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Chaos Computer Club - recent events feed

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

technology

All Episodes

00:42:07

WHY Lightupyourbanjo (WHY2025)

Chaos Computer Club - recent events feed ·

2025/08/11

The Light and Music entertainment platform Lightupyourbanjo began in 2010 when “Cash-a-billy with a Bluegrass bite” band Ed and the Fretmen wanted to have better lights on their banjo. They developed banjo lights with addressable LEDs for in and outside mounting showing interactive animations, written in C++ supporting the songs, and wrote songs to support the lights. In 2025 the Lightupyourbanjo bands will be fighting the darkness with the new O4 model build into their 3 banjos. In the WHY

00:43:25

Nerding out over silly machines (WHY2025)

Chaos Computer Club - recent events feed ·

2025/08/11

You've maybee seen the raking robot that got a CEH (Certified Estetisch Harker) certificate, the Telex linked to Twitter/Telegram or the ASCII foto booth. They are all made by me. If this talk gets accepted I will do a deep dive on these three contraptions and what I learned building them. Beside Schuberg Philis, DIVD, attending the farm and keeping my bees I als build machines. It is an interesting process and I want to share it with you. Machiens I will be talking about: * The (worlds?) 1st 3d

00:39:34

Using deployment diagrams to explain architecture and...

Chaos Computer Club - recent events feed ·

2025/08/11

This talk will enable you to lead architecture conversations and discuss their security options through an informal diagramming technique. I will use examples such as key/encryption architectures, DevOps, and even your home music system. Presentation at https://digitalinfrastructures.nl/why2025/ You have seen many diagrams of computer and information systems in your career. They have been around since the early days of computing. They can be useful, but there are a few typical problems with

00:46:53

Offworld Voyage: Can Training for Mars Exploration...

Chaos Computer Club - recent events feed ·

2025/08/11

This talk will present the design philosophy behind Offworld Voyage, a decentralized science initiative that develops ecologically sustainable training habitats for use in simulated Mars surface exploration missions - while also solving for adaptation to extreme climate change on Earth. The Offworld Voyage M.A.R.S. Tesseract Space Analog Simulation Habitats were designed with a zero waste ethos for minimal environmental impact by inventor Scott Beibin and visual wizard Michael Flood. The modular

00:43:47

Building Bitchat: Offline first protocols and E2E...

Chaos Computer Club - recent events feed ·

2025/08/11

Learn how to build end-to-end encrypted social apps including the newly released Bitchat using Nostr and MLS (Messaging Layer Security). We'll go from Nostr basics through to encrypted groups, explore the open source libraries and apps already in production, and show how to build your own. Includes live coding demonstrating how to create secure, private social tools that actually scale. You'll leave knowing how to build real e2e apps using tested, working tools. Building truly private social

00:33:10

Die Hardcoded: Unlocking Yealink's (weakest) secrets...

Chaos Computer Club - recent events feed ·

2025/08/11

During this talk we look at hardware and firmware reverse engineering, but also at corporate intimidation tactics and how to respond ethically as a security researcher. Leveraging the hard-coded AES keys, outdated software, and lots and lots of custom code we found, we were able to install "custom code" on some phones and access global customer configuration data by exploiting Yealink's global cloud provisioning service (RPS). Communication is the cornerstone of human collaboration and vital to

00:37:31

How we stopped a € 50 million project from destroying...

Chaos Computer Club - recent events feed ·

2025/08/11

In 2017 a large corporation announced that they wanted to build a € 50 million theme park in a small forest that I had known from my childhood, thus replacing the future of our children with simple entertainment. An overwhelming feeling of injustice came over us. We created a plan, and we stuck to it. We drew a line in the sand. Fatalism can be your greatest enemy, but it doesn’t have to be. Welcome to the rebellion. In 2017 a large corporation announced that they wanted to build a water theme

00:50:02

Caveat Emptor: Ratings and Reviews Can't Be Trusted...

Chaos Computer Club - recent events feed ·

2025/08/11

It's hard for a platform to have meaningful, useful ratings/reviews without both substantially Knowing Your Customer, engineering to detect manipulated reviews, and responding in a nuanced way -- to increase a fraudster's costs, and not just train them to hide better. Lots of examples of diverse platforms not doing a very good job of this. (I'll also talk about how this knowledge sometimes leads platforms try to manipulate their own customers to maximize their sales). Ratings and reviews,

00:23:13

The story and maths behind the Sferical lamps (WHY2025)

Chaos Computer Club - recent events feed ·

2025/08/11

My experience of contributing to an open-source project for the first time and the juicy details (maths) of the geometry of the Sferical lamps (the ones that hang in Heaven / Silent Lounge) I'd like to take you with me on how I build a generator for spherical lampshades. I'll talk about how math slowly turns into magic. The math is mainly trigonometry, so we can reminisce about highschool. But don't worry too much about it. It will be visualised, so everyone can follow along. The real magic

00:32:01

Reviewing live-bootstrap (WHY2025)

Chaos Computer Club - recent events feed ·

2025/08/11

live-bootstrap is a worthy attempt to provide a reproducible, automatic, complete end-to-end bootstrap from a minimal number of binary seeds to a supported fully functioning operating system. Although it is starts with a minimal binary seed of only 280 bytes it also depends on a lot of other sources. What are those sources exactly and how can we review these to make sure that live-bootstrap can be trusted? In the past two years, I spend studying stage0 of the live-bootstrap project in order to

00:24:44

Guardians of the Dutch healthcare part 2: NIS2...

Chaos Computer Club - recent events feed ·

2025/08/11

In 2017 (just before SHA2017) the Dutch healthcare sector came together to create Stichting Z-CERT, the Zorg Computer Emergency Response Team. A nonprofit to protect and advise the Dutch Healthcare sector. What started as a small startup has now grown into a scaleup with the ambitions to match. A lot has changed in the 3 years since the last talk about Z-CERT. In this talk we will: - Tell who we are - Show what we do - Give a little peak behind the curtain how we do that Licensed to the public

00:22:10

A Journey Through Boring Telco Data Leaks (WHY2025)

Chaos Computer Club - recent events feed ·

2025/08/11

Over the past few years, I’ve been casually poking around and stumbling upon exposed data and insecure infrastructure all across the telco ecosystem. From unsecured debug portals to full backend access, the leaks themselves might seem technically boring. In this talk, I’ll walk through a handful of real-world cases, showing how misconfigurations, sloppy code, and forgotten interfaces can lead to serious exposures. These include: * an eSIM provisioning portal exposed via unauthenticated debug web

00:48:57

From barking to Meow: mature pentesting (WHY2025)

Chaos Computer Club - recent events feed ·

2025/08/11

In a world of relentless cyber-threats, MIAUW (Methodology for Information Security Assessment with Audit Value) turns every pentest into a high-impact, traceable mission. This session reveals how its storyline-driven playbook fuses technical exploitation, legal rigor and forensic reporting into a reusable blueprint that regulators love and attackers fear. Expect war-stories, live-demo snippets, and a roadmap to weaponize compliance while clawing back control over risk. This talk introduces MIAUW —

00:46:29

WHY and how would somebody cycle over 500km to a...

Chaos Computer Club - recent events feed ·

2025/08/11

I (hopefully) will have cycled from my home city of Mannheim all the way to the WHY camping grounds (>500km) in one go. I will report how I approached the whole endeavour, how I prepared, what the challenges were and what the hard part was. If I happen to not make it, I will describe how, why and what I should have done better. Planing and executing a plan like that, cycling more than 500km in one go demands equal parts preparation and lack of sanity. I want to share the story in an attempt to

00:25:07

🛡️ Linux Permissions and Hardening (WHY2025)

Chaos Computer Club - recent events feed ·

2025/08/11

You want to learn more about Linux permissions? This is the talk for you. Let's learn about the basic UID/GID concepts in Linux and expand into more complex ACLs. Then escalating on the "everything-is-a-file" concept and applying the learned security logic onto program behavior using SELinux or AppArmor. The first point a "normal" user encounters Linux permissions, is often when he wants to execute a downloaded file (from the internet) - requiring him to set the executable-bit... But this one bit

00:54:12

WHY2025 Infrastructure Review (WHY2025)

Chaos Computer Club - recent events feed ·

2025/08/11

Placeholder for WHY2025 Infrastructure Review... various *OC teams will present about the infrastructure they have built for WHY2025. At least Team:NOC will join; previously also Team:Nuts (Power), Team:POC and Team:VOC have joined. Licensed to the public under https://creativecommons.org/licenses/by/4.0/ about this event: https://program.why2025.org/why2025/talk/FY8CXY/

00:41:15

AiTM panels and sellers (WHY2025)

Chaos Computer Club - recent events feed ·

2025/08/11

Adversary-in-the-Middle (AiTM) phishing kits have matured into full-service SaaS platforms. This talk dives into the infrastructure, control panels, and sellers behind modern AiTM attacks. From Dockerized environments to Telegram bot-based UIs, we unpack how these platforms operate, scale, and monetize. We also highlight how this SaaS model is spreading. Expect a technical walkthrough of the ecosystem fueling today’s phishing economy. This talk offers a deep dive into the infrastructure and

00:48:20

The WHY, the How, the What. An assessment of TETRA...

Chaos Computer Club - recent events feed ·

2025/08/11

TETRA is a European standard for trunked radio used globally by police, military and civilian parties alike. In the past, we already published the hitherto secret inner workings of TETRA and on several of its severe security issues. We're now back to discuss the last crucial part of TETRA security - its optional (and costly) end-to-end encryption, reserved for the most sensitive use cases. We'll discuss in detail how we obtained and analyzed those elusive algorithms, and what we found. TETRA is a

00:45:58

Containing the Horror — A Critique on Docker & Co...

Chaos Computer Club - recent events feed ·

2025/08/11

For a good decade now, containerisation has been a popular solution: Addressing issues such as security, fault tolerance, and scalability, it has turned into a mainstay in IT. Though with a technology that ubiquitous, it does deserve investigation whether it has been put to good use or rather pressed into service. This talk includes a brief history of container solutions while challenging a number of common assumptions. While geared at a more seasoned audience, the presentation is very much from

00:50:04

Reverse Engineering Life: Afterparty (WHY2025)

Chaos Computer Club - recent events feed ·

2025/08/11

Afterparty for "Reverse Engineering Life: A teardown of the DNA source code of a whole bacterium". Q&A and some bonus content. Licensed to the public under https://creativecommons.org/licenses/by/4.0/ about this event: https://program.why2025.org/why2025/talk/A8LMHV/

1,910 results

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