Auvergn'Hack 2025 challenges writeups
VERY EASY
One Liner
Steganography : TXT comparison
VERY EASY
Planet of Apes
Cryptography : Caesar Cipher
EASY
Roxxor 1/3
OSINT : Username lookup, Github commit history
EASY
Sifaka
Misc : inverse Fourier transform, audio file
MEDIUM
Roxxor 2/3
OSINT : Information Gathering, Github email retrieve
MEDIUM
The Wild Forest
Cryptography : zip, Plain-text attack