Registration for 2015 Qualifiers is Open!

Grab ∞ of your leetest friends and get ready for DEF CON CTF qualifications. We're building another great game for you this year, with brain-destroying binaries, super-sick shellcode shenanigans, and challenging fun for you. Register yourself, create or join a team, and get your affairs in order for DEF CON CTF 2015.

Register for DEF CON 23 Capture the Flag qualifiers at or by clicking here.