Mar
20

0CTF 2017 Quals – OneTimePad 1 and 2

I swear that the safest cryptosystem is used to encrypt the secret! oneTimePad.zip Well, maybe the previous one is too simple. So I designed the ultimate one to protect the top secret! oneTimePad2.zip Summary: breaking a linear and an LCG-style exponential PRNGs.

Jan
08

GitS 2012 Teaser AL’s Revenge

Category: reverse, crypto Summary: LLVM bytecode with polynomial inversion file