[clueless]

this is one of the primary communication methods of oversea agents in CIA, interesting to have it be used more broadly </joke>

[bagels]

Do you have a source? I'd be interested in reading more about this.

[cozmorado]

It's a form of Steganography https://en.wikipedia.org/wiki/Steganography

[bagels]

Was referring specifically to the claim about the CIA, I'm aware of steganography.

[edm0nd]

of course not, check their username.