This is still somewhat a work in progress. You can already find my posts and writeups, frequently mirrored from where they were originally published (e.g. on one of the websites of my CTF teams, or the CryptoHack blog). Further improvements to this website, and more information about me and what I do will likely appear at a later point.
An overview of posts per tag can be found here
A list of all posts, grouped per month is here
[GCTF 2022] CyclingJul 05, 2022
Pack out your quantum computer and perform 2^1025-3 encryptions to solve this challenge. Good luck doing this in 48h.
[GCTF 2022] TreeboxJul 04, 2022
I think I finally got Python sandboxing right.
[DiceCTF 2022] TI-1337 Silver EditionFeb 08, 2022
Back in the day the silver edition was the top of the line Texas Instruments calculator, but now the security is looking a little obsolete. Can you break it?
[DiceCTF 2022] TypedFeb 08, 2022
~~Haskell~~ Rust is a dynamically typed, interpreted language. Can you get my code to stop erroring?
[SECCON CTF 2021] Sign WarsDec 13, 2021
A long time ago in a galaxy far, far away....
[Intigriti XSS challenge] May 2021Jun 01, 2021
🤖 Are you a robot? Our intern built this handy captcha to find out!
[ictf Apr 2021] My challengesMay 01, 2021
[ictf Mar 2021] My challengesApr 01, 2021
[ictf Feb 2021] My challengesMar 01, 2021
Factoring in logarithmic time: a mathemagic trickJan 22, 2021
Debunking crackpot claims for fun and profit