| [x] is just [y] with more steps Stenography is just security by more obscurity. Specifically, shuffling compression, bit-rate, encryption, and barely human-perceivable signal around mediums (x-M) to obscure the entrophic/random state of any medium as to not break the generally-available plausible-deniability from a human-perception. Can't break Shannon's law, but hides who intent of who is behind the knocks on the all doors. Obscures which house Shannon lives in, and whom who knocks wishes to communicate. |
Security-by-obscurity is when security hinges on keeping your algorithm itself (as opposed to some key) hidden from the adversary.
I don't see how it has any connnection with what you're alluding to here.