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A Secure Web-Based Watermarking Scheme for Copyright Protection

A secure web-based watermarking scheme is proposed to allow the publisher or information provider to mark their copyrighted materials and identify an illegal distributor through the World Wide Web (WWW). In our proposed scheme, multi-watermark techniques and double encryption method is applied to make the scheme available in e-transaction and secure against collusion attacks even if the third party is not trusted. And the basic idea of zero knowledge proof is also used to make verification of an illegal distributor without the disclosure of any watermark information. Furthermore, a multiparty transaction scenario is also introduced by using our scheme in this paper. The analysis results indicate that our design goals are successfully achieved and some improvements are made over previously proposed schemes.