[Poohbah]

Per post #12; the FCC has set aside certain bands for Police, Military, Emergency, Rescue and other uses. Using THESE frequencies is a Federal Offense.

So, in an extreme defense emergency, when the military needs some "public" bandwidth for communications, then you're saying that you have a legal right to decrypt the stuff and sell the access to the Chinese.

[Arthalion]

Now, you're arguing two different things:

then you're saying that you have a legal right to decrypt the stuff
Yes you do. If a radio signal passes through your property and strikes your receiver, then there is no reason why you can't record it. Once a signal recorded on YOUR property, intercepted with YOUR antenna, and stored on YOUR storage medium is secured, you have every legal right to look at it and try and figure out what's in it.

and sell the access to the Chinese
Nope, you don't have the right to sell or even GIVE it to anybody. While you have the right to listen to military signals on your property, the fact still exists that the data you're reading is classified and potentially a matter of national security. By distributing that information, you'll be breaking a whole host of laws that have nothing to do with the legal concepts of "radios" and "encryption", and everything to do with concepts like "treason" and "espionage".