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18 March 2008 A joint asymmetric watermarking and image encryption scheme
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Here we introduce a novel watermarking paradigm designed to be both asymmetric, i.e., involving a private key for embedding and a public key for detection, and commutative with a suitable encryption scheme, allowing both to cipher watermarked data and to mark encrypted data without interphering with the detection process. In order to demonstrate the effectiveness of the above principles, we present an explicit example where the watermarking part, based on elementary linear algebra, and the encryption part, exploiting a secret random permutation, are integrated in a commutative scheme.
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G. Boato, V. Conotter, F. G. B. De Natale, and C. Fontanari "A joint asymmetric watermarking and image encryption scheme", Proc. SPIE 6819, Security, Forensics, Steganography, and Watermarking of Multimedia Contents X, 68191A (18 March 2008);

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