Secure Digital Watermarking Model with Side Information Theory and Cryptography

The idea of side information is introduced into secure watermarking, and a secure watermarking model with side information theory and the idea of cryptography is proposed. In the proposed model, the side information from the cover work, the attack and the detector are considered and fully used in both the preprocessing stage and the embedding stage. With the guidance of the proposed model, we also give three security mechanisms resisting typical secure attacks, such as collusion attack, homology detection and copy attack, which belong to unauthorized removal, unauthorized detection and unauthorized embedding. The proposed security mechanisms show that the side information and encryption technology can be used to get good watermarking algorithms with higher security.