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Watermarking security part II: practice

François Cayre 1 Caroline Fontaine 2 Teddy Furon 1 
1 TEMICS - Digital image processing, modeling and communication
IRISA - Institut de Recherche en Informatique et Systèmes Aléatoires, Inria Rennes – Bretagne Atlantique
Abstract : This second part focuses on estimation of secret parameters of some practical watermarking techniques. The first part reveals some theoretical bounds of information leakage about secret keys from observations. However, as usual in information theory, nothing has been said about practical algorithms which pirates use in real life application. Whereas Part One deals with the necessary number of observations to disclose secret keys (see definitions of security levels), this part focuses on the complexity or the computing power of practical estimators. Again, we are inspired here by the work of Shannon as in his famous article [15], he has already made a clear cut between the unicity distance and the work of opponents' algorithm. Our experimental work also illustrates how Blind Source Separation (especially Independent Component Analysis) algorithms help the opponent exploiting this information leakage to disclose the secret carriers in the spread spectrum case. Simulations assess the security levels theoretically derived in Part One.
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Submitted on : Friday, June 30, 2006 - 10:37:11 AM
Last modification on : Friday, February 4, 2022 - 3:23:02 AM
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  • HAL Id : inria-00083335, version 1


François Cayre, Caroline Fontaine, Teddy Furon. Watermarking security part II: practice. Security, Steganography, and Watermarking of Multimedia Contents VII, Jan 2005, San Jose, CA, USA, United States. pp.758--767. ⟨inria-00083335⟩



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