[dogcow]

Not really true on modern digital radio systems. They are AES-256, but the voice frames are encrypted right after the vocoder does its thing, then the voice data is dropped into the stream just as if it were clear voice. It's all wrapped in the same same digital protocol (like P25 or numerous others), so the signal is very distinct in that encrypted and clear communications both sound the same to someone listening to the raw audio.

[lazide]

aka framing. which is literally why I wrote that.