Radio Release Keys
Radio Release Keys (RRKs) are a type of encryption key used by the US military to securely transmit across radio systems. The RRK algorithm was developed by the US National Security Agency and can be used to encrypt voice, data, and other types of communication. The concept behind the RRK is to create a randomly generated and unique code for each communication that is not easily guessed. The messages are encrypted using the RRK and require decryption with a matching key in order to be understood.