Chaos Computer Club - archive feed

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/

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/

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/

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/

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/

In The Netherlands, everyone can trust the outcome of elections. That is our mission as The Dutch electoral council. But you don't have to trust us to be able to trust the outcome of elections. Anyone can verify the results and in this presentation, we aim to explain to you which security measures have been taken in the election process here in The Netherlands to make sure you can trust the outcome of our elections, without having to trust us. On average, we have one election each year. But not everyone knows how elections in our country are protected against security risks. We know we don't use voting machines anymore, but we do use software. We are currently working on new software. In this presentation you will learn: - Why the software we use doesn't have to be able to resist every type of "cyber" attack. - How voters can verify the results of elections either physically or from the comfort of their computer from home. - Why voting machines or internet voting are not currently a real alternative worth considering. Licensed to the public under http://creativecommons.org/licenses/by/4.0 about this event: https://pretalx.hackerhotel.nl/2025/talk/DHTDEM/

This talk delves into the technical aspects of the Tanmatsu hardware design, the latest creation by the badge team, set to be released alongside the availability of ESP32-P4 chips. It will also form the foundation for the WHY2025 badge. Topics include an exploration of the PCB's high-level design, cost considerations for producing 4000 units, challenges and insights from working with pre-release chip prototypes, and a discussion on the practical aspects of MIPI DSI/SCI interfaces, including LVDS and impedance. The session will share both the hurdles and triumphs encountered during the design process. A talk about the technical aspects of the hardware design of the latest hardware design created by badge team. The Tanmatsu hardware design is finished, and will be available for the community as soon as the ESP32-P4 chips are available. The design will also be the bases for the WHY2025 badge. In this talk we'll take a deep dive into developing a badge project in a neurodiverse community: - PCB high level design - Cost considerations when designing a 4000x PCB - Some horror and beauty on the design path - MIPI DSI/SCI (LVDS, multi layer, impedance and clearance) - Mass production considerations Licensed to the public under http://creativecommons.org/licenses/by/4.0 about this event: https://pretalx.hackerhotel.nl/2025/talk/G79YRC/

Meshtastic and LoRa, what is it and what can you do with it? LoRa, or Long Range radio, is a technology that operates on freely available frequency bands. Thanks to its unique way of transmitting and receiving signals, it’s not only remarkably resistant to noise but also capable of bridging impressive distances with very little power. One of the most exciting applications making waves is Meshtastic. But what exactly is Meshtastic, and how does the mysterious Hackerhotel bridge play into the picture? Licensed to the public under http://creativecommons.org/licenses/by/4.0 about this event: https://pretalx.hackerhotel.nl/2025/talk/33SUDX/

De geschiedenis en toekomst van de nederlandse hackercamps Kom mee door deze geschiedenis les ter voorbereiding van het jubuleum kamp, WHY2025! Licensed to the public under http://creativecommons.org/licenses/by/4.0 about this event: https://pretalx.hackerhotel.nl/2025/talk/NCKS3X/

CubeSats are small satellites comprised of 10x10x10cm "units" and range in size from very small 1U or smaller PocketQubes to 24U beasts. What can be done with such a platform and why? CubeSats are small satellites comprised of 10x10x10cm "units" and range in size from very small 1U or smaller PocketQubes to 24U beasts. What can be done with such a platform and why? I will go in to a brief history as well as some applications with examples. The goal is to keep this talk TLP:Clear Licensed to the public under http://creativecommons.org/licenses/by/4.0 about this event: https://pretalx.hackerhotel.nl/2025/talk/QTVJFY/

Since the start of the war, our community has risen to help friends in Ukraine in many different ways. Roman Kniaziev is coming over from Kharkiv to explain how he works with all the volunteers of ETOC to support his country. Even though the news can be overwhelming, everyone can help. This talk shows you how. The IT community in Kharkiv is doing their best to help their city and country to counter the effects of the invasion and war. Roman Kniaziev comes over from Kharkiv to explain how, together with all the volunteers of ETOC he tries to help out. We are helping him, with all kinds of humanitarian support through our foundation Aid to Ukraine (https://aidtoukraine.nl). The war has shown us there is something to do for everyone, that it is useful and well received. The war still rages and help is always welcome. This talk will show you what has happened last year and how we all can help Ukraine during this horrible time. Licensed to the public under http://creativecommons.org/licenses/by/4.0 about this event: https://pretalx.hackerhotel.nl/2025/talk/QD8VRX/

The total number of vulnerabilities continues to rise. If we had to rely on just CVSS for prioritizing those vulnerabilities, we have an enormous hard time to remediate all of them. In this talk, we’ll explore the critical gaps in CVSS-based prioritization and discuss why factors like exploitability, asset criticality, and real-time threat intelligence are way more important. Expect real-world examples, a touch of humor, and actionable insights to help you move beyond the CVSS score and toward a smarter, risk-based approach to vulnerability management. Because let’s face it: a CVSS 7 can be way more critical to your organization then a CVSS 9! Licensed to the public under http://creativecommons.org/licenses/by/4.0 about this event: https://pretalx.hackerhotel.nl/2025/talk/DHNUWQ/

With the support of the Dutch embassy in Tokyo, I have researched Coordinated Vulnerability Disclosure (CVD) in Japan for DIVD. Japan’s governmental policy on CVD dates back to 2004. Although Japanese criminal law and jurisprudence do not allow for large-scale intrusive vulnerability research and disclosure, Japanese institutes help citizens disclose zero days to vendors and report vulnerabilities to website operators. Also, the Nation Institute for Information Communication Technology scans and notifies vulnerable IoT, and the Japanese government has adjusted laws to allow this. With the support of the Dutch embassy in Tokyo, I have researched Coordinated Vulnerability Disclosure (CVD) in Japan for the Dutch Institute for Vulnerability Disclosure. Key findings: Japan’s governmental policy on CVD dates back to 2004. The Japanese Computer Emergency Response Team Coordination Center (JPCERT/CC) is an independent institute founded in 1996 and currently funded by METI. The center handles incidents, analyses and shares information on online threats, monitors internet traffic, and has published Vulnerability Notes with Advisories since 2004. Japanese criminal law and jurisprudence do not allow for large-scale intrusive vulnerability research and disclosure as Dutch case law does. In Japan, doing CVD on a broader scope and without informed consent is perceived as very rare. Security researchers generally fear prosecution as they may violate cyber security and privacy laws. A common statement at hacker events was: “I only report if they provide a bug bounty.” Japanese institutes help citizens disclose zero days to vendors and report vulnerabilities to website operators. Organizations like IPA and JPCERT/CC provide structured processes for reporting vulnerabilities, focusing primarily on zero days affecting software or websites widely used in Japan. These reports are forwarded to vendors and operators, though researchers must navigate strict conditions. The Nation institute for Information Communition Technology scans and notifies vulnerable IoT, and the Japanese government has adjusted laws to allow this. The NOTICE project aims to prevent cyber-attacks by scanning IoT devices on weak passwords by attempting to log in. These activities run parallel to the Handling Regulations for Information Related to Vulnerabilities in Software Products and clearly violate cyber security laws. In order to proceed on this endeavor, the Cabinet overruled the Act on Prohibition of Unauthorized Computer Access by a special law, which provided NICT the mandate. To my knowledge, this is unique in the world. Licensed to the public under http://creativecommons.org/licenses/by/4.0 about this event: https://pretalx.hackerhotel.nl/2025/talk/GEVFSR/

This workshop is especially for all attendants who are not Dutch natives. In an exact and logical manner I will guide you through the syntax and semantics of the Dutch language, from sounds (the famous 'ggh' and vowel inventory) to gender of nouns and word order. There will be simple illustrations to help you get a grip on the language and bluff your way into pub talk with locals. Please bring pen and paper for the old school school experience! I am a Dutch native teacher <i>Dutch as a second language</i>, with experience teaching expats. My background in general linguistics and artificial intelligence as well as participating in the hackers' community enables me to present a language workshop tailored for hackers. In fact, as a teacher for a a general audience I must refrain myself from being too "logical, analytical or just plain geeky" to keep all students happy. In this workshop I will focus on: * providing structure of the Dutch language, similar to how you would explain a programming language, showing the regularities that are present * giving small examples of words as well as expressions and grammatical rules to show a more specific idea of Dutch * interaction: exercises, individually and in groups, puzzle-like, but also speaking exercises (this is always a tough one, so we'll try) * concrete focus will be on gender of nouns: the article "the" in English can be "de" or "het" in Dutch, depending on the gender. Some grammar (demonstratives, adjectives) depends on this gender, following small yet counterintuitive rules * have fun: I will present weird exceptions, false friends and we will also listen to and analyze a Dutch song Licensed to the public under http://creativecommons.org/licenses/by/4.0 about this event: https://pretalx.hackerhotel.nl/2025/talk/NZZUQV/

The Election Council is working on Abacus, the tabulation software for the elections. Come to this workshop to try your hands on the software in a production-like setting and learn more about the choices and concepts behind it. The Election Council is working on Abacus, the tabulation software for the elections. This workshop will show you how it works, in a production style setting involving test data. After all the counting we take a tour through the GitHub repo (https://github.com/kiesraad/abacus), explain the architecture and choices behind the project so far. Come to this workshop if you are interested in the Dutch Elections and want to understand the actual process, learn about the software development that is being done and ask everything you always wanted to know. Do visit the presentation by Fleur van Leusden, our CISO. Licensed to the public under http://creativecommons.org/licenses/by/4.0 about this event: https://pretalx.hackerhotel.nl/2025/talk/7YBMR3/

This talk describes the computer and its interfaces the DSKY (DiSplay-KeYboard) on board the Apollo missions that got us to the moon and back. I will point out several modern sources of information about this historical project and how it entertains lots of people to this day, including several emulation projects. Back in the period 1962 to 1969 the US went on a mission to get people on the moon. This talk describes the computer and its interfaces the DSKY (DiSplay-KeYboard) that were used during that time on board the Apollo missions that got us to the moon and back. I will point out several modern sources of information about this historical project and how it entertains lots of people to this day, including several emulation projects. Licensed to the public under http://creativecommons.org/licenses/by/4.0 about this event: https://pretalx.hackerhotel.nl/2025/talk/B7GZJY/

"AiTM: Lessons Learned" dives into the evolving threat of AiTM attacks. Our presentation highlights the transition from basic phishing tactics to sophisticated methods that compromise organizational security. The presentation outlines the journey from oldschool phishing attacks, to phishing framework like UADMIN, and the introduction of tools like Evilginx. And now the SaaS providers allowing anyone to buy access to an AiTM platform. We give an insight into a popular AiTM SaaS platform and the revenue stream hosting such software creates. The session ends by outlining common techniques to prevent these types of attacks. Most organizations use M365 and experience attacks using AITM to bypass MFA. At the same time SaaS providers are building AITM services that allow targeteted attacks allowing for supply chain attacks (AITM targeted against admin sites for: pypi, npmjs and rubygems). At the same time used for very specific scams for example against booking.com. Attackers use the booking.com hotel login to extract creditcard information for upcomming hotel guests. There's been an uprising in the amount of AITM based attacks. BEC fraud operators use it as MFA is more and more common. But the apearance of SaaS providers in the AITM space make these attacks easier to perform and therefore making them more common. Booking.com has been a popular target allowing attackers to use the hotel operator login to phish creditcards by sending upcomming guests reminders to pay. The fact that these reminders are sent via the booking.com app makes them super trustworthy. At the same time environments such as M365/EntraID are popular targets for other operators. This past year we've been trying to prevent and detect these types of attacks. The goal of the presentation is make attendees aware of the risks, the different operators and types of attacks happening today. outline: 1) What is AiTM/BITB 1.1) Phishing history 1.2) Old school phish 1.3) Introduction of commong framework (UADMIN, opwelk, haiku) 1.4) Evilginx 1.5) AiTM SaaS providers 2) How to detect phishes 2.1) The concept 2.2) What we have built - didsomeoneclone.me 2.3) Then came the Microsoft idea 2.4) Gaining insight into the amount of phishes 3) Fingerprint tool 3.1) The goal 3.2) How does it work? 3.3) Adding certificate transparency to preempt attacks 3.4) Outcome and statistics 4) What we see 4.1) How often does it actually occur? 4.2) Different actors. Example.com. Evilginx Rick Roll, MSPHP 4.3) Microsoft sandbox also visits the URLs and they come in 4.4) How quickly is Evilginx taken down 5) actors 5.1) various offers 5.2) actor revenue 6) Future work 6.1) automatically finding victims in our EDR tooling 6.2) Attempts at improvement - CSS exfil. 6.3) Roadmap Licensed to the public under http://creativecommons.org/licenses/by/4.0 about this event: https://pretalx.hackerhotel.nl/2025/talk/WYLJK3/

I have been struggling with my weight for over 25 years. After reading the book : The Obesity Code" everything clicked. Since I have lost 13 kg within 6 months. The great thing about this is that it is effortless. In this workshop we start with the theory of gaining and loosing weight. After that we are going to look at recipes for individual participants. What works, what doesn't. In the end you will know what should work for you, and how you can loose weight effortlessly. I have been struggling with my weight for over 25 years. After reading the book : The Obesity Code" everything clicked. Since I have lost 13 lg within 6 months. The great thing about this is that it is effortless. In this workshop we start with the theory of gaining and loosing weight. After that we are going to look at recipes for individual participants. What works, what doesn't. In the end you will know what should work for you, and how you can loose weight effortlessly. Licensed to the public under http://creativecommons.org/licenses/by/4.0 about this event: https://pretalx.hackerhotel.nl/2025/talk/HPGGPC/

How to use screenreaders to scan the operatingsystem, building blocks of an application or web-enviroment. How to use screenreaders to scan the operatingsystem, building blocks of an application or web-enviroment. Other topics are: * Reading and analysing logging * Capture a scrolling text * Query of classes etc Licensed to the public under http://creativecommons.org/licenses/by/4.0 about this event: https://pretalx.hackerhotel.nl/2025/talk/AXL9WT/

De opkomst van geavanceerde technologie en kunstmatige intelligentie heeft ongekende mogelijkheden gecreëerd, maar ook een sluimerend probleem blootgelegd: de validatiecrisis. In deze lezing neemt Brenno de Winter, gerenommeerd cybersecurity-expert en auteur van De Validatiecrisis, u mee in de wereld van misleidende aannames, ongeteste technologie, en de gevaren van een gebrek aan kritische evaluatie. Hij toont aan hoe deze crisis niet alleen technologie, maar ook maatschappelijke besluitvorming ondermijnt. Een belangrijk deel van de lezing is gewijd aan de MIAUW-methodiek (Methodiek voor Informatiebeveiligingsonderzoek met Auditwaarde). Dit gestructureerde framework biedt een oplossing voor de validatiecrisis in informatiebeveiliging door de nadruk te leggen op reproduceerbaarheid, transparantie en auditwaarde. MIAUW stelt organisaties in staat om kwetsbaarheden niet alleen te identificeren, maar ook te documenteren op een manier die zowel controleerbaar als bruikbaar is voor bredere compliance- en risicomanagementstrategieën. Tijdens de lezing bespreekt Brenno de Winter praktische voorbeelden, biedt hij concrete handvatten om kritisch denken te bevorderen, en illustreert hij hoe MIAUW organisaties kan helpen de kloof tussen complexe technologie en verantwoorde toepassing te overbruggen. Technologie en kunstmatige intelligentie hebben onze samenleving fundamenteel veranderd, maar brengen ook een diepe uitdaging met zich mee: de validatiecrisis. In deze lezing onthult Brenno de Winter, cybersecurity-expert en auteur van De Validatiecrisis, hoe een gebrek aan kritische controle en grondige evaluatie van data en technologieën leidt tot risico’s op het gebied van veiligheid, ethiek en besluitvorming. De validatiecrisis is een fenomeen dat zich niet alleen in de echte wereld afspeelt, maar zelfs in fictieve experimenten fascinerende en leerzame inzichten biedt. De Validatiecrisis: Wat Gaat Er Mis? De validatiecrisis is een fundamenteel probleem waarbij aannames en technologieën zonder grondige controle worden geaccepteerd. Dit leidt tot mislukte projecten, gebrekkige AI-systemen en besluitvorming gebaseerd op onjuiste gegevens. De Winter illustreert dit met praktijkvoorbeelden, waaronder AI-modellen die falen in het herkennen van nuance, en situaties waarin vertrouwen in onbewezen technologie desastreuze gevolgen heeft. Hij legt de nadruk op het belang van kritische evaluatie en hoe een gebrek daaraan leidt tot blinde vlekken in onze technologische ontwikkeling. Een Lessenpakket van de Maan Een belangrijk onderdeel van de lezing zijn de fictieve experimenten op de maan, waarin menselijke en technologische interacties werden onderzocht in een context waar katten een sleutelrol spelen. In deze hypothetische samenleving, waar katten niet alleen huisdieren maar politieke actoren zijn, faalden AI-systemen in het begrijpen van de complexe hiërarchieën en sociale dynamiek. Dit leidde tot een fictieve oorlog met de planeet Bananie, die volledig had kunnen worden voorkomen als technologie op een grondigere manier gevalideerd was. De experimenten fungeren als een metafoor voor de gevaren van slecht gevalideerde technologieën. Ze tonen hoe kleine fouten in de basis van systemen kunnen leiden tot grote gevolgen, of het nu gaat om ethische kwesties, veiligheid of zelfs internationale relaties. Dit fictieve voorbeeld onderstreept de bredere boodschap: technologie moet niet blind worden vertrouwd, maar moet voortdurend worden getest en gecontroleerd. De MIAUW-methodiek: Een Gestructureerde Aanpak Als antwoord op de validatiecrisis presenteert De Winter de MIAUW-methodiek (Methodiek voor Informatiebeveiligingsonderzoek met Auditwaarde). Dit framework biedt een gestructureerde aanpak voor penetratietesten die niet alleen technische kwetsbaarheden identificeert, maar deze ook documenteert op een manier die reproduceerbaar en controleerbaar is. MIAUW stelt organisaties in staat om niet alleen inzicht te krijgen in risico’s, maar ook om deze te verbinden aan bredere compliance- en risicomanagementstrategieën. Met concrete voorbeelden laat De Winter zien hoe MIAUW organisaties helpt om niet alleen veiliger te worden, maar ook om transparant en verantwoord om te gaan met hun technologie. Door reproduceerbare resultaten en sterke auditwaarde mogelijk te maken, biedt MIAUW een praktische oplossing voor de uitdagingen van moderne technologie. Licensed to the public under http://creativecommons.org/licenses/by/4.0 about this event: https://pretalx.hackerhotel.nl/2025/talk/7VXSPZ/

This you really want to know. Huib has been responsibly disclosing the Secret Services, criminals and hackers. Now we turn it around: ask Huib anything. Chris van ‘t Hof will guide the conversation. Books: 2024 “Dit wil je echt niet weten”, 2019 “Het is oorlog en niemand die het ziet”, “There's a War Going On But No One Can See It” - Its war and everyone can see it now. “Der digitale Weltkrieg, den keiner bemerkt” Licensed to the public under http://creativecommons.org/licenses/by/4.0 about this event: https://pretalx.hackerhotel.nl/2025/talk/NBZPQZ/

Openingstalk by Dimitri opening Hackerhotel 2025 In this openingstalk i will open Hackerhotel 2025 and thank all people that helped me and explain about how this Hackerhotel 2025 organisation went. Licensed to the public under http://creativecommons.org/licenses/by/4.0 about this event: https://pretalx.hackerhotel.nl/2025/talk/EMVMAX/