I might be a few months late, but I finally found some time to publish my "magnetic_tape" crypto challenge from #NullCon #Berlin #HackIM #CTF 2025:

https://github.com/OOTS/magnetic_tape

I included the source code (was published anyway during the CTF), my own solution, my own #writeup, and some internal files (#Dockerfile, docker-compose, minimal #python #unittests).

Also: #NullCon #Goa #HackIM #CTF 2026 is happening in a few days: https://ctf.nullcon.net
Go check it out!

RT @[email protected]

Write-up for Proton (Web-500) hosted by @[email protected] 's hackim CTF 2019, solved by 3 teams total. 😉

Dive into the 'physics' of MongoDB's ObjectID abuse + Prototype Pollution

https://aadityapurani.com/2019/02/03/hackim-nullcon-ctf-2019-proton/

#ctf #hackim #nullcon #hackim19

🐦🔗: https://twitter.com/aaditya_purani/status/1092120541488693248