Disappearing Cryptography: Information Hiding: Steganography and Watermarking (2nd Edition)
Disappearing Cryptography: Information Hiding: Steganography and Watermarking (2nd Edition)
The Art of Deception: Controlling the Human Element of Security
The Art of Deception: Controlling the Human Element of Security
Covert messaging through TCP timestamps
PET'02 Proceedings of the 2nd international conference on Privacy enhancing technologies
On the limits of steganography
IEEE Journal on Selected Areas in Communications
A square-root law for active wardens
Proceedings of the thirteenth ACM multimedia workshop on Multimedia and security
Moving steganography and steganalysis from the laboratory into the real world
Proceedings of the first ACM workshop on Information hiding and multimedia security
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Unlike subliminal or steganographic channels, a supraliminal channel encodes information in the semantic content of cover data, generating innocent communication in a manner similar to mimic functions. These low-bitrate channels are robust to active wardens, and can be used with subliminal channels to achieve steganographic public key exchange. Automated generation of innocent-looking content, however, remains a difficult problem. Apple's iChat, a popular instant-messaging client and the default client on the Macintosh operating system, includes a video chat facility that allows the user to apply special effects such as replacing the user's background with a video file. We show how this can be used to implement a high-bitrate supraliminal channel, by embedding a computer animation engineered to communicate ciphertext by its pseudo-random behavior.