Exploiting the Intrinsic Irreversibility of Adaptive Technologies to Enhance the Security of Digital Watermarking

Authors:
Xianfeng Zhao;Weinong Wang;Kefei Chen
Affiliations:
-;-;-
Venue:
WAIM '02 Proceedings of the Third International Conference on Advances in Web-Age Information Management
Year:
2002

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Abstract

To overcome the reversibility of the widely researched adaptive watermarking, the existing method based on cryptography is first directly revised for adaptive systems. The intrinsic irreversibility of some adaptive technologies is then disclosed and evaluated. Under these technologies, attackers have great difficulty dividing a released version into their claimed original data and scaled watermarks, and in the meantime making the latter be the particular adaptive results based on the former. Their reversed solutions are violently perturbed and perceptually unacceptable. The condition number of the coefficient matrix of the reverse equations can be employed to assess the degree of the perturbation. The proposed method is more efficient because it disposes of any cryptographic processing, such as hashing and stream generation. The experiments on images support the theoretic conclusion well.