The concept of encryption (in the radio sense) is to prevent unauthorized listeners from hearing the conversation. The RCMP in BC have decided that the public doesn't need to hear their day-to-day comms and has thus encrypted them.
The only way to decrypt an encrypted signal is to have the software (or hardware, in some cases) key, and a compatible radio - a scanner isn't going to do it. And you are not going to get that key unless you're with the RCMP, unfortunately.
Mathematically, it might be possible to "crack" the encryption code using a bank of extremely powerful computers, but it is neither legal nor feasible in a timely fashion (I forget what kind of timeline it is to decode the "standard" encryption used these days, but it's on the order of weeks, supposedly - no one has ever publicly provided proof of being able to break it). Furthermore, if one code gets cracked, all they will do is change the encryption key - and in most modern systems, you can do that just by transmitting a data burst (called Over The Air Rekeying).
The sad result is: Your RCMP detachment is no longer able to be listened to, period.
