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writeup
Browse 3 writeup posts on 02Labs Blog. CTF writeups, OSINT notes, crypto solves, and systems engineering deep dives.
Daily AlpacaHack - Bloom Crypto Challenge Writeup
Daily AlpacaHack's - Bloom presents us with a One-Time Pad encryption scheme, where every byte of the plaintext is XORed with a cryptographically secure random bit (Generated from os.urandom...
DiceCTF 2026 Crypto Writeup — Carry the Flame
Goal: interact with the remote service, recover the 5-byte secret key used by the cipher, submit it through the guess path, and get the flag.
Batman's kitchen CTF 2026 OSINT Writeup — Eye on the Sky / Eye on the Sky 2
In this OSINT challenge for Batman’s kitchen CTF, we were given a single photo (sky.jpg) containing a mountain and a small aircraft silhouette above it. And 2 tasks were given with this: