Welcome, hackers of all ages.
Registration for the 2020 quals is open!
register | info
Who are we?
We are the Order of the Overflow. We are the current host of DEF CON CTF (Quals and Finals). Read about our philosophy here or reach us at team@oooverflow.io.
Follow @oooverflow on Twitter for updates!
DEF CON CTFs
- DEF CON CTF 2020 Quals –> May 16 UTC + prequals
- DEF CON CTF 2019 Finals
- DEF CON CTF 2019 Quals
- DEF CON CTF 2018 Finals
- DEF CON CTF 2018 Quals
Public Sources
We owe thanks to many people -- some are listed here