Registration is first come first served with a neighborly touch: you can play from anywhere at DEF CON.
We will be running a Jeopardy-style scoreboard.
Hack our service by writing a custom exploit.
Cryptanalyze a ciphertext or a key system.
Find vulnerabilities in the Internet's fondest protocol.
Find a flag hidden in a binary.
We trust you will find our pricing beats the CTF industry avg()!
We will not accept your questions or comments via the below form. Send us e-mail at openctf at neg9 dot org