Chaos Computer Club - archive feed

Ever wondered what data is stored inside DB print-at-home train tickets or those in your local transport association's app? Join me for the deep dive into digital railway ticketing you didn't know you needed. After getting my shiny new Deutschlandsemesterticket from University I was so annoyed with the quality of the SaarVV app that I set out to put my train tickets into Apple Wallet - whether the...

Gaining a reasonable level of trust on the firmware that runs your everyday activities Corebootable or not corebootable, that is the question. The nerdiest nerds already corebooted their old X230 ThinkPads... but what about your new ThinkPad, or even your gaming rig? Well, Intel has a trick called the "BootGuard" inside the Management Engine. It is supposed to protect the firmware and only allow u...

I'll introduce the technology underlying bluetooth trackers from Apple and Google, and will describe and show what can actually be seen on the air (using a hackrf/rad1o for example). This is part demonstration of what is possible right now, part explanation of the underlying principles, and part invitation to would-be hackers to make creative use of this technology. Apple's "Find My" network has b...

Wir Hackende müssen eine große Gefahr für unsere eigenen Daten sein, wenn die Hersteller die Maßnahmen ergreifen, die ich euch in diesem Talk unter Anderem vorstelle. Wie bekomme ich Daten aus DJ-Systemen und vielleicht auch wieder hinein? Wenn wir als DJs Daten in DJ Systeme eingeben, wollen wir diese vielleicht auslesen oder von außen mit unserer eigenen Software verändern. Dieser Talk ist ein Ü...

Dieser Talk deckt die Fundamentals zu Samplingrate, Bitdepth und Bitrate ab und erklärt die Stärken und Schwächen aller Audio Datei-Formate, die für DJs und Produzent/innen relevant sind: MP3, AAC, FLAC, WAV, AIFF und vielleicht noch mehr. Wenn du mal Probleme mit manchen Dateien auf CDJs hattest, ist das hier der richtige Talk für dich. Neben den im Abstract genannten Fundamentals erkläre ich, wa...

The Russian disinformation campaign Doppelgänger is considered to be technically highly sophisticated. Research by CORRECTIV and Qurium has revealed that the Russian state relies on the toolbox of internet fraudsters for the dissemination of propaganda and fakes. A talk on the state's possible alliance with the criminal world - and on possibilities and limitations of countering it. Its goal is to...

In the October 2023 update, Windows 11 introduced support for 11 additional compression formats, including RAR and 7z, allowing users to manage these types of files natively within File Explorer. The enhancement significantly improves convenience; however, it also introduces potential security risks. To support these various compression formats, Windows 11 utilizes the libarchive library, a well-e...

More money for Free and Open Source Software - a never ending issue. In a tech world built on start-ups, venture capital and data-gathering apps, the fight for sustainable funding for ethical technology projects is a fierce one. After some big victories for FOSS funding in the last years, this talk is about the importance of not forgetting the small, underdog civil society projects. How do we fund...

Mars is famously the only planet (we know of) that is entirely inhabited by robots. And these robots are working hard on looking for something that would be one of the most significant discoveries in the history of science: Alien life. But how do you look for something that no one has ever seen? And would we recognize it if we find it? Join me on a journey through Mars’ ancient past and Earth’s mo...

You want to share your code with the world. That's great! But how? Just uploading it to Github? Or how do I do this? In this talk I want to give you an overview about the minimal steps you should take to prepare your code for publication. Covering what belongs into a repository, how to make your code sharable and which license to pick. This talk is based on the training [Foundations of Research So...

How do you think? People can experience thoughts, feelings, and sensory inputs very differently. While context and substances are known to promote changes in perception and thinking, the biological basis is very diverse, contrary to what is often assumed. Brain cells come in extraordinary varieties in size, shape, and complexity. Their synaptic connectivity provides the foundation of all our senso...

Not only the energy consumption of AI is exploding. Less known is that other resources like water or metal are also affected. The talk gives an overview on the devastating impact of datacenters on our environment. Degrowth scenarios seem to be the only way to escape from this ecological nightmare. Summarizing the known facts and serious predictions the talk gives an overview on the upcoming possib...

Habt ihr euch immer schon gefragt wie Museumssammlungen ins Netz kommen, warum online Sammlungen meist immer noch aussehen wie Kataloge seit dem 19. Jahrhundert, was für Strategien und Förderprogramme dahinter stecken, welche Firmen hier quasi-Monopole haben, und warum Museen so viele Hoffnungen (Zugang! Partizipation! Demokratie!) mit der Digitalisierung verbinden? Der Talk ist eine Einladung an...

Computer network operators depend on optical transmission everywhere as it is what glues together our interconnected world. But most of the industry is running the same kinds of signals down the optical transceivers. As part of my need to "Trust, but verify" I wanted to check my assumptions on how the business end of modern optical modules worked, so join me in a adventure of sending weird signals...

What does it take to get a Genome into the computer? A slightly technical, political and personal dive into the field of genomics. This will be in the first part an introductory talk to Genomics, covering "How do you get a genome into your computer?". As I'm a bioinformaticist, i will briefly mention sequencing, but focus on the computation. Because it turns out that getting a human genome into yo...

The density of memory cells in modern DRAM is so high that disturbance errors, like the Rowhammer effect, have become quite frequent. An attacker can exploit Rowhammer to flip bits in inaccessible memory locations by reading the contents of nearby accessible memory rows. Since its discovery in 2014, we have seen a cat-and-mouse security game with a continuous stream of new attacks and new defenses...

In an accelerating climate crisis, renewable energy and electrification are the most important tools to reduce greenhouse gas emissions. However, in sectors where electrification is infeasible or impossible, other solutions will be needed. While hydrogen gets a lot of attention, it suffers from challenges like being difficult to transport and store. While it does not receive nearly as much attenti...

How to run an MVNO with values: What are the requirements? Do you need a government license, maybe a lot of investment? There are different types of MVNOs. We will talk about how to do business as an MVNO while respecting users' privacy, supporting free software, believing in the right to repair and making your customers technologically sovereign. The issues with data privacy are being discussed m...

Der Vortrag wirft einen sozialwissenschaftlichen Blick auf die Ideologie des Longtermismus. Seine Funktion im digitalen Kapitalismus wird analysiert. Mithilfe von Klassikern der Soziologie wird dargestellt, warum sich diese Ideologie in eine faschistische Richtung entwickelt. Longtermismus ist die neue Hype-Ideologie des Silicon Valley. Elon Musk und Sam Altman haben sich als Anhänger geoutet, er...

All I wanted was for Microsoft to deliver my phishing simulation. This journey took me from discovering trivial vulnerabilities in Microsoft's Attack Simulation platform, to a Chinese company to which Microsoft outsourced its support department that wanted all my access tokens. I finally ended up hijacking remote PowerShell sessions and obtaining all data from random Microsoft 365 tenants, all the...

We present Milksad, our research on a class of vulnerabilities that exposed over a billion dollars worth of cryptocurrency to anyone willing to 'crunch the numbers'. The fatal flaw? Not enough chaos. Learn how we found and disclosed issues in affected open source wallet software, brute-forced thousands of individual affected wallets on a budget, and traced over a billion US dollars worth of prior...

Kommunaler Klimaschutz ist oft undurchsichtig, komplex und bürokratisch – das wollen wir ändern! Als gemeinsames bewegungsübergreifendes Projekt "Stadt. Land. Klima!" machen wir (fehlenden) kommunalen Klimaschutz sichtbar, messbar & verständlich! Mit einem einheitlichen Maßnahmenkatalog können alle klimainteressierten Menschen den Fortschritt ihrer Stadt oder Gemeinde bewerten und in unserem Ranki...

Ich lese aus einem antiken Werk zu Computerablürzungen vor Abkürzungen können alle verwirren, die sich noch nicht länger mit Computern beschäftigen. Aber auch der:dem Veteran:in sind nicht alle Abkürzungen bekannt oder weißt Du, dass IFE für intelligent front end steht, CAFS für Content Adressable File System oder RUN der Befehl ist, um Programme in BASIC auszuführen? Dieser Missstand muss behoben...

A couple years ago I knew basically nothing about Single Sign-On but now I'm talking at 38c3 about it! Come find out how you too can go from beginner to the question-asker who protects your hackerspace/company/etc. from bad SSO implementations. Single Sign-On (SSO) is sold as a way to • centralize managing your organization’s users, • make life easier for your colleagues, and • enforce consistent...

You are not immune to propaganda and the only winning move is to first recognize you are forced to play The Game Meme Warfare - das heißt schnelllebige, leicht konsumierbare Propaganda auf Social Media. Jeden Tag sind wir Ziel absichtlicher Meinungsmanipulation - noch mehr wenn es mal wieder auf eine Wahl zugeht. Eine der wichtigsten Punkte von Medienkompetenz ist Propaganda und sog. "Fake News" z...