steganography

A Look at Photo Steganography, the Hiding of Secrets Inside Digital Images

Here's a fascinating (but very heady) video by Computerphile, which recently sat down with image analyst Dr. Mike Pound of the University of Nottingham to talk about the subject of digital image steganography.

Steganography is the practice of hiding one piece of content inside another. In this case, Pound talks about the idea of being able to kind all kinds of content inside digital photograph files.

Secretbook App Lets You Share Secret Messages Through Facebook Photos

Steganography is the art of passing secret messages in a way that most observers wouldn't detect even though the message is in plain view. Unlike cryptography, which attempts to transmit messages as nonsense, steganography uses security through obscurity, relying on the fact that most people aren't looking for secret messages in ordinary things. Passing notes in invisible ink would be one example.

Owen-Campbell Moore, a computer science researcher over at Oxford University, has been developing a method for passing secret messages through Facebook photo sharing.