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Capture the Signal (CTS) takes part at USA Con!

CTS is a challenge-based CTF that focuses exclusively on the reverse engineering of radio signals, aka "blind signal analysis" as the signals' specification are unknown to the attacker.

Contestants should use their RF-hacking kung-fu and tools like GNURadio, GQRX, URH, Python, C, anything, to examine a series of increasingly complex radio signals to extract key information leading them to the final, exit signal. The game runs virtually, the radio signals will be distributed "over IP" where each radio signal corresponds to a challenge. Challenges are sorted by difficulty; each solved challenge gives access to the next one.

For more info and rules:

CTF events

Capture the Signal CTF 20210.00