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Schedule

Der Hub wird spätestens Ende Januar archiviert, alle nutzerbezogenen Inhalte, Boards und auch einige Wiki-Seiten werden dabei entfernt. Alle öffentlichen Assemblies, Projekte und Veranstaltungen bleiben. // The hub will be archived by end of January. All user-provided content, boards and several wiki pages will be deleted. All public assemblies, projects and events will remain.

List
Calendar

Day 1 Day 2 Day 3 Day 4

recorded only not recorded only

Tracks

CCC & Community Hardware Security Art & Beauty Ethics, Society & Politics Science Live Performance DJ-Set Entertainment

Day 4
10:00

10:30

11:00

11:30

12:00

12:30

13:00

13:30

One

Asahi Linux - Porting Linux to Apple Silicon (en)

sven

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.

CCC&T - Cosmic ray, the Climate Catastrophe and Trains. (en)

FantasticMisterFux

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).

Ground

Atoms in Space (en)

manuel

*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.

CUII: Wie Konzerne heimlich Webseiten in Deutschland sperren (de)

Lina Lastname, Northernside

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.

Who runs the www? WSIS+20 and the future of Internet governance (en)

Sophia Longwe

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.

Zero

I Hated All The Cross-Stitch Software So I Made My Own: My Deranged Outsider Software Suite For Making Deranged Outsider Art (en)

yomimono

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.

“End Of 10”: How the FOSS Community is Combatting Software-Driven Resource and Energy Consumption (en)

Joseph P. De Veaugh-Geiss, Carolina Silva Rode, Bettina Louis

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.

Fossile Industrie liebt KI! (de)

Rike, Moritz Leiner

Der Hype um generative KI und die Gasindustrie bilden in Zeiten der Klimakrise eine bedrohliche Allianz für die Zukunft des Planeten.

Fuse

How to keep Open Source open without leaving our communities open to threats (en)

Quintessence

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.

What You Hack Is What You Mean: 35 Years of Wiring Sense into Text (en)

Torsten Roeder

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.

Laser Beams & Light Streams: Letting Hackers Go Pew Pew, Building Affordable Light-Based Hardware Security Tooling (en)

Patch, Sam. Beaumont (PANTH13R)

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.

CDC Triangle

Welcome to the last CDC day (en)

Diego Salazar

What went on and what is coming next.

NextGraph Demo: Local First, E2EE, RDF graph DB, and a Reactive ORM SDK (en)

Laurin Weger

[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.

SeedSigner DIY Bitcoin signing device build workshop (en)

freerk

Build your own open-source Bitcoin signing device with a Raspberry Pi Zero, camera and display! We have kits for 45€

Whats new in Reticulum (en)

fluorescent_beige, Liam

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.