Comment by WrongOnInternet

Kevin Mitnick figured out how to get around police radio encryption in the 90's. From 'Ghost in the Wires': "Whenever I heard any hiss of communication, I’d hold down my Transmit button. That would send out a radio signal on the same exact frequency, which would jam the signal. Then the second agent wouldn’t be able to hear the first agent’s transmission. After two or three tries back and forth, the agents would get frustrated with the radio. I could imagine one of them saying something like, “Something’s wrong with the radio. Let’s go in the clear.” They’d throw a switch on their radios to take them out of encryption mode, and I’d be able to hear both sides of the conversation! Even today I’m amused to remember how easy it was to work around that encryption without even cracking the code."