Re: re: Steganography
But properly done steganography is impossible to detect in a fresh image. As long as no "before" image is kept anywhere, the spooks can have from now to eternity to try to decrypt them.
Besides steganography may not necessarily involve fiddling with the binary data in a file. Information in a picture may actually be contained in the subject of the picture.
Post a picture of "me and the posse" and you're signalling "go ahead with operation Pablo".
Post a picture of "me and Aunt Mabel and Uncle Terence" and you're signalling "Operation abort. Agent compromised".
Ever seen "Mississippi Burning" ? There's a scene where one FBI agent shows how Ku Klux Klan members were able to signal in photos their allegiance. You'd only know it was there if you were told.