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Watermarking security: theory and practice
IEEE Transactions on Signal Processing
This article proposes a theory of watermarking security based on a cryptanalysis point of view. The main idea is that information about the secret key leaks from the observations, for instance watermarked pieces of content, available to the opponent. Tools from information theory (Shannon's mutual information and Fisher's information matrix) can measure this leakage of information. The security level is then defined as the number of observations the attacker needs to successfully estimate thedoi:10.1109/tsp.2005.855418 fatcat:fkut4bvs55g73eseh4s7hizyke