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Chaos Computer Club - recent events feed (low quality)

Der Chaos Computer Club ist die größte europäische Hackervereinigung, und seit über 25 Jahren Vermittler im Spannungsfeld technischer und sozialer Entwicklungen.

technology

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00:41:56

Variational Autoencorders: the cognitive scientist's...

Chaos Computer Club - recent events feed (low quality) ·

2025/10/24

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 cognitive models leading up to models of human brain function and behavior. As part of a series of talks on cognitive science and deep learning at the realraum

00:23:45

Closing (matrix-conf-2025)

Chaos Computer Club - recent events feed (low quality) ·

2025/10/18

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/

00:27:44

Holding the Fort: How did bridges happen...

Chaos Computer Club - recent events feed (low quality) ·

2025/10/18

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 been built on Matrix over the years, and what we can hope to learn from it. There will be laughter, there will be eyebrows raised, there will be content

00:30:13

Leading the way into CRA compliance: Element’s...

Chaos Computer Club - recent events feed (low quality) ·

2025/10/18

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 with a mix of monetised and non-monetised products? In this talk we endeavour to shine a light on our thinking regarding CRA compliance for our

00:54:14

How do messaging app users feel about untraceability?...

Chaos Computer Club - recent events feed (low quality) ·

2025/10/18

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 metadata, which can reveal who communicates with whom, when, and how often. However, unlike E2EE, the effectiveness of these tools depends on large

00:14:05

Getting started with Element Server Suite Community...

Chaos Computer Club - recent events feed (low quality) ·

2025/10/18

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 be able to try it on your local laptop using your Docker daemon, or deploy it on a virtual machine with a single-node Kubernetes setup. Whether

00:18:14

Scaling Real-Time in NeoBoard: Our Journey from P2P...

Chaos Computer Club - recent events feed (low quality) ·

2025/10/18

[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 client In this talk, we’ll share how we migrated NeoBoard’s real-time collaboration feature from a peer-to-peer WebRTC implementation to MatrixRTC with a LiveKit backend, a shift that was key to scaling to hundreds of

00:31:43

A Contextual Integrity approach to privacy in...

Chaos Computer Club - recent events feed (low quality) ·

2025/10/18

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 appropriate to share, with whom, and for what purpose. For example, if Alice shares her live location with Bob through a messaging app, she likely expects the app

00:23:08

Integrating Matrix in a trustworthy collaborative...

Chaos Computer Club - recent events feed (low quality) ·

2025/10/18

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 chose the Matrix protocol to achieve that goal. Now that a first version is out and available to our partners, we want to share with the community how we

00:47:04

Portable identites (MSC 2787) and the GDPR right to...

Chaos Computer Club - recent events feed (low quality) ·

2025/10/18

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 inadequate for servers operators aiming to let people change their username, since MXID can't be changed (as of this proposal writing in June 2025). Based on

00:25:30

Building Matrix-Powered Campus Communication Platform...

Chaos Computer Club - recent events feed (low quality) ·

2025/10/18

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: - Why Matrix was chosen over other platforms. - Technical stack and deployment model. - Customization of Element and federation decisions. - Challenges

00:51:52

Solving the Fork Dilemma: How We Built a Maintainable...

Chaos Computer Club - recent events feed (low quality) ·

2025/10/18

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 experiences through its extension system. We’ll walk you through how we’re using Tammy to build Timmy, a TI-Messenger variant tailored for a very specific user

00:25:56

Schulchat RLP as [matrix]-based school messenger...

Chaos Computer Club - recent events feed (low quality) ·

2025/10/18

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 user management system from the "Bildungsportal RLP", ensuring seamless use for teachers, students, and even parents - from primary to vocational

00:02:13

Closing - Day 2 (sps25)

Chaos Computer Club - recent events feed (low quality) ·

2025/10/17

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

00:45:20

Lightning Talks - Day 2 (sps25)

Chaos Computer Club - recent events feed (low quality) ·

2025/10/17

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

00:32:27

What Networks tell us about Trades, Power, and the...

Chaos Computer Club - recent events feed (low quality) ·

2025/10/17

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 analysis reveals insights that would otherwise remain hidden. Using NetworKit (and NetworkX), we will analyze real-world datasets to answer questions like:

00:33:53

Gompertz Linear Units (GoLU) (sps25)

Chaos Computer Club - recent events feed (low quality) ·

2025/10/17

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 and Swish have emerged as state-of-the-art alternatives, leveraging their smoothness to ensure stable gradient flow and prevent neuron inactivity. In this

00:38:23

Supporting TF-X with Matrix: best practices and...

Chaos Computer Club - recent events feed (low quality) ·

2025/10/17

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. Licensed to the public under https://creativecommons.org/licenses/by-sa/4.0/ about this event:

00:25:46

The Role of the Matrix Protocol within Germany’s...

Chaos Computer Club - recent events feed (low quality) ·

2025/10/17

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 introduction of the TI-Messenger (TIM) extends this ecosystem to real-time communication — now connecting over 25 million insured citizens through the RISE

00:26:13

The Matrix SDK No One Talks About (matrix-conf-2025)

Chaos Computer Club - recent events feed (low quality) ·

2025/10/17

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 digging into app license disclosures. This talk shines a light on Trixnity’s hidden but significant role in the Matrix ecosystem and why more developers

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