That was my point, there is no plausible deniability. Your cleaned-up data just happens to be the png image of some secret US bases? Good luck convincing a judg

That was my point, there is no plausible deniability. Your cleaned-up data just happens to be the png image of some secret US bases? Good luck convincing a judge it's not intentional. If you encrypt it well enough, it might be that NSA never discover the underlying data, but that hinges on protecting the emitting source. If they get their hands on it, they can recover the keys.