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How does analog DES encryption work?

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human8472

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Mar 3, 2014
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Some of the older Motorola System Saber radios make use of DES encryption. How does encryption work with an analog signal? Encrypting digital signals seems straight forward but how are analog signals encrypted using DES?
 

mancow

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The radio uses 12 kb CVSD modulation that is encrypted though a removable module. Keys are programmed into the module by way of an external keyloading device that uses the microphone options interface port.
 

tj20

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Dec 18, 2001
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Can they still use pl/dpl when using des? The reason I ask is when our police used des they would not use a pl. it was nice when I figured that out. I would program a pl in the scanner so when they encrypted the scanner would skip the frequency
 
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