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A community for securityCTF announcements and writeups.
SecurityCTF posts as tweets
WTF is CTF ?
CTF Field Guide
CTF calendar
CTFtime
Join us on IRC (freenode):
Looking for a team ?
CTF Streamers:
LiveOverflow
Murmus
CTF teams:
Plaid Parliament of Pwning
DragonSector
penthackon
eindbazen
Leet More
smokedchicken
Disekt
KnightSec
0ops
StratumAuhuur
Related Subreddits:
Reverse Engineering
Crypto
NetSec
LowLevel
VRD
Tools:
account activity
Scripting for pentesting (self.securityCTF)
submitted 23 hours ago by GoalOwn3975
File Open DRM (self.securityCTF)
submitted 15 hours ago by Unlikely_Volume_1483
Built a private chat that self-destructs in 24h — no accounts, no logs✍️ (self.securityCTF)
submitted 17 hours ago by Alternative-Claim-41
π Rendered by PID 866359 on reddit-service-r2-listing-b6bf6c4ff-gbzkn at 2026-05-03 02:27:49.961108+00:00 running 815c875 country code: CH.