Resistance of Anti Disclosure Image Watermark to Collusion and Copy Attacks An Approach of Combining Perceptual Hash and Watermark

Abstract

Robustness is a critical requirement regarding the practicability of a watermarking scheme Cur rent watermarking methods usually claim a certain degree of robustness against those attacks that aim to destroy the hidden watermark at the expense of degrading the quality of media data How ever there exists a kind of watermark estimation attack WEA such as the collusion attack that can remove watermarks meanwhile the attacked data can be made further transparent to its original Another kind is the copy attack that can create the protocol ambiguity problem within a watermark ing system The motivation of this paper is dedicated to cope with the WEA that is clever at disclosing hidden information for unauthorized purposes To this end we begin by gaining an in sight into the WEA that leads to formal de nitions of optimal watermark estimation and perfect cover data recovery Subject to these de nitions content dependent watermark CDW is proposed to resist watermark estimation attack The key point is to introduce a media hash as a constituent component of the CDW Mathematical analyses and experiment results have consistently veri ed the e ectiveness of the content dependent watermarking scheme To our knowledge the proposed anti disclosure watermark is the rst to resist both the collusion and the copy attacks

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Cite this paper

@inproceedings{Lu2003ResistanceOA, title={Resistance of Anti Disclosure Image Watermark to Collusion and Copy Attacks An Approach of Combining Perceptual Hash and Watermark}, author={Chun Shien Lu and Chao Yong Hsu}, year={2003} }