You not to know I'm hiding anything at all.

Exactly. They may not know what you're hiding, but if they see small portions of your internet traffic are encrypted using a scheme very different from your regular traffic, flags are raised. Then it's simply a matter of sending an NSL to whoever they need to in order to get the content of the message.

>Then it's simply a matter of sending an NSL to whoever they need to in order to get the content of the message.

If its done right, there are only 2 people capable of getting the content of the message: you and the intended recipient.

If the norm was that everybody sent their snailmail on postcards, the ones in envelopes would be suspicious.