Stötte på The Conet Project – En märklig samling inspelningar från kortvågsradio, så kallade Number Stations:
Shortwave Numbers Stations are a perfect method of anonymous, one way communication. Spies located anywhere in the world can be communicated to by their masters via small, locally available, and unmodified Shortwave receivers. The encryption system used by Numbers Stations, known as a ?one time pad??? is unbreakable.