forensics
f100
http://sysexit.wordpress.com/2012/06/03/defcon-20-ctf-prequals-2012-forensics-300-writeup/#comments
f200
http://sysexit.wordpress.com/2012/06/03/defcon-20-ctf-prequals-2012-forensics-300-writeup/#comments
f300
http://sysexit.wordpress.com/2012/06/03/defcon-20-ctf-prequals-2012-forensics-300-writeup/
http://research.shell-storm.org/files/research-28-en.php
http://www.blizz.se/dc20_ctf_f300.html
f400
http://www.routards.org/2012/06/defcon-20-quals-forensics-400.html
http://blog.lse.epita.fr/articles/15-defcon2k12-prequals-for400-writeup.html
f500
http://blog.lse.epita.fr/articles/13-defcon2k12-prequals-for500-writeup.html
pwnables
p100
http://pastebin.com/eqzdtwmw
http://blog.lse.epita.fr/articles/17-defcon2k12-prequals-pwn100-writeup.html
p200
http://pastebin.com/hZRjypSH
http://blog.oxff.net/#jmjgjxh7rng7hgjyd7hq
http://pastebin.com/hvAxGMWM
p300
http://blog.oxff.net/#z44b5paapelzyn46rjea
http://blog.lse.epita.fr/articles/14-defcon2k12-prequals-pwn300-writeup.html
p400
http://blog.oxff.net/#anvszwpmjdyizhsqgngq
p500
binary l33tness
b100
http://securityblackswan.blogspot.co.uk/2012/06/defcon-20-ctf-qualifiers-b100.html
http://squidzrus.schleppingsquid.net/wiki/index.php?title=Binary_l33tness_100
b200
http://www.blizz.se/dc20_ctf_quals_bin200.html
b300
http://insight-labs.org/?p=368
b400
http://bit.ly/NyqP7a
http://x-n2o.com/bin400-dc20
b500
/urandom
r100
http://squidzrus.schleppingsquid.net/wiki/index.php?title=Urandom_100
r200
http://devtrixlabs.com/blog/2012/06/defcon-2012-urandom-200-writeup/
r300
http://www.routards.org/2012/06/defcon-20-quals-urandom-300.html
http://blog.sigsegv.in/2012/06/defcon-ctf-quals-2012-urandom-300.html
r400
http://secdef.cs.washington.edu/dc20-quals-urandom-400.html
r500
grab bag
gb100
gb200
http://adversec.com/docs/defcon_ctf_quals_2012_grab_bag_200_writeup.txt
http://www.routards.org/2012/06/defcon-20-quals-grab-bag-200.html
gb300
http://pastie.org/4023158
http://blog.lse.epita.fr/articles/16-defcon2k12-prequals-gb300-writeup.html
www.rajatswarup.com/blog/2012/06/03/defcon-ctf-quals-grabbag-300-writeup/
gb400
http://sysexit.wordpress.com/2012/06/03/defcon-20-ctf-prequals-2012-grab-bag-400-writeup/
http://www.rajatswarup.com/blog/2012/06/03/defcon-ctf-quals-grabbag400-writeup/http://www.rajatswarup.com/blog/2012/06/03/defcon-ctf-quals-grabbag400-writeup/
gb500
