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DEF CON CTF 2021 will run Friday August 6th through Sunday 8th (10 AM - 8 PM Friday and Saturday, 10 AM - 2 PM on Sunday, Vegas time).

DEF CON CTF, like the rest of the DEF CON 29, will be hybrid. Players are welcome to join (part of) the Order in Vegas, but the infrastructure and challenges will live 100% on the internet. We’re taking pains to make sure that teams on-site have no advantage over online teams. We would love to see all of you, but it’s still a crazy time around the world, so we’ll accommodate those that can’t (or don’t feel comfortable) making the trip.

From our qualification round and the pre-qualifiers events, these 16 teams emerged as DEF CON 29 CTF finalists:

DiceGang             [via pwn2win]
HITCON ⚔️ Balsn
Katzebin             [winner of DEF CON CTF 2020 as A*0*E]
pasten               [via hxp CTF]
Plaid Parliament of Pwning
Perfect ⚔️ Guesser    [via HITCON CTF + PlaidCTF (!)]
Tea Deliverers

Stay tuned for updates.

Pre-game Team Communications

Games? You want games, I'll give you games. The Master Control Program
has chosen you to serve your system on the Game Grid. If you fail to
obey commands, you will be subject to immediate de-resolution. Order
of the Overflow will see you in Vegas. Important information is below.

What: Before you can get into DEF CON, you must provide an original,
signed, vaccination card, with the final COVID-19 vaccination dose
dated no later than July 22nd, 2021. Once this is verified, you’ll
receive a wristband that must be worn at all times while in DEF CON.
More info can be found here:

Badge Pickup: Thursday, August 5th, 9:00 – 10:00am.

Capture the Flag Hours (all times local to Las Vegas):

- Fri, Aug 6, 10am-8pm, set up begins at 9am
- Sat, Aug 7, 10am-8pm, set up begins at 9am
- Sun, Aug 8, 10am-2pm, set up begins at 9am

Discord: Plan on it, even in Vegas.


<Any question about DEF CON’s COVID vaccination check>

COVID vaccination checks are completely out of our hands, and we’re not involved in any way, so we cannot answer questions about it. The rules are the same for CTF players as it is for DEF CON attendees, so we cannot give you advice about it or answer questions. Please see the information provided from DEF CON about COVID vaccination requirements.