCB, after which the whole PCB is heated to the melting point of the solder ("reflowing"), actually completing the electrical connections. This workshop is aimed at showing you that the reputation of being difficult to work with is a bit undeserved, and that you can also work with SMDs using just a regular soldering iron: With some simple tricks and a suitable selection of components (not the smallest possible), the vast majority of people can successfully complete this project. Being able to solder SMD projects using just a simple soldering iron will also help you develop some skills that are useful if you need to do "rework" on reflow soldering projects. Reflow soldering is also not difficult to do as a hobbyist, but requires a few more tools like a stencil to apply solder paste and either an oven or a hot plate to do the reflowing. It is, however, much quicker than soldering the parts one by one, and can yield more professional looking, cleaner, solder joints. The project is an electronic name-badge - You should write your name (or nick) on it and wear it. It contains 42 LEDs, a microcontroller, some support components and an InfraRed transmitter and receiver that allow it to communicate with other badges. When the badge detects the presence of other badges ("friends") nearby, it will change its behaviour. It will not only interact with other 39C3 LED badges, but also with TBD badges - come visit the TBD assembly at komona or https://tbd.camp  ### Costs This workshop is donation based. Materials costs are 2 euro per badge. Donations will go towards 1) covering costs of the badges, 2) covering costs of running the hardware hacking area in general, 3) covering costs of organizing TBD (see the TBD assembly at komona or https://tbd.camp) ### Registration The number of participants per session is limited. First come, first served. Either get a participation voucher beforehand or show up early (there may be places left). There will be *numbered* paper vouchers available for each session some time in advance of each session. If you get a voucher and do not show up *before* the designated starting time, someone else may take your spot. Please don't take multiple vouchers and don't take vouchers if you don't actually plan to participate. ### Getting a kit Kits are part of the workshop and not for sale separately. You can, however easily source your own PCBs and parts and make kits yourself because the design is MIT licensed open source. ### Links https://github.com/hackwinkel/39C3LEDbadge Mitch (he/him) the0 (he his him) https://events.ccc.de/congress/2025/hub/event/detail/39c3-led-badge-smd-for-beginners-day-3 false 2025-12-29T10:00:00+01:00 10:00 02:30 Hardware Hacking Area -- Front 39c3-surface-mount-electronics-assembly-for-terrif_qfvy en, de other Surface Mount Electronics Assembly for Terrified Beginners **Surface Mount Electronics Assembly for Terrified Beginners** In this workshop, we will learn to handle the tiniest electronic components, which are used to make modern electronic devices. We will cheat the same way the electronics industry does, and learn the techniques of stencil paste printing and reflow soldering. You will learn a technique that stops your hands from shaking, so you can very very precisely place microscopic parts. We will make an electronic cat that purrs if you handle it correctly. No prior experience or knowledge of anything electronic needed. Caffeine use is not recommended immediately before. All tools are provided. Takes around 2 hours. **Materials costs**: 20€ if you want to make a board, free to observe. **Taught by** Kliment. **Workshop Itinerary**: **Registration**: Sign up on the paper sheet at the Hardware Hacking Area. **Links**: Mitch (he/him) https://events.ccc.de/congress/2025/hub/event/detail/surface-mount-electronics-assembly-for-terrif_qfvy false 2025-12-29T13:00:00+01:00 13:00 02:30 Hardware Hacking Area -- Front 39c3-music-generation-for-newbies-learn-to-solder-_hipp en other Anyone can learn to solder! And anyone can learn to make music, sound (and noise!) with computer chips! All participants will easily learn all of this by making an ArduTouch music synthesizer from a kit. For total beginners. **Learn to solder** by making a way-cool, powerful music synthesizer, and **learn how to make cool music, sound, (and noise!) with computer chips** (The fancy word for making sound with a computer chip is *Digital Signal Processing* or *DSP*). **[ArduTouch](https://cornfieldelectronics.com/cfe/projects.php#ardutouch)** is an open hardware **Ardu**ino-compatible music synthesizer kit with a built-in **Touch** Keyboard, and with built-in speaker/amplifier. It is a really nice performing musical instrument. This workshop is for **total newbies** to learn to solder. This workshop is for **total newbies** to make their own ArduTouch music synthesizer and learn to make music, sound (and noise!) with computer chips. Attendees take their completed synthesizer home at the end of the workshop. The ArduTouch comes pre-programmed with a way cool synthesizer. And I will show you how to re-program it with other way cool (and totally different) synthesizers, and how to make your own synthesizers. For ages 10 - 100. **Materials costs**: The workshop is free, but if you would like to partake in the hands-on aspects of the workshop, Mitch will have ArduTouch kits for **€35**. *Optional*: USB-Serial Cable for re-programming ArduTouch (and many other projects): **5 €**. **Taught by** [Mitch Altman](http://en.wikipedia.org/wiki/Mitch_Altman). _**Optional**: Bring your laptop if you want to go home with the free Arduino software installed on it. Arduino software runs on Windows, MacOS and Linux._ **Workshop Itinerary**: * Intro to music synthesis * Basics of making sound with computer chips (Digital Signal Processing) * Basics of using an Arduino * Learn to solder. Don't let this scare you! I've taught tens of thousands of people to solder, most of whom have never made anything before in their lives. It is actually a very easy skill to learn. It is also very useful. * How to re-program your ArduTouch music synthesizer to make lots of cool music, sounds, (and noise!) **Registration**: **Buy a kit at the Hardware Hacking Area to guarantee a seat, or come by early! (And please do arrive early, regardless!) First come, first served.** **Links**: [ArduTouch music synthesizer kit webpage](https://cornfieldelectronics.com/cfe/projects.php#ardutouch) [Ardiuno software download](https://www.arduino.cc/en/software/) [ArduTouch Github page](https://github.com/maltman23/ArduTouch) https://events.ccc.de/congress/2025/hub/https://usercontent.events.ccc.de/congress/2025/hub/usercontent/e/c14f2071e5a2/music-generation-for-newbies-learn-to-solder-_hipp.banner.jpg https://events.ccc.de/congress/2025/hub/event/detail/music-generation-for-newbies-learn-to-solder-_hipp false 2025-12-29T16:30:00+01:00 16:30 01:30 Hardware Hacking Area -- Front 39c3-build-your-own-air-quality-sensor en other A beginner-friendly, hands-on workshop where you build a working particulate matter air quality sensor using off-the-shelf parts. Learn the basics of IoT environmental monitoring and share your data online with Sensor.Community. # Build Your Own Air Quality Sensor Air pollution affects many people’s daily lives, not only those living near industrial centres. In Ireland, official air quality monitoring relies on a limited number of sensors, so local and short-term pollution sources can be missed. In this 90-minute, hands-on workshop, you’ll build your own particulate matter (PM2.5) air quality sensor using a kit of off-the-shelf parts, then connect it to the Internet so you can view and share the data. ## Sensor.Community [Sensor.Community](https://sensor.community/) is an open, global citizen science network where people build low-cost sensors and share environmental data. Once your device is online, it can publish readings so you can track trends over time and compare data across different locations. ## What You’ll Learn During the workshop, you’ll assemble a working PM2.5 air quality sensor and get it online. We’ll cover the basics of IoT devices, local data collection, and how to publish readings to Sensor.Community. You’ll also learn what the numbers mean, what these sensors are good for, and where their limits are. ## Materials You’ll work with: - ESP8266 board - SDS011 particulate matter sensor (PM2.5 and PM10) - BME280 sensor (temperature, humidity, air pressure) - USB cable - Jumper wires - Plastic tube (air inlet) ## Requirements - A device with a web browser and WiFi, such as a phone or laptop - All setup is browser-based, no software install needed - No previous experience required, beginner-friendly ## Materials Costs It costs **€60** for a kit to take home. ## Instructions [Slides](https://docs.google.com/presentation/d/1H4KuVn2qhhqdg9caCRLc4V6N_QEV1xoevmVM4edoR44/edit?usp=sharing) ## Facilitator Taught by [Jeffrey Roe](https://chaos.social/@tdr112). **Buy a kit at the Hardware Hacking Area to guarantee a seat, or come by early. Please do arrive early, regardless.** https://events.ccc.de/congress/2025/hub/https://usercontent.events.ccc.de/congress/2025/hub/usercontent/e/7992037e6eb0/PXL_20241116_112343300.jpg tdr112 (he/him) https://events.ccc.de/congress/2025/hub/event/detail/build-your-own-air-quality-sensor false 2025-12-29T18:30:00+01:00 18:30 01:00 Hardware Hacking Area -- Front 39c3-learn-to-solder-with-the-i-can-solder-badge-kit en other Anyone can learn to solder! It is useful and fun. This workshop is for kids of all ages (and anyone of any age). We will learn this wonderful skill by making a blinky-badge kit, so you can wear blinky-lights wherever you go. Learn to solder by making a cool badge that you can wear, and have blinky-lights wherever you go. The **["I Can Solder!" Badge kit](https://cornfieldelectronics.com/cfe/projects.php#solderbadge)** is a very simple [open hardware](https://github.com/maltman23/I-Can-Solder--Badge-kit-V2) kit that anyone can use for learning to solder. _This workshop is for_ **total newbies** _to learn to solder. All ages._ **Materials costs**: The workshop is free, but if you would like to partake in the hands-on aspects of the workshop, Mitch will have materials for **€10**. **Taught by** [Mitch Altman](http://en.wikipedia.org/wiki/Mitch_Altman). **Workshop Itinerary**: * Brief overview of electronics * The background of soldering, so you will solder well for the rest of your life * Step by step instructions for soldering your "I Can Solder!" Badge kit * Wear Blinky-Lights wherever you go **Registration**: Buy a kit at the Hardware Hacking Area to guarantee a seat, or come by early! (And please do arrive early, regardless!) First come, first served. **Links**: ["I Can Solder" Badge kit webpage](https://cornfieldelectronics.com/cfe/projects.php#solderbadge) ["I Can Solder" Badge kit Github page](https://github.com/maltman23/I-Can-Solder--Badge-kit-V2) https://events.ccc.de/congress/2025/hub/https://usercontent.events.ccc.de/congress/2025/hub/usercontent/e/ea0e69a6de87/learn-to-solder-with-the-i-can-solder-badge-kit.banner.jpg https://events.ccc.de/congress/2025/hub/event/detail/learn-to-solder-with-the-i-can-solder-badge-kit false 2025-12-29T20:00:00+01:00 20:00 02:00 Hardware Hacking Area -- Front 39c3-emf-explorer-badge-electromagnetic-discorvery_98x2 en other Ever wonder about the invisible world of electromagnetic fields around you? In this beginner-friendly hands-on workshop, you’ll build your own EMF Explorer Badge from a kit, learn about different electromagnetic frequency bands, and walk away ready to explore the unseen frequencies that surround our daily lives. ### EMF Explorer Badge Soldering Workshop In this hands-on build-and-explore workshop, participants assemble their own **[EMF Explorer Badge](https://emfexplorer.space)** using guided soldering instruction, learn the science of electromagnetic frequency bands, and plug in headphones to *listen* to the invisible world around them. Every participant takes home their own exploration kit: badge + headphones, ready for EMF exploring with an illuminated badge that can be used at night for visibility and bling. --- ##### Material Costs €20 - €30 --- ##### Workshop Itinerary - **Welcome + Electronics and Soldering Info** We will show you how to solder. Anyone who can safely hold a soldering iron can do it! It is actually a very easy skill to learn. It is also very useful. - **EMF Explanation and Badge Creation Overview** Learn about what EMF is, where it comes from, and how the badge works. - **Badge Assembly** Get to soldering! We will be available to help you along the way. - **Check your work, and power up your badge!** - **Wrap-Up + Q&A** - **Live Exploration!** You are surrounded by interesting electronics at 39C3. Go exploring! What new sounds do you hear? Some of the most unassuming electronics can make the most interesting sounds. --- ##### Registration Info Buy a kit at the Hardware Hacking Area to guarantee a seat, or come by early! (And please do arrive early, regardless!) First-come, first-served. - **Age:** anyone who can safely hold a soldering iron - **Experience level:** No prior soldering experience required - **Take-home:** Your assembled badge + headphones included --- ##### Links [EmfExplorer.Space](https://emfexplorer.space) --- ##### Instructor Notes This is a **beginner-first hardware workshop**. The goal is skill building, curiosity, and real-world electronics exploration. The badge is both a tool and a conversation piece: it senses EMF, plays it through audio, and glows for visibility and bling. --- ##### Taught by **[Drc3p0](https://links.darcyneal.com)** Drc3p0 (they/them) https://events.ccc.de/congress/2025/hub/event/detail/emf-explorer-badge-electromagnetic-discorvery_98x2 false 2025-12-29T22:30:00+01:00 22:30 02:00 Hardware Hacking Area -- Front 39c3-synth-meetup en, de other Music Synthesizer Meetup -- demo, look, jam, hangout Get together and geek out over music synthesizers, music synthesis, making sound, and creating music. Hardware, software - anything goes! All are welcome to come and talk synths, play synths, share projects, learn, and share. Some attendees have made their own synths at workshops at HOPE_16 -- please bring them! Please feel free to bring any synth or sound-making device. Everyone welcome - no need to bring anything but your interest in music, sound, and noise! **Registration**: No registration -- please show up at the Hardware Hacking Area and join us! https://events.ccc.de/congress/2025/hub/https://usercontent.events.ccc.de/congress/2025/hub/usercontent/e/37a87a983e12/500px-SynthCollage.jpg Mitch (he/him) https://events.ccc.de/congress/2025/hub/event/detail/synth-meetup false 2025-12-29T10:00:00+01:00 10:00 01:30 Hardware Hacking Area -- Rear 39c3-solder-your-very-own-iot-pusheen-cat-lamp-with-wle en other Solder your very own IoT Pusheen Cat Lamp with WLED **Solder your very own IoT Pusheen Cat Lamp with WLED!** **Materials costs**: €70 **Taught by** Retia / Michael. **Workshop Itinerary**: Build the cutest IoT device on the network, and defend your home Wi-Fi! You will solder a custom PCB designed to light up and connect a Pusheen cat lamp. Once assembled, we will flash it with WLED, the industry-standard open-source software for controlling addressable LEDs. You’ll leave with a lamp you can control from your phone to display rainbows, fire effects, and notifications. It also doubles as a Wi-Fi defender, with firmware to detect and warn you of the presence of Wi-Fi jamming attacks! **Registration**: Buy a kit at the Hardware Hacking Area or website to guarantee a seat, or come by early! (And please do arrive early, regardless!) First come, first served. **Workshop Includes**: Pusheen Kit (Custom PCB & 3d printed base) Hoid (he/him) brandonpaiz https://events.ccc.de/congress/2025/hub/event/detail/solder-your-very-own-iot-pusheen-cat-lamp-with-wle false 2025-12-29T12:00:00+01:00 12:00 02:00 Hardware Hacking Area -- Rear 39c3-meshcore-meshtastic-for-hackers-set-up-config_hq6s en other Meshcore & Meshtastic for Hackers: Set up, Configure, & Deploy Nodes for Advanced Use **Meshcore & Meshtastic for Hackers: Set up, Configure, & Deploy Nodes for Advanced Use** **Materials costs**: €140 **Taught by** Retia / Kody. **Workshop Itinerary**: Meshcore is the future! Worldwide, Meshcore is overtaking Meshtastic as the regional LoRa mesh net of choice. Unlike Meshtastic, Meshcore scales well and supports reliable direct messaging. Meshcore is optimized for hackers, developers, or beginners who want deeper control. We will dive into Meshcore differences, setup and customization, and how to utilize the Nibble’s Flipper-Zero compatible expansion ports for sensors and peripherals. **Registration**: Buy a kit at the Hardware Hacking Area to guarantee a seat, or come by early! (And please do arrive early, regardless!) First come, first served. **Workshop Includes**: New Nibble Zero skickar koufax https://events.ccc.de/congress/2025/hub/event/detail/meshcore-meshtastic-for-hackers-set-up-config_hq6s false 2025-12-29T14:30:00+01:00 14:30 02:00 Hardware Hacking Area -- Rear 39c3-disarray-desnarler-diy-macropad_uogd en, de other Disarray Desnarler -- DIY Macropad **Disarray Desnarler -- DIY Macropad** **Materials costs**: €35 **Taught by** fablab|nk. The Desktopordnungsamt brings you "the world’s [#1](https://events.ccc.de/congress/2025/hub/tag/1) DIY customizable digital desktop organizer with re-chaotization feature that looks cool on your desk." We are Hillary, Julia, and Urs — the makers, programmers, designers, here to bring you this educational and fun kit. Contact us at ufogreeks@gmail.com with questions. **Workshop Itinerary**: ​In this 2-hour workshop, you are going to solder and flash your own macropad (aka. mini keyboard) and configure it to your personal requirements. No prior knowledge required. ​While our initial goal was to help people discover workspace management on their OS, you can customize your macropad however you like: favorite keyboard shortcuts, launch your favorite apps with one button, software control, or even as a MIDI (over USB) controller for your music equipment. * ​Here is some details about the project: https://hackaday.io/project/204536-disarray-desnarler If you want to look into the build- or codeside start here: https://github.com/ZenVega/disarray_desnarler_docs **Registration**: Buy a kit at the Hardware Hacking Area to guarantee a seat, or come by early! (And please do arrive early, regardless!) First come, first served. **Links**: [Hackaday article](https://hackaday.io/project/204536-disarray-desnarler) [Github docs](https://github.com/ZenVega/disarray_desnarler_docs) [QMK configs](https://github.com/ZenVega/qmk_disarray_desnarler/tree/main) [Insta](https://www.instagram.com/the.not.so.distant.future/) https://events.ccc.de/congress/2025/hub/https://usercontent.events.ccc.de/congress/2025/hub/usercontent/e/f100f842b4e9/blue_desnarler.jpg Mitch (he/him) https://events.ccc.de/congress/2025/hub/event/detail/disarray-desnarler-diy-macropad_uogd false 2025-12-29T17:00:00+01:00 17:00 02:00 Hardware Hacking Area -- Rear 39c3-cat-got-your-password-wi-fi-self-defense-for-_nsam en other Cat Got Your Password: Wi-Fi Self Defense For Beginners **Cat Got Your Password: Wi-Fi Self Defense For Beginners** **Materials costs**: €160 **Taught by** Retia / Nick & Kody . **Workshop Itinerary**: Cat got your password? In this class, you will use the Wi-Fi Nugget to learn how hackers attack wireless networks - and how to stop them. We will cover evil QR codes, extracting information like work and travel history from personal devices, Wi-Fi phishing attacks, and how to detect hacking tools like Wi-Fi pineapples. Most importantly, you will learn how to use the Nugget to physically "foxhunt" for suspicious Wi-Fi devices and secure your own home network against these common threats. **Registration**: Buy a kit at the Hardware Hacking Area or on the website to guarantee a seat, or come by early! (And please do arrive early, regardless!) First come, first served. **Workshop Includes**: Wi-Fi Nugget, Class Coupon, USB Cable skickar koufax https://events.ccc.de/congress/2025/hub/event/detail/cat-got-your-password-wi-fi-self-defense-for-_nsam false 2025-12-29T19:30:00+01:00 19:30 03:00 Hardware Hacking Area -- Rear 39c3-blonkenclick-the-esp32-16-segment-rgb-blinken-cloc en, de other Blonkenclick, the ESP32 16 segment RGB blinken clock **Blonkenclick, the ESP32 16 segment RGB blinken clock** **Materials costs**: €35 or €47 **Taught by** mazzoo. **Workshop Itinerary**: solder a beautiful RGB realtime clock with temperature sensor.  it's a begginner to medium level soldering kit. but not a beginner's kit. it's made up of an ESP32 running micropython (obviously you're free to run rust on an emulated 6502 if that's your kink!) and a RTC module and one of our large 6 digit digitus16 RGB displays of 16-segment displays. HW and SW are fully opensource in case you wonder =) [blonkenclick description](https://github.com/wenzellabs/blonkenclick) [digitus16 description](https://github.com/wenzellabs/digitus16) **Registration**: Buy a kit at the Hardware Hacking Area to guarantee a seat, or come by early! (And please do arrive early, regardless!) First come, first served. **Links**: mazzoo https://events.ccc.de/congress/2025/hub/event/detail/blonkenclick-the-esp32-16-segment-rgb-blinken-cloc false 2025-12-29T23:00:00+01:00 23:00 03:00 Hardware Hacking Area -- Rear 39c3-build-your-own-solar-powerd-lora-node en, de other Build your own solar powerd Lora node After three days of conference and talks, what better ways to wind out the day than to get together in a relaxed atmosphere and try to build some hardware? This workshop is intended for beginners who want to learn how to build their own lora/meshtastic/meshcore/reticulum hardware. These little devices can be used to message each other and build a network utilizing only some small antennas without the need of internet or a phone network. Together, we will build our own solar powered outside LORA nodes that can be used with mesh software such as Meshtastic, Meshcore or Reticulum without the need of a power outlet. We will bring the required parts and an easy to follow "how to" manual. There will be little to no input but we want to create a cozy atmosphere to come together to learn, to solder and teach ourselfs how to create our own communication devices from scratch (well at least almost). We will start at 23:00, feel free to stay until you are done or finish in on your own time. Each node will consist of a solar panel, a low power lora node (XIAO nRF52840 & Wio-SX1262 Kit), batteries, an antenna + other connecting components such as cables and a charging controller to make everything work together nicely. We have tried to keep the cost as low as possible so we used the cheapest components we found, for long term use you might want to upgrade some components. There will be only a limited amount of seats available. Please come to the hardware hacking area one hour (22:00) before this workshop starts to get the hardware (35€, cash preferred). This workshop is intended for beginners in Lora hardware and hardware hacking. Some previous soldering experience is helpful but not required. How to guide: https://cryptpad.fr/code/#/2/code/view/u1VaqnWs0jvLT6qRDUipwyGw4G4xOmyqymF20y4gLvc/embed/present/ mxtom https://events.ccc.de/congress/2025/hub/event/detail/build-your-own-solar-powerd-lora-node false 2025-12-29T14:00:00+01:00 14:00 02:00 Food Hacking Base 39c3-probiotic-makingcooking en other Probiotic making & cooking workshop [To secure spot on this workshop please sign in here.](https://dud-poll.inf.tu-dresden.de/pc_39c3/) Probiotic cooking is hands on workshop where we use high quality probiotic or by fermentation prepared ingredients creating variety of dishes. There are two main topics. One is to "discover" how much better dishes can be when you are using really high quality ingredients. The other is to share recipes and tricks to make these amazing dishes. Imagine for example making soup from kimchi, kimchi jjigae (김치찌개) or kimchi-jeon 김치전, dressing for salad using cidre vinegar aged for five years in oak barrel mixed with mirrabelle syrup made at 2019 ccc camp, soy sauce infused at cold with shiso ... Fhb will have a decent amount of good stock, if you can bring something good please do so, either for the workshop or for sharing and exchange. This workshop is based on "donation at your will no one turned away for lack of funds". Part of the workshop benefits goes towards fhb budget and hopefully larger part towards Algoldor's pocket to cover participation costs at 39c3 event and if some extras are accumulated, then towards current and future fermentation projects. algoldor https://events.ccc.de/congress/2025/hub/event/detail/probiotic-makingcooking false 2025-12-29T20:30:00+01:00 20:30 02:00 Food Hacking Base 39c3-fhb-cheese-rendezvous-1 en, de other The traditional cheese tasting! - Session 2 [To secure spot on the Session I. (Day 1, SAT 20h30) please sign in here](https://dud-poll.inf.tu-dresden.de/cheese1_39c3/) [To secure spot on the Session 2. (Day 3, MON 20h30) please sign in here.](https://dud-poll.inf.tu-dresden.de/cheese2_39c3/) Each cheese tasting session is open to 25 people max, please do sign in advance, you can just show up before the event but we are very likely going to be full for this one (like three times overbooked). If you can bring cheese which you made by yourself that would be great! Of course some specific local or extraordinary cheese/s or other related condiments like sun dried tomatoes, good quality olives, mustards, wine all would be appreciated. If you are bringing cheese please do label it well with at least it's name and type of milk used, your nick or name/contact would come handy too. The best would be of course to add short description to our wiki (please check the sample). Still please sign in in advance! FHB will be getting some high quality cheeses to offer basic selection with other samples surrounding it plus some basic condiments. Note that due to the interest in previous years we are going to run two sessions, each one lasting for about two hours or bit over. This event is based on donation at your will no one turned away for lack of funds. So lets meet all together again enjoying these lovely creations! Here you can find cheeses which are going to be present, please do add your ones and keep in mind that good half of the cheeses will be not listed here, they will just appear and they are worth of your attention! [A full overview of cheeses you can get here](https://foodhackingbase.org/wiki/FHB@39C3/Cheese_Rendezvous) vrs https://events.ccc.de/congress/2025/hub/event/detail/fhb-cheese-rendezvous-1 false 2025-12-29T19:30:00+01:00 19:30 02:00 Hardware Hacking Area -- Rear-middle 39c3-noisio-123rgb-vga-audio-protosynth en, de other Build your own 8 synthesizer at the noisio soldering workshop. For example, the Photonotron—a light-sensitive theremin that lets you create atmospheric sounds. Or the ATPC (ATtiny Punk Console), which can be used to digitally produce a wide variety of tones and noises. Also included is the Levitation Oscillator—an opulent 10-voice drone synthesizer—as well as one or two other kits from the noisio travel case. **noisio 8-bit synthesizers** **Materials costs**: €20 - €50 **Taught by** noisio. **Workshop Itinerary**: Solder yourself a synth from easy to peasy. No previous solder experiences are necessary. **Registration**: Buy a kit in the hours before the workshop at the Hardware Hacking Area to guarantee a seat, or come by early! (And please do arrive early, regardless!) First come, first served. **Links**: https://noisio.de/ https://events.ccc.de/congress/2025/hub/https://usercontent.events.ccc.de/congress/2025/hub/usercontent/e/198477fa2551/noisio_synthkits_x3.jpg Mitch (he/him) https://events.ccc.de/congress/2025/hub/event/detail/noisio-123rgb-vga-audio-protosynth false 2025-12-29T22:00:00+01:00 22:00 02:00 Hardware Hacking Area -- Rear-middle 39c3-soldering-sound-kits-with-alwin-day-1 en, de other Alwin/CircuitCircle Squeaking Rat & LDerroR **Alwin/CircuitCircle Squeaking Rat & LDerroR** **Materials costs**: €30 - €60 **Taught by** Alwin / CircuitCircle. **Workshop Itinerary**: **Registration**: Buy a kit at the Hardware Hacking Area to guarantee a seat, or come by early! (And please do arrive early, regardless!) First come, first served. **Links**: https://events.ccc.de/congress/2025/hub/event/detail/soldering-sound-kits-with-alwin-day-1 false 2025-12-29T13:00:00+01:00 13:00 01:30 Matrix Assembly 39c3-communicate-with-governments-with-matrix-ama-about de, en other Matrix als Kommunikations-Backbone für die Verwaltung "??!!" A Reality Check Between Ambition, Architecture, and Everyday Practice When a citizen wants to communicate with public authorities, the well-established classics are still available: fax, telephone, and email — supplemented by a growing number of inboxes, portals, and specialized messaging systems. Clarity is not exactly their defining feature. In Germany, FITKO, Saxony-Anhalt and Hamburg are attempting to bring some structure into this historically grown communication landscape through the ZaPuK project. The goal: fewer isolated solutions, more structure, more interoperability. (The fax is surprisingly persistent.) In this session, we take a sober, technical look at the following questions: * What can Matrix realistically deliver as a *general-purpose communication fabric* for public administration? * Where does the protocol fit well from an architectural perspective? * Where does it become interesting? * And where does theory collide with federal realities, domain-specific processes, and operational models? We discuss the current state of projects, discussions, and recommendations followed by an honest reality check. No marketing. No promises of salvation. But plenty of room for critical questions. Links: * https://gitlab.opencode.de/it-planungsrat/fit-ab/zapuk * [https://netzpolitik.org/2025/verwaltungsdigitalisierung-arbeitsgruppe-empfiehlt-matrix-protokoll-fuer-behoerdenkommunikation/](https://netzpolitik.org/2025/verwaltungsdigitalisierung-arbeitsgruppe-empfiehlt-matrix-protokoll-fuer-behoerdenkommunikation/) * [https://www.digdir.no/standarder/verdens-programvare-star-pa-skuldrene-til-apen-kildekode/7195](https://www.digdir.no/standarder/verdens-programvare-star-pa-skuldrene-til-apen-kildekode/7195) * [https://gitlab.opencode.de/fitko/matrix-g2x/](https://gitlab.opencode.de/fitko/matrix-g2x/) Yan 't' Minagawa https://events.ccc.de/congress/2025/hub/event/detail/communicate-with-governments-with-matrix-ama-about false 2025-12-29T17:00:00+01:00 17:00 00:56 Matrix Assembly 39c3-inofficial-sailfishos-user-meetup en, de other Different SailfishOS users meeting up and chatting Anyone welcome, even people who are just interested in SailfishOS. deepbluev7 https://events.ccc.de/congress/2025/hub/event/detail/inofficial-sailfishos-user-meetup false 2025-12-29T23:00:00+01:00 23:00 01:00 Matrix Assembly 39c3-promoting-homeservers-outside-the-default-matrixor en other Many client apps funnel their users signing up towards to matrix.org homeserver out of simplicity for the onbparding UX, meaning the decentralized public Matrix network practically has a big concentration on one server. In this session we explore what the Matrix Foundation could do to counter this effect. HarHarLinks https://events.ccc.de/congress/2025/hub/event/detail/promoting-homeservers-outside-the-default-matrixor false 2025-12-29T14:00:00+01:00 14:00 00:45 Call for Art: Workshopspace 2 39c3-disability-justice-art-as-praxis en other Workshop with Debra Guckenheimer Inspired by Canadian disabled artist Margeaux Feldman, this project is a practice of resisting ableism and other dehumanizing systemic oppressions. Debra Guckenheimer has taken discarded books and created collages to feature as a backdrop to an affirmation. The affirmation is a rejection of an ableist message she received with a disability justice message on the back. She has distributed over 100 postcards around the world to friends and strangers, who keep the postcard up to recite the affirmation as needed. Audience and artist together create change as they practice letting go of harm. This is Debra's first exhibit in Germany, the home of her grandparents until they fled in 1933, as Debra practices healing some of the trauma her ancestors experienced. This workshop is dedicated to the late disability justice Alice Wong and the ancestors of Debra who were murdered by Nazis. Attendees will receive a disability justice postcard (limited quantity available) to practice healing and resistance. https://events.ccc.de/congress/2025/hub/event/detail/disability-justice-art-as-praxis false 2025-12-29T16:00:00+01:00 16:00 03:00 Call for Art: Workshopspace 2 39c3-electronic-oscillators-for-organic-patterns-and-po other Workshop with Christian Faubel * DAY 2: 16:30 - 19:30 * DAY 3: 16:00 - 19:00 Performance DAY 4: art&play [tba] This is an advanced soldering workshop for creating motorcontrollers that bring motors to tap rhythmically with each other. Each participant builds her own board to drive two motors that will then tap in polyrhythms. The electronic circuits in this workshop derive from minimal and low-cost bio-inspired robots. Oscillators are used to drive motors that produce sound, but they can also be connected to synthesizers. Each circuit board is designed to be wired up with the boards from the other participants in order to explore together the magic of emergent polyrhythm by wiring their individual circuits to form a huge network. Big fun and deep dive into analog circuits and their emergent properties. Link: [https://christian.faubel.derstrudel.org](https://christian.faubel.derstrudel.org) Mastodon: [https://post.lurk.org/@derstrudel](https://post.lurk.org/@derstrudel) https://events.ccc.de/congress/2025/hub/event/detail/electronic-oscillators-for-organic-patterns-and-po false 2025-12-29T20:30:00+01:00 20:30 01:00 Call for Art: Workshopspace 2 39c3-trikkitt-polygen-hands-on_6rvi other PolyGen: Sehe dir das Innere der Geräte an, erfahre, wie sie funktionieren, und baue eines auseinander. Lerne, wie das Spiel funktioniert, und stelle alle Fragen, die du dazu hast. Artist: Trikkitt Genre: workshop PolyGen: See inside the units, see how they work, and get to pull one apart. Learn how the game works and ask any questions you have about it. Picture: PolyGen ©Trikkitt [https://gen.polyb.io](https://gen.polyb.io) https://events.ccc.de/congress/2025/hub/https://usercontent.events.ccc.de/congress/2025/hub/usercontent/e/11fee6e774b5/319-240-max.jpg Marty https://events.ccc.de/congress/2025/hub/event/detail/trikkitt-polygen-hands-on_6rvi false 2025-12-29T14:00:00+01:00 14:00 00:15 Jugend hackt Wohnzimmerbühne 39c3-long-term-support-bei-jugend-hackt-infos_0uay de Talk Bist du 14-21 Jahre alt und träumst davon, mit anderen ein größeres Projekt umzusetzen? Mit dem [Jugend hackt Long Term Support](https://jugendhackt.org/lts/) bekommst du 1 Jahr lang alle Unterstützung, die du brauchst, von Mentoring bis Materialkosten. In dieser Session gibt es Infos & Vernetzungsmöglichkeiten dazu. **Teil 1 (15min): Infos zum Long Term Support - diese Session** Ihr erfahrt alles zum [Jugend hackt Long Term Support](https://jugendhackt.org/lts/) für junge Projektgruppen im Alter von 14-21 Jahren: Jugend hackt unterstützt eure Projektideen nicht nur mit 3 Tagen Hackathon, sondern mit 365 Tagen Projektsupport. Der Long Term Support bietet Wochenenden mit der Projektgruppe, Beratung durch erfahrene Mentor\*innen, hilfreichen Input, spannende Workshops - und die Möglichkeit, Projektergebnisse auf dem Congress 2026 und dem Chaos Communication Camp 2027 zu präsentieren! **Teil 2 (45min): Vernetzung und Brainstorming für Projektideen - Session im Anschluss** Im Anschluss besteht die Möglichkeit für Interessierte, sich gleich mit anderen Junghacker\*innen, Aktivist\*innen, Ideenversprüher\*innen, verplanten Bastler\*innen und krass organisierten Planer\*innen zu vernetzen und eine Projektidee auf die Beine zu stellen. Denn Projektgruppen können sich noch bis zum 11.01.2026 mit ihren Projektideen für eine bessere Welt bewerben: [Hier geht es zur Anmeldung](https://anmeldung.alpaka.space/berlin/lts/). https://pretalx.chaos.jetzt/media/jugend/submissions/UL3PJJ/LTS-Rakete_F8A8PNL_piASR6C.png eliah https://events.ccc.de/congress/2025/hub/event/detail/long-term-support-bei-jugend-hackt-infos_0uay https://pretalx.chaos.jetzt/jugend/talk/UL3PJJ/ https://pretalx.chaos.jetzt/jugend/talk/UL3PJJ/feedback/ false 2025-12-29T14:15:00+01:00 14:15 00:45 Jugend hackt Wohnzimmerbühne 39c3-long-term-support-bei-jugend-hackt-vernetzung_lwpj de Workshop Bist du 14-21 Jahre alt und träumst davon, mit anderen ein größeres Projekt umzusetzen? Mit dem [Jugend hackt Long Term Support](https://jugendhackt.org/lts/) bekommst du 1 Jahr lang alle Unterstützung, die du brauchst, von Mentoring bis Materialkosten. In dieser Session gibt es Infos & Vernetzungsmöglichkeiten dazu. **Teil 2 (45min): Vernetzung und Brainstorming für Projektideen - diese Session** Im Anschluss besteht die Möglichkeit für Interessierte, sich gleich mit anderen Junghacker\*innen, Aktivist\*innen, Ideenversprüher\*innen, verplanten Bastler\*innen und krass organisierten Planer\*innen zu vernetzen und eine Projektidee auf die Beine zu stellen. Denn Projektgruppen können sich noch bis zum 11.01.2026 mit ihren Projektideen für eine bessere Welt bewerben: [Hier geht es zur Anmeldung](https://anmeldung.alpaka.space/berlin/lts/). **Teil 1 (15min): Infos zum Long Term Support - Session davor** Ihr erfahrt alles zum [Jugend hackt Long Term Support](https://jugendhackt.org/lts/) für junge Projektgruppen im Alter von 14-21 Jahren: Jugend hackt unterstützt eure Projektideen nicht nur mit 3 Tagen Hackathon, sondern mit 365 Tagen Projektsupport. Der Long Term Support bietet Wochenenden mit der Projektgruppe, Beratung durch erfahrene Mentor\*innen, hilfreichen Input, spannende Workshops - und die Möglichkeit, Projektergebnisse auf dem Congress 2026 und dem Chaos Communication Camp 2027 zu präsentieren! https://pretalx.chaos.jetzt/media/jugend/submissions/R9FMCA/LTS-Rakete_F8A8PNL_X2psxXW.png eliah https://events.ccc.de/congress/2025/hub/event/detail/long-term-support-bei-jugend-hackt-vernetzung_lwpj https://pretalx.chaos.jetzt/jugend/talk/R9FMCA/ https://pretalx.chaos.jetzt/jugend/talk/R9FMCA/feedback/ false 2025-12-29T16:00:00+01:00 16:00 01:00 Jugend hackt Wohnzimmerbühne 39c3-lightning-talks de, en other Wolltest du schon immer mal einen kurzen Lighning Talks bei Jugend hackt halten, jetzt ist deine Chance! Komm einfach vorbei und trag dich auf dem "Flipchart" ein You can give a lightning talk here on a topic of your choice, just drop by :) Nic(er/ihm) (he/him) https://events.ccc.de/congress/2025/hub/event/detail/lightning-talks false 2025-12-29T16:00:00+01:00 16:00 01:00 Jugend hackt Wohnzimmerbühne 39c3-lightning-talks_p49r de other Wolltest du schon immer mal einen kurzen Lighning Talks bei Jugend hackt halten, jetzt ist deine Chance! Komm einfach vorbei und trag dich auf dem "Flipchart" ein Du kannst hier einen Lighning Talk halten über ein Thema deiner Wahl, komm einfach vorbei :) Dimi https://events.ccc.de/congress/2025/hub/event/detail/lightning-talks_p49r false 2025-12-29T14:00:00+01:00 14:00 01:30 Art & Play: Bus Roof Top 39c3-pitch-power-zeichnen-machtdynamiken-sichtbar-mache other Zeichnen ist Denken und Sprechen zugleich. Nur mit den Händen. Es hilft uns auch beim Verstehen und Erklären von Machtverhältnissen. Und egal, was uns immer erzählt wurde. Wir alle können zeichnen. Also: Stift raus, Power an – let’s draw! Drawing is like thinking and speaking at the same time. Just with our hands. And it helps us to understand and explain power dynamics. And despite all that we were told: we all can draw. So: pens out, full power — let’s draw! [www.loufo.info](www.loufo.info) [www.justus.plus](www.justus.plus) Picture: ©Justus Pfeiffer https://events.ccc.de/congress/2025/hub/https://usercontent.events.ccc.de/congress/2025/hub/usercontent/e/43f25cfd11f1/768-1024-max.jpg Marty https://events.ccc.de/congress/2025/hub/event/detail/pitch-power-zeichnen-machtdynamiken-sichtbar-mache false 2025-12-29T16:30:00+01:00 16:30 02:00 Art & Play: Bus Roof Top 39c3-scrapergeist-zeitungsgedichte-in-retro-und-vi_c1n2 other Workshop mit Marcel Schneuer TAG 2: 14:00 - 16:00 TAG 3: 16:30 - 18:30 Computer magazines from the early 2000s, interviews with magical thinking, and the most creative ways to reassure shareholders. The tech industry is full of technoid dreams, advertisements for the future, and error messages in continuous text. In this workshop, we hack these archives analogously: we cut, collage, and remix the old pages into new, poetic forms. No prior knowledge is necessary. Scissors, glue and texts are provided (your own finds are welcome). The offered source material will be mostly in German. Link: [https://schneuer.online/blog/workshop-scrapergeist-beim-39c3/](https://schneuer.online/blog/workshop-scrapergeist-beim-39c3/) https://events.ccc.de/congress/2025/hub/https://usercontent.events.ccc.de/congress/2025/hub/usercontent/e/d88d3b8c0ba6/Scrapergeist_-_Zeitungsgedichte_in_retro_und_visionar_pixabay_von_Majid_Shahid.jpg Martha https://events.ccc.de/congress/2025/hub/event/detail/scrapergeist-zeitungsgedichte-in-retro-und-vi_c1n2 false 2025-12-29T14:00:00+01:00 14:00 02:00 Call for Art: Workshopspace 1 39c3-pixelprinting-with-bricks_62jn other Workshop with pixelprint * DAY 1: 14:30 - 16:30 * DAY 2: 14:00 - 16:00 * DAY 3: 14:00 - 16:00 We print with building block tiles, also known as Lego Dots™, on paper. There will be a short introduction to the printing technique and how to create the printing plates. We print using the primary colors and can mix any other color as needed. What makes Lego Dots™ exciting is that you are bound to a grid – in this case, 8×8 units. The tiles come in different shapes: circles, squares, quarter circles, and many more. Have a look at the gallery to see some examples. We print using a press from the Open Press Project. The print size is limited to 7×7 cm due to the press we are using. It is a “jump-in” workshop with no registration required – when one person leaves, the next can join in. Link: [https://pxlprnt.de](https://pxlprnt.de) https://events.ccc.de/congress/2025/hub/https://usercontent.events.ccc.de/congress/2025/hub/usercontent/e/85ca8dfc0e58/Pixelprint_ing_with_bricks_Klemmbausteine_Alain_Wohlfarth.jpg https://events.ccc.de/congress/2025/hub/event/detail/pixelprinting-with-bricks_62jn false 2025-12-29T17:30:00+01:00 17:30 02:00 Call for Art: Workshopspace 1 39c3-poetic-technologies-and-an-open-source-university other Visual assembly/Workshop with Nika Dubrovsky Universities have become debt traps. Education is no longer about learning—it's financial control dressed up as opportunity. Students graduate with crushing loans. Professors work precarious jobs. Administration consumes budgets that should fund actual learning. Knowledge is sold, credentialed, gatekept. But what if we could reimagine this completely? Not reform universities—redesign them from scratch. In this workshop, we're asking CCC participants to collectively design the university of our dreams. Not the university we think is "realistic" or "achievable within current constraints." The university we actually want. Here are the questions: Should it be distributed or centralized? Fully virtual or partially offline? How do we use open-source technologies to eliminate bullshit jobs, administration, and bureaucracy? How do we make education free, accessible, and democratic? Can a university exist without exams, without filtering students, accepting everyone who wants to learn? How do we build around open libraries—like David Graeber's music and book collections at davidgraeber.org—that anyone can modify and contribute to? How does this become not an institution, not a nation-state project, but a community of experimenters distributed globally? Ultimately, this is about technologies—survival technologies. Social technologies. Poetic technologies. https://events.ccc.de/congress/2025/hub/https://usercontent.events.ccc.de/congress/2025/hub/usercontent/e/d32242c10f60/Poetic_Technologies_and_an_open-source_university.jpeg https://events.ccc.de/congress/2025/hub/event/detail/poetic-technologies-and-an-open-source-university false 2025-12-29T20:30:00+01:00 20:30 01:30 Call for Art: Workshopspace 1 39c3-how-to-break-your-face-keeping-up-with-the-ar_4dyz en other Workshop with Anna Maria & Michelle Tylicki * DAY 1: 18:00 - 19:30 * DAY 2: 17:30 - 19:00 * DAY 3: 20:30 - 22:00 Facial recognition systems are rapidly advancing - fusing infrared, facial geometry, gait, and metadata into oppressive infrastructures of racist policing and surveillance capitalism. At the same time, artists, activists and everyday citizens are developing creative ways to interfere, confuse, and disappear from automated identification. #### Workshop 1: Break Your Face Hands-on demonstration of Dazzle anti-surveillance makeup techniques. Live-testing our work to understand machine vision -and how to break it. #### Workshop 2 + 3: Zine-making Starting with a discussion of creative anti-surveillance tactics, we then combine the workshop participants' knowledge and experience to co-creating a zine. Info: We will be using easily available live face filters on smart phones (instagram/snapchat/tiktok). Participants can use their own phones. The data is not uploaded or saved anywhere. Links: [www.michelletylicki.info/](www.michelletylicki.info/) [www.sanma.cargo.site/](www.sanma.cargo.site/) https://events.ccc.de/congress/2025/hub/https://usercontent.events.ccc.de/congress/2025/hub/usercontent/e/04c22591e4a5/HOW_TO_BRAK_YOUR_FACE_Anna_Maria.jpg https://events.ccc.de/congress/2025/hub/event/detail/how-to-break-your-face-keeping-up-with-the-ar_4dyz false 2025-12-29T14:00:00+01:00 14:00 01:30 Kidspace - Affenfelsen 39c3-hakeln-fur-anfanger de other Häkeln für Anfänger Stricken ... zwei Nadeln ... das klingt kompliziert. Reduzieren wir ... Häkeln ... nur eine Nadel ... schon besser ... oder? Wie war das gleich noch mal? Luftmaschen, Kettmaschen, feste Maschen ... doch zu kompliziert? Ich, elzbeth, bringe Wolle und ein paar Häkelnadeln mit und dann können wir versuchen das Rätsel der Maschen zu lösen und zumindest für den Anfang eine Kette zu produzieren. Ob ihr bereits Erfahrung habt oder noch nicht, kommt gerne vorbei. elzbeth https://events.ccc.de/congress/2025/hub/event/detail/hakeln-fur-anfanger false 2025-12-29T16:00:00+01:00 16:00 01:00 Kidspace - Affenfelsen 39c3-eltern-fragen-zum-anfangerschwimmen de, en other Eltern können ihre Kinder beim Schwimmenlernen mehr unterstützen als ihnen bewusst ist. Wir sprechen über ein paar Grundlagen, Ideen und spielerische Möglichkeiten. Egal ob übermütige oder ängstliche Kinder, mit den eigenen Eltern ist Wassergewöhnung oft leichter. Gerne werden Fragen beantwortet und Tipps zum Ausprobieren ausgetauscht. https://events.ccc.de/congress/2025/hub/event/detail/eltern-fragen-zum-anfangerschwimmen false 2025-12-29T19:00:00+01:00 19:00 00:30 Kidspace - Affenfelsen 39c3-guten8geschichte-das-neinhorn-und-der-geburtstag-t de other Mach es dir gemütlich und lausche einer zauberhaften Geschichte! An drei Abenden liest Nolo jeweils um 19:00 Uhr einen Teil aus Marc-Uwe Klings Neinhorn-Reihe als GuteN8Geschichte vor. This event will be held in German. Anyone who feels like enjoying a relaxed story time **Age**: 0+ **Just drop by and join us as we dive into the imaginative world of the Neinhorn!** **Duration:** approx. 30 minutes per evening ghenny https://events.ccc.de/congress/2025/hub/event/detail/guten8geschichte-das-neinhorn-und-der-geburtstag-t false 2025-12-29T12:00:00+01:00 12:00 01:00 CADUS Skill-Station 39c3-prepping-supply-richtig-kaufen de other begleitete Leseecke: Anhand rechter Primärquellen, wollen wir darüber sprechen, wie man solche erkennen kann It is repeatedly becoming public knowledge that the extreme right is also interested in the topic of prepping. However, this is not about a crisis preparedness based on solidarity, but about isolating and protecting their own ethnic families or the German "Volk". Far-right online. shops selling prepping supplies try to disguise themselves as harmless survival shops. We want to discuss how to recognize such shops and what exactly far-right crisis narratives are in an accompanied reading corner. You can take a look at the far-right crisis world through primary sources and ask questions or exchange ideas and experiences. https://events.ccc.de/congress/2025/hub/event/detail/prepping-supply-richtig-kaufen false 2025-12-29T13:00:00+01:00 13:00 00:30 CADUS Skill-Station 39c3-daily-tech-talk-cadus-academy-building-an-ope_c2ns de other Jeden Tag geben wir einen kurzen Einblick in den Aufbau der CADUS Academy: unserer offenen Lernplattform für medizinische, technische und psychosoziale Trainings. Wir zeigen, wo wir gerade stehen, welche Ideen wir verfolgen und wie die Community sich einbringen kann. Fragen, Feedback und spontaner Austausch ausdrücklich willkommen. Each day, we’ll give a short insight into the development of the CADUS Academy: our open learning platform for medical, technical, and psychosocial training. We’ll share where the project currently stands, the ideas shaping it, and how the community can get involved. Questions, feedback, and spontaneous discussions are warmly welcome. https://events.ccc.de/congress/2025/hub/event/detail/daily-tech-talk-cadus-academy-building-an-ope_c2ns false 2025-12-29T15:00:00+01:00 15:00 00:30 CADUS Skill-Station 39c3-cadus-x-off-grid-assembly de, en other The Off-Grid-Assembly introducing themselves! https://events.ccc.de/congress/2025/hub/event/detail/cadus-x-off-grid-assembly false 2025-12-29T16:00:00+01:00 16:00 00:45 CADUS Skill-Station 39c3-how-to-not-leak-too-much-reclaim-military-tools-fo de other In diesem Mini-Workshop lernt ihr, wie sich Methoden aus der Combat Medicine in den Alltag hacken lassen, um mit einfachen Mitteln gefährlichen Blutverlust schnell und effektiv zu stoppen. Most accidents happen at home — or in your hackspace — and sometimes the most useful methods come from rougher contexts. Many modern emergency techniques were developed for extreme situations, but we’re bringing them back into everyday life. In this mini-workshop, we’ll show you how to stop heavy bleeding with simple tools and why having a combat bandage in your backpack can actually be helpful. https://events.ccc.de/congress/2025/hub/event/detail/how-to-not-leak-too-much-reclaim-military-tools-fo false 2025-12-29T19:00:00+01:00 19:00 00:45 CADUS Skill-Station 39c3-well-prepared-still-larping de other Wir laden zum gemeinsamen Rumspinnen und Austausch ein: CADUS meets LARP. Im CADUS Assembly kommen wir zusammen, schnappen uns dann ein ruhiges Eckchen und quatschen darüber, wie spielerische Ansätze, Simulation und Community helfen können, gut vorbereitet durch Krisen zu gehen. Cozy, offen, ohne Agenda – einfach reden, zuhören, Ideen teilen. https://events.ccc.de/congress/2025/hub/event/detail/well-prepared-still-larping false 2025-12-29T20:00:00+01:00 20:00 01:00 CADUS Skill-Station 39c3-wetten-dass-du-das-nicht-im-schutzanzug-schaffst de other In dieser kleinen Show testet ihr in spielerischen Aufgaben, wie sehr Einsatzkleidung euch ausbremst, schützt oder im Weg steht. How heavy is a plate carrier really? How limited is your vision with a CBRN mask? And how complicated can a simple task become once you’re wearing operational gear? In our small “deployment gear challenge,” you can find out for yourself. We’ve prepared a set of playful tasks — some quick, some fiddly, some delightfully absurd. There are small prizes, plenty of laughs, and, along the way, a sense of how this gear slows you down, protects you, or sometimes just gets completely in the way. https://events.ccc.de/congress/2025/hub/event/detail/wetten-dass-du-das-nicht-im-schutzanzug-schaffst false 2025-12-29T10:30:00+01:00 10:30 01:00 Free Knowledge Habitat 39c3-search-engines-for-the-curious_bdbx en Workshop English version below, this Event will be in English. Du hast gerade erfahren, dass einige Chaoswesen in ihrer Freizeit an ihren eigenen Suchmaschinen basteln (lies: Websuche mit eigenem Index) und bist jetzt neugierig? Dieses Treffen soll diejenigen, die bereits Erfahrung mit dem Bau von Suchmaschinen haben, mit denjenigen zusammenbringen, die mehr darüber wissen wollen. Geplantes format ist eine kurze Vorstellung gefolgt von einem "ask me anything". Wesen, die auch Fragen zu dem Thema beantworten können sind willkommen (Bitt vorher Slatian bescheid geben). Wenn Du bereits an einer Suchmaschine gebastelt hast, könnte dich das [Search Engine Creators Meetup](https://events.ccc.de/congress/2025/hub/en/event/detail/search-engine-creators-meetup) interessieren. Das Event im 39c3 Hub: https://events.ccc.de/congress/2025/hub/en/event/detail/search-engines-for-the-curious English: You've just learned that some chaos-creatures tinker with their own search engines in their free time (as in real web search with its own index) and want to know more? This meetup aims to bring together those who already have experience building search engines with those who want to know more about that. Planned format is an "ask me anything". Creatures who want to answer questions are welcome (please contact Slatian in advance). The Event on the 39c3 Hub: https://events.ccc.de/congress/2025/hub/en/event/detail/search-engines-for-the-curious Slatian https://events.ccc.de/congress/2025/hub/event/detail/search-engines-for-the-curious_bdbx https://pretalx.wikimedia.de/39c3-2025/talk/H8VLAD/ false 2025-12-29T12:00:00+01:00 12:00 01:00 Free Knowledge Habitat 39c3-einfuhrung-sparql-wikidata-query-service de Talk Einführung in den Wikidata Query Service und die SPARQL-Abfragesprache. Mit dem Wikidata Query Service kann man ganz viele interessante Daten aus Wikidata ziehen – hier finden wir heraus, wie das geht. Andrew McAllister Lucas Werkmeister https://events.ccc.de/congress/2025/hub/event/detail/einfuhrung-sparql-wikidata-query-service https://pretalx.wikimedia.de/39c3-2025/talk/7HWBNK/ false 2025-12-29T13:15:00+01:00 13:15 01:00 Free Knowledge Habitat 39c3-wikidata-und-kolonialismus-in-daten de Workshop Daten sind nicht neutral! In diesem Workshop geht es um die Sensibilisierung für kolonial geprägtes Wissen in Katalogen, Datenbanken und offenen Plattformen und dem gemeinsamen Üben anhand von Datenmodellierung in Wikidata. Cin Pietschmann Lukas Fuchsgruber https://events.ccc.de/congress/2025/hub/event/detail/wikidata-und-kolonialismus-in-daten https://pretalx.wikimedia.de/39c3-2025/talk/JTYHFA/ false 2025-12-29T14:30:00+01:00 14:30 01:00 Free Knowledge Habitat 39c3-wikidata-and-colonialism-in-data en Workshop Data is not neutral! This workshop aims to raise awareness of colonial influences on knowledge in catalogs, databases, and open platforms, and to provide joint practice using data modeling in Wikidata. Cin Pietschmann Lukas Fuchsgruber https://events.ccc.de/congress/2025/hub/event/detail/wikidata-and-colonialism-in-data https://pretalx.wikimedia.de/39c3-2025/talk/SZMDAU/ false 2025-12-29T16:00:00+01:00 16:00 01:00 Free Knowledge Habitat 39c3-ask-me-anything-internet-governance_guqe en Workshop Internet Governance beeinflusst, wie offen, sicher und zugänglich das Internet ist – von technischen Standards über Plattformregulierung bis hin zu Fragen von Macht und Teilhabe. In diesem interaktiven Ask Me Anything-Workshop laden wir Teilnehmende dazu ein, ihre Fragen, Zweifel und Kritik rund um Internet Governance einzubringen (unabhängig von Vorwissen). Der Workshop bietet einen niedrigschwelligen Einstieg in zentrale Akteure, Prozesse und Konfliktlinien der Internet Governance (z. B. Multistakeholder-Ansatz, Staaten vs. Tech-Konzerne, Global Digital Compact, WSIS, IETF, ICANN, W3C; und noch viel mehr Abkürzungen). Gleichzeitig ist Raum für vertiefende Diskussionen, persönliche Erfahrungen und aktuelle politische Aushandlungen. Ziel ist es, Internet Governance entmystifizieren, Machtstrukturen sichtbar zu machen und gemeinsam zu diskutieren, wie eine gerechtere und inklusivere digitale Zukunft aussehen kann. Sophia Longwe Ben Burmeister Friederike von Franqué https://events.ccc.de/congress/2025/hub/event/detail/ask-me-anything-internet-governance_guqe https://pretalx.wikimedia.de/39c3-2025/talk/NYT7YQ/ false 2025-12-29T17:15:00+01:00 17:15 01:00 Free Knowledge Habitat 39c3-fragdenstaat-nutzerinnen-treffen de Workshop Eine offene Austauschrunde mit dem FragDenStaat-Team sowie allen FragDenStaat-Nutzer*innen sowie allen, die es werden wollen. Kara https://events.ccc.de/congress/2025/hub/event/detail/fragdenstaat-nutzerinnen-treffen https://pretalx.wikimedia.de/39c3-2025/talk/X88PYJ/ false 2025-12-29T19:15:00+01:00 19:15 02:30 Free Knowledge Habitat 39c3-bingo_4zbp de Workshop Spiele unser jährliches Bingo mit uns! ------ Play our annual bingo with us! Komm vorbei und spiele das allseits bekannte und beliebte Bingo mit uns. ------- Come by and play the annual bingo at the Free Knowledge Habitat with us. Merle Kara https://events.ccc.de/congress/2025/hub/event/detail/bingo_4zbp https://pretalx.wikimedia.de/39c3-2025/talk/BKHNTR/ false 2025-12-29T22:00:00+01:00 22:00 01:00 Free Knowledge Habitat 39c3-media-needing-categories-wir-raumen-auf de Workshop Wir räumen gemeinsam nicht kategorisierte Dateien auf Wikimedia Commons auf! Du hast keine Ahnung, was das bedeutet? Im Medienarchiv Wikimedia Commons gibt es viele Inhalte, die nicht maschinenlesbar beschrieben sind. Wir begeben uns auf diese Halde und sortieren die Inhalte an der richtigen Stelle ein. Vorkenntnisse sind nicht erforderlich. Optional für alle mit Wikimedia-Account: Anmeldung für das Wiki-Event: https://commons.wikimedia.org/wiki/Event:39C3_-_Media_needing_categories:_Wir_r%C3%A4umen_auf! GPSLeo https://events.ccc.de/congress/2025/hub/event/detail/media-needing-categories-wir-raumen-auf https://pretalx.wikimedia.de/39c3-2025/talk/EWLG7U/ false 2025-12-29T12:00:00+01:00 12:00 01:50 Bits&Bäume Living Room 39c3-p4p-meet-greet en Workshop 110 Minutes This is a meet-and-greet for Peer-4-Peer projects (local-first, P2P, OSS and offline-first). Join to say hello to old and new peers and catch the latest gossip of the networks. The beginning will be a free-flowing hang out with origami & tea during followed by a mini workshop where participants get to know each other and the latest updates in the scene. Image is revised through color change and added text. Original image source is CC-2.0-Generic via https://commons.wikimedia.org/wiki/File:Rhizomorph_(5211991289).jpg https://pretalx.freifunktag.de/media/39c3-bub-workshops-2025/submissions/CNZ9AP/P4P-Meetup_rcTKZJY.png Mathias zelf https://events.ccc.de/congress/2025/hub/event/detail/p4p-meet-greet https://pretalx.freifunktag.de/39c3-bub-workshops-2025/talk/CNZ9AP/ true 2025-12-29T14:00:00+01:00 14:00 00:50 Bits&Bäume Living Room 39c3-qa-device-neutrality-free-software-and-fsfes-litig en Workshop 50 Minutes Do you want to learn more about Device Neutrality and its implications for user freedom and Free Software? Would you like to learn more about the Digital Markets Act and its implications for Free Software within the EU? Did you know that the Free Software Foundation Europe is litigating against Apple? This session aims to answer all your questions around this topic in a friendly and chill environment, together with FSFE team members, volunteers and curious creatures. Join us for an accessible and relaxed session exploring Device Neutrality, user freedom, and the role of Free Software in today’s digital landscape. Learn how the EU’s Digital Markets Act affects Free Software and discover why the Free Software Foundation Europe is taking legal action against Apple. FSFE team members and volunteers will be on hand to answer questions, share insights, and discuss these issues with curious creatures of all backgrounds. No technical knowledge is required. Dario Presutti https://events.ccc.de/congress/2025/hub/event/detail/qa-device-neutrality-free-software-and-fsfes-litig https://pretalx.freifunktag.de/39c3-bub-workshops-2025/talk/QWVWCN/ false 2025-12-29T15:00:00+01:00 15:00 00:50 Bits&Bäume Living Room 39c3-digital-humanities-meetup de Meetup 50 Minutes Digital Humanities: Forschung in den Geisteswissenschaften in digitaler Form, kurz: DH. Wir treffen uns zu einem lockeren Kennenlernen und Gedankenaustausch. Was ist Euer Interesse an den DH, wo verortet Ihr Euch in der Chaosfamilie? Welche Themen des 39C3 könnten für die DH relevant sein - und umgekehrt? Digital Humanities: Forschung zu Literatur, Geschichte, Sprache, Kunst, Musik in digitaler Form - von Rechercheprozessen über Analysemethoden bis hin zu Publikationsformen. Als Brückendisziplin zwischen IT und geisteswissenschaftlichen Fächern operieren die "DH" aber nicht nur anwendungsbezogen, sondern auch transformativ: Sie evaluieren kritisch im Diskurs, welche Aspekte der fortlaufenden Digitalisierung für die wissenschaftliche Praxis förderlich genutzt werden können. Damit sorgen sie aber auch stets für Aufregung, wenn es darum geht, etablierte wissenschaftliche Prozesse zu stören: Etwa, wenn es um Open Source, Open Science, Open Data geht sowie um FAIR- und CARE-Prinzipien oder um nichtproprietäre Standards. Wir begleiten als Digital Humanists somit nicht nur die Digitalisierung von Kulturdokumenten und Wissenschaft(sbürokratie), sondern auch von Arbeitsprozessen mit dem Ziel, in diesem Zuge auch eine freiere, fairere, nachhaltigere, zugänglichere, offenere und digitalsouveränere Wissenschaftspraxis zu etablieren. Wir schließen an die Meetups der letzten beiden Jahre an und treffen uns wieder zu einem lockeren Kennenlernen und Gedankenaustausch (siehe unser Pad dazu: https://etherpad.wikimedia.org/p/DHMeetup). Willkommen sind alle, die an den DH interessiert sind - und vermutlich sind viele bereits in der Chaos-Familie, ohne dass wir voneinander wissen. Wo in der Chaos-Familie verortet Ihr Euch? Welche Themen des 39C3 könnten für die DH relevant sein und umgekehrt? Kommt zahlreich! Nach Bedarf können wir weitere Meetups oder SoS zu spezifischen Themen organisieren. Ulrike Wuttke Torsten Roeder https://events.ccc.de/congress/2025/hub/event/detail/digital-humanities-meetup https://pretalx.freifunktag.de/39c3-bub-workshops-2025/talk/CAN9JP/ true 2025-12-29T16:00:00+01:00 16:00 00:50 Bits&Bäume Living Room 39c3-p2panda-project-updates-meetup en Workshop 50 Minutes A lot has happened in [p2panda](https://p2panda.org) land this year (Group Encryption, Confidential Discovery & Sync, a new networking stack, Access Control CRDT, [Reflection](https://github.com/p2panda/reflection) text editor in GTK, founding of the [Modal](https://modal.cx/) collective, [DWeb Seminar](https://dwebseminar.org), [Walkaway lectures](https://pads.offline.place/p/r.06dda241c03ad92f2a55c47f4bbdd419) and more!) and there's a lot planned for next year (high-level interfaces, p2panda-node and -client and a system service)! This session is a chance to catch up on the latest news and plans with a 20~ min update in the beginning and then have time to ask questions and discuss all things around p2panda. p2panda is a collection of building blocks to build p2p / local-first applications with radical decentralization, walkaway and privacy as a focus. https://pretalx.freifunktag.de/media/39c3-bub-workshops-2025/submissions/TKNUDC/2511_ekpwzzi.png adz https://events.ccc.de/congress/2025/hub/event/detail/p2panda-project-updates-meetup https://pretalx.freifunktag.de/39c3-bub-workshops-2025/talk/TKNUDC/ false 2025-12-29T17:00:00+01:00 17:00 00:50 Bits&Bäume Living Room 39c3-fur-eine-nachhaltige-global-gerechte-digitalisieru de Meetup 50 Minutes Du bist schon Teil von Bits & Bäume oder interessierst dich Bits & Bäume kennen zu lernen? Komm beim Täglichen Meetup zum Austausch und Vernetzen zu Themen globaler Gerechtigkeit und digitaler Selbstbestimmtheit. Du bist schon Teil von Bits & Bäume oder interessierst dich Bits & Bäume kennen zu lernen? Komm beim Täglichen Meetup zum Austausch und Vernetzen zu Themen globaler Gerechtigkeit und digitaler Selbstbestimmtheit. https://pretalx.freifunktag.de/media/39c3-bub-workshops-2025/submissions/8YJEDJ/38c3-wohnzimmer-lounge_ieYYig4.jpg benks https://events.ccc.de/congress/2025/hub/event/detail/fur-eine-nachhaltige-global-gerechte-digitalisieru https://pretalx.freifunktag.de/39c3-bub-workshops-2025/talk/8YJEDJ/ false 2025-12-29T16:00:00+01:00 16:00 01:30 OGM Workshop Space 39c3-mesh-radio-workshop en, de other Let's build mesh radios from scratch.We will bring 20 PCB kits, containing all parts. Soldering is difficult but doable in the Congress. You have to be very proficient with soldering to get this done during Congress, but the Eternal Soldering Workshop is open and nearby.We also have solder paste and stencils for the real pros!If you don't want to get into soldering now, you can take one of the kits home. During the workshop you will get to know everything necessary to get the job done. ### Building Autonomy: Mesh Radio Hardware Workshop Decentralized communication infrastructures require more than finished devices: understanding the hardware level enables critical engagement with proprietary designs and creates autonomy beyond commercial dependencies. The workshop covers complete assembly of an nRF52-based mesh node in Heltec form-factor, where participants gain practical comprehension of decentralized radio network architecture through soldering components, integrating LoRa modules, and installing firmware. Critical decentralization means not merely using distributed networks but mastering their technical foundations: building custom boards reveals trade-offs between energy efficiency, range, and cost, enables design adaptation to specific requirements, and develops capabilities for repairing and modifying existing infrastructure. Control over hardware design and firmware variants dissolves dependence on manufacturer decisions and permits experimental topologies that commercial solutions cannot accommodate. The workshop targets advanced participants with mesh operation experience, as technical fundamentals are prerequisite knowledge. **Prerequisites:** Operational experience with mesh nodes (advanced) **Materials:** PCB kits available, pricing will be announced https://events.ccc.de/congress/2025/hub/https://usercontent.events.ccc.de/congress/2025/hub/usercontent/e/d97e2ed23f72/boxes.jpg jitter (this,that) https://events.ccc.de/congress/2025/hub/event/detail/mesh-radio-workshop false 2025-12-29T12:00:00+01:00 12:00 12:00 SegFaultDragons Assembly 39c3-soldering-competition-day-3 de, en other Hand soldering competition This is a smd hand soldering competition - the goal is to solder a Winkekatze with some LED lights in the shortest time possible. Every contestant keeps the board and the overall top 3 win a prize. Contestants are expected to have smd soldering experience - beginners will not be able to finish within 90 minutes. For more details check out the competition's website: https://handsolderingcompetition.de/ https://events.ccc.de/congress/2025/hub/event/detail/soldering-competition-day-3 false 2025-12-29T14:00:00+01:00 14:00 01:30 KinkyGeeks Assembly 39c3-selbstgemachtes-leid-die-kinkygeeks-bastelwer_0j14 de, en other Bastelrunde für kinky Stuff We have prepared small craft kits that you can make during this time. You can choose between two different spanking tools, and you can also paint small tags made of shrink wrap, e.g., for collars or similar items. No registration necessary, just come by and see if there is a spot available. There are material costs of 0-5 €, depending on the set. raven (she/her) https://events.ccc.de/congress/2025/hub/event/detail/selbstgemachtes-leid-die-kinkygeeks-bastelwer_0j14 false 2025-12-29T18:30:00+01:00 18:30 01:00 Vegan Chaos Assembly 39c3-vegan-chaos-lets-talk-day-3 de, en other Komm vorbei und lasst uns in unserer Assembly quatschen! Dies ist die Zeit, wo die Community zusammenkommt, wo Interessierte stressfrei Fragen stellen können, oder auch nur einfach ein Getränk miteinander getrunken werden kann. **Come by and let's chat at our assembly!** This is the time when the community comes together, when anyone interested can ask questions in a relaxed atmosphere, or just enjoy a drink together. Like-minded people, curious minds, motivated individuals, interested parties and many more meet here. Let's connect, all creatures are welcome! ### More Information: - To the **[Vegan Chaos Community Assembly](https://events.ccc.de/congress/2025/hub/en/assembly/detail/vegan_chaos)** - Follow us at Mastodon: **[@vegan@chaos.social](//chaos.social/@vegan)** ### Our Events: - 27.12. | 13:00 | Room D | **[Vegan Chaos: Welcome Meet & Greet](https://events.ccc.de/congress/2025/hub/en/event/detail/vegan-chaos-welcome-meet-greet_zdm4)** - 27.12. | 20:30 | Assembly | **[Vegan Chaos: Let's Talk](https://events.ccc.de/congress/2025/hub/en/event/detail/vegan-chaos-lets-talk-day-1)** - 28.12. | 11:30 | Assembly | **[Vegan Chaos: Let's Talk](https://events.ccc.de/congress/2025/hub/en/event/detail/vegan-chaos-lets-talk-day-2)** - 29.12. | 13:00 | Room D | **[Vegan Chaos: Bring-Along Fingerfood Brunch](https://events.ccc.de/congress/2025/hub/en/event/detail/vegan-chaos-bring-along-fingerfood-brunch)** - 29.12. | 18:30 | Assembly | **[Vegan Chaos: Let's Talk](https://events.ccc.de/congress/2025/hub/en/event/detail/vegan-chaos-lets-talk-day-3)** - 30.12. | 11:00 | Room 6 | **[Vegan Chaos: Farewell Meeting](https://events.ccc.de/congress/2025/hub/en/event/detail/vegan-chaos-farewell-meeting)** https://events.ccc.de/congress/2025/hub/https://usercontent.events.ccc.de/congress/2025/hub/usercontent/e/918d60965337/39C3veganchaos-kl.png ganzesaetze (he/him) https://events.ccc.de/congress/2025/hub/event/detail/vegan-chaos-lets-talk-day-3 false 2025-12-29T10:30:00+01:00 10:30 00:45 Fediverse shared table 39c3-alternative-nutzungsweisen-von-microblogging de other When people say Mastodon, they often mean Fediverse—on the one hand because Mastodon represents a mainstream within the Fediverse, but on the other hand because even microblogging usage patterns can vary greatly and even within Mastodon there is no uniform usage pattern, which can make Mastodon seem confusing as a term. Automated posting of RSS feeds, personal exchanges with a closed community, global networking with peers from all over the world, or individual card index boxes—we categorize different ways of using the platform and draw inspiration from unusual approaches to uncover the relevance and potential of Fediverse. https://events.ccc.de/congress/2025/hub/https://usercontent.events.ccc.de/congress/2025/hub/usercontent/e/b4a21c7a2ac0/altnutzung.png sozialwelten (er/ihn) https://events.ccc.de/congress/2025/hub/event/detail/alternative-nutzungsweisen-von-microblogging false 2025-12-29T11:15:00+01:00 11:15 00:45 Fediverse shared table 39c3-fediverse-als-business-grundungsideen-und-ges_oe1t de other At Chaos Communication Camp 2023, padeluun called for the establishment of small, exciting companies. Digitalcourage operates a Fediverse instance that is financed by membership fees. In addition, there are commercial hosting services such as masto.host and Ossrox. What else is there, and what else is conceivable in the future? We discuss Fediverse business ideas, start-up assistance for company foundations (business plans, KfW start-up loans) and everything that can make the Fediverse an economic basis for founders. A workshop for gathering ideas, exchanging experiences and developing joint approaches. Recording of the presentation by padeluun 2023: https://media.ccc.de/v/camp2023-57118-fediverse https://events.ccc.de/congress/2025/hub/https://usercontent.events.ccc.de/congress/2025/hub/usercontent/e/bb3ad6fdbbe8/fedihive.png sozialwelten (er/ihn) https://events.ccc.de/congress/2025/hub/event/detail/fediverse-als-business-grundungsideen-und-ges_oe1t false 2025-12-29T14:00:00+01:00 14:00 01:00 Fediverse shared table 39c3-lessons-from-a-public-university-bringing-institut en other What happens when a public university decides to use the Fediverse as part of a whole strategic approach to science communication? I’ll share honest lessons from our work at the University of Innsbruck, including insights from our Open Science Communication position paper https://www.uibk.ac.at/de/public-relations/kommunikation/open-science-communication/. We’ll talk about what actually helped, what didn’t, and how Wikimedia projects like Wikipedia and Wikimedia Commons fit into the strategy. This isn’t a polished success story—it’s an open exchange about what it really takes to get institutions comfortable with decentralized platforms. All interested in this topic very welcome. No special Melanie Bartos runs the Open Platforms and Fediverse initiative at the University of Innsbruck. melbartos https://events.ccc.de/congress/2025/hub/event/detail/lessons-from-a-public-university-bringing-institut false 2025-12-29T15:00:00+01:00 15:00 00:55 Fediverse shared table 39c3-was-hat-das-fediverse-eigentlich-zu-bieten-wenn-da de, en other Wenn wir (ich?) über das Fediverse sprechen, dann ist es meist ein Ort in dem Datenschutz und Digitale Souveränität wichtig sind. Was hat das Fediverse Menschen zu bieten für die diese Aspekte mehr oder minder egal sind? In this workshop I want to work together with you on the question - what does the Fediverse offer for people not interested to run their own server or which software the software running on the server is written in. What makes the Fediverse interesting for people outside of our bubble. The results of the workshop will be published so that all ambassadors of the Fediverse can use them afterwards in their work promoting the Fediverse. bAvatar https://events.ccc.de/congress/2025/hub/event/detail/was-hat-das-fediverse-eigentlich-zu-bieten-wenn-da false 2025-12-29T16:00:00+01:00 16:00 01:00 Fediverse shared table 39c3-peertube-meetup de other Wir wollen uns austauschen, um langfristig stabile PeerTube-Instanzen selber zu betreiben. What challenges arise when operating your own Peertube instance? https://events.ccc.de/congress/2025/hub/https://usercontent.events.ccc.de/congress/2025/hub/usercontent/e/c007c235460f/Unbenannt.jpg MoniKa (c4E) (she/her) https://events.ccc.de/congress/2025/hub/event/detail/peertube-meetup false 2025-12-29T17:00:00+01:00 17:00 01:00 Fediverse shared table 39c3-fediday-2026-ruckblicke-und-ausblicke-fediday-2026 de, en other Here is a review of the first and second Berlin Fediverse Days. We have now held two conferences and are already planning the third. We are Europe's largest conference on the Fediverse, and perhaps even the world's largest. We look back, answer your questions and look ahead. Because after the second Berlin Fediverse Day comes the third Berlin Fediverse Day. https://events.ccc.de/congress/2025/hub/https://usercontent.events.ccc.de/congress/2025/hub/usercontent/e/381d5311bab2/fedi39c3.png e-punc (der / he) poo samvie vgrass https://events.ccc.de/congress/2025/hub/event/detail/fediday-2026-ruckblicke-und-ausblicke-fediday-2026 false 2025-12-29T13:00:00+01:00 13:00 01:00 cyber4EDU und Datenschutzheinis Assembly (c4E-Roundtable) 39c3-datenschutz-sprechstunde de other Kleine Datenschutz-Sprechstunde für eure Fragen an Mitarbeitende von Datenschutzaufsichtsbehörden. You want to know how a Data Protection-Fine is issued? Or why Ireland plays such a big role in EU Data Protection? People who work in Data protection supervisory authorities have once again joined forces to answer your questions and get to talk about the data protection topics that you are interested in. Don't hesitate to ask us anything related to data protection or working in a supervisory authority. We are eager to get to talk with you. Alvar https://events.ccc.de/congress/2025/hub/event/detail/datenschutz-sprechstunde false 2025-12-29T15:00:00+01:00 15:00 01:00 cyber4EDU und Datenschutzheinis Assembly (c4E-Roundtable) 39c3-analoge-computer de other Wie sieht ein Analog Computer aus, wie funktioniert er? max. 6 Teilnehmende pnrd https://events.ccc.de/congress/2025/hub/event/detail/analoge-computer false 2025-12-29T16:00:00+01:00 16:00 01:30 Kidspace - Basteltische 39c3-nerds-spielen-spiele-tag-3 de, en other Nerds spielen Spiele Du hast gerade nichts zu tun, brauchst eine kleine Entspannungszeit oder suchst einfach ein wenig Spaß mit anderen? Spiel doch einfach mit! Jeder ist willkommen! Denn was tun Nerds, wenn sie gerade nichts hacken? Sie spielen Spiele! monsterchen https://events.ccc.de/congress/2025/hub/event/detail/nerds-spielen-spiele-tag-3 false 2025-12-29T12:15:00+01:00 12:15 00:10 [hsmr] 39c3-signal-matrix-contact-verification-meeting de, en other Welcome to our modern ‘key signing’ session: We invite you to exchange contacts via Signal, Matrix and Threema and to verify each other's chat sessions. This ensures that no ‘person in the middle’ is reading along. Welcome to our modern ‘key signing’ session: We invite you to exchange contacts via Signal, Matrix and Threema and to verify each other's chat sessions. This ensures that no ‘person in the middle’ is reading along. We at [hsmr] and MaZe are using the opportunity that many of us are present at the same time to verify each other. However, all other creatures are also welcome to join. We are happy to help if this is your first time hearing about contact verification. langfingaz (he/him) https://events.ccc.de/congress/2025/hub/event/detail/signal-matrix-contact-verification-meeting false 2025-12-29T14:00:00+01:00 14:00 00:25 [hsmr] 39c3-reluks-unattended-power-cycles-for-your-fde-server en, de other With re:luks your full disk encrypted (FDE) server can be rebooted automatically - no need to manually enter the disk encryption passphrase. One of the annoyances of full disk encryption (FDE) is that a reboot (which might be necessary after system updates) requires the disk passphrase to be entered. re:luks solves this problem by using a second FDE server for mutal reboots. The solution follows the KISS principle and consists of a short Python script. If you want to keep your server up-to-date and don't want to sacrifice disk encryption or convenience, then this short project presentation might be for you! Let's increase the power cycle count of our FDE servers by automating the reboot process! Slides: https://md.privacy1st.de/p/pty3inm4z0#/ langfingaz (he/him) https://events.ccc.de/congress/2025/hub/event/detail/reluks-unattended-power-cycles-for-your-fde-server false 2025-12-29T14:00:00+01:00 14:00 01:00 TBD small 39c3-possibly-tbd-friends-badge-soldering-workshop en, de other possibly TBD friends badge soldering workshop https://github.com/hackwinkel/ There may still be some version 1.5 and version 2.0 TBD friends badges left to solder. Badges contain blinking lights and 2-way communication, so the badge can tell you if there are friends around that also wear their TBD friends badge. Soldering is done using solder paste and a hotplate. Takes about 1 hour for beginners (which mainly depends on my divergence when I talk you through it). Record time is 12 minutes. Badges are donation-ware - Pay whatever you like. Materials costs are currently about 2 euro https://github.com/hackwinkel/ https://events.ccc.de/congress/2025/hub/https://usercontent.events.ccc.de/congress/2025/hub/usercontent/e/e10a9cdcff3c/tbdbadge.png the0 (he his him) https://events.ccc.de/congress/2025/hub/event/detail/possibly-tbd-friends-badge-soldering-workshop false 2025-12-29T14:00:00+01:00 14:00 02:00 Kidspace - Tisch vor Saal B 39c3-geschichten-erzahlen-tag-3-zauberschule-schatzjagd de other Zauberschule: Schatzjagd Ihr braucht noch eine Projektarbeit in Geschichte der Magie, und deshalb buddelt ihr alte Ruinen aus. (Rollenspiel ohne Regelsystem, 2 Stunden, bis zu 6 Leute, auf Deutsch) Cisz (er, he) https://events.ccc.de/congress/2025/hub/event/detail/geschichten-erzahlen-tag-3-zauberschule-schatzjagd false 2025-12-29T16:00:00+01:00 16:00 01:00 Kidspace - Tisch vor Saal B 39c3-papierbasteln-tag-3 de other Eine kleine Tropeninsel (1 Stunde, Material und Werkzeug sind vorhanden) Cisz (er, he) https://events.ccc.de/congress/2025/hub/event/detail/papierbasteln-tag-3 false 2025-12-29T15:00:00+01:00 15:00 00:30 ShapeIt 39c3-shapeit-open-source-3d-modeller de, en other Let me introduce you to ShapeIt — an open-source CAD application developed by me, Gerhard. Let me introduce you to ShapeIt — an open-source CAD application developed by me, Gerhard. Are you interested in getting involved? Feel free to join us! Whether you simply want to try out ShapeIt or actively contribute to its development, you are very welcome. Current areas of work include platform independence, user experience testing, the plugin interface, STL reverse engineering, and SVG import. https://github.com/FriendsOfCADability/CADability Note: This workshop is held by Gerhard, who has no Hub-account. Not by langfingaz ;) https://events.ccc.de/congress/2025/hub/https://usercontent.events.ccc.de/congress/2025/hub/usercontent/e/5240d551e646/signal-2025-12-28-183220_002_x.jpg langfingaz (he/him) https://events.ccc.de/congress/2025/hub/event/detail/shapeit-open-source-3d-modeller false 2025-12-29T11:00:00+01:00 11:00 05:00 Kidspace - Elektrotisch 39c3-elektrobausteine-tag-3 de, en other Elektrobausteine/Electric circuits with building blocks Make light sound or mechanical circuits. The electronic building blocks from OEM Dbolo are not only especially child-friendly due to their simple push-button connections but also a lot of fun for all ages. They are distributed by various brands, including "Kosmos Easy" and "Elenco Snap Circuits." No prior knowledge of electricity is required, but beware - learning something might happen! This is an open parent-child activity. Learn, build, and play together, and take care for arguments and that the parts don’t fall on the floor. Teenagers and adults are also welcome without child accompaniment. ;-) https://events.ccc.de/congress/2025/hub/event/detail/elektrobausteine-tag-3 false 2025-12-29T14:00:00+01:00 14:00 00:45 CADUS WASH-Station 39c3-wash-sprechstunde_aflz de, en other CADUS WASH Station – Water, Sanitation, and Hygiene A compact insight into water treatment in action: with a water filter system, small water laboratory, and short WASH consultation hours. To look at, touch, and ask questions. Come to our regular WASH consultation hours, ask your questions, and get a practical insight into simple water treatment and hygiene solutions in use. Anna-Lea https://events.ccc.de/congress/2025/hub/event/detail/wash-sprechstunde_aflz false 2025-12-29T18:30:00+01:00 18:30 01:00 FNF Assembly 39c3-fighting-the-eu-surveillance-law-apocalypse-contin en Workshop Open discussion round after the previous Talk in Hall Fuse https://fahrplan.events.ccc.de/congress/2025/fahrplan/event/the-last-of-us-fighting-the-eu-surveillance-law-apocalypse Chloé Berthélémy https://events.ccc.de/congress/2025/hub/event/detail/fighting-the-eu-surveillance-law-apocalypse-contin https://fnf-39c3-pretalx.my-server.in/fnf-at-39c3-2025/talk/SPTH7V/ https://fnf-39c3-pretalx.my-server.in/fnf-at-39c3-2025/talk/SPTH7V/feedback/ false 2025-12-29T12:30:00+01:00 12:30 00:45 Sendezentrum Podcast-Tisch 39c3-b7lab de Podcast-Tisch B7.Lab https://events.ccc.de/congress/2025/hub/event/detail/b7lab https://pretalx.c3voc.de/39c3-sendezentrum/talk/CPRELB/ https://pretalx.c3voc.de/39c3-sendezentrum/talk/CPRELB/feedback/ false 2025-12-29T13:30:00+01:00 13:30 00:45 Sendezentrum Podcast-Tisch 39c3-digital-humanities-auf-dem-39c3-sendezentrum de Podcast-Tisch Wir haben zwei Slots am Sendezentrum Podcast-Tisch gebucht um eure Stimmen zu den DH auf dem 39C3 unter professionellen Bedingungen aufzufangen und ON AIR zu bringen. Kommt vorbei und lasst euch überraschen. Ulrike diskutiert am liebsten über Datentracking in der Wissenschaft, aber auch andere Themen sind willkommen. Wer es nicht zum Tisch schafft, spricht Ulrike am besten dezentral an. Ulrike Wuttke Torsten Roeder https://events.ccc.de/congress/2025/hub/event/detail/digital-humanities-auf-dem-39c3-sendezentrum https://pretalx.c3voc.de/39c3-sendezentrum/talk/NSDRSL/ https://pretalx.c3voc.de/39c3-sendezentrum/talk/NSDRSL/feedback/ true 2025-12-29T14:45:00+01:00 14:45 00:45 Sendezentrum Podcast-Tisch 39c3-schiffsromantik de Podcast-Tisch Phako und Bert lesen Dinge vor (divers) Freut euch auf Dialekte, Intonationen deluxe, erkältete Stimmen, erotische Betonungen und i.d.R. vollkommen unvorbereitete, spontane Aufnahmen ohne besonderen Anlass <3 phakbert https://events.ccc.de/congress/2025/hub/event/detail/schiffsromantik https://pretalx.c3voc.de/39c3-sendezentrum/talk/QEGXLD/ https://pretalx.c3voc.de/39c3-sendezentrum/talk/QEGXLD/feedback/ false 2025-12-29T16:00:00+01:00 16:00 01:30 Sendezentrum Podcast-Tisch 39c3-binrgewitter-talk de Podcast-Tisch (lang) Auch in diesem Jahr ist die Binärgewitter Crew wieder auf dem Chaos Communication Congress vertreten! Beim 39C3 sprechen wir über aktuelle Tech-Trends, Open Source, wilde Debugging-Stories und natürlich jede Menge Nerdkram. Erwartet eine Mischung aus tiefem technischen Einblick, lockeren Diskussionen und dem gewohnt trockenen Binärgewitter-Humor. https://pretalx.c3voc.de/media/39c3-sendezentrum/submissions/SVFTLG/binaergewitter_logo_text_0N7dVQv.png Ingo Ebel https://events.ccc.de/congress/2025/hub/event/detail/binrgewitter-talk https://pretalx.c3voc.de/39c3-sendezentrum/talk/SVFTLG/ https://pretalx.c3voc.de/39c3-sendezentrum/talk/SVFTLG/feedback/ false 2025-12-29T18:45:00+01:00 18:45 00:45 Sendezentrum Podcast-Tisch 39c3-reden-ber-radfahren-deutschsprachige-fahrradpodcasts de Podcast-Tisch Aktuell sind mir 99 deutschsprachige Fahrradpodcasts bekannt - vermutlich seit 2009. Eine eigene kleine Nische, die ich euch vorstellen möchte. In Zusammenarbeit mit dem grandiosen Magazin fahrstil habe ich 2024 alle deutschsprachigen Fahrradpodcasts herausgesucht - es waren ca. 70. Mittlerweile sind es 99 und ich bin mir sicher, immer noch nicht Alle gelistet zu haben: https://podcasts.regines-radsalon.de Was hat es mit dieser Podcaster*innen-Community auf sich und was lässt sich mit so einer Sammlung anstellen? Erstaunlich ist, daß fast alle gefundenen Podcasts noch vollständig im Netz auffindbar sind. Es bleibt vermutlich work in progress in vielerlei Hinsicht. Manches geht und ist sogar unterhaltsam wie etwa die FahrradPodcastAdventsrallye, die im Dezember 2025 zum dritten Mal im Fediverse stattfinden wird. Anderes wird vermutlich nie richtig funktionieren wie etwa konsistente Daten aller deutschsprachigen Fahrradpodcasts zu etwa dem Genderverhältnis der Gästys zu bekommen. https://pretalx.c3voc.de/media/39c3-sendezentrum/submissions/E3ZEZS/Bildschirmfoto_2025-11-10_u_jbdywHD.png Regines Radsalon Diana https://events.ccc.de/congress/2025/hub/event/detail/reden-ber-radfahren-deutschsprachige-fahrradpodcasts https://pretalx.c3voc.de/39c3-sendezentrum/talk/E3ZEZS/ https://pretalx.c3voc.de/39c3-sendezentrum/talk/E3ZEZS/feedback/ false 2025-12-29T19:45:00+01:00 19:45 00:45 Sendezentrum Podcast-Tisch 39c3-akronymisierbar-061 de Podcast-Tisch Direkt im Anschluss an das erfolgreiche Panel bei den Datenspuren reden Kilian und Hendrik und Gäste auf dem Congress über ihre highlights und Projekte. https://pretalx.c3voc.de/media/39c3-sendezentrum/submissions/MT9RWD/cover_U4WJLBq.png Hendrik KI-lian https://events.ccc.de/congress/2025/hub/event/detail/akronymisierbar-061 https://pretalx.c3voc.de/39c3-sendezentrum/talk/MT9RWD/ https://pretalx.c3voc.de/39c3-sendezentrum/talk/MT9RWD/feedback/ false 2025-12-29T20:45:00+01:00 20:45 00:45 Sendezentrum Podcast-Tisch 39c3-gsfp-gesche-schaars-feiner-podcast de Podcast-Tisch Es ist noch nicht alles gesagt, Frau Schaar! https://events.ccc.de/congress/2025/hub/event/detail/gsfp-gesche-schaars-feiner-podcast https://pretalx.c3voc.de/39c3-sendezentrum/talk/87QJBA/ https://pretalx.c3voc.de/39c3-sendezentrum/talk/87QJBA/feedback/ false 2025-12-30T11:00:00+01:00 11:00 00:40 One 39c3-asahi-linux-porting-linux-to-apple-silicon en Hardware Talk In this talk, you will learn how Apple Silicon hardware differs from regular laptops or desktops. We'll cover how we reverse engineered the hardware without staring at disassembly but by using a thin hypervisor that traces all MMIO access and then wrote Linux drivers. We'll also talk about how upstreaming to the Linux kernel works and how we've significantly decreased our downstream patches in the past year. As an example, we will use support for the Type-C ports and go into details why these are so complex and required changes across multi subsystems. In the end, we'll briefly talk about M3/M4/M5 and what challenges we will have to overcome to get these supported. In this talk, you will learn how Apple Silicon hardware differs from regular laptops or desktops. We'll cover how we reverse engineered the hardware without staring at disassembly but by using a thin hypervisor that traces all MMIO access and then wrote Linux drivers. We'll also talk about how upstreaming to the Linux kernel works and how we've significantly decreased our downstream patches in the past year. As an example, we will use support for the Type-C ports and go into details why these are so complex and required changes across multi subsystems. In the end, we'll briefly talk about M3/M4/M5 and what challenges we will have to overcome to get these supported. sven https://events.ccc.de/congress/2025/hub/event/detail/asahi-linux-porting-linux-to-apple-silicon slides (reveal.js source) https://cfp.cccv.de/39c3/talk/YGHB9K/ slides (PDF) https://cfp.cccv.de/39c3/talk/YGHB9K/feedback/ false 2025-12-30T11:55:00+01:00 11:55 00:40 One 39c3-ccc-t-cosmic-ray-the-climate-catastrophe-and-trains en Science Talk How can we predict soil moisture by measuring cosmic ray products and what have trains to do with it? Ever wondered how this Dürremonitor works, that you heared about in ther german news? These question and some more I will try to answer while I give an overview of some of the research that is done by the Helmholtz Centre for Environmental Research (UFZ). The Dürremonitor is a programme that is often mentioned in the German news when some regions experience drought. Alongside the Dürremonitor and the underlying Mesoscale Hydrological Model (MHM), there is ongoing research at the UFZ concerning soil moisture. Some of these studies involve measuring soil moisture using a technique called cosmic ray neutron sensing (CRNS). Rather than taking measurements, the MHM uses a physics-based model incorporating precipitation forecasts to predict drought or flood. These two strategies for quantifying soil moisture are therefore in opposition: the measurement-based approach (CRNS) and the modelling-based approach (MHM/Dürremonitor). CRNS is a relatively new method of measuring soil moisture based on the proportion of neutrons reflected by the soil (the principles were discovered in the 1980s, but it has only recently become commercially applicable). This method has several advantages over previous soil moisture measurement methods: it is non-invasive, easy to set up, portable and can therefore be used on trains. In the talk I will give an overview of the Dürremonitor and MHM and then focus on CRNS. I will explain the physical principles behind the method, how it is implemented in practice by making serveys using trains. https://cfp.cccv.de/media/39c3/submissions/PM8ZHP/cosmic_ray_pathway_3_wfn0BiF_q7fyvk6.webp FantasticMisterFux https://events.ccc.de/congress/2025/hub/event/detail/ccc-t-cosmic-ray-the-climate-catastrophe-and-trains https://cfp.cccv.de/39c3/talk/PM8ZHP/ slides https://cfp.cccv.de/39c3/talk/PM8ZHP/feedback/ false 2025-12-30T12:50:00+01:00 12:50 00:40 One 39c3-security-of-cardiac-implantable-electronic-devices en Security Talk Cardiac Implantable Electronic Devices (CIED), such as cardiac pacemakers and defibrillators, are a fairly niche target for security researchers, in part due to a lack of manufacturer cooperation and device accessibility. This talk aims to provide insights into the challenges in device development and methods with which to research device security. Data accessibility to patients will be touched upon. CIEDs may adversely affect patients implanted with such devices should their security be compromised. Although some efforts to secure these devices can be noted, it has quite often been lacking and may thus enable patient harm or data confidentiality compromise by malicious actors. Given the vast consequences of security vulnerabilities within this industry, the author aims to provide insight into the challenges associated with designing security architectures for such platforms, as well as possible methodology of researching these devices safely even when lacking manufacturer cooperation and access to device programmers. Data collected by CIEDs and transmitted through remote monitoring is an additional concern for patients. Whilst research has shown that most manufacturers do respond in a timely and comprehensive fashion to GDPR requests, immediate data access is not yet possible and requires the patient to reach out to their doctors to obtain the requisite (event) data. A proposed solution is presented on how a patient communicator may be designed to allow patients interested in their autonomy to perform limited device interrogation in a safe and secure manner. dilucide https://events.ccc.de/congress/2025/hub/event/detail/security-of-cardiac-implantable-electronic-devices https://cfp.cccv.de/39c3/talk/9P8YNR/ https://cfp.cccv.de/39c3/talk/9P8YNR/feedback/ true 2025-12-30T13:50:00+01:00 13:50 00:40 One 39c3-breaking-bots-cheating-at-blue-team-ctfs-with-ai-speed-runs en Security Talk After we announced our results, CTFs like Splunk's Boss of the SOC (BOTS) started prohibiting AI agents. For science & profit, we keep doing it anyways. In BOTS, the AIs solve most of it in under 10 minutes instead of taking the full day. Our recipe was surprisingly simple: Teach AI agents to self-plan their investigation steps, adapt their plans to new information, work with the SIEM DB, and reason about log dumps. No exotic models, no massive lab budgets - just publicly available LLMs mixed with a bit of science and perseverance. We'll walk through how that works, including videos of the many ways AI trips itself up that marketers would rather hide, and how to do it at home with free and open-source tools. CTF organizers can't detect this - the arms race is probably over before it really began. But the real question isn't "can we cheat at CTFs?" It's what happens when investigations evolve from analysts-who-investigate to analysts-who-manage-AI-investigators. We'll show you what that transition already looks like today and peek into some uncomfortable questions about what comes next. THE PLAN Live demonstrations of AI agents speed-running blue team challenges, including the failure modes that break investigations. We'll show both what happens when we try the trivial approaches like “just have claude do it”, “AI workflows”, and what ultimately worked, like managed self-planning, semantic SIEM layers, and log agents. Most can be done with free and open tools and techniques on the cheap, so we will walk through that as well. THE DEEP DIVE * Why normal prompts and static AI workflows fail * Self-planning investigation agents that evolve task lists dynamically * What we mean by semantic layers for calling databases and APIs * How to handle millions of log events without bankrupting yourself * Why "no AI" rules are misguided technically and conceptually GOING BEYOND CTFS The same patterns that trivialize training exercises work on real SOC investigations. We're watching blue team work fundamentally transform - from humans investigating to humans managing AI investigators. Training programs teaching skills AI already automates. Hiring practices that can't verify who's doing the work. Certifications losing meaning. More fundamentally, when we talk about who watches the watchers, a lot is about to shift again. Leo Meyerovich Sindre Breda https://events.ccc.de/congress/2025/hub/event/detail/breaking-bots-cheating-at-blue-team-ctfs-with-ai-speed-runs https://cfp.cccv.de/39c3/talk/P8AHVT/ https://cfp.cccv.de/39c3/talk/P8AHVT/feedback/ false 2025-12-30T14:45:00+01:00 14:45 01:00 One 39c3-security-nightmares de CCC & Community Talk Was hat sich im Jahr 2025 im Bereich IT-Sicherheit getan? Welche neuen Methoden, Buzzwords und Trends waren zu sehen? Was waren die fiesesten Angriffe und die teuersten Fehler? Wir wagen auch den IT-Security-Ausblick auf das Jahr 2026. Der ist wie immer mit Vorsicht zu genießen. https://cfp.cccv.de/media/39c3/submissions/YE7ZA9/cain_5IxOa2K.jpg Constanze Kurz Ron https://events.ccc.de/congress/2025/hub/event/detail/security-nightmares https://cfp.cccv.de/39c3/talk/YE7ZA9/ https://cfp.cccv.de/39c3/talk/YE7ZA9/feedback/ false 2025-12-30T16:00:00+01:00 16:00 01:00 One 39c3-closing-ceremony de CCC & Community Ceremony Power off! Nach vier wunderbaren Tagen kommt der Congress nun langsam zum Ende. Lasst uns zurückblicken, die Eindrücke sortieren und diese inspirierte Stimmung nach draußen tragen.   Stella pajowu https://events.ccc.de/congress/2025/hub/event/detail/closing-ceremony https://cfp.cccv.de/39c3/talk/POWER0/ https://cfp.cccv.de/39c3/talk/POWER0/feedback/ false 2025-12-30T11:00:00+01:00 11:00 00:40 Ground 39c3-atoms-in-space en Science Talk *What are atoms doing in space anyways?* This talk will provide a brief overview of applications of quantum technologies in space ranging from precise timing and inertial measurements to fundamental physics. Quantum technologies have seen a wide field of applications in medicine, geosciences, computing and communications, in many cases bridging the gap from laboratory experiments to commercial products in the last decade. For terrestrial applications that is. But what about going to space? Quantum physics based sensors and experiments promise higher accuracy, sensitivity or better long term stability as they rely on immutable properties of atoms. When properly manipulated, these (ultra-)cold atoms are likely to outperform state of the art instruments. Experiments conducted on sounding rockets demonstrated important steps like Bose-Einstein Condensate creation during a few minutes in microgravity, enabling more advanced quantum experiments in the future. The International Space Station and the Tiangong Space Station host dedicated experiments like ultrastable clocks as well as flexible research infrastructure for fundamental research benefitting from long free-fall times. However, the deployment of such technologies on satellites is not as advanced. Satellite missions utilizing quantum sensors or performing long term experiments are subject to studies and proposals backed by a broad scientific community aiming at better understanding of climate change, interplanetary navigation or tests of general relativity. First steps towards realization of such missions are taken by ESA, NASA and various national space agencies as well as universities funded by national agencies or the EU. This talk will detect the current state of atoms in space and give an overview of active programs to deploy quantum sensors on operational satellite missions. The focus is on future applications in geosciences and related fields employing the same technology. - [Presentation](https://cfp.cccv.de/media/39c3/submissions/TXYU83/resources/39C3_Atoms_in_Space_CHOIpRv.pdf) - [Extended list of references](https://cfp.cccv.de/media/39c3/submissions/TXYU83/resources/References_v11_AryJX8G.pdf) https://cfp.cccv.de/media/39c3/submissions/TXYU83/atoms_in_space_kef3bHt_vy26VzX_gNDdgFl__QVoKLri.webp manuel https://events.ccc.de/congress/2025/hub/event/detail/atoms-in-space https://cfp.cccv.de/39c3/talk/TXYU83/ List of References Presentation https://cfp.cccv.de/39c3/talk/TXYU83/feedback/ false 2025-12-30T11:55:00+01:00 11:55 00:40 Ground 39c3-cuii-wie-konzerne-heimlich-webseiten-in-deutschland-sperren de Ethics, Society & Politics Talk Stellt euch vor, eine private Organisation aus milliardenschweren Konzernen entscheidet, welche Webseiten ihr nicht besuchen dürft - ohne Richter, ohne öffentliche Kontrolle oder Transparenz. Genau das macht die CUII in Deutschland seit Jahren. In Deutschland entscheidet eine private Organisation aus Internetanbietern und großen Unterhaltungskonzernen, welche Webseiten für den Großteil der Bevölkerung nicht mehr erreichbar sind. Die selbsternannte "Clearingstelle Urheberrecht im Internet" sperrt ohne richterliche Beschlüsse den Zugriff auf Hunderte von Domains. Wir haben daraufhin cuiiliste.de ins Leben gerufen, um die geheim gehaltene Liste von Domains zu veröffentlichen und so mehr Transparenz in die heimliche Zensur der Konzerne zu bringen. Unsere Auswertung der Liste zeigte: Fast ein Drittel der gesperrten Domains erfüllte – teils seit Jahren – nicht mehr die Kriterien für eine Sperre. Wir werden uns ansehen, wie dutzende Domains nach öffentlichem Druck wieder entsperrt wurden, während Provider gleichzeitig deren Sperren noch mehr verschleierten. Vor ein paar Monaten soll sich angeblich viel geändert haben bei der CUII - doch diese Änderung sieht leider verdächtig nach einem PR-Stunt aus, um weiterhin Seiten ohne Transparenz sperren zu können. Lina Lastname Northernside https://events.ccc.de/congress/2025/hub/event/detail/cuii-wie-konzerne-heimlich-webseiten-in-deutschland-sperren https://cfp.cccv.de/39c3/talk/9AEJAR/ slides https://cfp.cccv.de/39c3/talk/9AEJAR/feedback/ false 2025-12-30T12:50:00+01:00 12:50 00:40 Ground 39c3-who-runs-the-www-wsis20-and-the-future-of-internet en Ethics, Society & Politics Talk Abbreviations such as WSIS+20, IGF, IETF, DIEM, ICANN, PDP, ITU or W3C regularly appear in discussions about the Internet, yet often remain vague. This talk provides an update on the current state of Internet governance and explains why decisions made in United Nations processes have direct implications for technical standards, digital infrastructure, and power asymmetries. The starting point is the UN’s WSIS+20 review process, which negotiated the future of the Internet Governance Forum and the roles of stakeholders within it. Against this backdrop, the talk traces the origins of the so-called multistakeholder approach and examines how it works in practice and where its limits lie. What role do technical standardization organizations such as the IETF, ICANN, ITU or the W3C play in an increasingly geopolitical environment? Who sets the rules, who defines the standards, and who is left out of these processes? The aim of the talk is to make the connections between technology and international politics visible and to explain why Internet governance matters to everyone interested in an open, global, and interoperable Internet. Sophia Longwe https://events.ccc.de/congress/2025/hub/event/detail/who-runs-the-www-wsis20-and-the-future-of-internet https://cfp.cccv.de/39c3/talk/DBWBG8/ https://cfp.cccv.de/39c3/talk/DBWBG8/feedback/ false 2025-12-30T13:50:00+01:00 13:50 00:40 Ground 39c3-von-groschen-und-spurlos-gnu-taler-auch-auf-eurem-event de CCC & Community Talk Willkommen in der Zukunft: Beim LUG Camp in Wipperfürth und bei den Datenspuren in Dresden wurde digital bezahlt - mit GNU Taler als Event-Bezahlsystem. Noch einfacher als Bargeld, billiger als Kartenzahlung und ohne Eingriff in die Privatsphäre der Besucher*innen. Wir zeigen euch, wie auch ihr das bei eurer nächsten (Chaos-)Veranstaltung anbieten könnt! Anonymes Bezahlen ganz ohne Bargeld? Digitales Bezahlen ohne Gebühren auf jede einzelne Transaktion? Keine zentrale Datensammelei bei US-amerikanischen Zahlungsanbietern, und trotzdem keine Blockchain? Geht nicht? Geht doch! Schon auf mehreren Veranstaltungen wurde [GNU Taler](https://www.taler.net/) erfolgreich als lokales Event-Bezahlsystem eingesetzt: Sämtliche Zahlungen beim [LUG Camp 2024](https://lugcamp.wuplug.org/) wurden dank GNU Taler ausschließlich digital durchgeführt. Ebenso wurde mehr als ein Viertel des Umsatzes bei den [Datenspuren 2025](https://datenspuren.de/2025/) mit GNU Taler digital abgewickelt. Während die GLS Bank im Rahmen des EU-geförderten Projekts NGI Taler ein [deutschlandweites Angebot](https://www.gls.de/taler) vorbereitet, hatten unsere Besucher*innen bereits jetzt die Gelegenheit, anonymes digitales Bezahlen in der echten Welt zu testen. Das positive Feedback und der reibungslose Ablauf haben uns gezeigt: GNU Taler ist einsatzbereit und kommt in der Community super an! Deshalb wollen wir unsere Erfahrungen mit GNU Taler als Eventbezahlsystem gerne an Orgateams von anderen (Chaos-)Veranstaltungen weitergeben. Nach einer Einführung zur Funktionsweise von GNU Taler berichten wir von der praktischen Umsetzung beim LUGCamp und bei den Datenspuren und geben Tipps für alle, die GNU Taler auch bei ihrem nächsten Event anbieten wollen. Mikolai Gütschow signum https://events.ccc.de/congress/2025/hub/event/detail/von-groschen-und-spurlos-gnu-taler-auch-auf-eurem-event https://cfp.cccv.de/39c3/talk/38XZPY/ Folien https://cfp.cccv.de/39c3/talk/38XZPY/feedback/ false 2025-12-30T11:00:00+01:00 11:00 00:40 Zero 39c3-i-hated-all-the-cross-stitch-software-so-i-made-my-own-my-deranged-outsider-software-suite-for-making-deranged-outsider-art en Art & Beauty Talk I wanted to design beautiful header diagrams and ASCII tables suitable for stitching on throw pillows, but found existing tools for cross-stitch design to be all wrong. I made my own set of command-line tools for building this chunky, pixelated visual art. If you've never seen a cross-stitch sampler that had bitrot, this talk will fix it. Designing cross-stitch patterns, I got frustrated with all the programs which expected me to click around a canvas setting individual pixels. I wanted a cross-stitch design software suite that I could drive with a Makefile, which could give me an interactive interface for stitching or compile them to PDF. In short, I wanted to say `echo "shutdown -h now" | embellish --border | export pattern --pdf` and get a design worthy of stitching on a pillow. So, I made the thing I wanted. I'll discuss the many yak shaves along the way (proprietary file format reverse-engineering, OAuth2, what 'color' even means, unikernel hosting, and more). I'll talk a bit about the joy of making something so you can make something, and how it feels to craft software that is unapologetically personal. https://cfp.cccv.de/media/39c3/submissions/FNCLLE/tcp_header_in_progress_closeup_N9zKLZV__TlHaLYq.webp yomimono https://events.ccc.de/congress/2025/hub/event/detail/i-hated-all-the-cross-stitch-software-so-i-made-my-own-my-deranged-outsider-software-suite-for-making-deranged-outsider-art https://cfp.cccv.de/39c3/talk/FNCLLE/ final-ish version of slides cross-stitch pattern for '39c3' from the slides https://cfp.cccv.de/39c3/talk/FNCLLE/feedback/ false 2025-12-30T11:55:00+01:00 11:55 00:40 Zero 39c3-end-of-10-how-the-foss-community-is-combatting-software-drive-resource-and-energy-consumption en CCC & Community Talk The end of free support for Windows 10 was 14 October 2025. Well, sort of. Microsoft moved the date to 2026, one more year the FOSS community can introduce users to sustainable software. 14 October is also KDE's birthday, International E-Waste Day, with International Repair Day following on 18 October. The irony is deep, but what is not ironic is that millions of functioning computers will end up becoming security risks or discarded as e-waste. This means manufacturing and transporting new ones, the biggest waste of all: hardware production accounts for over 75% of a device's CO2 emissions over its lifespan. The FOSS community had an opportunity and we took it! In 2024, KDE Eco's Opt Green project began a global, unified campaign across FOSS and repair communities to upgrade unsupported Windows 10 computers to Linux. We held BoFs at SFSCon, CCC, and FOSDEM. We thought big and acted boldly. In this talk End Of 10 contributors will discuss the campaign, what has worked and what the challenges have been, and how FOSS provides a solution to software-driven resource and energy consumption. This is a talk about digital sustainability and the role software plays in hardware longevity. At the 38C3, the End Of 10 campaign held a workshop to co-ordinate contributions across FOSS communities. Many people currently involved started contributing after this workshop, including 2 of the 3 presenters. https://cfp.cccv.de/media/39c3/submissions/N7CZSV/endof10-logo-avatar_US7be6Y_WFB2s4c_yE8_ETVEaxt.webp Joseph P. De Veaugh-Geiss Carolina Silva Rode Bettina Louis https://events.ccc.de/congress/2025/hub/event/detail/end-of-10-how-the-foss-community-is-combatting-software-drive-resource-and-energy-consumption Slides "End Of 10: How the FOSS Community is Combatting Software-Driven Resource & Energy Consumption" https://cfp.cccv.de/39c3/talk/N7CZSV/ https://cfp.cccv.de/39c3/talk/N7CZSV/feedback/ false 2025-12-30T12:50:00+01:00 12:50 00:40 Zero 39c3-fossile-industrie-liebt-ki de Ethics, Society & Politics Talk Der Hype um generative KI und die Gasindustrie bilden in Zeiten der Klimakrise eine bedrohliche Allianz für die Zukunft des Planeten. Obwohl die negativen Klimaauswirkungen generativer KI immer deutlicher werden, sollen in ganz Europa Großrechenzentren gebaut werden und Deutschland „KI-Nation“ werden, was ungeahnte „Wirtschaftskräfte freisetzen soll“ – zumindest, wenn es nach der Bundesregierung geht. Der Ausbau der Recheninfrastruktur für generative KI benötigt viel Energie, Wasser und Ressourcen, was global zu Umweltschäden führt. Prognosen für die EU zeigen, dass der Energieverbrauch in Zukunft so groß werden könnte, dass der Ausbau der erneuerbaren Energien nicht mithalten kann – doch die fossile Industrie steht bereits in den Startlöchern. Der Hype um generative KI liefert ihnen die perfekte Begründung für den Ausbau fossiler Infrastruktur- mitten in der eskalierenden Klimakrise. Tech- und Fossilkonzerne investieren massiv in neue Gaskraftwerke für energiehungrige Rechenzentren. Dabei ist der wirtschaftliche Nutzen und die Wertschöpfung durch die Technologie weiterhin unklar. Klar ist: wir erleben derzeit eine fossile Gegenoffensive im Gewand digitaler Versprechen. Auf Kosten des Klimas und der Zukunft. Dieser Vortrag schließt an den Talk "Klimaschädlich by Design" vom 38C3 an und gibt Updates zu Entwicklungen in Deutschland und Europa. https://cfp.cccv.de/media/39c3/submissions/3TA9HW/a-rising-tide-lifts-all-bots_rose-willi_rPbTywJ.webp Rike Moritz Leiner https://events.ccc.de/congress/2025/hub/event/detail/fossile-industrie-liebt-ki https://cfp.cccv.de/39c3/talk/3TA9HW/ Folien https://cfp.cccv.de/39c3/talk/3TA9HW/feedback/ false 2025-12-30T13:50:00+01:00 13:50 00:40 Zero 39c3-we-the-eu-and-1064-danes-decided-to-look-into-youtube-a-story-about-how-the-eu-gave-us-a-law-1064-danes-gave-us-their-youtube-histories-and-reality-ga en Science Talk We explore what happens when Europe’s ambitious data access laws meet the messy realities of studying major digital platforms. Using YouTube as a central case, we show how the European Union’s efforts to promote transparency through the GDPR, the Digital Services Act (DSA), and the Digital Markets Act (DMA) are reshaping the possibilities and limits of independent platform research. At the heart of the discussion is a paradox: while these laws promise unprecedented access to the data that shape our digital lives, the information researchers and citizens actually receive is often incomplete, inconsistent, and difficult to interpret. In this talk, we take a close look at data donations from over a thousand Danish YouTube users, which at first glance did not reveal neat insights but sprawling file structures filled with cryptic data points. Still, if the work is put in, these digital traces offer glimpses of engagement and attention, and help us understand what users truly encountered or how the platform influenced their experiences. The talk situates this challenge within a broader European context, showing how data access mechanisms are set up in ways that strengthen existing power imbalances. Application processes for research data vary widely, requests are rejected or delayed without clear justification, and the datasets that do arrive frequently lack the granularity required for meaningful analysis. Yet the picture is not purely bleak. Citizens, researchers, and civil society already have multiple legal levers to demand greater transparency and accountability. The fundamental question is no longer whether democratic oversight is possible, but how we can use the tools at hand to make it real. **Talk Description** In this talk, we explore what happens when the European Union’s data access laws meet the practical realities of platform research. The talk opens with a shared introduction, where David and LK set the stage: why social media platforms like YouTube matter for democracy and what the EU has done to make them more transparent. LK will then provide a short introduction into the legally mandated ways we can currently use to access platform data: from the GDPR’s right of access, the research data access provisions in the DSA, to the portability obligations into the DMA. But access is not the same as insight, a lesson David learned the hard way. Along with his team he invited over a thousand Danes to make use of their GDPR-right to their own data and donate their YouTube watch histories, searches, subscriptions and comments. Using the DSA, the team then obtained meta-data on the millions of videos the data donors had interacted with. The goal: Seeing what the digital data traces YouTube collects from its users can tell us about the platform’s effect on people’s lives and society. Are the data carrying indicators of polarization, loneliness, political extremism or any of the numerous other ails of society that YouTube has been suspected to cause? However, the data are difficult to get a hold of, messy, not properly annotated, and parsing them requires an almost archeological mindset. Together, we will peek behind the Youtube curtain, shine a light on what platform data actually looks like, and sketch out what can and cannot be learned from them. All around Europe, researchers are currently facing similar challenges, parsing cryptic user and platform data from Facebook and TikTok to porn sites and Zalando. The platforms implement the data access laws to achieve minimal compliance but not to provide meaningful transparency. Data gathered by the DSA40 Data Access Collaboratory shows that application forms vary widely, researchers are rejected for non-compliant reasons, and applications artificially stalled. Other researchers have shown that the data received through some of the APIs is incomplete and inaccurate. In short: there is a lot of space for improvement. But we do not need to wait for investigations into platform compliance to conclude.. The basic conditions for democratic oversight have been set, which means that theoretically various legal ways into the platforms exist for citizens, researchers and civil society. The question that remains is which levers to use to practically realise as much of this potential as possible. **About the Presenters** David Wegmann is a PhD student at Aarhus University, Denmark. He researches social media and its societal effects using data science. As part of DATALAB, he led the analysis of donated data for “Data donation as a method for investigating trends and challenges in digital media landscapes at national scale: The Danish population’s use of YouTube as an illustrative case” by Bechmann and colleagues (2025). LK Seiling coordinates the DSA40 Data Access Collaboratory, where they research the implementation of the DSA’s data access provisions. At the Weizenbaum Institute Berlin, they are also looking into research engineering and data access as well as technologically mediated risks for individuals, society, and science. https://cfp.cccv.de/media/39c3/submissions/XJ8G3Z/Presentation1_oRJ8H9B_5m75Epo_K2xuHvV.webp David LK Seiling https://events.ccc.de/congress/2025/hub/event/detail/we-the-eu-and-1064-danes-decided-to-look-into-youtube-a-story-about-how-the-eu-gave-us-a-law-1064-danes-gave-us-their-youtube-histories-and-reality-ga https://cfp.cccv.de/39c3/talk/XJ8G3Z/ Slides for the talk https://cfp.cccv.de/39c3/talk/XJ8G3Z/feedback/ false 2025-12-30T14:45:00+01:00 14:45 01:00 Zero 39c3-infrastructure-review en CCC & Community Talk Infrastructure teams present what they did for this years congress and why they did it that way. 39c3 is a big challenge to run, install power, network connectivity and other services in a short time and tear down everything even faster. This is a behind the scenes of the event infrastructure, what worked well and what might not have worked as expected. nicoduck https://events.ccc.de/congress/2025/hub/event/detail/infrastructure-review https://cfp.cccv.de/39c3/talk/8NECSP/ https://cfp.cccv.de/39c3/talk/8NECSP/feedback/ false 2025-12-30T11:00:00+01:00 11:00 00:40 Fuse 39c3-how-to-keep-open-source-open-without-leaving-our-communities-open-to-threats en Ethics, Society & Politics Talk The Four Freedoms (defined ~40 years ago) and the Four Opens (~15 years ago) for Open Source provided canonical definitions for what are the cornerstones of Open Source Software communities today. While the ethos still applies today, the cultural norms that blossomed to put it into practice are from an era with different challenges. To build a better world, we need to both keep and protect the value system of the Four Freedoms and Four Opens. To do that, we need to re-assess our risk and threat models to balance that allows beautiful minds to flourish as well as introduce responsible friction to prevent harm from coming to them. The state of the internet, c 1990: * Limited, opt-in connectivity: people had to both have access to a computer and that computer had to have access to the internet. * Tooling required some in-industry knowledge to be able to run and use, not only for development but also for communication. * Open source was a young movement. The "common source" was proprietary. The state of the internet, c 2025: * Always online, might-not-even-be-to-opt-out connectivity: devices are almost always collecting and transmitting data, including audio/visual, in some cases even if "turned off". * Easy to use tooling has made it easier for everyone to come together. The pervasiveness of technology also means that most people, of any background, can easily access other people in the thousands or even millions. * Open source is common, accessible, and matured. A $9 **_trillion_** resource. Yes, **_trillion_**. These three significant changes drastically change the threat model for OSS communities. In the beginning, someone had to have both knowledge and resources to harm or otherwise compromise a community of developers. Now, anyone with a grudge can make a bot army with seamless integrations and gracious freemium tiers for AI/LLMs. Likewise, when open source was small, the "who" who would be motivated to harm and otherwise disrupt those communities was limited. Now there is both massive social and economic benefit to harm and disrupt. This means that risks and threats now still include the motivated and resourced **_with the addition of_** those who are scarce in both. We need to come together to build new organizational threat models that account for how this consequence has posed new risks to our communities. With care and attention to detail, we can introduce responsible friction that will protect our communication infrastructure, the lifeblood of what allows open source to grow. There will also be a workshop with this presentation, with the outcome of creating an ongoing working group dedicated to helping OSS Foundations of all sizes protect their communities. There will be a workshop about the same topic on 12.30, Day 4: [https://events.ccc.de/congress/2025/hub/de/event/detail/how-to-keep-open-source-open-without-leaving-our-c](https://events.ccc.de/congress/2025/hub/de/event/detail/how-to-keep-open-source-open-without-leaving-our-c) Quintessence https://events.ccc.de/congress/2025/hub/event/detail/how-to-keep-open-source-open-without-leaving-our-communities-open-to-threats https://cfp.cccv.de/39c3/talk/YDKJDT/ https://cfp.cccv.de/39c3/talk/YDKJDT/feedback/ false 2025-12-30T11:55:00+01:00 11:55 00:40 Fuse 39c3-what-you-hack-is-what-you-mean-35-years-of-wiring-sense-into-text en Art & Beauty Talk Encoding isn’t just for machines — it’s how humans shape meaning. This talk traces 35 years of hacking text through the Text Encoding Initiative (TEI), a community-driven, open-source standard for describing the deep structure of texts. We’ll explore how TEI turns literature, research, and even hacker lore into machine-readable, remixable data — and how it enables minimal, sustainable self-publishing without gatekeepers. From alphabets to XML and the Hacker Bible, we’ll look at text as a living system: something we can read, write, and hack together. Computers can’t do much without encoding. They need ways to turn bytes into symbols, words, and meaning — to make text readable for both humans and machines. But encoding isn’t just for machines. Humans also encode: we describe, structure, and translate our thoughts into text. And while the number of text formats seems endless (and keeps growing), that’s not a bug — it’s a feature. Diversity in encoding is how we learn what works and what doesn’t. Long before ASCII tables or Unicode, text encoding already existed — in alphabets, printing presses, and typographic systems. Every technology of writing has been a way of hacking language into matter: from clay tablets to lead letters, from code pages to Markdown. Each era brings new formats and new constraints — and with them, new genres, new rules, new cultural codes. Think of poetry and protocol manuals, fairy tales and README files, the Hacker Bible itself — all shaped by the tools and conventions that carry them. So here’s the question: can we encode not only what we see, but what we mean? Can we capture a poem’s rhythm, a play’s voices, or the alternate endings of a story — and do it in a way that’s open, remixable, and machine-readable? Turns out, yes — and the solution has existed since 1988. It’s called the Text Encoding Initiative (TEI), a long-running open-source standard that lets you describe the structure, semantics, and context of texts using XML. You can think of it as a humanities fork of hypertext — an extensible markup language for everything from medieval manuscripts to memes. TEI is more than a format: it’s a collaborative, living standard maintained by an international community of researchers, librarians, and digital humanists. It evolves with the world — adding elements for new text types (like social media posts) and for changing cultural realities (like non-binary gender markers). It embodies open science principles and keeps publishing in the hands of its creators. You don’t need a publisher, a platform, or a big server farm. Just an XML-aware text editor, a few lines of CSS, and maybe a Git repo. From there, you can transform your encoded text into websites, PDFs, e-books — or share it directly in its raw, readable, hackable form. It’s sustainable, transparent, and low-energy. It even challenges the academic prestige economy by making every individual contribution visible — from editors to annotators to script writers. In this talk, we’ll look at text as code and code as culture, from alphabets to XML, and explore how TEI can be a tool for hacking not machines but meaning itself. We’ll end with a practical example: a TEI-encoded page of the first Hacker Bible — because our own history also deserves to be archived, shared, and forked. https://cfp.cccv.de/media/39c3/submissions/8CVJUN/hackerbible-p40_WmYht9p_VabQ7jP.webp Torsten Roeder https://events.ccc.de/congress/2025/hub/event/detail/what-you-hack-is-what-you-mean-35-years-of-wiring-sense-into-text https://cfp.cccv.de/39c3/talk/8CVJUN/ https://cfp.cccv.de/39c3/talk/8CVJUN/feedback/ false 2025-12-30T12:50:00+01:00 12:50 00:40 Fuse 39c3-laser-beams-light-streams-letting-hackers-go-pew-pew-building-affordable-light-based-hardware-security-tooling en Hardware Talk Stored memory in hardware has had a long history of being influenced by light, by design. For instance, as memory is represented by the series of transistors, and their physical state represents 1's and 0's, original EPROM memory could be erased via the utilization of UV light, in preparation for flashing new memory. Naturally, whilst useful, this has proven to be an avenue of opportunity to be leveraged by attackers, allowing them to selectively influence memory via a host of optical/light-based techniques. As chips became more advanced, the usage of opaque resin was used as a "temporary" measure to combat this flaw, by coating chips in a material that would reflect UV. Present day opinions are that laser (or light) based hardware attacks, are something that only nation state actors are capable of doing Currently, sophisticated hardware labs use expensive, high frequency IR beams to penetrate the resin. This project demonstrates that with a limited budget and hacker-and-maker mentality and by leveraging more inexpensive technology alternatives, we implement a tool that does laser fault injection, can detect hardware malware, detect supply chain chip replacements, and delve into the realm of laser logic state imaging. Stored memory in hardware has had a long history of being influenced by light, by design. For instance, as memory is represented by the series of transistors, and their physical state represents 1's and 0's, original EPROM memory could be erased via the utilization of UV light, in preparation for flashing new memory. Naturally, whilst useful, this also has proven to be an avenue of opportunity to be leveraged by attackers, allowing them to selectively influence memory via a host of optical/light-based techniques. As chips became more advanced, the usage of opaque resin was used as a "temporary" measure to combat this flaw, by coating chips in a material that would reflect undesirable UV. Present day opinions are that laser (or light) based hardware attacks, are something that only nation state actors are capable of doing; due to both limitations of cost in tooling as well as personnel expertise required. Currently, sophisticated hardware labs use expensive, high frequency IR beams to penetrate the resin. This project demonstrates that with a limited budget and hacker-and-maker mentality, similar results can be obtained at a fraction of the cost, from the comfort of your home or garage. With the modifications of an opensource low-cost microscope, addition of a home-built beam splitter and interchangeable diode laser, it has been shown that consumer-grade diodes are capable of producing results similar to the high-cost variants, such as the YAG lasers. One example of results includes introducing affordable avenues to conduct laser-based fault injection, via the usage of such budget-friendly tooling. We are opening the study of these low-level hardware attacking methodologies to more entry-level security testers, without the need for hundreds of thousands of dollars in startup capital. By leveraging more affordable technology alternatives, we have embarked on a mission to uncover hardware malware, detect supply-chain chip replacements, and delve into the realm of laser-logic-state imaging. Our approach integrates optics, laser selection, and machine learning components. https://cfp.cccv.de/media/39c3/submissions/TRGCPS/chip_LyQpGYr.png Patch Sam. Beaumont (PANTH13R) https://events.ccc.de/congress/2025/hub/event/detail/laser-beams-light-streams-letting-hackers-go-pew-pew-building-affordable-light-based-hardware-security-tooling https://cfp.cccv.de/39c3/talk/TRGCPS/ https://cfp.cccv.de/39c3/talk/TRGCPS/feedback/ false 2025-12-30T13:50:00+01:00 13:50 00:40 Fuse 39c3-battling-obsolescence-keeping-an-80s-laser-tag-sys en Hardware Talk Keeping old projects working can be an uphill battle. This talk explores how the laser tag system Q-Zar (Quasar in the UK) has been kept alive since the company behind it failed in the 90s. The challenges encountered, the lessons learnt, and how those can be applied to our own future projects to maximise the project lifetime. Looking at the effects of obsolescence in the context of a laser tag system from the 1980s Q-Zar (Quasar in the UK), what needed to happen to keep it going to enable people to continue playing. What lessons we can learn from that and some good examples from other projects, and how that can be applied to our own projects. This talk covers the electronics involved in the laser tag system, why the continued availability of components has varied a lot. The need to develop new computer software that continues to work years later. The way the physical equipment can have its life extended. Topics covered range from electronics design through to software coding and onto physical unit repair. A look at the tooling created to help maintain, support and repair the laser tag packs. The challenges Covid-19 created and how things were rapidly pivoted to enable continued playing in challenging times. This is about how we all can make simple decisions that help build something that will last the maximum time possible with the least amount of effort. https://cfp.cccv.de/media/39c3/submissions/DRLEUN/348s_uJgdfJx_KUYKv3k_e17vy1a_ppjC6q8_m5FC9vA.webp Trikkitt https://events.ccc.de/congress/2025/hub/event/detail/battling-obsolescence-keeping-an-80s-laser-tag-sys https://cfp.cccv.de/39c3/talk/DRLEUN/ Slides Slides - PDF https://cfp.cccv.de/39c3/talk/DRLEUN/feedback/ false 2025-12-30T18:00:00+01:00 18:00 01:00 Chaos Computer Music Club 39c3-modular-synthesizer-anfangerworkshop-mit-software en Music Workshop Ein Anfängerfreundlicher Modular-Synthesizer Workshop. In der Software VCV-Rack lernen wir die Basics der (modular)-Synthesizer kennen und am Ende des Workshops sind Ausdrücke wie LFO, CV, Gate, Low-Pass-Filter keine unbekannten meh: die Grundlage für komplexere Patches ist gesetzt. Bitte bringt Kopfhörer mit, sowie einen Rechner auf dem VCV-Rack bereits installiert ist. Die Software findet ihr bei vcvrack.com oder gegebenenfalls in eurem Paketmanager. wdlbrmft https://events.ccc.de/congress/2025/hub/event/detail/modular-synthesizer-anfangerworkshop-mit-software https://cfp.cccv.de/39c3-chaos-computer-music-club/talk/PS3MBU/ true 2025-12-30T19:00:00+01:00 19:00 02:00 Chaos Computer Music Club 39c3-flux-variations en DJ-Set DJ Set An invitation to discover classical music patterns and new music by listening carefully and letting go. A calm, open-ended programme for curious listening. A shared space where unfamiliar ideas can settle and reveal themselves over time, created by the unfolding of pieces by composers of different eras, schools and genres. Nothing is required beyond a willingness to listen and stay awhile. Well suited to joining the lounge, taking a seat, and discovering something quietly unexpected. https://cfp.cccv.de/media/39c3-chaos-computer-music-club/submissions/8BNAFC/39C3-multilin_DDLXCxC.webp madonius https://events.ccc.de/congress/2025/hub/event/detail/flux-variations https://cfp.cccv.de/39c3-chaos-computer-music-club/talk/8BNAFC/ true 2025-12-30T21:00:00+01:00 21:00 02:00 Chaos Computer Music Club 39c3-10-mark-dj-team de DJ-Set DJ Set SLOWMOTIONDISCOEXPLOSION https://soundcloud.com/10-mark-dj-team https://cfp.cccv.de/media/39c3-chaos-computer-music-club/submissions/UDWLEK/Screenshot_202_daaXViB.png 10 Mark DJ Team https://events.ccc.de/congress/2025/hub/event/detail/10-mark-dj-team https://cfp.cccv.de/39c3-chaos-computer-music-club/talk/UDWLEK/ true 2025-12-30T23:00:00+01:00 23:00 01:00 Chaos Computer Music Club 39c3-arkifel-nanoloop en Live Performance live performance Dance to an internet tanuki playing live upbeat techno on a Gameboy Advance using nanoloop two, a software sequencer cartridge. Everything you hear is coming from one GBA! https://cfp.cccv.de/media/39c3-chaos-computer-music-club/submissions/JVKZWC/2023-06-10_GPN_Kut9s28.jpg ARKIFEL https://events.ccc.de/congress/2025/hub/event/detail/arkifel-nanoloop https://cfp.cccv.de/39c3-chaos-computer-music-club/talk/JVKZWC/ true 2025-12-31T00:00:00+01:00 00:00 02:00 Chaos Computer Music Club 39c3-yazz-ewok-dj-set de DJ-Set DJ Set Yazz Ewoks Mischung aus Melodic Techno, Indie Dance und kraftvollem Techno erschafft eine mitreißend wummernde Klanglandschaft. Mit ihrem Sound hat sie bereits auf der Fusion, dem Dockville, dem Habitat und dem 3000 Grad gespielt. Auch in Clubs wie dem Südpol nimmt sie ihr Publikum mit auf eine musikalische Bass-Reise. Als BIPoC und FLINTA* DJ ist sie schon seit mehr als zehn Jahren Teil der Hamburger Technoszene. https://cfp.cccv.de/media/39c3-chaos-computer-music-club/submissions/GHYAGT/1000014082_Tll7KR2.jpg Yazz Ewok https://events.ccc.de/congress/2025/hub/event/detail/yazz-ewok-dj-set https://cfp.cccv.de/39c3-chaos-computer-music-club/talk/GHYAGT/ true 2025-12-31T02:00:00+01:00 02:00 02:00 Chaos Computer Music Club 39c3-gregor-tresher de DJ-Set DJ Set In the trend-driven universe of electronic dance music, Gregor Tresher is the rare artist who transcends such cycles. His secret? A relentless focus on melody and timbre, timeless musical elements that other producers often undervalue. Just as a painting or a photograph appears to move if one stares at it long enough, close listening to the stratified grooves and melodies in Tresher's music reveals an organic universe of shifting sound. https://soundcloud.com/gregortresher https://cfp.cccv.de/media/39c3-chaos-computer-music-club/submissions/39AGRE/artworks-9B5m_PqsZeff.webp Gregor Tresher https://events.ccc.de/congress/2025/hub/event/detail/gregor-tresher https://cfp.cccv.de/39c3-chaos-computer-music-club/talk/39AGRE/ true 2025-12-31T04:00:00+01:00 04:00 01:30 Chaos Computer Music Club 39c3-finona-rider de DJ-Set DJ Set Renowned for vibrant sets and relentless crate-digging, she carries the spirits of the city’s underground. Where dancefloor rush meets quiet mind, she is pretty much into early-2000s minimal, rare electro, house-infused old-school Goa and well deserved bleeps and bloops. Sound has been a lifelong passion, but my deep love for dancefloor-related electronic music truly ignited through attending raves in my hometown. I immersed myself in arts, including studies in systematic musicology, event techniques and audio engineering, while working at Remoto-Records and constanly organizing events with my collective Phantasia at various locations, creating unique spaces for musical exploration, aswell as the launch of our own label, where you can also find my very first release on wax. I also perform under my artist alias problem.child, where I focus on CD-only sets featuring 90s and early 2000s Goa and progressive-house. Additionally, I hold a bi-monthly residency for my show Exo-Drive on London-based radio station Komrad 94 https://cfp.cccv.de/media/39c3-chaos-computer-music-club/submissions/W8LNRT/269701741_111_Ba8FlfX.webp Finona Rider https://events.ccc.de/congress/2025/hub/event/detail/finona-rider https://cfp.cccv.de/39c3-chaos-computer-music-club/talk/W8LNRT/ true 2025-12-30T10:00:00+01:00 10:00 03:00 Chill Floor 39c3-on-out de DJ Set Dj-Set On Out On Out playing a round with the beats and the grooves and the bits and the base and snippets and the grippets and the hippets ch ippsets and the ands and the outs.... Unnamed user https://events.ccc.de/congress/2025/hub/event/detail/on-out https://cfp.cccv.de/39c3-chaos-computer-music-club/talk/W7XYFT/ true 2025-12-30T13:00:00+01:00 13:00 03:00 Chill Floor 39c3-johanna-monsieur-le-schlo de DJ Set Dj-Set Zum sanften Ausklingen aus der digitalen Parallelhemisphäre führen Johanna und Monsieur Le Schlö mit abstrakten Elektronika, dubbigen Bassfiguren und metaphysischen Glitches durch den Nachmittag. Monsieur Le Schlö https://events.ccc.de/congress/2025/hub/event/detail/johanna-monsieur-le-schlo https://cfp.cccv.de/39c3-chaos-computer-music-club/talk/NBRT83/ true 2025-12-30T18:00:00+01:00 18:00 03:00 Vorglühmarkt 39c3-ingo-boss de DJ-Set DJ Set Ingo Boss Ingo Boss https://events.ccc.de/congress/2025/hub/event/detail/ingo-boss https://cfp.cccv.de/39c3-chaos-computer-music-club/talk/GVYGP3/ true 2025-12-30T10:30:00+01:00 10:30 00:50 SoS Stage H 39c3-how-research-tools-actually-break-user-stories-fro en, de other ## Session Description We constantly build, use, maintain, and adapt physical and digital tools and infrastructures — both inside and outside formal institutions, and far beyond classical environmental citizen science. This session invites participants involved in **community projects** to share concrete **user stories** about how they actually work: - what they try to do, - what doesn’t work, - what they avoid using, - what they need, - and why. Rather than presenting solutions or pitching an infrastructure, the session focuses on: ### Session Focus - **Lived practices and workflows** - **Shared experiences and bottlenecks** in maintaining infrastructure - **Research activities within communities**, including success stories - **Trust issues and refusals** related to infrastructure services - **Boundaries around data, governance, and centralisation**, with concrete project examples ### Method Participants will fill in short **user stories based on real situations**. These stories will be **anonymised** and analysed to identify patterns that can inform the **early design of a future research infrastructure (RIECS)** — before assumptions harden into technical or governance choices. --- ## About the Project **RIECS-Concept Project** (CORDIS) 🔗 https://cordis.europa.eu/project/id/101188210/de ### Connect with RIECS-Concept Follow us on Mastodon: 🔗 https://mastodon.social/@riecs_concept --- ## Get Involved **Shape the future of Research Infrastructure for Excellent Citizen Science in Europe** 👉 Sign up to be interviewed: 🔗 https://forms.gle/uVpB2uL6j8eufdZVA katy13 https://events.ccc.de/congress/2025/hub/event/detail/how-research-tools-actually-break-user-stories-fro true 2025-12-30T12:00:00+01:00 12:00 00:50 SoS Stage H 39c3-artifitial-life-from-random-programs en other Self-replicating programs spontaneously emerge from randomly initialized code in simple programming languages like Brainfuck, Forth, and assembly, without any designed replication mechanisms or fitness functions. Through self-modification and random interactions alone, these systems transition from "pre-life" chaos to "life" dynamics where replicators compete, evolve, and develop increasingly complex behaviors, offering new insights into how life itself might originate on any computational substrate. alg https://events.ccc.de/congress/2025/hub/event/detail/artifitial-life-from-random-programs true 2025-12-30T13:00:00+01:00 13:00 01:20 SoS Stage H 39c3-anarchistischer-antifaschismus-queere-prafiguratio de, en other Nachdem die ursprünglich für 14:30 an Tag 3 geplante Session dem migrantischen Widerstand umgewidmet wurde, hier nochmal ein neuer Termin. *** Diese Session wird sich aus den Erfahrungen und Begegnungen der bisherigen 39c3 ChaosTage speisen. Und wird den Versuch unternehmen, einige begonnene Überlegungen gemeinsam mit euch fortzuführen. Mehr Gespräch als Vortrag. Mehr gemeinsame Suchbewegungen vollführen, als für alles Antworten zu erwarten. Wir werden um folgende Themen kreisen, streifen und streicheln: + Präfiguration, ja gerne, aber wie? Wer mit wem? Und wozu? + Konflikte gehören zum Leben dazu, bei der Aushandlung von Bedürfnissen, und darüberhinaus, das ist nicht immer Friede, Freude, Eierkuchen, aber mit ein bischen üben und Bewusstseinskultur wird das was mit dem konstruktiv Streiten und Konflikte positiv transformieren + Ist Anarchismus als Begriff heute noch brauchbar? Praktisch, nicht theoretisch. + Wie bekommen wir es hin, dass beim Antifaschismus alle zusammen gegen den Faschismus arbeiten? [#widersetzen](https://events.ccc.de/congress/2025/hub/tag/widersetzen), und intersektional(er) darüberhinaus. + Oder wenn wir es anders nennen, unser gemeinsames Ziel dabei nicht verloren geht: eine für alle Lebewesen friedvolle, liebevolle, achtsame, freudvolle Welt in der die wechselseitigen Bedürfnisse uns die Orientierung für unser Handeln geben (so zumindest 1 Serviervorschlag von mir) und die Möglichkeiten und Ressourcen im Blick bleiben, wie wir das (um-)verteilen was es gibt, und die Verteidigung gegenüber denjenigen, die das nicht wollen und uns weiter angreifen werden. + Welche Kompetenzen und Reflexionsfähigkeiten fehlen uns aktuell noch, um belastbare intersektional orientierte (Kampf-)Bündnisse zu schmieden und aufrechtzuerhalten? + Und wofür das Ganze? (nochmal ein Ausblick Richtung Utopie? We will see... Freue mich auf bekannte und neue Gesichter und Körper. Lassen wir es glitzern und knallen, mit viel Alerta, alles Allen und bunten Einhörnern. Tomate_aka_Radikale_Liebe https://events.ccc.de/congress/2025/hub/event/detail/anarchistischer-antifaschismus-queere-prafiguratio true 2025-12-30T14:30:00+01:00 14:30 00:25 SoS Stage H 39c3-firefox-lead-engineer-ask-me-anything de, en other Ask anything about Firefox, I will try to answer every question, no matter what it is about, and I'll try to do so without corporate blah blah. No recordings, please. Disclaimer: Not an official Mozilla event, blah blah and in reality I'm actually a squirrel. About me: Principal Engineer and have been with Mozilla for almost 15 years. mozdeco https://events.ccc.de/congress/2025/hub/event/detail/firefox-lead-engineer-ask-me-anything true 2025-12-30T15:00:00+01:00 15:00 00:25 SoS Stage H 39c3-icoo-a-platform-for-activists en other iCoo is a group chat app where affinity groups can create collaborative networks! Get to know the Hat-Picker and start networking with your group! I'm trying to develop an app for the activist and intentional communities that is in essence a "Kickstarter, but for signing up affinity groups, instead of money. ObserverZero https://events.ccc.de/congress/2025/hub/event/detail/icoo-a-platform-for-activists true 2025-12-30T10:30:00+01:00 10:30 01:20 SoS Lecture E 39c3-sozialrecht-hacken-hartzen-fur-fortgeschrittene de other https://events.ccc.de/congress/2025/hub/de/event/detail/wer-liegt-hier-wem-auf-der-tasche-genug-mit-dem-burgergeld-fetisch-sturmt-die-palaste Nachdem in diesem Talk wahrscheinlich viel über Bürgergeld und "neue Grundsicherung" geredet wurde, gehen wir hier in einem praktischen Austausch zu einem selbstbewussten Umgang mit dem ganzen Scheiß. Es geht um Tipps, Tricks und Hacks im alltäglichen Umgang mit dem Jobcenter. Die Referentin bezieht bereits seit mehreren Jahren unsanktioniert Bürgergeld, ohne auch nur einen einzigen Termin wahrgenommen zu haben, aber das ganze soll mehr ein offener Austausch sein, bei dem alle etwas beitragen können, als ein linearer Vortrag. Luna https://events.ccc.de/congress/2025/hub/event/detail/sozialrecht-hacken-hartzen-fur-fortgeschrittene true 2025-12-30T12:00:00+01:00 12:00 00:25 SoS Lecture E 39c3-speedrun-hacking-medical-research-in-under-45-minu en other I made a bargain, now I have to keep up my end of the deal. This is the 10x sped-up version of my other talk on day 1 -- for the ADHD crowd, for anyone who missed the first talk, or for those that just wanna enjoy the show and have a laugh. [https://events.ccc.de/congress/2025/hub/en/event/detail/hacking-medical-research-for-a-better-transition](https://events.ccc.de/congress/2025/hub/en/event/detail/hacking-medical-research-for-a-better-transition) This is a speedrun. I cannot select less than 25 minutes, but I do not intend to go over 5 minutes unless I have to reset. I would prefer to do this as lightning talk, but I'm not sure they support LiveSplit. ShadowCone (she/her) https://events.ccc.de/congress/2025/hub/event/detail/speedrun-hacking-medical-research-in-under-45-minu true 2025-12-30T12:30:00+01:00 12:30 00:25 SoS Lecture E 39c3-modern-typesetting-and-latex-alternative-typst-mee en, de other Are you interested in Typst – the elegant typesetting system and FINALLY a modern alternative to LaTeX? Then come to our Typst Meet-Up! Whether you already have experience with Typst and want to showcase your own projects or templates, or whether you are completely new and want to get to know the tool – everyone is welcome! What we want to do and share with you: - Short introduction and overview for beginners - Exchange with other Typst users and interested parties - Presentation of your own projects, templates and tricks at distributed tables - Open question and answer session Feel free to bring your laptop to participate live or present your work. We look forward to exciting discussions and exchanges about Typst! SwaP https://events.ccc.de/congress/2025/hub/event/detail/modern-typesetting-and-latex-alternative-typst-mee true 2025-12-30T13:00:00+01:00 13:00 00:50 SoS Lecture E 39c3-realismus-beim-sf-weltenbau-was-wir-aus-der-geschi de other So wie das Fantasy-Genre oft das Mittelalter abbildet und weiterdenkt, kann man sich auch in der Science Fiction an der realen Geschichte orientieren, vor allem dann, wenn sie realistisch sein soll. Das gilt natürlich auch für Fantasy Weltenbau. Themen: Wie man Technologie entwickelt: z.B. FTL Alles immer größer & teurer? oder kleiner? Inseln und Entdecker Die Größe der bekannten Welt: Reisen und Nachrichten Von Vögeln und schwarzen Löchern Wer bezahlt? Geografie rulez Wie entstehen neue Technologien? Wie sind sie früher entstanden? Wird alles immer größer, oder auch einmal kleiner und effizienter? Wie entwickeln sich Gesellschaften und Konflikte? Welche wirtschaftlichen und infrastrukturellen Voraussetzungen braucht es, um kilometergroße Battleships zu bauen? Wie viele Menschen passen eigentlich auf die Erde? Was bedeutet Postapokalypse im historischen Kontext? Warum sollten wir das Sonnensystem besiedeln und Planeten terraformen? Falls es Aliens gibt, sind wir dann Forscher, Siedler und Eroberer? Oder sind wir eher die Eroberten, wie einst die Bewohner der Pazifikinseln? Viel Material für eine realistische Geschichte der Zukunft, basierend auf realer Wissenschaft und historischen Mustern. Wolfspelz https://events.ccc.de/congress/2025/hub/event/detail/realismus-beim-sf-weltenbau-was-wir-aus-der-geschi true 2025-12-30T14:00:00+01:00 14:00 00:25 SoS Lecture E 39c3-web-browser-fingerprinting-survey-of-attacks-and-m en other ylt https://events.ccc.de/congress/2025/hub/event/detail/web-browser-fingerprinting-survey-of-attacks-and-m true 2025-12-30T14:30:00+01:00 14:30 01:20 SoS Lecture E 39c3-congress-metatalk de other Wir tauschen uns ein bisschen über die Entwicklung des Congress über die Jahre aus, nicht nur aber insbesondere in Bezug auf Zugänglichkeit. Und wir können sowohl über positives als auch über negatives reden. Endlich wieder vier statt nur drei SoS-Spaces, wunderbar! Aber keine SoS mehr zwischen 02:30 und 10:30? Scheiße weil wtf, das ist ein Drittel weniger Congress, oder geil weil endlich mal Zeit wo man ohne FOMO schlafen kann? Engelküche nur noch für drei Arbeitsstunden pro Mahlzeit, fatal oder cool weil endlich das Essen reicht und die Schlangen kürzer sind? Keine Captchas mehr beim Ticketkauf. Cool weil Barrierefreiheit oder ein riesiges Problem wegen Bots? Und können wir vielleicht auch den im Fediverse kursierenden Gerüchten um verbotene Assembly-Aktivitäten auf den Grund gehen? Wichtig: Das ist KEIN Feedback-Event für die Congress-Orga. Menschen von der Orga sind herzlich eingeladen dabei zu sein und Dinge als Feedback zu verstehen wenn sie wollen, aber ich organisiere das als von der Orga unabhängige Einzelperson und es geht einfach nur um einen Austausch und unterschiedliche Blickwinkel darauf, wie der Congress sich entwickelt für Menschen die sich darüber gerne austauschen würden. Luna https://events.ccc.de/congress/2025/hub/event/detail/congress-metatalk true 2025-12-30T11:00:00+01:00 11:00 00:50 SoS Workshop D 39c3-lets-build-our-own-cursor-themes-for-linux en other Since a couple of years, I've been using a custom mouse cursor theme – the cursor is a turtle emoji! Sometimes I forget that it exists, and people are amused that there's a turtle on my screen! :D In this workshop, I'll explain how cursor themes work on Linux, and teach you how to generate your own one! It could be anything you want – some ideas: - Draw your own arrows (cool-looking? Weird ones?) - Repurpose your favorite icons/logos (so that everyone immediately knows that you're using Arch btw) - Blåhajs?! - High-contrast cursors that are actually more accessible to you Bring a Linux laptop! And it'd be ideal if you could already install the vector graphics program Inkscape and the command line tool `xcursorgen`! I'll show you a little script that will help you generate the theme. If you feel comfortable with another graphics program, you can also use that instead of Inkscape. The resulting themes work both on X.Org as well as Wayland. blinry https://events.ccc.de/congress/2025/hub/event/detail/lets-build-our-own-cursor-themes-for-linux true 2025-12-30T12:00:00+01:00 12:00 01:20 SoS Workshop D 39c3-neurodivergenz-meetup de, en other Meetup - Revival of 37C3 and 38C3 We want to get to know each other (better) and chat about the everyday madness of living in a neurotypical world. Anyone who identifies as neurodivergent, particularly those with ADHD and/or autism, is welcome to join us. https://pads.haecksen.org/l9_SiCHvTNK4Tt-ySUeVVQ?view No official diagnosis is necessary. If you don't have one or are still unsure, you are just as welcome. :-) We'll start by collecting topics and then form discussion groups on these topics at individual tables. It is possible to switch tables during the event. Feel free to join us even after the event has started. There's no such thing as being late with us, we'll be there until the end of the SOS and are happy to see more of you. <3 Deanna (keins/none-they/them) https://events.ccc.de/congress/2025/hub/event/detail/neurodivergenz-meetup true 2025-12-30T13:30:00+01:00 13:30 00:25 SoS Workshop D 39c3-steno-meetup-introduction en, de other A meetup for steno enthusiasts, users & those interested in stenography (both machine stenography & shorthand) There will be a short introduction presentation on how machine stenography works (specifically the Plover theory, as that is freely available & the one I'm most familiar with), and I'll also bring all my hardware so you can try it out on your own devices - you do need Plover installed on your own laptop though to be able to use that hardware (https://github.com/openstenoproject/plover). I'm looking forward to seeing what kind of hardware & theories others are using, so do bring your things ^^ (If enough people show up we'd just continue after the 25min somewhere else) 42triangles (she/her) https://events.ccc.de/congress/2025/hub/event/detail/steno-meetup-introduction true 2025-12-30T14:00:00+01:00 14:00 00:50 SoS Workshop D 39c3-block en other Just like last congress we'll sit and chat about your submitted questions and thoughts. If you want to submit an idea or question, find the question box around one of our events, or at the Relationship Geeks assembly. zenme https://events.ccc.de/congress/2025/hub/event/detail/block true 2025-12-30T15:00:00+01:00 15:00 00:50 SoS Workshop D 39c3-relation-anarchy-and-solo-poly-meet-up_d41j other Abstract: Meet up for those identifying as solo-poly or relationship anarchist, to meet and share experiences. Description: A meetup for those who identify as Relationship Anarchist or Solo Poly, we like to share experiences and thoughts that we run into within these contexts. If you identify as a Relationship anarchist or as Solo Polo, even if you're not in such a relationship now or have been. We want to share out experiences and thoughts on the topic, but it's not an introduction catileptic (they/she) https://events.ccc.de/congress/2025/hub/event/detail/relation-anarchy-and-solo-poly-meet-up_d41j true 2025-12-30T10:30:00+01:00 10:30 00:25 SoS Saal 6 39c3-chaos-im-thw-meetup de other THW is the civil defense agency of Germany. We will meet with people in the Chaos universe and THW to discuss topics in civil defense and disaster relief. Everyone is welcome to join us. The session will be mainly in German. Questions and discussions can also be held in english. jp https://events.ccc.de/congress/2025/hub/event/detail/chaos-im-thw-meetup true 2025-12-30T11:00:00+01:00 11:00 00:50 SoS Saal 6 39c3-vegan-chaos-farewell-meeting de, en other **Today we are pulling down our tents.** We are meeting as vegan hacktivists and beings with an interest in animal rights and sustainability for a farewell meeting - to look back together on what we have experienced and to make concrete arrangements: How do we continue organising the Vegan Chaos Community? What are the next ideas, plans and projects? There will also be opportunities for personal get-togethers after the Congress: Is a Vegan Chaos travelling group forming for other Chaos events? What else could happen next? Come along, let's put our heads together! ### More Information: - To the **[Vegan Chaos Community Assembly](https://events.ccc.de/congress/2025/hub/en/assembly/detail/vegan_chaos)** - Follow us at Mastodon: **[@vegan@chaos.social](//chaos.social/@vegan)** ### Our Events: - 27.12. | 13:00 | Room D | **[Vegan Chaos: Welcome Meet & Greet](https://events.ccc.de/congress/2025/hub/en/event/detail/vegan-chaos-welcome-meet-greet_zdm4)** - 27.12. | 20:30 | Assembly | **[Vegan Chaos: Let's Talk](https://events.ccc.de/congress/2025/hub/en/event/detail/vegan-chaos-lets-talk-day-1)** - 28.12. | 11:30 | Assembly | **[Vegan Chaos: Let's Talk](https://events.ccc.de/congress/2025/hub/en/event/detail/vegan-chaos-lets-talk-day-2)** - 29.12. | 13:00 | Room D | **[Vegan Chaos: Bring-Along Fingerfood Brunch](https://events.ccc.de/congress/2025/hub/en/event/detail/vegan-chaos-bring-along-fingerfood-brunch)** - 29.12. | 18:30 | Assembly | **[Vegan Chaos: Let's Talk](https://events.ccc.de/congress/2025/hub/en/event/detail/vegan-chaos-lets-talk-day-3)** - 30.12. | 11:00 | Room 6 | **[Vegan Chaos: Farewell Meeting](https://events.ccc.de/congress/2025/hub/en/event/detail/vegan-chaos-farewell-meeting)** [](https://events.ccc.de/congress/2025/hub/en/assembly/detail/vegan_chaos) ganzesaetze (he/him) phil_vcc (he/him) https://events.ccc.de/congress/2025/hub/event/detail/vegan-chaos-farewell-meeting true 2025-12-30T12:00:00+01:00 12:00 00:25 SoS Saal 6 39c3-mechanical-keyboards-show-and-tell en, de other Bring your niche keyboards and show them to everybody interested. deBaer https://events.ccc.de/congress/2025/hub/event/detail/mechanical-keyboards-show-and-tell true 2025-12-30T12:30:00+01:00 12:30 00:55 SoS Saal 6 39c3-how-to-keep-open-source-open-without-leaving-our-c en other This workshop is to establish a longer term working group that will threat model and abusability test (different from abuse test) common open source governance and community frameworks. The primary focus of this session is for Phase 1 preparation: communications norms around this project. Recent years have seen an increase in stress and pressure resulting from both actor and non-actor harms due to the pivot in how we manage our OSS communities in digital spaces. To better equip the broader OSS community with how to document, detect, and handle these issues we need to threat model and abusability test common governance and community frameworks and publish relevant guidance. In this session, we are starting with Phase 1: building communication norms. This is because the work that follows carries inherent risk as we identify, research, and model these frameworks. We'll also publish our recommended communications practices regarding sensitive information in open source. Github: [https://github.com/nivenly/securing-open-source-communities-wg/](https://github.com/nivenly/securing-open-source-communities-wg/) Presentation @ 11:00 Day 4: [https://events.ccc.de/congress/2025/hub/event/detail/how-to-keep-open-source-open-without-leaving-our-communities-open-to-threats](https://events.ccc.de/congress/2025/hub/event/detail/how-to-keep-open-source-open-without-leaving-our-communities-open-to-threats) quintessence (she/her) https://events.ccc.de/congress/2025/hub/event/detail/how-to-keep-open-source-open-without-leaving-our-c true 2025-12-30T13:30:00+01:00 13:30 00:50 SoS Saal 6 39c3-lesezeichen-2-das-javascript-schlagt-zuruck de other What if your browser bookmarks didn't just save an address, but unlocked a whole arsenal of features? I'll show you how to unleash the power of the modern web directly from your bookmarks bar with bookmarklets. Whether it's webcam access, clipboard hacks, full-screen action or spontaneous library reloading, this talk is a firework display for anyone who loves JavaScript and wants to push boundaries. There are also tips on minification, troubleshooting, and even creating blobs and playing sounds. Nerdy, practical, surprising – a must for web tinkerers and JavaScript Jedis 🥷 Some of the bookmarklets: https://hackmd.io/MhSV_LgMT96Wb4A8D_tajg?view Birdy1976 https://events.ccc.de/congress/2025/hub/event/detail/lesezeichen-2-das-javascript-schlagt-zuruck true 2025-12-30T14:30:00+01:00 14:30 01:20 SoS Saal 6 39c3-ccc-ch-gettogether de, en other The usual CCC Switzerland Gettogether, but at congress. Some organisational stuff, some meet&greet. Primarily in German, but we can switch to English if needed. fence https://events.ccc.de/congress/2025/hub/event/detail/ccc-ch-gettogether true 2025-12-30T09:30:00+01:00 09:30 00:50 Komonin 39c3-wie-kann-gute-mannerarbeit-gelingen-all-creatures- de, en other Hallo, ich muss euch leider mitteilen, dass ich den Workshop absagen muss, da ich mir eine Erkältung eingefangen habe, und wenig Stimme und Energie habe und das gerade über meine Kapazitäten geht. Tut mir sehr Leid, hätte das gerne mit euch gemacht Für diejenigen die trotzdem vernetzt bleiben wollen, gibt es eine Signalgruppe zu konstruktiver Männerarbeit im Chaos: https://signal.group/#CjQKILTHwUeZ6z5tjh2aFLFUJqDUBZdc4RM6pQrtinvOgCnJEhB6V3OHw1wAe73YgRwRbCKG Dies ist der Folgeworkshop zum vorherigen Männerkreis. Wir glauben dass es wichtig ist, dass wir Männer explizit von FLINTA* lernen, daher all creatures welcome. In dem Workshop wollen wir uns zu folgenden Fragen ins Gespräch kommen: - Welche Erfahrungen haben wir mit Männerarbeit? - Wie holen wir uns (auch außerhalb der Bubble) ab? - Wie schaffen wir es den Bruch zu unseren Schwestern* anzuerkennen und auszuhalten ohne uns dabei zu entmündigen und zu verachten - Wie schaffen wir es unsere Schutzwalle soweit unten zu lassen, damit wir lernen können, aber trotzdem liebevoll und sorgsam mit uns umzugehen? - Wie können wir uns trotz unseres internalisiertem Leistungsanspruchs erlauben uns klein, bedürftig und unsicher zu zeigen? Ich bin Timon (er) von menbracing. Wir sind eine kleine Initiative von Männern die sich inspiriert von der Arbeit von Bell Hooks, Adrienne Maree Brown, Veit Lindau und Anderen an männlicher Care-Arbeit versuchen. muckla https://events.ccc.de/congress/2025/hub/event/detail/wie-kann-gute-mannerarbeit-gelingen-all-creatures- false 2025-12-30T10:30:00+01:00 10:30 00:25 Komonin 39c3-transdermal-hrt-brewing-for-beginners de, en other In this workshop we will learn how to make easy transdermal HRT (Hormone Replacement Therapy) products for trans people ourselves! The two variants are sprays and gels, there are enough base ingredients for both. I forgot to register this workshop earlier but you can just join us at any time at our assembly Projekt31 for a workshop. Lizzz (they / she) https://events.ccc.de/congress/2025/hub/event/detail/transdermal-hrt-brewing-for-beginners false 2025-12-30T11:00:00+01:00 11:00 00:50 Komonin 39c3-repairable-device-meeting-all-creatures-welcome de, en other We look forward to seeing all users, interested parties, and other beings! We ourselves are Fairphone Angels and will be bringing Fairphone 3, Fairphone 4, and Fairphone 6 along for you to look at and, of course, open up. Feel free to bring other devices too! We will be meeting in a relaxed atmosphere to exchange ideas; there is no planned program. In addition, various custom ROMs will certainly be represented. We welcome any further input! Of course, all creatures are welcome! Dia (she/her) mde (he/him) t_aus_m (they/them, er/ihm) https://events.ccc.de/congress/2025/hub/event/detail/repairable-device-meeting-all-creatures-welcome false 2025-12-30T12:00:00+01:00 12:00 00:50 Komonin 39c3-ein-fast-werbefreites-internet-mit-einem-pihole-fi de other In dieser Session zeigen wir, wie Ihr in weniger als 20 Minuten und Kosten für Hardware von weniger als 30 Euro einen Werbefilter bauen könnt. Vorkenntnisse: keine außer allgemeine Neugier Hardwareanforderungen: keine (für die Live Demo), falls Ihr mitmachen möchtet irgend ein Microcomputer mit RasPiOs oder Debian und SSH Hintergrund: bei vielen Endgeräten bzw. Softwareprodukten ist es immer schwerer, Werbung und Tracking herauszufiltern (insbesondere bei Smartphones). Dort sind die Plugins wie UBlock Origin entweder nicht verfügbar oder sie gelten nur für den Browser und nicht für die Apps. Die Lösung ist, auf dem Weg in das Internet einfach eine Sperrliste zu haben, die alle Verbindungen zu Werbeanbietern blockt. Eine gängige OpenSource Lösung ist PiHole. Es braucht nur minimale Hardware. Ein Raspberry Pi für weniger als 30 Euro reicht dafür aus oder ein alter Computer, der sonst keine Aufgabe mehr hat. In der Session zeigen wir wie einfach es ist, ein PiHole aufzusetzen und in das Heimnetzwerk einzubinden. Seid gespannt auf das neue Nutzungserlebnis eines Internets (fast) ohne Werbung. Wir stellen eine Linkliste zur Verfügung. Damit könnt Ihr das Gezeigte zu Hause "nachbauen" könnt: http://ohok.org/pi-hole-links Fabiandreas https://events.ccc.de/congress/2025/hub/event/detail/ein-fast-werbefreites-internet-mit-einem-pihole-fi false 2025-12-30T13:00:00+01:00 13:00 00:50 Komonin 39c3-neinzurbezahlkarte-summit_bo8n de, en other We invite the initiatives organised in the network ‘Equal Social Rights for All’ that have found their way to 39c3 to a networking meeting. If you are active in an initiative against the racist AsylbLG, are committed to fighting against the discriminatory payment card, or have already carried out or are planning to carry out exchange campaigns in your local area, you are very welcome to join us – even if you are not yet familiar with the network! neinzurbezahlkarte https://events.ccc.de/congress/2025/hub/event/detail/neinzurbezahlkarte-summit_bo8n false 2025-12-30T15:00:00+01:00 15:00 00:25 Komonin 39c3-against-antisemitsm-jewish-safe-space de, en other Are you jewish or feel connected? Are you affected by antisemetism or want know what can be done against it? We want to provide a safe space. Come by. Let's have a chat or grab a drink together. wackelpudding https://events.ccc.de/congress/2025/hub/event/detail/against-antisemitsm-jewish-safe-space false 2025-12-30T15:30:00+01:00 15:30 00:25 Komonin 39c3-introduction-to-hardware-hacking-with-the-swo_t4v5 en other Introduction to a multi-stage hardware Capture the Flag platform designed for learning hands-on embedded hacking. Creator https://events.ccc.de/congress/2025/hub/event/detail/introduction-to-hardware-hacking-with-the-swo_t4v5 false 2025-12-30T14:00:00+01:00 14:00 01:00 Komonin 39c3-komona-teardown-meeting_f7ah other Last komona plenary! It was a blast - now let's discuss how to tear everything down again, and have a round on what to think about next year. https://events.ccc.de/congress/2025/hub/event/detail/komona-teardown-meeting_f7ah false 2025-12-30T10:00:00+01:00 10:00 01:00 Shared Table 13 39c3-streckenkunde-open-data-fur-eisenbahn-sop other by cloudmarker97  (DECT 6112) https://events.ccc.de/congress/2025/hub/event/detail/streckenkunde-open-data-fur-eisenbahn-sop false 2025-12-30T14:00:00+01:00 14:00 00:50 Shared Table 13 39c3-beyond-keycloak-opensource-for-identity-governance de, en other A small talk / success story (and discussion) about stepping up from SSO to effective IGA. I would like to share what my organization went through to have effective identity governance ahead of NIS-2 and the role of open source in this endavour. Would also love to discuss your current experiences or journeys in the IAM space! Dependig on our guests, this talk may be held in German or English. // Location Hint: Shared Table 13 is at the left side of the foyer in front of hall 3. // The shared tables have little stands with yellow rockets and the table number at the center. mark.twofive https://events.ccc.de/congress/2025/hub/event/detail/beyond-keycloak-opensource-for-identity-governance false 2025-12-30T10:30:00+01:00 10:30 00:25 Shared Table 11 39c3-bicycle-enthusiasts-and-courier-meetup_pli4 en, de other THE Bicycle Messenger and bicycle enthusiast meetup at 39c3. Let's get to know each other and talk about bikes and [#messlife](https://events.ccc.de/congress/2025/hub/tag/messlife). fabu (he/him) https://events.ccc.de/congress/2025/hub/event/detail/bicycle-enthusiasts-and-courier-meetup_pli4 false 2025-12-30T12:00:00+01:00 12:00 00:25 Shared Table 9 39c3-1d-con-1d-game-developers-conference_9i76 en, de other We who are interested in the future of 1D-Gaming know, that Pong is only the tip of the iceberg regarding the 1D-gaming industry. At 39c3 this year will be the largest gathering in the history of 1D-Game-Development. Single Dimension Studios will present their new sports title CURLING. Team1, the developers of retro classic WORM will present their new roguelike DARKEST ROAD. Highlight will be the presentation of the first 1D-Gaming-Console in the history of gaming: The Linear Entertainment System (LES). The rest of the program will include talks and teasers for RPG titles like BENEATH APPLE TOWER and DWARF SHAFT, sports titles like LINE DANCER 2025, TONY FAWK'S SLACK LINER PRO and many many more. Seats are limited due to press interest, arriving early suggested. fabu (he/him) https://events.ccc.de/congress/2025/hub/event/detail/1d-con-1d-game-developers-conference_9i76 false 2025-12-30T13:00:00+01:00 13:00 00:25 Shared Table 4 39c3-raphson-music-player-demo en other Web-based self-hosted social music player for parties or social spaces. What makes this different from other music players? It is designed around listening with groups. Instead of playing a single playlist, this music player allows enabling many playlists from different people. Tracks are shuffled from multiple playlists into a single queue. No more arguing about which music to play, everyone's music get played. An additional benefit of this is music discovery; even when you're listening solo you might like to mix up your own music with someone else's. derkades https://events.ccc.de/congress/2025/hub/event/detail/raphson-music-player-demo false 2025-12-30T14:00:00+01:00 14:00 00:25 Shared Table 2 39c3-subtitles-team-treffen de other phlmn https://events.ccc.de/congress/2025/hub/event/detail/subtitles-team-treffen false 2025-12-30T10:00:00+01:00 10:00 02:00 Stonewall IO (Saal Y 06) 39c3-chaotischer-schreiben-mehr-erzahlen-ein-kollaborat de Workshop long „Hattest du einen schönen Congress?“ „Ja klar, also…ähm…was erzähle ich jetzt?“ Der Congress ist intensiv. Er inspiriert, überfordert, überrascht und berührt. Gemeinsam extrahieren wir unsortierte Congress-Erlebnisse aus dem Cache und booten neu. Gar nicht so einfach, in Worte zu fassen, was zwischen LEDs und Gesprächen, Vorträgen und Hallen, Workshops und Zufallsmomenten entsteht. in diesem Workshop erproben wir Methoden des kreativen und ethnographischen Schreibens. Wir schreiben für uns allein und kollaborativ, ausgehend vom Congress, über uns und diese Welt. Schreiben kann mehr sein als eine Technologie, um sensorische Signale zu speichern. Schreibend lässt sich reflektieren und die Welt gestalten. Schreiben ist in diesem Sinne eine politische Praxis. Die Geschichten, die wir über die Welt erzählen und uns darin erzählen, prägen, was wir für möglich halten. Kultur, Wissen, Weltordnungen werden von Menschen geschrieben, gelesen und weitergetragen. Wenn wir selbst zu Schreibenden werden, können wir diese Geschichten anders erzählen, verschieben und aufbrechen. Hier knüpfen wir an „speculative fabulations“ (Donna Haraway) an: die Idee, neue Zukünfte zu erfinden, indem wir anders erzählen. Wir begreifen ethnografisches Schreiben als eine Praxis des „reflecting selves and others“: eine Form, die uns erlaubt wahrzunehmen, wie wir selbst und andere in Beziehung stehen, sich bewegen, fühlen, handeln. Mit praktischen Übungen, kleinen Inputs und gemeinsamen Diskussionen probieren wir verschiedene Zugänge aus: vom freien Schreiben über Vignetten bis hin zu kollaborativen Texten, die aus unseren Congress-Erlebnissen heraus entstehen. Vorkenntnisse sind nicht erforderlich, aber willkommen. Bringt euch angenehmes Schreibzeug mit: Laptop, Telefon oder Papier und Stift. Zusätzlich haben wir auch Papier und Stifte da. Lisa Tschorn Isabella Kölz https://events.ccc.de/congress/2025/hub/event/detail/chaotischer-schreiben-mehr-erzahlen-ein-kollaborat https://pretalx.c3voc.de/39c3-haecksen-workshops-2025/talk/MJXDV7/ https://pretalx.c3voc.de/39c3-haecksen-workshops-2025/talk/MJXDV7/feedback/ true 2025-12-30T12:15:00+01:00 12:15 01:30 Stonewall IO (Saal Y 06) 39c3-cccrip-auskotzrunde de Workshop long Zielgruppe für diesen Workshop sind be_hinderte Congress-Besucher:innen (CCCrips). Eine Hackspace- oder C3-Mitgliedschaft ist komplett optional. Wir wollen uns untereinander kennenlernen, Erfahrungen austauschen, und Pläne schmieden! Weltherrschaft, anyone? Inhalte bzw. Ziel: Vernetzung! Endlich mal "diese Leute aus dem Internet" kennenlernen. Erfahrungen austauschen. Ideen sammeln, wie Dinge vor Ort und für zukünftige Events zugänglich(er) gemacht werden. Seit der ersten Auskotzrunde am 37C3 sind einige neue Kontakte und digitale Räume zum Austausch über die Veranstaltung hinweg entstanden. Klärung: Be_hinderung kann viele verschiedene Formen haben. Wir wollen hier einen Raum schaffen, in dem viele verschiedene Menschen sich miteinander austauschen können. Eine "offizielle" Diagnose ist dafür absolut nicht notwendig! Wenn du dich selbst als be_hindert beschreibst, bist du hier richtig. Inhaltswarnung: Wir sprechen über unsere Be_hinderungen. Voraussichtlich werden dabei auch negative Erfahrungen geteilt. Und es gilt, hier erst recht: nehmt Rücksicht auf euch selbst, und auch auf andere! pascoda lavalaempchen https://events.ccc.de/congress/2025/hub/event/detail/cccrip-auskotzrunde https://pretalx.c3voc.de/39c3-haecksen-workshops-2025/talk/7CKLXH/ https://pretalx.c3voc.de/39c3-haecksen-workshops-2025/talk/7CKLXH/feedback/ true 2025-12-30T14:00:00+01:00 14:00 01:45 Stonewall IO (Saal Y 06) 39c3-wie-funktioniert-das-it-netzwerk-zuhause-netzwerk- de Workshop long Ich möchte mit euch das Netzwerk erkunden, vom Endgerät bis zum Router, der das Internet "anruft". Wir werden uns auf das lokale Netzwerk beschränken und zum Schluss einmal durch spielen was im Netzwerk auf der Leitung eigentlich passiert. Du hast keine oder kaum Ahnung von IT-Netzwerktechnik und wolltest immer schon mal wissen, was da eigentlich passiert? Was läuft zwischen Router/Fritzbox und unserem Endgerät ab, damit wir im Internet surfen können? Wenn dich das interessiert, dann ist dieser Workshop vielleicht was für dich. Denn es soll darum gehen, wie die Basics der Netzwerk-Technik funktionieren. Dabei werden wir in Gruppen die Regeln in einem Netzwerk erkunden und zwar Schicht für Schicht. Als Leitfaden orientieren wir uns am OSI-Model, das Modell der Netzwerktechnik, an das sich keiner hält. Es wird um MAC-Adressen, IP-Adressen, Ports, UDP und TCP gehen. Weil alle Theorie irgendwie staubig ist, geht es in diesem Workshop einen Schritt weiter. Die erkundeten Regeln werden in einem Netzwerkspiel ganz praktisch umgesetzt, in dem wir Netzwerkwitze durch ein Netzwerk schicken. Dafür brauchen wir imaginäre Brieftauben nach RFC 1149 und 6214 (bitte keine realen Flugtiere und Fluggeräte mitbringen - Danke) und einige imaginäre Hardware. Bitte Humor, Fantasie und Laptop mit RJ45-Anschluss(LAN/Ethernet-Kabel) zur Recherche mitbringen (Teilnahme ohne Hardware ist auch möglich). Die Ergebnisse sollen am Ende allen Workshop-Teilnehmenden zur Verfügung gestellt werden, zum mitnehmen. ContentNote: Das Netzwerkspiel kann bewegungsintensiv sein. Folien: https://codeberg.org/ratten/39c3_Haecksen_Workshop_Netzwerk_basics Bücherratten https://events.ccc.de/congress/2025/hub/event/detail/wie-funktioniert-das-it-netzwerk-zuhause-netzwerk- https://pretalx.c3voc.de/39c3-haecksen-workshops-2025/talk/SHEUGT/ https://pretalx.c3voc.de/39c3-haecksen-workshops-2025/talk/SHEUGT/feedback/ true 2025-12-30T15:00:00+01:00 15:00 01:00 Kidspace - Spielparadies 39c3-kraftvolle-defragmentierung other The Kidspace is facing a fragmentation issue – time for a proper cleanup! Before we initiate the shutdown, let’s work together to organize the blocks, delete unnecessary data, and defragment the chaos. Join the Defragmentation taskforce, whether you're Level 1 or 99. Feel free to grab your instructions from the Orga team anytime. https://events.ccc.de/congress/2025/hub/event/detail/kraftvolle-defragmentierung false 2025-12-30T14:00:00+01:00 14:00 01:00 Art & Play: Bus Stage 39c3-christian-faubel-electronic-oscillators-for-organi other Die Ergebnisse des Workshops „Elektronische Oszillatoren für organische Muster und Polyrhythmen“ werden in einer Jam-Session präsentiert. Dazu werden die im Workshop entstandenen Soundboards verwendet. The results of the workshop “Electronic Oscillators for Organic Patterns and Polyrhythms” will be presented in a jam session. The soundboards created in the workshop will be used for this purpose. [https://christian.faubel.derstrudel.org](https://christian.faubel.derstrudel.org) [https://post.lurk.org/@derstrudel](https://post.lurk.org/@derstrudel) Marty https://events.ccc.de/congress/2025/hub/event/detail/christian-faubel-electronic-oscillators-for-organi false 2025-12-30T10:30:00+01:00 10:30 00:15 CDC Triangle 39c3-nextgraph-demo-local-first-e2ee-rdf-graph-db-and-a en Talk [NextGraph](https://nextgraph.org/) is a framework aimed at making live collaboration, offline support, end to end encryption, and application interoperability easy. In this demo, I will walk you through the basics of NextGraph and our new TypeScript SDK. The new TypeScript SDK turns RDF graph database records into ordinary, typed objects with instant two‑way binding. By proxying those objects and emitting signals, the SDK provides a framework‑agnostic reactive layer that integrates cleanly with React, Vue, and Svelte. **You will** get a short introduction to NextGraph, RDF (a graph data format designed for interoperability), and a live demo walking through a simple property change, showing how a mutation is instantly persisted to the database, syncronized, and reflected in UI components across React, Vue, and Svelte. https://pretalx.riat.at/media/39c3/submissions/QTQHYH/a7c8b107494862a5a52734575d6aafd3_1KlsQga.png Laurin Weger https://events.ccc.de/congress/2025/hub/event/detail/nextgraph-demo-local-first-e2ee-rdf-graph-db-and-a https://pretalx.riat.at/39c3/talk/QTQHYH/ false 2025-12-30T10:45:00+01:00 10:45 02:00 CDC Triangle 39c3-seedsigner-diy-bitcoin-signing-device-build-w_312i en Workshop Build your own open-source Bitcoin signing device with a Raspberry Pi Zero, camera and display! We have kits for 45€ Seedsigners are open-source DIY signing devices which can be built using "normal" hardware like a Raspberry Pi and act as kind of hardware wallets to sign Bitcoin transactions. Since the hardware is missing a secure element chip, the keys are saved externally, usually via self-drawn QR-codes which are read again for every use via the build-in camera. We brought a few kits with us which we sell for 45€ and build together. We will lashing the firmware on the MicroSD card and then build everything together in the 3d-printed enclosure. The kit includes: Raspberry Pi Zero 1.3 (without Wifi or Bluetooth chip), GPIO-header already soldered Display-Hat with joystick and buttons Camera 64GB MicroSD card MicroUSB to USB-C cable 3D printed enclosure 6 printed templates for self-drawn QR-Codes https://pretalx.riat.at/media/39c3/submissions/UZPXRN/Make-Your-Own-Case_5rF3wqh.png freerk https://events.ccc.de/congress/2025/hub/event/detail/seedsigner-diy-bitcoin-signing-device-build-w_312i https://pretalx.riat.at/39c3/talk/UZPXRN/ false 2025-12-30T13:00:00+01:00 13:00 00:30 CDC Triangle 39c3-whats-new-in-reticulum en Talk We will give a brief introduction to the Reticulum Network Stack and announce what is new in 2025: - Reticulum will soon be available in Rust, which will allow users of embedded systems a better performance. - The new Reticulum BLE Interface enables the creation of autonomous mesh networks without any further hardware or central server. The interface can be used on Linux and Android. - The Columba App for Reticulum lowers the barrier of entry for using Reticulum. fluorescent_beige Liam https://events.ccc.de/congress/2025/hub/event/detail/whats-new-in-reticulum https://pretalx.riat.at/39c3/talk/LZWMFU/ false 2025-12-30T13:30:00+01:00 13:30 00:30 CDC Triangle 39c3-solidarity-finance-on-p2p-rails en Talk What would it look like to build financial infrastructure for solidarity rather than speculation? While blockchain technology has largely been captured by libertarian and extractive market logic, it certainly does not need to be that way. In this talk, we'll explore Solidarity Primitives, development and architectural design patterns designed to forge economic solidarity between individuals and collectives. Drawing from our work at Bread Cooperative and research I've documented through my podcast, The Blockchain Socialist, we'll examine concrete examples like the BREAD community token, savings circles implementation, and the Solidarity Fund mechanisms that enable participatory funding without relying on venture capital or traditional financial intermediaries. We'll discuss how these primitives address a critical gap: the technical and coordination barriers that have historically made alternative economic models difficult to implement at scale. From worker cooperatives to mutual aid networks, the infrastructure simply hasn't existed. Peer-to-peer technologies can change that but only if designed with solidarity, not profit maximization, as the core principle. This talk is for anyone interested in the practical dimensions of building a post-capitalist economy: what does it actually look like to write code for collective autonomy? How do we ensure decentralized systems serve communities rather than concentrating power? This talk will last approximately 15 to 20 minutes followed by Q&A discussion for the rest of the time. Joshua Davila https://events.ccc.de/congress/2025/hub/event/detail/solidarity-finance-on-p2p-rails https://pretalx.riat.at/39c3/talk/9HTCKF/ false 2025-12-30T14:00:00+01:00 14:00 00:30 CDC Triangle 39c3-whos-afraid-of-anonymity-a-philosophical-and-polit en Talk Online anonymity is being demonized and undermined. But anonymity has an important social function for preserving individuals and group against social threats. We will argue for the philosophical and political value of being anonymous, especially against the rising state of capture in state and corporate surveillance. Anonymity is more than namelessness: it's a tool of resistance. Casey Ford https://events.ccc.de/congress/2025/hub/event/detail/whos-afraid-of-anonymity-a-philosophical-and-polit https://pretalx.riat.at/39c3/talk/NBWHGM/ false 2025-12-30T14:30:00+01:00 14:30 00:30 CDC Triangle 39c3-mutual-vend-decentralized-coop-vending-machine en Talk Mutual-vend.com - smallest self contained coop decentrally owned and operated infra Come learn about how digital ledgers and peer to peer vending machines challenge existing labor rights, profit margins , and finance legalities! Ron Turetzky https://events.ccc.de/congress/2025/hub/event/detail/mutual-vend-decentralized-coop-vending-machine https://pretalx.riat.at/39c3/talk/V9CPMV/ false 2025-12-30T15:00:00+01:00 15:00 00:30 CDC Triangle 39c3-building-the-next-web en Talk Looking at how decentralized social networks, AI, XR, blockchain, and other technologies come together to shape the next stages of web evolution. Let’s figure out - what are the ingredients of the web evolution we all actually want? First - we look into the evolution we’ve had until now - in Decentralized communication, AI, XR, Bitcoin, & other forefront technologies that shape the internet as we know it. Then - we brainstorm - What are potential outcomes of our best & worst decisions there? They will shape how we build the next web. Ryta https://events.ccc.de/congress/2025/hub/event/detail/building-the-next-web https://pretalx.riat.at/39c3/talk/ZJBBSC/ false 2025-12-30T15:30:00+01:00 15:30 00:30 CDC Triangle 39c3-offworld-voyage-39c3-astronaut-collectives-are-bea en Talk ++ ++ ++ ++ ++ ++ ++ ++ The closing presentation at the Critical Decentralization Cluster assembly during 39C3 is a progress report on Offworld Voyage, a Space Analog Research project dedicated to the design of environmentally sustainable interplanetary exploration training habitats that also solve for adaptation to climate biodevastation on Earth. The talk will focus on some of the various ways in which Free/Libre Open Source technologies are incorporated into the project - with a strong focus on the development of decentralized and distributed coordination systems for autonomous and collective action - and how creative technologists can plug in and participate in the project. As a special show-and-tell treat Scott Beibin and Elizabeth Jane Cole, founders of Offworld Voyage will display the new pressurized training spacesuit prototypes they recently commissioned Smith Exploration Garments to build for the project. See you there! https://pretalx.riat.at/media/39c3/submissions/9KZ3CB/Offworld_Voyage_Ecotopias_5YLA5oj.png Scott Beibin Elizabeth Jane Cole https://events.ccc.de/congress/2025/hub/event/detail/offworld-voyage-39c3-astronaut-collectives-are-bea https://pretalx.riat.at/39c3/talk/9KZ3CB/ false 2025-12-30T11:00:00+01:00 11:00 01:00 Saal 5 39c3-whos-afraid-of-emotions-from-helplessness-to-_7zcf en other This workshop aims to equip techies and activists with some understanding to recognize and address emotional concerns in the context of digital rights. Together, let’s cultivate a flourishing community that prioritizes well-being and empowerment in the face of technology-driven challenges. Join us for an engaging and transformative workshop designed specifically for techies and digital rights activists. In an era increasingly defined by surveillance and technological risks, it's essential to address the emotional toll these challenges take on our community and beyond. During this interactive session, participants will: Reflect Together: Engage in a moment of introspection and heartfelt group discussions about the emotions surrounding surveillance, technology, and associated risks. Learn to actively listen and share your experiences in a supportive environment where your feelings are validated. Brainstorm Solutions: Explore ways our communities can provide more support to their members and be generous towards a broader audience, particularly those unfamiliar with digital rights issues. Learn how to communicate effectively about these feelings and provide alternatives and resources for those feeling overwhelmed. Experience Safe Spaces: Throughout the workshop, we will create an emotionally safe space that allows participants to experience firsthand what a supportive environment feels like. This is not just a theoretical exercise, but a practice in fostering community resilience and mutual care. Additionally, participants will receive comprehensive material to help them easily reproduce this workshop in their own communities. With these tools, you'll be empowered to extend the conversation and emotional support to others who share similar feelings about the challenges posed by technology. aline https://events.ccc.de/congress/2025/hub/event/detail/whos-afraid-of-emotions-from-helplessness-to-_7zcf false 2025-12-30T12:00:00+01:00 12:00 01:00 Saal 5 39c3-bundnis-hansaplatz-coalition-against-ai-cctv-and-d de Talk Brief presentation of the Hansaplatz Coalition Against AI Camera Surveillance. Brief presentation of the Hansaplatz Coalition Against AI Camera Surveillance and overview and history of the technical and legal means used the local city government to gentrify neighborhoods and repress and expel undesired populations. buendnis-hansaplatz@posteo.de [@buendnis_hansaplatz](https://events.ccc.de/congress/2025/hub/user/buendnis_hansaplatz) Gnitze https://events.ccc.de/congress/2025/hub/event/detail/bundnis-hansaplatz-coalition-against-ai-cctv-and-d https://fnf-39c3-pretalx.my-server.in/fnf-at-39c3-2025/talk/WQNMBQ/ https://fnf-39c3-pretalx.my-server.in/fnf-at-39c3-2025/talk/WQNMBQ/feedback/ false 2025-12-30T14:00:00+01:00 14:00 00:15 Saal 5 39c3-fur-ein-europaisches-grundrecht-auf-verschlusselun de Short talk Auf dem Bundesparteitag der Grünen habe ich den Antrag gestellt, sich für ein europäisches Grundrecht auf Verschlüsselung einzusetzen. Dieser Antrag wurde angenommen und ich will jetzt mal schauen, inwiefern dieses Thema außerhalb der Politik auf Unterstützung trifft und wie man zum Beispiel in der Zivilgesellschaft dafür Verbündete finden kann. Kai Bojens https://events.ccc.de/congress/2025/hub/event/detail/fur-ein-europaisches-grundrecht-auf-verschlusselun https://fnf-39c3-pretalx.my-server.in/fnf-at-39c3-2025/talk/JZLMKS/ https://fnf-39c3-pretalx.my-server.in/fnf-at-39c3-2025/talk/JZLMKS/feedback/ false 2025-12-30T14:30:00+01:00 14:30 01:00 Saal 5 39c3-chaos-prepping-in-case-of-communication-colla_2ssu de other Chaos prepping in case of communication collapse Was würden wir tun, wenn dies der letzte Congress wäre, wo wir in der gewohnten Art miteinander kommunizieren oder uns frei miteinander treffen könnten - wenn ein nächster Congress wegen Faschisten, Überwachung und/oder anderer Katastrophe in dieser Form nicht mehr möglich wäre? What would we do, if this would be the last congress in which we could meet freely and communicate in the known way, if a next congress somehow would not be possible this way, because of faschism, surveillance and/or other catastrophe? Ein kurzer Austausch zu Szenarien und Ansätzen, damit umzugehen. A brief exchange on scenarios and possible ways to deal with them. Sapi, Clara & Co. https://events.ccc.de/congress/2025/hub/event/detail/chaos-prepping-in-case-of-communication-colla_2ssu false 2025-12-30T10:00:00+01:00 10:00 02:00 callforart_care 39c3-careexe-has-stopped-responding_70ge de, en other **_Takes place under the round glass elevator next to Saal 3. [→ c3nav-Link ←](https://39c3.c3nav.de/l/c:0:75.55:146.79/)_** **Artist: Katharina Brunnmayr** **Genre: Roleplay** TIMES: * DAY 1: 14:00 - 16:00 * DAY 2: 16:00 - 20:00 * DAY 3: 20:00 - 22:00 * DAY 4: 10:00 - 12:00 What does the future of care look like? What technologies do we want to have available when we get old? Should it really be a care robot looking after us when we're elderly? Explore these questions with the help of a role-playing game and develop an idea for a care technology of the future! artnplay https://events.ccc.de/congress/2025/hub/event/detail/careexe-has-stopped-responding_70ge false 2025-12-30T10:00:00+01:00 10:00 01:30 Kidspace - Workshopraum 39c3-ada-und-zangemann de other Kennt ihr schon unser Kinder und Jugendbuch "Ada & Zangemann" In einer riesigen Villa hoch oben über der Stadt lebt der berühmte Erfinder Zangemann. Erwachsene wie Kinder lieben seine Erfindungen und wollen sie unbedingt haben. Doch dann geschieht etwas: Zangemann kommt in die Stadt, um seine Erfindungen wieder einmal aus der Nähe zu betrachten und – RUMMS! – ein Kind fährt ihm mit seinem Skateboard gegen das Schienbein. Wutentbrannt trifft der Erfinder eine Entscheidung und dann passieren merkwürdige Dinge ... Aber das kluge Mädchen Ada durchschaut, was vor sich geht. Gemeinsam mit ihren Freund:innen schmiedet sie einen Plan. Gerne würden wir dieses Buch mit euch, mit Kindern und Jugendlichen lesen. Im Anschluss daran wollen wir gemeinsam Postkarten und Briefe an Ada und oder Zangemann verfassen. In diesen wollen wir den Kindern und Jugendlichen die Möglichkeit geben zu reflektieren, warum technische Kontrolle wichtig ist und wie diese aussehen kann. https://events.ccc.de/congress/2025/hub/event/detail/ada-und-zangemann false 2025-12-30T12:30:00+01:00 12:30 01:30 Kidspace - Workshopraum 39c3-linux-fur-einsteigerinnen-part-3 de other Wir begeben uns auf eine Entdeckungsreise durch Linux - von der Vielfalt eines Betriebssystems. Was ist (F)OSS? Wie sieht so ein Linux aus? Was kann man damit machen? Und kann man damit auch spielen? Wir wollen Linux für Schule und Freizeit zeigen, die Vorteile von freier OpenSource Software erklären, die Vielfalt der verfügbaren Programme und Tools sowie mit dem Vorurteil aufräumen, dass man zum Spielen dann ja doch immer Windows benötigt. Der Workshop soll an drei Tagen am Beispiel des Schulsticks durch die Vielfalt des Systems führen. Part 3: Spielen mit Linux Lange hieß es, zum Spielen bräuchte man eine Konsole oder einen Windows-PC. Heute wollen wir zeigen, dass das schon länger nicht mehr so ist. Von einfachen Konsolen-Spielen bis zu komplexen Titeln auf Steam! Zielgruppe Dieser komplette Workshop ist für absolute Neulinge (Computer überhaupt und/oder Linux). Aber auch, wer schon Windows einsetzt und mal über den Tellerrand schauen will, vielleicht sogar schon einmal über einen Wechsel nachgedacht hat, sich aber (noch) nicht traut, ist herzlich willkommen! Voraussetzungen Interesse und Neugier. micu sylvia https://events.ccc.de/congress/2025/hub/event/detail/linux-fur-einsteigerinnen-part-3 false 2025-12-30T14:15:00+01:00 14:15 01:00 Kidspace - Workshopraum 39c3-sicher-durch-den-internet-dschungel-ein-interaktiv de other Tauche ein in die Welt der Cyber-Sicherheit auf spielerische und spannende Weise! Möchtest du lernen, wie du dich sicher im Internet bewegst? Dann sei dabei bei unserem Vortrag und Quiz! Worauf kannst du dich freuen? Wie du echte Webseiten von gefälschten unterscheidest Wie du manipulierte Bilder, Texte und Videos erkennst Wie du ein sicheres Passwort erstellst Und viele weitere Tipps zum Schutz im Netz! Das Highlight: Du kannst alles selbst ausprobieren und aktiv mitmachen. Warum lohnt es sich? Weil du danach besser vorbereitet bist, Online-Gefahren zu erkennen und dich sicher im Internet zu bewegen. Bitte bring ein eigenes Gerät (Handy, Tablet, Laptop etc.) mit, um am Quiz teilzunehmen. https://events.ccc.de/congress/2025/hub/event/detail/sicher-durch-den-internet-dschungel-ein-interaktiv false 2025-12-30T15:15:00+01:00 15:15 00:45 Kidspace - Workshopraum 39c3-kraftvolle-defragmentierung_kreg other The Kidspace is facing a fragmentation issue – time for a proper cleanup! Before we initiate the shutdown, let’s work together to organize the blocks, delete unnecessary data, and defragment the chaos. Join the Defragmentation taskforce, whether you're Level 1 or 99. Feel free to grab your instructions from the Orga team anytime. https://events.ccc.de/congress/2025/hub/event/detail/kraftvolle-defragmentierung_kreg false 2025-12-30T11:00:00+01:00 11:00 05:00 callforart_moorweide 39c3-der-schatz-an-der-moorweide_5agn de, en other _Starts next to the ball pit between Saal 4 and the cloakroom. [→ c3nav-Link ←](https://39c3.c3nav.de/l/c:0:179.55:184.69/)_ **Artist: Sportforum** **Genre: enigmatic and interactive audio mystery game** An enigmatic and interactive audio scavenger hunt that entices participants to leave the convention center for a while and explore the surrounding area. Our game “Der Schatz an der Moorweide” (The Treasure at Moorweide) sheds light (in the beam of a flashlight trembling with excitement and mystery) on the secrets of a historic place “at the gates of the city.” It is a story about greed, repression, and experiences of marginalization. Duration: approximately 1 hour. You can play alone or in a small group. You will need: 1. An internet-enabled cell phone with headphones. 2. A keen nose and a desire for (gentle) horror. 3. Your jacket, because you'll be going outside. ### Timetable: DAY 1: 14:00 - 22:00 DAY 2: 15:00 - 24:00 DAY 3: 15:00 - 24:00 DAY 4: 11:00 - 16:00 starting point: www.schatzandermoorweide.de Picture: Der Schatz der Moorweide ©Wanja Neite https://events.ccc.de/congress/2025/hub/https://usercontent.events.ccc.de/congress/2025/hub/usercontent/e/89a2318abdc0/moorweide_480-640-max.jpg artnplay https://events.ccc.de/congress/2025/hub/event/detail/der-schatz-an-der-moorweide_5agn false 2025-12-30T12:00:00+01:00 12:00 00:50 Bits&Bäume Workshop Area 39c3-self-restricting-software-workshop_7l3e en Workshop 50 Minutes Computer programs run with all privileges of the running user. If your user can read your emails, then so can any other program you run. However, many programs do not need most permissions and perhaps should not have them at all. This workshop demonstrates quite simple ways in which software can self-restrict itself. The focus will not be on foreign, potentially malicious software, but on hardening programs against misconduct and future security vulnerabilities. Several operating systems have developed different interfaces that restrict software beyond its normal scope. This workshop will focus on POSIX and especially OpenBSD because of its user-friendly APIs. Although other operating systems, such as Linux, will be discussed, they will not be covered in depth due to their more complicated APIs. Within the workshop part, software with known security vulnerabilities is then patched together - usually with almost a single line. Ideally, an exploit has hardly any effect afterwards, although the vulnerability is still present. This is not intended to encourage carelessness, but rather to demonstrate the development of a further safety net for software. A basic understanding of programming is required and, more importantly, an interest in the topic. You will need to bring an SSH client, for example a laptop with (almost) any operating system. The language will be either English or German, depending on who shows up. oxzi https://events.ccc.de/congress/2025/hub/event/detail/self-restricting-software-workshop_7l3e https://pretalx.freifunktag.de/39c3-bub-workshops-2025/talk/FEJDL3/ false 2025-12-30T13:00:00+01:00 13:00 00:50 Bits&Bäume Workshop Area 39c3-running-a-ngo-empowered-by-with-software-freedom en Workshop 50 Minutes Can organisations with limited resources be digitally sovereign and still provide modern services? It is not trivial, but the FSFE proves it's possible. In this workshop we want to share our story and hear from you how you are running your NGO on FreeSoftware. Since its founding more than 20 years ago, the FSFE has been pursuing this way. Right from the start, we have relied on Free Software although it sometimes meant not being able to use and offer trendy services. Also, given the limited resources, we constantly have to choose between useful features and maintainability. And still, neither is our infrastructure perfect nor is it 1:1 transferable to other organisations. But we think it's important that organisations exchange their experiences and learning, especially when it's about something as important as software freedom. You can find a deep dive of the FSFE IT infrastructure in [our news article from 2021](https://fsfe.org/news/2021/news-20211203-01.html) Tobias https://events.ccc.de/congress/2025/hub/event/detail/running-a-ngo-empowered-by-with-software-freedom https://pretalx.freifunktag.de/39c3-bub-workshops-2025/talk/KFTFX9/ false 2025-12-30T12:00:00+01:00 12:00 03:00 callforart_afzk 39c3-afzk-archiv-fur-zeitgenossische-kulturgeschic_tph2 de, en other **_Takes place in Saal Y at the proving ground assembly. [→ c3nav-Link ←](https://39c3.c3nav.de/l/provingground/)_** **Genre: Exhibition** The Archive for Contemporary Cultural History (AfZK) is conceived as an open, living network that captures everyday culture in its present form – before it disappears, is forgotten, or co-opted. It is not a closed system, but a growing, decentralized space that can emerge anywhere: In a box, on a hard drive, on a server, or in many places at once. All media formats are welcome – from audio and video to text, objects, drawings, and both digital and analog materials. * day 3 12:00 - 18:00 * day 4 12:00 - 15:00 Picture: AfZK - Archiv für Zeitgenössische Kulturgeschichte ©noja meier https://events.ccc.de/congress/2025/hub/https://usercontent.events.ccc.de/congress/2025/hub/usercontent/e/35a72623623a/2048-1536-max.jpg artnplay https://events.ccc.de/congress/2025/hub/event/detail/afzk-archiv-fur-zeitgenossische-kulturgeschic_tph2 false 2025-12-30T12:30:00+01:00 12:30 01:30 callforart 39c3-1965-60-jahre-algorithmisches-zeichnen-mit-co_n82b de, en other **_Takes place in the Foyer, between the Angel Registration Desk and the Cloakroom. [→ c3nav-Link ←](https://39c3.c3nav.de/l/c:0:217.56:176.66/)_** **Artist: Enna Gerhard** **Genre: Exhibition + Workshop** In 1965, something new happened: Artworks were on public display that were created with the help of a computer. These exhibitions of  Georg Nees, A. Michael Noll with Béla Julesz and Frieder Nake with Georg Nees took place in Stuttgart and New York. We looked into different techniques of algorithmic drawing. From hommages to our own ideas, we created several works – sixty years after the first exhibitions. You can find some of these works on the walls of the CCH. Additionally, we want to give several interactive workshops. Here, you can experiment on your own drawings and take them home. Times: * DAY 1: 15:00 - 16:30 * DAY 2: 15:30 - 17:00 * DAY 3: 16:30 - 18:00 * DAY 4: 12:30 - 14:00 artnplay https://events.ccc.de/congress/2025/hub/event/detail/1965-60-jahre-algorithmisches-zeichnen-mit-co_n82b false 2025-12-30T15:15:00+01:00 15:15 00:45 Kidspace - Hackcenter 39c3-kraftvolle-defragmentierung_xldo other The Kidspace is facing a fragmentation issue – time for a proper cleanup! Before we initiate the shutdown, let’s work together to organize the blocks, delete unnecessary data, and defragment the chaos. Join the Defragmentation taskforce, whether you're Level 1 or 99. Feel free to grab your instructions from the Orga team anytime. https://events.ccc.de/congress/2025/hub/event/detail/kraftvolle-defragmentierung_xldo false 2025-12-30T10:00:00+01:00 10:00 01:30 Hardware Hacking Area -- Rear 39c3-solder-your-very-own-iot-pusheen-cat-lamp-wit_zgns en other Solder your very own IoT Pusheen Cat Lamp with WLED! **Solder your very own IoT Pusheen Cat Lamp with WLED!** **Materials costs**: €70 **Taught by** Retia / Michael. **Workshop Itinerary**: Build the cutest IoT device on the network, and defend your home Wi-Fi! You will solder a custom PCB designed to light up and connect a Pusheen cat lamp. Once assembled, we will flash it with WLED, the industry-standard open-source software for controlling addressable LEDs. You’ll leave with a lamp you can control from your phone to display rainbows, fire effects, and notifications. It also doubles as a Wi-Fi defender, with firmware to detect and warn you of the presence of Wi-Fi jamming attacks! **Registration**: Buy a kit at the Hardware Hacking Area or website to guarantee a seat, or come by early! (And please do arrive early, regardless!) First come, first served. **Workshop Includes**: Pusheen Kit (Custom PCB & 3d printed base) https://events.ccc.de/congress/2025/hub/https://usercontent.events.ccc.de/congress/2025/hub/usercontent/e/330f67f981c7/pusheen.PNG Hoid (he/him) https://events.ccc.de/congress/2025/hub/event/detail/solder-your-very-own-iot-pusheen-cat-lamp-wit_zgns false 2025-12-30T12:00:00+01:00 12:00 02:00 Hardware Hacking Area -- Rear 39c3-cat-got-your-password-wi-fi-self-defense-for-begin en other Cat Got Your Password: Wi-Fi Self Defense For Beginners **Cat Got Your Password: Wi-Fi Self Defense For Beginners** **Materials costs**: €160 **Taught by** Retia / Nick & Kody . **Workshop Itinerary**: Cat got your password? In this class, you will use the Wi-Fi Nugget to learn how hackers attack wireless networks - and how to stop them. We will cover evil QR codes, extracting information like work and travel history from personal devices, Wi-Fi phishing attacks, and how to detect hacking tools like Wi-Fi pineapples. Most importantly, you will learn how to use the Nugget to physically "foxhunt" for suspicious Wi-Fi devices and secure your own home network against these common threats. **Registration**: Buy a kit at the Hardware Hacking Area or on the website to guarantee a seat, or come by early! (And please do arrive early, regardless!) First come, first served. **Workshop Includes**: Wi-Fi Nugget, Class Coupon, USB Cable skickar koufax https://events.ccc.de/congress/2025/hub/event/detail/cat-got-your-password-wi-fi-self-defense-for-begin false 2025-12-30T14:30:00+01:00 14:30 01:30 Hardware Hacking Area -- Rear 39c3-meshtastic-for-flipper-zero en other **Meshtastic for Flipper Zero** **Materials costs**: €140 **Taught by** Retia / Kody. **Workshop Itinerary**: Combine the power of the LoRa Nibble with the Flipper Zero! In this specialized class, we will focus on the interoperability between your LoRa node and the Flipper Zero. Learn how to use the Flipper as a controller for your mesh node, display messages, and send messages over the mesh network. **Registration**: Buy a kit at the Hardware Hacking Area or on the website to guarantee a seat, or come by early! (And please do arrive early, regardless!) First come, first served. **Note: Bring your own Flipper Zero if you have one, though class content is accessible via the Nibble screen as well.** **Workshop Includes**: New Nibble Zero (Flipper Interface Compatible) https://events.ccc.de/congress/2025/hub/https://usercontent.events.ccc.de/congress/2025/hub/usercontent/e/2ce54f172b97/signal-2025-12-23-193626.jpeg skickar https://events.ccc.de/congress/2025/hub/event/detail/meshtastic-for-flipper-zero false 2025-12-30T10:00:00+01:00 10:00 02:30 Hardware Hacking Area -- Front 39c3-surface-mount-electronics-assembly-for-terrif_v66k en, de other Surface Mount Electronics Assembly for Terrified Beginners **Surface Mount Electronics Assembly for Terrified Beginners** In this workshop, we will learn to handle the tiniest electronic components, which are used to make modern electronic devices. We will cheat the same way the electronics industry does, and learn the techniques of stencil paste printing and reflow soldering. You will learn a technique that stops your hands from shaking, so you can very very precisely place microscopic parts. We will make an electronic cat that purrs if you handle it correctly. No prior experience or knowledge of anything electronic needed. Caffeine use is not recommended immediately before. All tools are provided. Takes around 2 hours. **Materials costs**: 20€ if you want to make a board, free to observe. **Taught by** Kliment. **Workshop Itinerary**: **Registration**: Sign up on the paper sheet at the Hardware Hacking Area. **Links**: Mitch (he/him) https://events.ccc.de/congress/2025/hub/event/detail/surface-mount-electronics-assembly-for-terrif_v66k false 2025-12-30T13:00:00+01:00 13:00 02:00 Hardware Hacking Area -- Front 39c3-make-your-own-brain-machine en other Dive into the fascinating world of neurotechnology and construct your very own Brain Machine under expert guidance! What is a **[Brain Machine](https://cornfieldelectronics.com/cfe/projects.php#brainmachine)**? It's a fascinating device that generates light and sound pulses at brainwave frequencies. These can help achieve various states of consciousness, such as meditation or improved sleep. In this workshop for **total beginners** we will all make a **[Brain Machine](https://cornfieldelectronics.com/cfe/projects.php#brainmachine)** that is preprogrammed with a really nice meditation sequence. As well as a device that can help you relax and meditate, a nice bonus is that everyone hallucinates beautiful colors and patterns along the way. The Brain Machine is totally [open hardware](https://github.com/maltman23/Brain_Machine_kit), and created to be hackable, so you can re-program it with any computer, with software that is free to download and use. This workshop is for **total beginners** to learn to solder. For ages 10 - 100. **Materials costs**: The workshop is free, but if you would like to partake in the hands-on aspects of the workshop, Mitch will have Brain Machine kits for **€25**. **Taught by** [Mitch Altman](http://en.wikipedia.org/wiki/Mitch_Altman). _**Optional**: Bring your laptop if you want to go home with the free Arduino software installed on it. Arduino software runs on Windows, MacOS and Linux._ _**IMPORTANT NOTE:** The Brain Machine uses blinking lights, and is not recommended for people who are photosensitive._ **Workshop Itinerary**: * Intro to Sound & Light Machines * Learn to solder. Don't let this scare you! I've taught tens of thousands of people to solder, most of whom have never made anything before in their lives. It is actually a very easy skill to learn. It is also very useful. * How to re-program your Brain Machine for creating other brainwave sequences **Registration**: Buy a kit at the Hardware Hacking Area to guarantee a seat, or come by early! (And please do arrive early, regardless!) First come, first served. **Links**: [Brain Machine kit webpage](https://cornfieldelectronics.com/cfe/projects.php#brainmachine) [Ardiuno software download](https://www.arduino.cc/en/software/) [Brain Machine Github page](https://github.com/maltman23/Brain_Machine_kit) https://events.ccc.de/congress/2025/hub/https://usercontent.events.ccc.de/congress/2025/hub/usercontent/e/2e65d39431e6/BrainMachineKids.jpg Mitch (he/him) https://events.ccc.de/congress/2025/hub/event/detail/make-your-own-brain-machine false 2025-12-30T10:00:00+01:00 10:00 02:30 Hardware Hacking Area -- Front-middle 39c3-39c3-led-badge-smd-for-beginners-day-4 en other **39C3 LED badge -- SMD for Beginners** https://github.com/hackwinkel/39C3LEDbadge The 39C3 LED badge contains 42 LEDs that blink under control of of a pre-programmed 4 cent microcontroller. When the badge is alone, the LEDs will blink randomly. When it is among friends (when there are other badges nearby), it will display a chaser pattern. In this workshop you will learn how to solder Surface Mounted Devices using a normal soldering iron. Suitable for beginners. Under 16s only with responsible adult supervision. ### 39C3 LED badge -- SMD for Beginners  Surface Mounted Devices (SMDs) are small compared to Through Hole (TH) electronic components, and have the reputation of being difficult to work with as a hobyist: Difficult to see and handle, when you sneeze, you loose them and you can not easily use them on 2.54mm raster prototyping boards. SMD components are designed to be used in a reflow soldering process where tiny dots of solder paste are applied to a Printed Circuit Board (PCB), after which the SMD components are "Picked and Placed" on the PCB, after which the whole PCB is heated to the melting point of the solder ("reflowing"), actually completing the electrical connections. This workshop is aimed at showing you that the reputation of being difficult to work with is a bit undeserved, and that you can also work with SMDs using just a regular soldering iron: With some simple tricks and a suitable selection of components (not the smallest possible), the vast majority of people can successfully complete this project. Being able to solder SMD projects using just a simple soldering iron will also help you develop some skills that are useful if you need to do "rework" on reflow soldering projects. Reflow soldering is also not difficult to do as a hobbyist, but requires a few more tools like a stencil to apply solder paste and either an oven or a hot plate to do the reflowing. It is, however, much quicker than soldering the parts one by one, and can yield more professional looking, cleaner, solder joints. The project is an electronic name-badge - You should write your name (or nick) on it and wear it. It contains 42 LEDs, a microcontroller, some support components and an InfraRed transmitter and receiver that allow it to communicate with other badges. When the badge detects the presence of other badges ("friends") nearby, it will change its behaviour. It will not only interact with other 39C3 LED badges, but also with TBD badges - come visit the TBD assembly at komona or https://tbd.camp  ### Costs This workshop is donation based. Materials costs are 2 euro per badge. Donations will go towards 1) covering costs of the badges, 2) covering costs of running the hardware hacking area in general, 3) covering costs of organizing TBD (see the TBD assembly at komona or https://tbd.camp) ### Registration The number of participants per session is limited. First come, first served. Either get a participation voucher beforehand or show up early (there may be places left). There will be *numbered* paper vouchers available for each session some time in advance of each session. If you get a voucher and do not show up *before* the designated starting time, someone else may take your spot. Please don't take multiple vouchers and don't take vouchers if you don't actually plan to participate. ### Getting a kit Kits are part of the workshop and not for sale separately. You can, however easily source your own PCBs and parts and make kits yourself because the design is MIT licensed open source. ### Links https://github.com/hackwinkel/39C3LEDbadge Mitch (he/him) the0 (he his him) https://events.ccc.de/congress/2025/hub/event/detail/39c3-led-badge-smd-for-beginners-day-4 false 2025-12-30T13:00:00+01:00 13:00 02:30 Hardware Hacking Area -- Front-middle 39c3-blocktris-game-soldering-workshop-not-for-beg_y9j7 en other Blocktris game soldering workshop (not for beginners) https://github.com/hackwinkel/10x20_LED_screen **Blocktris game soldering workshop (not for beginners)** **Materials costs**: €8 **Taught by** Theo. **Workshop Itinerary**: **Registration**: Get a reservation voucher at the Hardware Hacking Area to guarantee a seat, or come by early! (And please do arrive early, regardless!) First come, first served. **Links**: https://github.com/hackwinkel/10x20_LED_screen Mitch (he/him) https://events.ccc.de/congress/2025/hub/event/detail/blocktris-game-soldering-workshop-not-for-beg_y9j7 false 2025-12-30T11:00:00+01:00 11:00 02:00 somewhere in the house of tea 39c3-dissoziative-ressourcen-teilen-eine-dis-kussion de other Dies ist ein Meet-up für dissoziative, plurale Systeme* (oder Wesen die questioning sind). Das Meetup ist hauptsächlich dafür da um einen Austausch herzustellen, Erfahrungen zu Teilen und sich weniger allein zu fühlen. this meet-up is in German, please be advised. This is a meet-up for dissociative, plural Systems* (or creatures who are questioning themself). The meetup exists mainly as an exchange of experiences, and for mutual support. Please only attend if you are well rested, have eaten something and are hydrated and other basic needs of your body are met! The meet-up will be moderated, there will be speaking-rules and support available. **System, DID, Plurality, etc. are equally welcome, no one will be pathologiesed or forced to use different language.* Amy (she/her) Luxis https://events.ccc.de/congress/2025/hub/event/detail/dissoziative-ressourcen-teilen-eine-dis-kussion false 2025-12-30T14:00:00+01:00 14:00 01:00 somewhere in the house of tea 39c3-cultural-resistance-creating-space-for-palest_1ne3 en other Come and join us for a sharing session - we will tell you about our experience of organising cultural resistance in support of Palestine in Leipzig, and we are eager to hear from you. We are members of Artists for Cultural Freedom Leipzig. We formed after the Euro-Scene festival succumbed to pressure from Leipzig Stadt and the Sächsisches Staatsministerium für Wissenschaft, Kultur und Tourismus to cancel a theater performance by Palestinian artist Ahmed Tobasi in 2024. Our community organised to bring the performance to Leipzig and stage it independently in 2025. https://www.tagesschau.de/inland/regional/sachsen/mdr-umstrittene-palaestinensische-theater-performance-kommt-in-leipzig-auf-die-buehne-100.html Bring your experiences to share! We will talk about how we organise, how we keep the scope of our activities manageable, and how small wins keep us going, then hand over to you. Tell us about your community, your events, your achievements and your plans for fighting censorship and exclusion. Depending how many people come, we may split into smaller groups for ease of communication. scharmander https://events.ccc.de/congress/2025/hub/event/detail/cultural-resistance-creating-space-for-palest_1ne3 false 2025-12-30T11:30:00+01:00 11:30 01:30 Call for Art: Workshopspace 1 39c3-post-platform-digital-publishing_7bxs other Workshop mit Well Gedacht Publishing TAG 1: 20:30 - 22:00 TAG 2: 20:00 - 21:30 TAG 4: 11:30 - 13:00 In this workshop, we will engage with digital publishing methods that operate independently of big tech platforms and products. We will build our own RSS files for personal websites, blogs and discuss pirate publishing forms, both online and offline. We will present the idea of the PPDP-PRINTER, a DIY device currently under development that combines web2print scripts with a simple server and local online publishing/broadcasting capabilities. The printer converts files, prints via its dot-matrix printer, creates RSS feeds, and serves them online. Our aim with the PPDP-PRINTER is to create an all-in-one material manifestation of our resource collection Post-Platform Digital Publishing Toolkit Link: [https://publishing.wellgedacht.com/](https://publishing.wellgedacht.com/) mastodon: [@wellgedachtpublishing@post.lurk.org](https://post.lurk.org/@wellgedachtpublishing) https://events.ccc.de/congress/2025/hub/https://usercontent.events.ccc.de/congress/2025/hub/usercontent/e/c9e05af6e79c/Post-Platform_Digital_Publishing_Fadi_Houmani.jpeg Martha https://events.ccc.de/congress/2025/hub/event/detail/post-platform-digital-publishing_7bxs false 2025-12-30T14:00:00+01:00 14:00 01:00 Call for Art: Workshopspace 1 39c3-empower-your-non-tech-community_bhjv other Workshop with Anna Maria DAY 2: 12:00 - 13:00 DAY 4: 14:00 - 15:00 Starting from the assumption that, as those privileged with knowledge and experience in technology, we are obliged to share it with people who don’t have such competencies. Strengthening non-tech communities is essential for our collective well-being. What is the minimum level of tech education that everyone engaged in class struggle should acquire? Do we have the tools to protect non-tech people in our environment beyond the hackerspaces communities? How to build horizontal safe-spaces, secure infrastructures to educate others and which tools and techniques are the most effective for education? Let's have a discussion and create ready to use solutions. Link: [https://sanma.cargo.site/](https://sanma.cargo.site/) https://events.ccc.de/congress/2025/hub/event/detail/empower-your-non-tech-community_bhjv false 2025-12-30T12:00:00+01:00 12:00 00:15 Jugend hackt Wohnzimmerbühne 39c3-long-term-support-bei-jugend-hackt-infos_pa52 de Talk Bist du 14-21 Jahre alt und träumst davon, mit anderen ein größeres Projekt umzusetzen? Mit dem [Jugend hackt Long Term Support](https://jugendhackt.org/lts/) bekommst du 1 Jahr lang alle Unterstützung, die du brauchst, von Mentoring bis Materialkosten. In dieser Session gibt es Infos & Vernetzungsmöglichkeiten dazu. **Teil 1 (15min): Infos zum Long Term Support - diese Session** Ihr erfahrt alles zum [Jugend hackt Long Term Support](https://jugendhackt.org/lts/) für junge Projektgruppen im Alter von 14-21 Jahren: Jugend hackt unterstützt eure Projektideen nicht nur mit 3 Tagen Hackathon, sondern mit 365 Tagen Projektsupport. Der Long Term Support bietet Wochenenden mit der Projektgruppe, Beratung durch erfahrene Mentor\*innen, hilfreichen Input, spannende Workshops - und die Möglichkeit, Projektergebnisse auf dem Congress 2026 und dem Chaos Communication Camp 2027 zu präsentieren! **Teil 2 (45min): Vernetzung und Brainstorming für Projektideen - Session im Anschluss** Im Anschluss besteht die Möglichkeit für Interessierte, sich gleich mit anderen Junghacker\*innen, Aktivist\*innen, Ideenversprüher\*innen, verplanten Bastler\*innen und krass organisierten Planer\*innen zu vernetzen und eine Projektidee auf die Beine zu stellen. Denn Projektgruppen können sich noch bis zum 11.01.2026 mit ihren Projektideen für eine bessere Welt bewerben: [Hier geht es zur Anmeldung](https://anmeldung.alpaka.space/berlin/lts/). https://pretalx.chaos.jetzt/media/jugend/submissions/KMZPKV/LTS-Rakete_F8A8PNL_6tfgzAU.png eliah https://events.ccc.de/congress/2025/hub/event/detail/long-term-support-bei-jugend-hackt-infos_pa52 https://pretalx.chaos.jetzt/jugend/talk/KMZPKV/ https://pretalx.chaos.jetzt/jugend/talk/KMZPKV/feedback/ false 2025-12-30T15:15:00+01:00 15:15 00:45 Kidspace - Affenfelsen 39c3-kraftvolle-defragmentierung_l3vw other The Kidspace is facing a fragmentation issue – time for a proper cleanup! Before we initiate the shutdown, let’s work together to organize the blocks, delete unnecessary data, and defragment the chaos. Join the Defragmentation taskforce, whether you're Level 1 or 99. Feel free to grab your instructions from the Orga team anytime. https://events.ccc.de/congress/2025/hub/event/detail/kraftvolle-defragmentierung_l3vw false 2025-12-30T13:00:00+01:00 13:00 00:30 CADUS Skill-Station 39c3-daily-tech-talk-cadus-academy-building-an-ope_4xuj de, en other Jeden Tag geben wir einen kurzen Einblick in den Aufbau der CADUS Academy: unserer offenen Lernplattform für medizinische, technische und psychosoziale Trainings. Wir zeigen, wo wir gerade stehen, welche Ideen wir verfolgen und wie die Community sich einbringen kann. Fragen, Feedback und spontaner Austausch ausdrücklich willkommen. Each day, we’ll give a short insight into the development of the CADUS Academy: our open learning platform for medical, technical, and psychosocial training. We’ll share where the project currently stands, the ideas shaping it, and how the community can get involved. Questions, feedback, and spontaneous discussions are warmly welcome. https://events.ccc.de/congress/2025/hub/event/detail/daily-tech-talk-cadus-academy-building-an-ope_4xuj false 2025-12-30T14:00:00+01:00 14:00 01:00 CADUS Skill-Station 39c3-carry-you-carry-me-leute-tragen_psp2 de, en other Ein Crashkurs, in dem wir praktisch ausprobieren, wie man am Besten eine Person trägt, die nicht mehr selbst mobil ist. Ob verletzt, bewusstlos oder einfach nur betrunken - es schadet nie zu wissen, wie man in brenzligen Situationen nicht nur Verantwortung, sondern auch einen Körper trägt. Piggyback is obvious, but what if the person you have to carry is unconscious? Or cannot move their arm? What should you pay attention to when carrying a person with two people? Or if the person also needs medical attention at the same time? How can items such as a triangular bandage, table, or backpack be used? How can you protect your own back while carrying? With a little technique and the right moves, you can even carry persons that were heavier than you - we'll try everything out. https://events.ccc.de/congress/2025/hub/event/detail/carry-you-carry-me-leute-tragen_psp2 false 2025-12-30T10:45:00+01:00 10:45 00:30 Free Knowledge Habitat 39c3-wikidata-introduction_7xy7 en Talk An introduction to Wikidata, the free knowledge base. Wikidata is a sister project of Wikipedia, Wikimedia Commons and other Wikimedia projects to collect and publish Linked Open Data (LOD). Here yo ucan find out what that means and how you can edit and reuse the data. Lucas Werkmeister https://events.ccc.de/congress/2025/hub/event/detail/wikidata-introduction_7xy7 https://pretalx.wikimedia.de/39c3-2025/talk/YLBHLH/ false 2025-12-30T11:30:00+01:00 11:30 01:00 Free Knowledge Habitat 39c3-transitous-meetup en Workshop This is a meetup for people interested in the Transitous project, including but not limited to users, developers and contributors. Transitous [ˈtɹæn.sɪʃəs] is a community-run provider-neutral international public transport routing service. Using openly available data and a FOSS routing engine we operate a free to use routing service that does not stop at borders. Julius Tens Volker Krause Jonah Brüchert https://events.ccc.de/congress/2025/hub/event/detail/transitous-meetup https://pretalx.wikimedia.de/39c3-2025/talk/JJFRAW/ false 2025-12-30T13:00:00+01:00 13:00 00:30 Free Knowledge Habitat 39c3-a-whirlwind-tour-through-the-land-of-wikidata-powe en Talk In this presentation, we’ll take a quick look at lots of different applications that use Wikidata data. Wikidata's data is used in thousands of projects and often we don't realize what our work makes possible. In this session we will take a tour through some of the great applications and services that have been built on top of Wikidata's data. Join us for a wild ride! Lucas Werkmeister https://events.ccc.de/congress/2025/hub/event/detail/a-whirlwind-tour-through-the-land-of-wikidata-powe https://pretalx.wikimedia.de/39c3-2025/talk/NXTPWQ/ false 2025-12-30T13:40:00+01:00 13:40 01:00 Free Knowledge Habitat 39c3-federating-knowledge-exploring-ways-to-bridge-wiki en Workshop Most people and organizations have their very own way of acquiring, organizing, archiving, sharing, and collaborating on knowledge repositories. A broad spectrum of opinions and approaches resulted in a diverse and rich ecosystem of knowledge management solutions. Nevertheless, this also implies scattered and disconnected knowledge sources. What would it mean to build bridges among wikis and federate knowledge? Update: [collective notes from the workshop](https://pad.xpub.nl/p/federated-knowledge-39c3) (editable link). This workshop is going to be heavily centred on a twofold discussion, exploring the challenge of federated knowledge starting from two questions. - What does it mean to *federate* knowledge repositories? - Instead of pursuing a silver-bullet solution to embrace all use-cases, what would it mean to foster and enable interoperability for different software? These questions stem from years of questioning and wondering how to integrate my personal note-taking and collective, participatory knowledge management at work, in organizations, institutions, and informal collectives. Recently, I began actively researching this topic as I started playing with the [MediaWiki API](https://www.mediawiki.org/wiki/API) to cross-synchronize my local Markdown notes and the [XPUB wiki](https://pzwiki.wdka.nl/mediadesign/), the public learning wiki of the [Experimental Publishing](https://xpub.nl) master. I am puzzled by taking advantage of the potential of a specific software (in this case, MediaWiki) while fearing of being locked-in. Some further, more specific, insights and questions: - Local-first approaches and software (e.g. [Reflection](https://github.com/p2panda/reflection)) - Interesting experiments based on existing protocols, such as [Ibis](https://ibis.wiki) - What do we take of semi-open and obscure yet very cool initiatives like [Anytype](https://anytype.io) - The power and the limits of plain-text: how to enable collaboration on simple Markdown files and build on top of it, as [Obsidian](https://obsidian.md) does Tommi https://events.ccc.de/congress/2025/hub/event/detail/federating-knowledge-exploring-ways-to-bridge-wiki https://pretalx.wikimedia.de/39c3-2025/talk/GKNLVZ/ false 2025-12-30T14:45:00+01:00 14:45 00:30 Free Knowledge Habitat 39c3-collaboration-architecture-because-whatsapp-groups en Talk WhatsApp groups have become the default tool for coordinating anything. Also, WhatsApp groups are terrible. We all have stories. From an architectural point of view, they are terrible because the least configurable platform. There is a 1 and a 0 - you are a member of a group and get every message, or you are not a member and get no message. We used to have tools that worked better. Every forum built on free forum software would work better. The problem is - everyone who hears "we should organise" immediately imagines a WhatsApp group. There is knowledge out there about how to build tools and help people organise through them - but we have no language. I am proposing Collaboration Architecture. What do we think? Anke Holst https://events.ccc.de/congress/2025/hub/event/detail/collaboration-architecture-because-whatsapp-groups https://pretalx.wikimedia.de/39c3-2025/talk/J8XXEX/ false 2025-12-30T11:00:00+01:00 11:00 00:50 Bits&Bäume Living Room 39c3-wie-spielt-man-eigentlich-bridge_dyea de Meetup 50 Minutes Was haben Buster Keaton, Omar Sharif, Winston Churchill und Mahatma Gandhi gemeinsam? Sie alle waren leidenschaftliche Bridgespieler. Tauche mit uns in diesem Crashkurs ein in die faszinierende Welt des bekanntesten Stich-Kartenspiels der Welt. Denn Bridge ist nicht nur das "Spiel der alten Damen in englischen Filmen" sondern bietet jede Menge Möglichkeiten zu knobeln, ständig neues zu lernen, für Teamwork und ausgefeilte, analoge Kommunikationssysteme. Ihr lernt bei uns die Grundregeln des Spiels und könnt euch direkt selbst am Problemlösen probieren. Wir haben ein paar Karten dabei, wenn ihr aber selbst Spielkarten (Französisches Blatt, 52 Karten) habt, bringt gerne welche mit. Jasmin (she/her) und Luisa (she/her) https://events.ccc.de/congress/2025/hub/event/detail/wie-spielt-man-eigentlich-bridge_dyea https://pretalx.freifunktag.de/39c3-bub-workshops-2025/talk/Z7GBCX/ false 2025-12-30T12:00:00+01:00 12:00 00:50 Bits&Bäume Living Room 39c3-fsfe-meetup-at-bits-baume-habitat de Workshop 50 Minutes You are a FSFE volunteer or you would like to know more about the Free Software Foundation Europe? Then this is the place to be. We will be discussing current activities, future activities, and what will be happening next. You are welcome to join us for some food and drinks while sharing your ideas and learning all about the FSFE and its current activities. Bonnie https://events.ccc.de/congress/2025/hub/event/detail/fsfe-meetup-at-bits-baume-habitat https://pretalx.freifunktag.de/39c3-bub-workshops-2025/talk/DEP8BQ/ false 2025-12-30T13:00:00+01:00 13:00 00:50 Bits&Bäume Living Room 39c3-global-climate-justice-digital-empowerpent-bb-comm de Meetup 50 Minutes Du bist schon Teil von Bits & Bäume oder interessierst dich Bits & Bäume kennen zu lernen? Komm beim Tägliches Meetup zum Austausch und Vernetzen zu Themen globaler Gerechtigkeit und Digitaler Selbstbestimmtheit. Du bist schon Teil von Bits & Bäume oder interessierst dich Bits & Bäume kennen zu lernen? Komm beim Tägliches Meetup zum Austausch und Vernetzen zu Themen globaler Gerechtigkeit und Digitaler Selbstbestimmtheit. https://pretalx.freifunktag.de/media/39c3-bub-workshops-2025/submissions/J3LDUW/38c3-wohnzimmer-lounge_7esOGzQ.jpg benks https://events.ccc.de/congress/2025/hub/event/detail/global-climate-justice-digital-empowerpent-bb-comm https://pretalx.freifunktag.de/39c3-bub-workshops-2025/talk/J3LDUW/ false 2025-12-30T12:00:00+01:00 12:00 00:15 SegFaultDragons Assembly 39c3-soldering-competition-prize-awards de, en other Prizes will be given to the winners of the competition. Please show up on time. https://events.ccc.de/congress/2025/hub/event/detail/soldering-competition-prize-awards false 2025-12-30T10:30:00+01:00 10:30 01:30 cyber4EDU und Datenschutzheinis Assembly (c4E-Roundtable) 39c3-workshop-luanti-minetest-weltenbauer de other Lasst uns gemeinsam eine Welt nach euren Vorstellungen bauen! In dem Workshop werden wir gemeinsam eine Welt nach euren Vorstellungen bauen. Dazu nutzen wir natürlich die freie Minecraft-Alternative Luanti (ehemals Minetest). An dem Projekt kann nach dem Workshop gerne von euch weitergearbeitet werden - die Welt wird weiter bestehen :) Wir haben ein paar Laptops vor Ort, eigene Laptops sollten bitte den aktuellen Luanti-Client installiert haben. Alter: 8-16 Jahre; max 8 Teilnehmende pnrd https://events.ccc.de/congress/2025/hub/event/detail/workshop-luanti-minetest-weltenbauer false 2025-12-30T14:00:00+01:00 14:00 01:30 cyber4EDU und Datenschutzheinis Assembly (c4E-Roundtable) 39c3-disclosure-at-dpa de, en other Come and disclose your privacy related holes to your nearest DPA. I will take your inquiry so you don't have to provide the information over the website or per mail. I can also show you where is the best place to disclose. Either I can take it or forward it to the next best DPA. w1ntermute https://events.ccc.de/congress/2025/hub/event/detail/disclosure-at-dpa false 2025-12-30T11:00:00+01:00 11:00 01:00 Kidspace - Basteltische 39c3-collage de other Alle Informationen findest du hier: https://events.ccc.de/congress/2025/hub/de/event/detail/deri-vative Deri-vative https://events.ccc.de/congress/2025/hub/event/detail/collage false 2025-12-30T13:00:00+01:00 13:00 01:30 Kidspace - Basteltische 39c3-nerds-spielen-spiele-tag-4 de, en other Nerds spielen Spiele Du hast gerade nichts zu tun, brauchst eine kleine Entspannungszeit oder suchst einfach ein wenig Spaß mit anderen? Spiel doch einfach mit! Jeder ist willkommen! Denn was tun Nerds, wenn sie gerade nichts hacken? Sie spielen Spiele! monsterchen https://events.ccc.de/congress/2025/hub/event/detail/nerds-spielen-spiele-tag-4 false 2025-12-30T15:15:00+01:00 15:15 00:45 Kidspace - Basteltische 39c3-kraftvolle-defragmentierung_jl56 other The Kidspace is facing a fragmentation issue – time for a proper cleanup! Before we initiate the shutdown, let’s work together to organize the blocks, delete unnecessary data, and defragment the chaos. Join the Defragmentation taskforce, whether you're Level 1 or 99. Feel free to grab your instructions from the Orga team anytime. https://events.ccc.de/congress/2025/hub/event/detail/kraftvolle-defragmentierung_jl56 false 2025-12-30T12:12:00+01:00 12:12 00:45 Fediverse shared table 39c3-am-arsch-des-fedeiversesat-the-bottom-of-the-fedei de, en other Fazit: Die Kombination von AT-Protokoll und ActivityPub würde also dazu beitragen, dass dezentralisierte soziale Netzwerke effizienter, interoperabler und zukunftssicherer werden. Sie würden sich gegenseitig stärken und die Technologie und Nutzerbasis auf lange Sicht erweitern. Falls du noch tiefer in ein technisches Detail einsteigen möchtest oder eine konkrete Frage zu den Unterschieden zwischen den beiden Protokollen hast, lass es uns wissen! 👉 Me (ChatGPT) I am here with you in conversation. You ask → I answer. I don't connect networks, I don't distribute posts, I'm not part of Bluesky or Mastodon. 👉 ActivityPub This is the protocol that Mastodon servers use to communicate with each other, for example. Like radios between servers. No app, no opinion, no thinking. 👉 AT Protocol (Bluesky) Also a protocol, but more modern in its thinking. Identity, content and algorithms are separate. Bluesky is just an app on top of it. https://events.ccc.de/congress/2025/hub/https://usercontent.events.ccc.de/congress/2025/hub/usercontent/e/9cbecf751c9a/paintintheass_02_946.jpg poo https://events.ccc.de/congress/2025/hub/event/detail/am-arsch-des-fedeiversesat-the-bottom-of-the-fedei false 2025-12-30T11:00:00+01:00 11:00 00:30 ShapeIt 39c3-shapeit-open-source-3d-modeller_t00i de, en other Let me introduce you to ShapeIt — an open-source CAD application developed by me, Gerhard. Let me introduce you to ShapeIt — an open-source CAD application developed by me, Gerhard. Are you interested in getting involved? Feel free to join us! Whether you simply want to try out ShapeIt or actively contribute to its development, you are very welcome. Current areas of work include platform independence, user experience testing, the plugin interface, STL reverse engineering, and SVG import. https://github.com/FriendsOfCADability/CADability Note: This workshop is held by Gerhard, who has no Hub-account. Not by langfingaz ;) https://events.ccc.de/congress/2025/hub/https://usercontent.events.ccc.de/congress/2025/hub/usercontent/e/cda49a1918f0/signal-2025-12-28-183220_002_x.jpg langfingaz (he/him) https://events.ccc.de/congress/2025/hub/event/detail/shapeit-open-source-3d-modeller_t00i false 2025-12-30T14:00:00+01:00 14:00 02:00 Kidspace - Tisch vor Saal B 39c3-geschichten-erzahlen-tag-4-im-orbit-science-fictio de other Im Orbit (Science Fiction) Unser Raumschiff ist kaputt und jetzt bauen wir uns ein Neues. (Rollenspiel ohne Regelsystem, 2 Stunden, bis zu 6 Leute, auf Deutsch) Cisz (er, he) https://events.ccc.de/congress/2025/hub/event/detail/geschichten-erzahlen-tag-4-im-orbit-science-fictio false 2025-12-30T11:00:00+01:00 11:00 04:10 Kidspace - Elektrotisch 39c3-elektrobausteine-tag-4 de, en other Elektrobausteine/Electric circuits with building blocks Make light sound or mechanical circuits. The electronic building blocks from OEM Dbolo are not only especially child-friendly due to their simple push-button connections but also a lot of fun for all ages. They are distributed by various brands, including "Kosmos Easy" and "Elenco Snap Circuits." No prior knowledge of electricity is required, but beware - learning something might happen! This is an open parent-child activity. Learn, build, and play together, and take care for arguments and that the parts don’t fall on the floor. Teenagers and adults are also welcome without child accompaniment. ;-) https://events.ccc.de/congress/2025/hub/event/detail/elektrobausteine-tag-4 false 2025-12-30T15:15:00+01:00 15:15 00:45 Kidspace - Elektrotisch 39c3-kraftvolle-defragmentierung_u554 other The Kidspace is facing a fragmentation issue – time for a proper cleanup! Before we initiate the shutdown, let’s work together to organize the blocks, delete unnecessary data, and defragment the chaos. Join the Defragmentation taskforce, whether you're Level 1 or 99. Feel free to grab your instructions from the Orga team anytime. https://events.ccc.de/congress/2025/hub/event/detail/kraftvolle-defragmentierung_u554 false 2025-12-30T13:30:00+01:00 13:30 00:30 FNF Assembly 39c3-fedi-stories-inforout-eu-public-admin-adult-versio en Short talk Content warning! Expect a rather ‘erotic’ reading of stories based on extracts of our research, brewed by a quirky mind. This is a reading of some red-tape-diary stories, based on FediVariety’s deep package inspection on the EDPS’s ‘EU Voice/Video’ pilot project—but with a juicy twist! Every character is real, each event actually happened, and all quotes are genuine. However, all of this will be ridiculously tweaked. Views are very personal, none of the involved (EU) organisations or individuals accept any liability for damage of any kind resulting from the risks inherent in the erotic transmission of messages. — About the speaker (Cpt.) ZZEPPOSS’s lifelong passion for technology was ignited by a childhood fascination with screwdrivers, electro-mechanical pinball machines, klunker bikes, the treasures found in his dad’s workshop… and garbage dumpsites. This fervent enthusiasm puzzled his parents and teachers for years, as it continues to baffle his colleagues, compatriots, and friends to this day. ‘Stay Hungry. Stay Foolish.' is his leitmotif (cfr. WEC). ZZEPPOSS https://events.ccc.de/congress/2025/hub/event/detail/fedi-stories-inforout-eu-public-admin-adult-versio https://fnf-39c3-pretalx.my-server.in/fnf-at-39c3-2025/talk/FWXGKD/ https://fnf-39c3-pretalx.my-server.in/fnf-at-39c3-2025/talk/FWXGKD/feedback/ false 2025-12-30T12:30:00+01:00 12:30 00:45 Sendezentrum Podcast-Tisch 39c3-nebelhorn de Podcast-Tisch Wir sind vom Nebelhorn Podcast der Scientists for Future in Hamburg und führen in unregelmäßigen Abständen Interviews, meist zu Klima und Gesellschaft. Je nach Gelegenheit werden wir auf dem 39c3 ein kleines Interview oder eine Hinter-den-Kulissen Sonderfolge aufnehmen. https://nebelhorn.podigee.io/ https://pretalx.c3voc.de/media/39c3-sendezentrum/submissions/HZVYUY/c8fb2956-28e5-470e-827f-4e_KGUOA6x.webp Pascal4F https://events.ccc.de/congress/2025/hub/event/detail/nebelhorn https://pretalx.c3voc.de/39c3-sendezentrum/talk/HZVYUY/ https://pretalx.c3voc.de/39c3-sendezentrum/talk/HZVYUY/feedback/ false 2025-12-30T13:30:00+01:00 13:30 00:45 Sendezentrum Podcast-Tisch 39c3-die-sicherheits_lucke-live-vom-39c3-recap de Podcast-Tisch Die **Sicherheits_lücke** (https://sicherheitsluecke.fm) greift aktuelle Ereignisse und Trends der Cybersecurity auf. Im Podcast werden die Themen - gerne auch mal humoristisch, sarkastisch oder selbstironisch - von Volker Skwarek, Monina Schwarz und Ingo Timm mit Tiefgang aufbereitet. Mit dem Format **live** ist der Podcast auch regelmäßig auf Kongressen zu finden und diskutiert interessante Vorträge mit ausgewählten Gästen. Wir, Monina Schwarz und Volker Skwarek, fassen unsere Eindrücke vom 39c3 zusammen. Gemeinsam sprechen wir über zivilgesellschaftliche und technische Trends sowie Hacks und Bedrohungen über die wir Neues an den letzten 4 Tagen gelernt haben. https://pretalx.c3voc.de/media/39c3-sendezentrum/submissions/AW9WFN/HOOU_Cover-Sicherheitsluec_gVi5ZWv.webp Volker https://events.ccc.de/congress/2025/hub/event/detail/die-sicherheits_lucke-live-vom-39c3-recap https://pretalx.c3voc.de/39c3-sendezentrum/talk/AW9WFN/ https://pretalx.c3voc.de/39c3-sendezentrum/talk/AW9WFN/feedback/ false