First, someone would be able to prove that communication is happening. Second, if the keys are stored locally, and the original packets saved, the encryption can be reverse engineered.

Encryption prevents man in the middle attacks. If you have one of the ends, you can usually get the data. If you have the device that’s doing the encryption of the data, and you have the encrypted data, you can decode the data. It’s just a matter of getting through obfuscation at that point.

The reason this hasn’t been done yet is that it’s not happening yet. CMG was lying in their advertising.