Wouldn't I call the latter "encryption"? Nothing stopping you encrypting a steganographic message. Denying message existence isn't going to be possible in a sy

Wouldn't I call the latter "encryption"? Nothing stopping you encrypting a steganographic message. Denying message existence isn't going to be possible in a system that also compresses data and leaks file size - the latter rules out having null states (all RF communication?) or large blocks of zeros (most, if not all, storage?). You could do something to avoid that, by doing a LOT of padding with random bits - but again, that's back to encryption, isn't it? Except encryption is something you can apply in the real world, where constant broadcast is usually impractical.