Why do you need a KVL to load a key into a radio? Why isn't it so that you could just enter a 16 digit hax key in the CPS and the radio would encrypt from there? The only thing I can think of is that hardware use and not software is more secure. There is a hell of a lot of electronics in a KVL. What in the world does it do?! Obliviously just enter a key into the radio. That's its only function.