The output of good encryption algorithms is indistinguishable from noise. And you can embed noise in anything, like in images, or in audio or video streams. And

The output of good encryption algorithms is indistinguishable from noise. And you can embed noise in anything, like in images, or in audio or video streams. And this is a worst case scenario, assuming the US convinces the whole world to ban encryption, which is highly unlikely. I mean besides the terrorists meeting the old fashioned way, in person.