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On Thu, Jan 15, 2015 at 03:59:30PM +0000, Brad Rogers wrote: > >Could it be useful for embedding a small text file in an image which > >is creative commons so that the text file has the basic information as > > There's no need to do that as such capability is built in to most, if > not all, image and video file formats anyway. There's also plenty of > software capable of editing/reading such metadata (as it's known). Indeed. Steganography is not so much hiding text in images, but doing so in such a way that anyone seeing the image - even if they read the metadata - have no idea that a message is being sent in the first place. It's not just about images though. I've seen a malicious website that hid configuration information in whitespace, where it was encoded in binary through spaces and tabs. Non-technical examples include a US soldier who was captured during the Vietnam war and, during a video message in which he said he was doing fine, used morse code to communicate through facial expressions he was being tortured. Or a letter in which the real message is read by reading every fifth word. Martijn. -- The Mailing List for the Devon & Cornwall LUG http://mailman.dclug.org.uk/listinfo/list FAQ: http://www.dcglug.org.uk/listfaq