>> Send PGP-encrypted messages using steganography for privacy then?
I’m not familiar with those techniques. PGP has an obvious header and footer - not sure how you could hide it. Plus the coding is pretty obvious.
-——BEGIN PGP MESSAGE-——
Version: 2.6.3a
[ENCRYPTED MESSAGE HERE]
-——END PGP MESSAGE-——
The bit-string that is the message gets buried in the low-information bits of the picture.
You encrypt “John has a long mustache” into a PGP message, you bury the message in a bit-map image of your really cute kitty, and post it on Facebook. The recipient knows to look for a picture of a kitty, downloads it, extracts the message and decrypts it.
“John has a long mustache”.
See the link I posted.
I guess an entire PGP-encrypted message, headers and all, would be concealed inside an image using steganography.