Mar
07

Boston Key Party CTF 2016 – Feistel (Crypto 5pts)

feistel – 5 – 15 solves : crypto: I just made a brand new cipher! Can you recover the key? 52.86.232.163:32785 feistel.go Summary: slide with a twist attack

Apr
20

PlaidCTF 2014 wheeeee writeup

Although it seems like The Plague’s messaging service is secure, there are bound to be bugs in any 20th century crypto system. We’ve recovered a version of the block cipher The Plague implemented. Use their online encryptor tool, at 54.82.75.29:8193, to break the cipher and figure out Plague’s secret plans. NOTE: When the service sends… Continue reading »

Feb
13

IFSF CTF Small Challenges (#4, #5, #6, #14, #15)

Contents #4 ER #5 Change #6 Call me #14 Seek me #15 Embedded docs

Mar
07

Codegate CTF 2011 Mini writeups

Some mini writeups on Codegate 2011 Prequals: Issue100,200, Net100,200, Crypto100,200.