Phase II and simulcast limit your options regarding which scanners will receive them. There are a number of scanners that receive P25 Phase II, but only the SDS100 and SDS200 will reliably handle simulcast.
Encryption is an entirely different thing, if that happens, you are 100% SOL. No scanner has the capability to decrypt, even if you have the correct key. You'd need an authorized system radio, the key, and of course permission to use it. Unauthorized transmit-capable radios can be bricked by an over-the-air command if they are detected on a system.