Licensed to the public under https://creativecommons.org/licenses/by/4.0/about this event: https://c3voc.deVon melly, Lu

Licensed to the public under https://creativecommons.org/licenses/by/4.0/about this event: https://c3voc.deVon Charlotte, Anna

Licensed to the public under https://creativecommons.org/licenses/by/4.0/about this event: https://c3voc.deVon Pablo, Lennard, Simon, Mohammed, Jonathan

Licensed to the public under https://creativecommons.org/licenses/by/4.0/about this event: https://c3voc.deVon Benia, Vincent, Oskar, 404, Arya

Licensed to the public under https://creativecommons.org/licenses/by/4.0/about this event: https://c3voc.deVon Greta, Aemi, Lale, Morgan, Charlie

Licensed to the public under https://creativecommons.org/licenses/by/4.0/about this event: https://c3voc.deVon Hanl, Theodora, Paulina, Lilly, Andrii, Leonid, Jona, Matilda

Licensed to the public under https://creativecommons.org/licenses/by/4.0/about this event: https://c3voc.deVon Emil, Ferdinand, Ocey, Sarah, Alexander, Konsti, Arsenii, Gerald, Emil

Licensed to the public under https://creativecommons.org/licenses/by/4.0/about this event: https://c3voc.deVon Arnel, Angela, Ida, Lotti, Levin, Milo

Licensed to the public under https://creativecommons.org/licenses/by/4.0/about this event: https://c3voc.deVon Lennart, Maxi, Layla

Licensed to the public under https://creativecommons.org/licenses/by/4.0/about this event: https://c3voc.deVon Justus, Ilias, jim, Mikka, Helena, Maya

Licensed to the public under https://creativecommons.org/licenses/by/4.0/about this event: https://c3voc.deVon kilian, David, Bela

Projekte: FAIREDU, Bit-Flip, Simple Study, Flappy Rocket, News Map, Space Tree, Schüli Cloud, Lama Script, Daily Guide, Lautstärke messen (im Klassenzimmer), PartypakaLicensed to the public under https://creativecommons.org/licenses/by/4.0/about this event: https://c3voc.de

How does a (Go) linter work? We'll find out and write our own!A linter is an automated way of performing a code review. It automatically checks your code way faster than any human could do, and with way less environmental impact and more deterministically than an AI would use. Sure, it does not replace code review, but it allows the reviewer to foc…

At our Saarländisches Chaos-Event Mega-Knowledgecamp, we created an Innovative Digital Platform™ to have digital payments at the bar, without involving American payment acquirers and networks. This talk will present the many NFC crimes we committed to enable this.Let's admit it, dealing with cash at a bar, particularly notes with wet hands, is a bi…

Normal Advent calendars are boring: so let’s make our own! We’ll combine all our favorite technologies: Gridfinity (for the grid system), 3D printing (for the grid), vacuum molding (for the chocolate), laser cutting (for the frame), and automated paper cutting to create advent calendars that are both beautiful and functional.Along the way, we’ll co…

The many consequences of running your regional rail network like an S-BahnA transgender catgirl who knows too many things about the MDSB network infodumps to a (not) captive audience about the many issues said network has caused for the transit of the region around Leipzig and HalleLicensed to the public under https://creativecommons.org/licenses/b…

This talk by strifel will contain a short introduction to the "Robot Operating System" (2!) and what it supports.about this event: https://c3voc.deVon strifel

a small talk about getting started with the hobby of model kits!about this event: https://c3voc.deVon CrystalPixie

2025 might be the year of Linux on the desktop at Chaosdorf: ytvwld is trying to reinstall the public Windows laptops with NixOS, Plasma and lightdm. He explains why UX design is hard and why systemd is important.about this event: https://c3voc.deVon ytvwld

I tried reverse engineering a plugin for davinci resolve because I am not rich, can't buy it as a tax write-off and wanted a challenge. I do not endorse bypassing DRM illegally … hehabout this event: https://c3voc.deVon ente

Wir verschaffen uns einen Überblick über die physikalischen Effekte in Aero- und Hydrodynamik, die dafür sorgen, dass Segelschiffe schwimmen, vorwärts fahren und nicht umkippen. Danach wagen wir noch einen Blick darauf, was zusätzlich im Wasser passiert, wenn große Schiffe in engen Kanälen, Hafenbecken und rückwärts unter Motor manövrieren. grober …

Eine kurze Einführung in die Kunst des Speed Puzzlen und die Community.Auch Puzzlen kann spannend sein! Ich erzähle euch etwas über das Konzept des Speed Puzzlen, die möglichen Strategien und die Community dahinter. Ausserdem werde ich einige Puzzles mitbringen, falls danach gepuzzelt werden will.Licensed to the public under https://creativecommons…

sudo systemctl start [email protected] to the public under https://creativecommons.org/licenses/by/4.0/about this event: https://talks.dhcp.cfhn.it/dhcp25/talk/K97WMF/Von Patrick Hahn

Das Pentagon findet es gut, die Migrationsbehörde ICE findet es gut, Banken und Wirtschaft finden es gut, Sauron findet es sehr gut und da überrascht es nicht, dass die deutschen Sicherheitsbehörden es auch gut finden: Die Überwachungssoftware PalantirMomentan ist die amerikanische Überwachungssoftware Palantir in aller Munde. Nicht nur, weil die d…

Variational Autoencoders (VAEs) were first introduced as early concept learners in the vision domain. Since then, they have become a staple tool in generative modeling, representation learning, and unsupervised learning more broadly. Their use as analogues of human cognition is one of the first steps towards the understanding of more complex cognit…

Social Media geniesst keinen guten Ruf. Reisserische Posts erhalten mehr Reichweite als fundierte Meinungen, polarisierende Inhalte werden gefördert und die Macht darüber, was wir zu sehen bekommen, liegt in den Händen von Tech-Milliardären. Dennoch ist es für Vereine und Organisationen fast unmöglich, ihre Community zu pflegen und ihre Botschaften…

See you next year!Licensed to the public under https://creativecommons.org/licenses/by-sa/4.0/about this event: https://cfp.2025.matrix.org/matrix-conf-2025/talk/KAB39N/Von Yan Minagawa

Take a trip back through time with me as we learn about how bridges happened. Why did we do it at all? Whose idea was it to hook up the then fledgling matrix.org network to the biggest IRC network? How many databases were shredded in the line of duty?This talk features a journey back through time as we look at bridges and integrations that have bee…

The Cyber Resilience Act is a new European regulation that has the main goal to increase European cyber security and resilience, through accountability. A lot has been said about the impacts of the CRA on open source, in particular towards non-profit foundations, but what about organisations - such as Element - that operate complex licensing models…

Messaging platforms offer to protect user privacy via a variety of features, such as disappearing messages, password-protected chats, and end-to-end encryption (E2EE), which primarily protect message contents. Beyond such features, "untraceable communication" tools for instant messaging protect users from network attackers observing transport layer…

Join us for an introduction to the Element Server Suite Community, the simplest way to deploy a Kubernetes-based Matrix 2.0-ready stack, maintained by Element. This workshop will deploy all the components of the suite: a Synapse homeserver with Matrix Authentication Service enabled, a Matrix RTC backend for calls, and an Element web client. You'll …

This talk will introduce the Helen Nissenbaum's theory of Contextual Integrity as a framework for understanding privacy in messaging platforms. Contextual Integrity views privacy not as keeping information secret, but as making sure information flows in ways that match people’s expectations in a given context, or in other words, what feels appropri…

[NeoBoard](https://neoboard.io/) is an open source real-time collaborative whiteboard built on the Matrix protocol. It functions both as a widget within chat-focused Matrix clients like Element Web, and as a standalone web app that acts as a lightweight, whiteboard-centric Matrix clientIn this talk, we’ll share how we migrated NeoBoard’s real-time …

At Oodrive, our mission is to offer a secure and sovereign solution to manage our partners' most sensitive data.Building on this foundation, we are developing a secure collaboration platform that fully aligns with these values. Collaboration cannot happen without communication, therefore we decided to integrate a secure chat in our product. We chos…

Most of the discussions around privacy laws have been focused on the protection of data and condition of processing. But some others rights are starting to be litigated more widley and will soon play a bigger role for IT systems managers. This talk will focus on the GDPR article 16 (right to rectification), and how the current Matrix spec is inadeq…

Tammy is a multiplatform Matrix Messenger designed to be redefined by you. Want a different room list layout? Need a messaging interface tailored to a specific use case? Tammy’s extensible architecture makes that not only possible - but easy. In this talk, we’ll showcase how Tammy empowers developers to create radically customized Matrix experience…

In this talk I will present my journey in developing a decentralized and secure communication platform for a university with thousands students and faculty members. Using Matrix and Element as foundation I tailored the solution to meet academic needs, ensure data privacy and integrate with some systems, bots, widgets etc.The session will cover:- Wh…

fairkom has developed a [matrix]-based school messenger for the Department of Education of the German state of Rhineland-Palatinate to serve up to half a million users. Schulchat RLP has one code base for all platforms and is available as app on Apple and Google Play Stores.What makes this solution unique is the deep integration of the identity and…

A thank you from the organisers. We hope you enjoyed your day!about this event: https://talks.python-summit.ch/sps25/talk/QW7U3F/Von Orga

Our Lightning Talks are open to everyone 😊about this event: https://talks.python-summit.ch/sps25/talk/VG8HT8/Von Orga

Networks are all around us, shaping phenomena like epidemics, communication, and transportation. In this talk, we will explore how real-world problems can be analyzed and solved using graph-based methods and simple algorithms. Drawing from examples such as trade networks, corporate structures, and historical data, I will demonstrate how network ana…

Activation functions are fundamental elements of deep learning architectures as they significantly influence training dynamics. ReLU, while widely used, is prone to the dying neuron problem, which has been mitigated by variants such as LeakyReLU, PReLU, and ELU that better handle negative neuron outputs. Recently, self-gated activations like GELU a…

Germany’s digital health infrastructure has long been built on the principles of sovereignty, open standards, and interoperability. With the electronic patient record (ePA) and KIM for secure data and document exchange, Germany established a federated ecosystem using standards such as FHIR and OIDC with sectoral identity providers. The recent intro…

NATO organised a TaskForce-X Baltics event where we very quickly contracted, deployed and integrated telemetry and video streams from uncrewed platforms. This required a lot of coordination and this was done through our on-prem Matrix capability. I would like to share my experience by using Matrix to support this very demanding operational project.…

Trixnity is rapidly emerging as a powerful, flexible, and fully asynchronous SDK for building Matrix applications using Kotlin Multiplatform. What many don't realize: Trixnity is already in widespread use - potentially powering apps usable by over 50 million people. It’s embedded in multiple Matrix-based messengers, though you’d only know it by dig…

Data is the fossil fuel of the machine learning world, essential for developing high quality models but in limited supply. Yet institutions handling sensitive documents — such as financial, medical, or legal records often cannot fully leverage their own data due to stringent privacy, compliance, and security requirements, making training high quali…

Most modern software applications give total trust to the service provider. End-to-end encrypted (E2EE) services are different: the service provider is a gateway, and the real trust is with other people.This is unfamiliar, and can make using E2EE confusing. When you add in federation (meaning lots of different service providers) and a diverse set o…

Why is having large encrypted group calls difficult? How do other providers solve this? The future? Demos!Why are large encrypted group calls difficult to host? Specifically, we will go into the details about key sharing, how we can use some tricks to optimize it and how they are also a very big footgun.We will also see how other providers like jit…

We will provide you with the latest updates on Element X mobile apps, as well the plan to sunset our classic Element apps. This includes both the current state, as well as a look into what to expect during the next couple of months and details about specific features like threads and spaces that many people are looking forward to on Element X. In t…

This talk will detail how to integrate external threat intelligence data into an autonomous agentic AI system for proactive cybersecurity. Using real world datasets—including open-source threat feeds, security logs, or OSINT—you will learn how to build a data ingestion pipeline, train models with Python, and deploy agents that autonomously detect a…