Crypto

GlacierCTF 2025 - AES Zippy

This year, I once again had the opportunity to contribute to Glacier CTF for its fourth edition. The challenge, AES Zippy, is designed for players with intermediate familiarity with cryptography, specifically focusing on AES-GCM.

Glacierctf 2024 - AES Overdrive

I had the pleasure of providing a challenge for the third iteration of the Glacier 2024 event in the crypto category. It is a symmetric encryption challenge that is split into an easier first stage and a more challenging second stage, which revolves around symmetric cryptanalysis to recover a round key of AES.

Google CTF 2023 - myTLS

During the Google CTF 2023, my college and I encountered a fascinating challenge which was TLS themed. The task at hand involved exploiting files writes, hashes and signatures.

AngstromCTF 2023 - Royal Society of Arts 2

Challenge description

RSA strikes strikes strikes strikes strikes again again again again again!

Author: JoshDaBosh

Insomni'hack CTF 2023 - Still counting on you

There was only one crypto challenge at the Insomni’hack CTF 2023, and that was this one. Our application runs on a server, and we have a Python file that shows us how it works.