Capture the Flag 🚩
Capture the flag (CTF) is a competition where contestants earn points by finding secret messages ("flags") hidden in radio signals. Challenge yourself and improve your GNU Radio skills!
The GRCon 2026 CTF will take place from September 22-24, 2026. You can play in-person in Raleigh, or remotely over the internet.
To get started:
- Read over the rules.
- Coming soon: Join the GRCon26 Capture the Flag Matrix channel.
- Coming soon: Register an account and log in.
Want more CTF?
Check out some of the past competitions, which are still playable: