Submission + - FCC Considering Proposal for Encrypted Ham Radio (hams.com)
Encryption is a potential disaster for ham radio because it defeats its self-policing nature. If hams can't decode messages, they can't identify if the communication even belongs on ham radio. A potentially worse problem is that encryption destroys the harmless nature of Amateur radio.There's no reason for governments to believe that encrypted communications are harmless.
See http://hams.com/encryption/ for more information.