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21 March 2005 On the choice of risk optimal data embedding strategy, safe embedding rate, and passive steganalysis
Rajarathnam Chandramouli
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Proceedings Volume 5681, Security, Steganography, and Watermarking of Multimedia Contents VII; (2005) https://doi.org/10.1117/12.591875
Event: Electronic Imaging 2005, 2005, San Jose, California, United States
Abstract
Suppose Alice the information hider wants to send a stego message to Bob in the presence of Wendy the (passive) warden. Wendy employs one of n different passive steganalysis detectors to decide if the data from Alice contains any hidden message before passing it on to Bob. Suppose Alice can choose from a set of information hiding schemes and possesses only an incomplete information about the steganalysis strategy choice of Wendy. That is, suppose Alice only knows an ordering of the probabilities (and not the values themselves), say, p1 ≥ p2 ≥ ... ≥ pn where pj is the probability of Wendy using jth detector. Under this scenario we investigate answers to the following two questions by generalizing a previous result by the author and deriving new ones: (a) how must Alice choose the optimal data hiding strategy subject to risk constraints and (b) what is the maximum safe embedding rate, i.e., maximum message rate that can be embedded without being detected by Wendy? Detailed analysis and numerical results are presented to answer these questions.
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Rajarathnam Chandramouli "On the choice of risk optimal data embedding strategy, safe embedding rate, and passive steganalysis", Proc. SPIE 5681, Security, Steganography, and Watermarking of Multimedia Contents VII, (21 March 2005); https://doi.org/10.1117/12.591875
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KEYWORDS
Steganalysis
Sensors
Data hiding
Detection and tracking algorithms
Digital imaging
Steganography
Digital watermarking
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