Oct
03

TUM CTF 2016 – Shaman (Crypto 500)

Oh great shaman! Somehow the village idiot got his hands on this fancy control machine controlling things. Obviously, we also want to control things (who wouldn’t?), so we reverse-engineered the code. Unfortunately, the machine is cryptographically protected against misuse. Could you please maybe spend a few seconds of your inestimably valuable time to break that… Continue reading »

May
01

PlaidCTF 2012 – Nuclear Launch Detected [150] (Password Guessing)

Our spies intercepted communications and a file between 5 of the top 10 robo-generals and their nuclear bomb server. We must recover the final launch code from the 5 robo-general’s secret codes, so we can stop the detonation! Summary: Shamir’s Secret Sharing