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P25 conventional encryption


Premium Subscriber
Mar 19, 2003
Just playing around with AES256 on conventional channels in some APX radios and CPS 16. CPS would not let me encrypt any conventional personality which had talk groups enabled. If I disabled (unchecked TG box) then I could encrypt. Side note: even when unchecked on transmitting radio the receiving radio (Kenwood) displayed it was receiving TG-1. My Kenwood radios don’t appear to have a problem using talk groups and encryption. I say “appear” because I haven’t tested enough to know if Kenwood is encoding/ignoring TG when encryption is used with TG set.


Is it time for Coffee?
Premium Subscriber
Apr 24, 2020
I have not been in APX CPS, but my guess would be you have to encrypt the talkgroup and not the channel.