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Capacity of steganographic channels (2005)
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| Venue: | Proceedings 7th ACM Workshop on Multimedia and Security |
| Citations: | 6 - 0 self |
BibTeX
@INPROCEEDINGS{Harmsen05capacityof,
author = {Jeremiah J. Harmsen and William A. Pearlman},
title = {Capacity of steganographic channels},
booktitle = {Proceedings 7th ACM Workshop on Multimedia and Security},
year = {2005}
}
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Abstract
Abstract — This work investigates a central problem in steganography, that is: How much data can safely be hidden without being detected? To answer this question a formal definition of steganographic capacity is presented. Once this has been defined a general formula for the capacity is developed. The formula is applicable to a very broad spectrum of channels due to the use of an information-spectrum approach. This approach allows for the analysis of arbitrary steganalyzers as well as non-stationary, non-ergodic encoder and attack channels. After the general formula is presented, various simplifi-cations are applied to gain insight into example hiding and detection methodologies. Finally, the context and applica-tions of the work are summarized in a general discussion. Index Terms — Steganographic capacity, stego-channel, steganalysis, steganography, information theory, informa-
Keyphrases
steganographic channel general formula central problem attack channel non-ergodic encoder detection methodology steganographic capacity various simplifi-cations information theory index term steganographic capacity formal definition information-spectrum approach much data broad spectrum arbitrary steganalyzers general discussion example hiding
