IWDW '07 Proceedings of the 6th International Workshop on Digital Watermarking
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In traditional watermark detection, a prover exposes the secret information that can be used to remove the watermark to the possible dishonest verifier in order to prove a watermark presents in a digital data. This is a significant security risk because a potential attacker is able to remove the watermark once secret information like watermark or embedding key is known. Some of previous schemes proposed as solution haven't achieved desirable result really. Their lacking of security and validity is the most severe problem. In this paper, we propose the watermark detection schemes with high security, which are based on zero knowledge protocol and public-key encryption scheme, for both blind watermark scheme and non-blind watermark scheme. These two schemes provide copyright proving without revealing any information that can be used for removing watermark during the detection process. Both security and validity of watermark detection can be significantly improved using these two schemes.