This time the DefCon CTF challenges were really tough. After about 40 hours of straight effort in those 2 days my head was spinning. There were some nice write-ups that people have posted:
Vedagodz’s site is up at : http://shallweplayaga.me/
Pursuits Trivial 400 writeup : http://pastie.org/510841
Binary l33tness 300 writeup : http://hackerschool.org/DefconCTF/17/B300.html (based on k0rupt’s original work)
Crypto badness 400 : http://beist.org/defcon2009/defcon2009_crypto400_solution.txt