Chaos Computer Club - archive feed

Über KI geredet wird viel, doch was geschieht in der Schweiz? Die Fachgruppe Automated Decision-Making Systeme (ADMS) der Digitalen Gesellschaft ist seit den Anfängen in der Schweiz mit dabei. Gerade kürzlich hat der Bundesrat den Bericht zu möglichen Regulierungsansätze für Künstliche Intelligenz in der Schweiz veröffentlicht. Damit macht der Diskurs um eine Regulierung einen grossen Schritt nach vorne. In diesem Vortrag beleuchten wir die Grundrisiken von künstlicher Intelligenz, wir werfen einen Blick zurück auf vergangene Entwicklungen und diskutieren die Strategie der nächsten Jahre. about this event: https://winterkongress.ch/2025/talks/ki_und_automatische_entscheidungssysteme_die_regulierung_kommt_nach_dem_hype/

«Die Cloud» ist in aller Munde. Und es wird viel versprochen, insbesondere Sorglosigkeit und finanzielle Einsparungen. Dies stimmt. Aber nicht immer. Manchmal bedeutet es auch das Gegenteil, wie erste Erfahrungen von der Flucht aus der Cloud zeigen. Um diese Diskrepanz zu verstehen, müssen wir die unterschiedlichen Aspekte rund um die Cloud zuerst trennen und strukturieren. Anhand von einfach verständlichen Analogien wie dem Schrebergarten und einer Analyse des Use-Cases «Swiss Government Cloud» lernen wir die Cloud kennen und identifizieren ihre Vor- und Nachteile. about this event: https://winterkongress.ch/2025/talks/die_cloud_als_schrebergarten_missverstandnisse_beharrlich_ausgeraumt/

Max, Nick, und Ben lesen allesamt zu viel KI news. Sie behaupten zwar, dass das alles im Rahmen ihrer Jobs im Consulting oder der Forschung geschieht, aber letztendlich finden sie es vor allem einfach spannend. Um ihre Faszination zu rechtfertigen, haben sie euch das letzte Jahr in der KI zusammengefasst. Euch erwartet euch ein Update, in dem sie euch alles (mehr oder weniger) Wissenswertes kurz erzählen, von neuen Modellen, heiteren und heiklen Pannen, und natürlich auch Nvidias Aktienkurs. Seit 2022 fühlt sich so an, als seien im Bereich KI jedes Jahr Entwicklungen geschehen, die sonst Jahrzehnte benötigen. Wir geben euch eine kurierte Zusammenfassung des letzten Jahres, um euch die mühsame Arbeit zu ersparen, euch durch alle Veröffentlichungen zu arbeiten. Dabei behandeln wir sowohl die beworbenen Fähigkeiten neuer Modelle (ohne die technischen Details), als auch auch den Einfluss, den diese Veränderungen auf die Gesellschaft als Ganzes haben: von Pannen bei den einfachsten Aufgaben bis hin zur autonomen Entscheidung über Leben und Tod, KI hat überall ihre Finger im Spiel. about this event: https://winterkongress.ch/2025/talks/a_year_in_ai/

Die Eröffnung am Freitag about this event: https://winterkongress.ch/2025/talks/eroffnung_freitag/

Du hast mit <Lösung> herumgespielt und suchst jetzt ein Problem um das mal in Echt auszuprobieren? Du willst nicht immer nur Prototypen basteln sondern auch mal was Produktiv einsetzen? Eventuell hat eine Museumsbahn (oder ein beliebiger anderer Verein) ja ein Problem, das zu deiner Lösung passt... Museumsbahnen (und andere Vereine auch) brauchen Hilfe bei der Digitalisierung, sei es Webseiten, sei es in der Werkstatt, oder im Betrieb. Von Administration bis zum Aufbau eines Funknetzes durch ein ganzes Tal wird Unterstützung gebraucht. Und nebenbei könnt ihr noch mit Zügen spielen. Im Vortrag stelle ich euch kurz die Dampfbahn Fränkische Schweiz in Ebermannstadt vor und gebe einige Beispiele wo wir Digitalisierung brauchen und teilweise schon haben. Offene Themen sind derzeit: Funkverbindung zu unseren Zügen, Fahrgastinformation, Streckenvermessung, Kommunikation im Verein... Kulturelle Unterschiede zwischen Chaos und Museumsbahn gibt es, aber es gibt auch viele Gemeinsamkeiten. Museumsbahnen bieten eine Möglichkeit, Dinge in der Realität auszuprobieren. Und für viele der Museumsbahnen haben die Chaos-Vereine schon Lösungen. Licensed to the public under https://creativecommons.org/licenses/by-sa/4.0/ about this event: https://cfp.zam.haus/wicmp-2025/talk/WQLLYD/

Ein paar wichtige Überlebenshinweise zur WICMP10. Bedienungsanleitung zum Event. Licensed to the public under https://creativecommons.org/licenses/by-sa/4.0/ about this event: https://cfp.zam.haus/wicmp-2025/talk/PJU93E/

Closing talk of Hackerhotel 2025 with NFIR CTF award ceremony. Licensed to the public under http://creativecommons.org/licenses/by/4.0 about this event: https://pretalx.hackerhotel.nl/2025/talk/YBZVUM/

The internet cleanup foundation publishes the baseline security of 150.000 domains of 10.000 important organizations in the Netherlands. This talk shows what we've done in 2024 and highlights some of the nice things to come in 2025 maybe spoiling one or two things :) - It had a ton of impact and large banks, internet providers and all kinds of other institutions cleaned up their baseline security issues. Licensed to the public under http://creativecommons.org/licenses/by/4.0 about this event: https://pretalx.hackerhotel.nl/2025/talk/MDKVVA/

Operational Technology (OT) is vital for industrial processes, yet strategic understanding of OT’s security complexity is often lacking at the executive level. This presentation emphasizes the need for organizations to approach OT as a strategic priority, highlighting its unique challenges—such as legacy systems and non-negotiable uptime—amid rising cyber threats targeting critical infrastructure. By fostering executive insight into OT management, organizations can improve resilience, enhance security, and gain a competitive edge, ultimately positioning OT as an asset in operational stability and corporate strategy. This presentation, titled "The 'O' in OT," explores the importance of executive-level understanding of Operational Technology (OT) within strategic frameworks. It highlights the distinct challenges OT faces compared to IT, including legacy infrastructure, strict uptime requirements, and rising cyber threats. Participants will gain insight into how a strategic focus on OT security and management enhances organizational resilience and competitive strength. By bridging the gap between OT’s operational demands and executive decision-making, this session outlines steps for integrating OT into a cohesive, secure, and future-ready corporate strategy. Licensed to the public under http://creativecommons.org/licenses/by/4.0 about this event: https://pretalx.hackerhotel.nl/2025/talk/7BDKGK/

Our workflow, challenges and other fun things From the lands where badges and brooches grow on trees, a mythical folk of badge herders live peacefully and in harmony with nature and technology. They love providing humans with their seasonal harvest at Hacker events such as Hacker Hotel. We expect them to show up to tell you all about this seasons yield badges and what it took to deliver these in the hands of the Hacker Hotel people. Licensed to the public under http://creativecommons.org/licenses/by/4.0 about this event: https://pretalx.hackerhotel.nl/2025/talk/CQRYEL/

The European electricity network has become a ‘smart grid.’ This offers many opportunities for sustainability but also makes our energy system more vulnerable to digital attacks. In a time of increasing threat of hybrid warfare, the government and the energy sector realize that we as a society must prepare for possible disruption of the energy system and do everything we can to prevent it. Various institutions test smart devices, set safety standards, and monitor compliance with these standards. However, parties such as our grid operators only have control over the energy grid equipment up to the front door. They are not allowed to look beyond the electricity meter, where most smart equipment is located. DIVD is allowed to do this and by identifying devices that can form a botnet, DIVD helps to make the smart grid more secure. DIVD has been conducting research into vulnerabilities in equipment of the energy system, such as charging stations, solar panel inverters, home batteries, and (Home) Energy Management Systems. Previous findings have led to several parliamentary questions and follow-up actions by authorities such as RDI, the Dutch Authority on Digital Infrastructure. With the CVD in the Energy Sector project, DIVD will set up a research and education line with the DIVD.academy in collaboration with the energy sector to reduce the digital vulnerability of our energy system. DIVD will also build a hardware lab to test devices and scenarios. You may join too and help to save the grid. In this talk, we will demonstrate how we could have generated outages using zero-days we found in solar converters and electric car chargers. But we also did it with just one user-password combination… The European electricity network has become a ‘smart grid’. Consumers are not only users but also producers of energy. More and more devices are connected, smart and online, so supply and demand can be more easily matched. This offers many opportunities for sustainability and possibilities for new players to enter the market. But also makes our energy system more vulnerable to digital attacks. In a time of increasing threat of hybrid warfare, the government and the energy sector realize that we as a society must prepare for possible disruption of the energy system and do everything we can to prevent it. In the Netherlands and Europe, various institutions test smart devices, set safety standards, and monitor compliance with these standards. However, parties such as our grid operators only have control over the energy grid equipment up to the front door. They are not allowed to look beyond the electricity meter, where most smart equipment is located. Being an independent non-profit research institute, DIVD is allowed to do this. By looking for devices that can form a botnet, DIVD helps to make the smart grid more secure. DIVD has been scanning the entire internet for vulnerabilities since 2020 and reporting them to the owners of systems. This may involve known vulnerabilities (Common Vulnerabilities and Exposures), new vulnerabilities (Zero-days), leaked credentials (username-password combinations) and online sources that are unintentionally accessible. DIVD is also a CVE Numbering Authority (CNA) and can publish new vulnerabilities. Our way of working is supported by the parties responsible for digital security in the Netherlands, such as NCTV, NCSC, AIVD, police, and many cyber security companies. In addition to these activities, DIVD also conducts research into vulnerabilities in the equipment of the energy system, such as charging stations, solar panel inverters, home batteries, and (Home) Energy Management Systems. Previous findings have led to several parliamentary questions and follow-up actions by authorities such as RDI, the Dutch Authority on Digital Infrastructure. With the CVD in the Energy Sector project, DIVD will set up a research and education line with the DIVD.academy in collaboration with the energy sector to jointly reduce the digital vulnerability of our energy system. In 2025, we will: - Incorporate all energy-related research by DIVD into a research line under a Research Lead Energy. - Establish structural partnerships with the energy sector to jointly resolve vulnerabilities. - Build our own hardware lab where we will test peripheral equipment for security and collaborate with other hardware labs. - Set up our CNA to receive, process, and publish CVEs of digital solutions used in the energy system. Share research findings with authorities to support their enforcement. DIVD.academy familiarize students with basic knowledge of energy systems and energy equipment and involve them in practice-oriented research. - Develop teaching materials for the installation sector and training courses to increase awareness of vulnerabilities in the energy system. - Share our knowledge via hacker events and security conferences. In this talk, we will demonstrate how we could have generated outages using zero-days we found

This talk will take you along with a deep dive on how the internet works at its core and how you can participate yourself. You'll learn all about BGP, AS- numbers, IP-prefixes and more. Ever wanted to become sovereign on the internet? Want to know what its like to run an ISP? Are you a sysadmin that wants to learn more about networking? Then you're at the right place. This talk will take you along with a deep dive on how the internet works at its core and how you can participate yourself. You'll learn all about BGP, AS- numbers, IP-prefixes and what you need to do if you want to participate. You will walk away with practical knowledge on how you can get started. We'll also take a short tour of my own network, how I set it up and what I use it for. Licensed to the public under http://creativecommons.org/licenses/by/4.0 about this event: https://pretalx.hackerhotel.nl/2025/talk/V7QUX3/

Wat je als 𝘏𝘰𝘮𝘰 𝘊𝘺𝘣𝘦𝘳𝘯𝘦𝘵𝘪𝘤𝘶𝘴 altijd al hebt willen weten: hoe krijg je het voor elkaar dat de 𝘏𝘰𝘮𝘰 𝘖𝘳𝘥𝘪𝘯𝘢𝘳𝘪𝘶s (= niet hackende mens) ein-de-lijk het belang van jouw werk inziet en een beetje meewerkt. Strijk neer op je handdoek en leun achterover, want deze zondagmiddag (Don't Panic. Time is an illusion.) nemen Roxane Kortland en ik je mee hoe je als 𝘏𝘰𝘮𝘰 𝘊𝘺𝘣𝘦𝘳𝘯𝘦𝘵𝘪𝘤𝘶𝘴 effectief communiceert met de 𝘏𝘰𝘮𝘰 𝘖𝘳𝘥𝘪𝘯𝘢𝘳𝘪𝘶𝘴 (de niet hackende mens). Waarom? Communicatie is fantastisch, duh. En doelgerichte communicatie zorgt ervoor dat die 𝘏𝘰𝘮𝘰 𝘖𝘳𝘥𝘪𝘯𝘢𝘳𝘪𝘶s ein-de-lijk het belang van jouw werk inziet en een beetje meewerkt. Tip: neem een pen mee Licensed to the public under http://creativecommons.org/licenses/by/4.0 about this event: https://pretalx.hackerhotel.nl/2025/talk/Z38YHU/

Nuclear fusion is a clean safe energy. Fusing hydrogen nuclei to release an enormous amount of energy. This talk will cover: - A recap of the physics that makes fusion work - How to build a fusion reactor at home - How nuclei collide and what is needed to the coulomb barrier - Challenges in how to scale it up and make it generate more power - How far are we to have fusion energy on the power grid - Current technical challenges in fusion - How we can solve problems using machine learning Nuclear fusion promises a clean, safe, and abundant source of energy by fusing hydrogen isotopes to release more power than is put in. In this talk, we will start by clarifying the fundamental physics of fusion—how overcoming the Coulomb barrier allows two hydrogen nuclei to fuse. We will then explore the path to industrial-scale fusion power, focusing on international prototypes such as ITER, designed to demonstrate an energy output of Q=10 (50 MW in, 500 MW out). Alongside the incredible engineering achievements involved in building such large machines, we will discuss the complexities of controlling high-temperature plasmas, mitigating disruptions, and managing edge-localized modes (ELMs). Throughout the talk, we will highlight novel control and diagnostic strategies, including machine-learning-based models that can aid real-time plasma monitoring and regulation. Ultimately, we will address how these technologies, with deeper physical understanding, can bring us closer to fusion’s full potential as a reliable and low-waste energy source. Licensed to the public under http://creativecommons.org/licenses/by/4.0 about this event: https://pretalx.hackerhotel.nl/2025/talk/YJZ9KL/

Tijdens Hacker Hotel krijg je de unieke kans om deel te nemen aan Operation Check Mate, een meeslepende interactieve ervaring waarin je zelf in de schoenen van een rechercheur staat. Deze game is ontwikkeld door experts uit het veld en biedt een fascinerende inkijk in de wereld van strafrechtelijk onderzoek. In teams werk je aan een intrigerende zaak, waarbij alle aspecten van recherchewerk aan bod komen: 🔍 Recherchewerk: Analyseer de zaak, stel kritische vragen en bepaal de volgende stappen. 🗣️ Verhoor: Onderzoek hoe je informatie boven tafel krijgt tijdens een verhoor. 🏠 Doorzoeking: Plan en voer een doorzoeking uit. Wat mag wel en wat niet? 📱 Digitaal forensisch: Werk met echte digitale sporen en leer hoe je deze effectief kunt vorderen en analyseren. 📂 Dossieropbouw: Bouw een sterk strafdossier dat standhoudt in de rechtszaal. Deze game is méér dan een simulatie: je werkt met scenario’s die zijn ontwikkeld door experts uit het veld, waaronder forensisch onderzoekers, pentesters en professionals uit de strafrechtketen (denk aan politie, OM en rde Rechtspraak). Bovendien hebben creatieve geesten met een verknipte blik gezorgd voor onverwachte twists en uitdagingen. Maar hier komt de echte uitdaging: hackers zijn vaak kritisch over de politie. Toch, als je nu écht in de schoenen van een rechercheur staat, is het allemaal wel zo simpel als het lijkt? Kun je jouw technische en tactische skills combineren met juridische en ethische overwegingen? En hoe ga je om met druk, complexe gegevens en menselijke factoren? Het hoogtepunt? Op zondag mondt de zaak uit in een rechtszaak waarin jouw werk op de proef wordt gesteld. Durf jij het aan om jouw skills in de praktijk te brengen en een zaak tot een succesvol einde te brengen? Praktisch: 📅 Start: Vrijdag 14 februari 2025 om 13:37 ⚖️ Rechtszaak: Zondag 16 februari om 14:30 📍 Meld je aan via: [email protected] 💡 Let op: Het aantal plaatsen is beperkt. Grijp deze kans, sluit je aan bij een rechercheteam en ontdek of jij het in je hebt om een zaak op te lossen in een wereld vol uitdagingen. Licensed to the public under http://creativecommons.org/licenses/by/4.0 about this event: https://pretalx.hackerhotel.nl/2025/talk/DMAMKD/

In this talk I will show you the theory behind parametric arrays what is involved in making your own low-cost directional speaker Parametric speakers are extremely directional speakers that produce audible sound by modulating an audible signal on top of an ultrasonic carrier. Commercial options have existed for a long time but are quite expensive for hobbyists. Licensed to the public under http://creativecommons.org/licenses/by/4.0 about this event: https://pretalx.hackerhotel.nl/2025/talk/9V7W9G/

What is an LLM? Can you run it yourself? Can you hack it? This session will explain high-level how an LLM works, how you can run this yourself (maybe for privacy reasons), Coding with LLMs and the hacking possibilities of these AI systems. Expect many demos and hopefully useful tips and tricks, so you can directly try all this stuff out yourself. Keyword: Supervised Learning and Reenforced Learning, Hugging Face, Quantization, Ollama, open-webui, Prompt Hacking, Tokens, Context Length I will explain basics of Machine Learning concepts How these ML concepts have created LLMs and how they somewhat work What is needed to run LLMs (Inference) and how you can run it your self how to test various LLMs prompt hacking using LLMs for coding Many live demos Licensed to the public under http://creativecommons.org/licenses/by/4.0 about this event: https://pretalx.hackerhotel.nl/2025/talk/GR78YQ/

It's one thing to plan a vacation trip to Cancun if you have a Dutch passport. It's entirely another to find a way to safety if you have an Egyptian passport. It's one thing to plan a vacation trip to Cancun if you have a Dutch passport. It's entirely another to find a way to safety if you have an Egyptian passport. We are experts in moving people to places that various governments would rather we didn't. The global immigration, customs, and travel system is an absolutely massive technological and human system designed to make sure things happen according to the government's agenda. We have our own agenda, and it all makes for great hacking potential. Insert clever engineering, some interesting math, more than a bit of skullduggery, and you end up with our routing system and what we humbly suggest is an epic hack for a life saving purpose. Licensed to the public under http://creativecommons.org/licenses/by/4.0 about this event: https://pretalx.hackerhotel.nl/2025/talk/9ZGMCC/

The Dutch Tax and Customs Administration deals with criminals claiming to be representatives of the organization and contacting the public with phishing emails daily. In this presentation, we will take you into the world of the criminals sending phishing emails and the recipients of the phishing mail. A live phishing demo is included. This presentation will show several examples of daily phishing that the Dutch Tax and Customs Administration deals with. The Dutch Tax and Customs Administration receives over 60,000 reports of phishing every year. The second part of the presentation includes a live demo of a phishing panel. Using a phishing panel ensures the phishing victim pays for purchasing a 75" OLED TV without knowing it. The TV is delivered to the cybercriminal's address. All of this is live on stage. Licensed to the public under http://creativecommons.org/licenses/by/4.0 about this event: https://pretalx.hackerhotel.nl/2025/talk/KT8ZGY/

Onaangekondigde Persconferentie by Hackerhotel 2025 - Licensed to the public under http://creativecommons.org/licenses/by/4.0 about this event: -

Sociale constructen gebruikt in software context en alles wat daar entertainment mee maakt :) Een interactieve presentatie over waarom beperkingen op je dataset zetten onhandig is. Wat is data? Hoe lang duurt een dag? Hoe lang duurt een uur? Hoe lang is een maand? Wat is een jaartal? Wat is een geboortedatum? Wat is een naam? Hoe lang is een pincode? Waaruit bestaat een pincode? Hoe veilig is een private key? Wat zijn mooie ronde getallen? Hoe groot is een bit? Hoe groot is een byte? Waarom zou je sorteren op afmeting? Licensed to the public under http://creativecommons.org/licenses/by/4.0 about this event: https://pretalx.hackerhotel.nl/2025/talk/UHZ3EJ/

The summary that's fun for both outsiders and insiders of this gem of a genre. Talk is in Dutch :) I wanted to do another talk, but Hacker Hotel decided to sell branded bomber jacks, which forced my hand as this conference then also needs the talk that goes along with those jackets. During the talk we'll listen to the evolution of a genre using samples and watch some video clips. The talk will provide background about the scene: from art to cheese. There will also be some tech about "how it's made", but mostly pointers. This talk is __**TOTALLY NOT INTENDED AS**__ a gateway into a permanent desire to listen to distorted and grainy audio. This talk mostly focusing on fun and interesting stuff, but due to the inherent nature of hardcore music there might (=guarantee) be references to sex, drugs, violence, profanity, recklessness and spooky scary skeletons in the first ten seconds. This talk is not for all ages and minds. So there you have it: licensing AND content AND audience problems galore in just one submission! This is finally giving the hacker hotel producers the missing challenge that they have been searching for all these years. PS1: If you like this talk in advance, please get in touch if you'd like to add or validate things: it's pretty hard it compress 33.333 years into an hour. PS2: Maybe we'll also do the accompanying dance afterwards, who knows, i'm not really good at it but i know some of you are. Licensed to the public under http://creativecommons.org/licenses/by/4.0 about this event: https://pretalx.hackerhotel.nl/2025/talk/UPGVLX/

Frank talks about AI, why it all of a sudden is everywhere and what it means. The keynotes of the likes of Microsoft, Google and Apple can all be summarized in 10 words: “A.I., A.I., A.I., Large Language Model, A.I., A.I., GPT, A.I. …“, so no doubt artificial intelligence holds a promise for the future. But what promise? Will A.I. save use or doom us? Or is it too soon to tell? With the invention of the car, the car accident, vehicle man slaughter and the getaway car were also invented, as well as the police car and motorized ambulances. How does this apply to artificial intelligence? What is the current state of A.I., what does it mean to our perception of the truth, and can it help us make the world more secure? How do classical security measures apply to the A.I. world, where do they fall short, and can we expect new or improved measures with the help of A.I.? Spoiler: yes, they do, and yes, we can. In this talk, Frank will look at the A.I. wave from his unique and down to earth perspective. And hopefully you will walk away with a better understanding of AI in the context of (cyber) security. Licensed to the public under http://creativecommons.org/licenses/by/4.0 about this event: https://pretalx.hackerhotel.nl/2025/talk/U7W3YQ/

I spent the past 6 years restoring and upgrading the 2 flights of stairs in my almost 100 years old house in my off time, taking into them into the 21st century while I was at it. The result is a standalone extensible system that supports an unlimited number of sensors and can light up to 256 cheap LED strips on a setup that can run completely off of a simple USB power bank for days and costs under about €40 in parts. Come watch this talk if you want to hear me nerd out for an hour and go deep into the challenges and lessons learned, new skills unlocked and how I wrote a ridiculous Timeline based custom Animation Engine in JavaScript that can render it's output as either PWM or CSS animations to run the whole thing and make it do what I envisioned. This talk goes from 3D design and printing to Arduino/Esp32 IOT hardware, software and programming, woodworking and heavy construction to how I finally used Claude to take it to the final iteration and a public release. Licensed to the public under http://creativecommons.org/licenses/by/4.0 about this event: https://pretalx.hackerhotel.nl/2025/talk/YNQQN7/