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OOO --- DEF CON CTF

Welcome, hackers of all ages.

The call for 2021 prequalifiers is out!


Also, we launched a playable archive of our past challenges! See you on archive.ooo (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 us and our philosophy here or reach us at team@oooverflow.io.

Follow @oooverflow on Twitter for updates!

DEF CON CTFs

Public Sources

github/o-o-overflow

We owe thanks to many people -- some are listed here