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NSNull Siryninctfs.hashnode.dev·Dec 9, 2025 · 5 min read

Linearity - Infobahn CTF’25 Crypto Beginner Challenge

~ Written by BIGMONKE Challenge Overview The CTF challenge Linearity presents itself as a beginner-friendly exercise in linear cryptanalysis. The problem drops us into a seemingly simple Python snippet that encrypts a hidden flag using a pseudo-rando...

NSNull Siryninctfs.hashnode.dev·Dec 8, 2025 · 4 min read

Escaping PyJail – Infobahn CTF 2025

Author: GabeG888 Challenge Overview The challenge presents a minimal Python sandbox and asks us a direct question: Can you escape the jail? The task is to send a short Python snippet as input. If that snippet prints more than 500 characters on stdout...