A new approach to commutative watermarking-encryption

Authors:
Roland Schmitz;Shujun Li;Christos Grecos;Xinpeng Zhang
Affiliations:
Stuttgart Media University, Germany;University of Surrey, UK;University of the West of Scotland, UK;Shanghai University, China
Venue:
CMS'12 Proceedings of the 13th IFIP TC 6/TC 11 international conference on Communications and Multimedia Security
Year:
2012

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Abstract

We propose a new approach to commutative watermarking-encryption (CWE). A permutation cipher is used to encrypt the multimedia data, which leaves the global statistics of the multimedia data intact. Therefore, any non-localized watermarking scheme that depends only on global statistics of the multimedia data can be combined with the permutation cipher to form a CWE scheme. We demonstrate this approach by giving a concrete implementation, which manipulates the global histogram to achieve watermark embedding/detection.