Coverings, centered codes, and combinatorial steganography
Problems of Information Transmission
The square root law does not require a linear key
Proceedings of the 12th ACM workshop on Multimedia and security
Using high-dimensional image models to perform highly undetectable steganography
IH'10 Proceedings of the 12th international conference on Information hiding
Message in a bottle: sailing past censorship
Proceedings of the 29th Annual Computer Security Applications Conference
Blacknoise: lightweight low-fi steganography in defense of free speech
Proceedings of the 4th Annual Symposium on Computing for Development
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In 1998 C. Cachin proposed an information-theoretic approach to steganography. In particular, in the framework of this approach, so-called perfectly secure stegosystems were defined, where messages that carry and do not carry hidden information are statistically indistinguishable. There was also described a universal steganographic system, for which this property holds only asymptotically, as the message length grows, while encoding and decoding complexity increases exponentially. (By definition, a system is universal if it is also applicable in the case where probabilistic characteristics of messages used to transmit hidden information are not known completely.)In the present paper we propose a universal steganographic system where messages that carry and do not carry hidden information are statistically indistinguishable, while transmission rate of "hidden" information approaches the limit, the Shannon entropy of the source used to "embed" the hidden information.