DEFCON 6 DEFCON CTF 2017 Quals -- badint May 2, 2017 DEFCON CTF 2017 Quals -- peROPdo May 2, 2017 DEFCON CTF 2015 Quals -- wibbly-wobbly-timey-wimey May 24, 2015 DEFCON CTF 2015 Quals -- catwestern May 24, 2015 DEFCON CTF 2015 Quals -- mathwhiz May 23, 2015 DEFCON CTF 2015 Quals -- r0pbaby May 23, 2015