Attack on "Watermarking method based on significant difference of wavelet coefficient quantization"

Authors:
Peter Meerwald;Christian Koidl;Andreas Uhl
Affiliations:
Department of Computer Sciences, University of Salzburg, Salzburg, Austria;Department of Computer Sciences, University of Salzburg, Salzburg, Austria;Department of Computer Sciences, University of Salzburg, Salzburg, Austria
Venue:
IEEE Transactions on Multimedia
Year:
2009

Citing 6
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Abstract

This letter describes an attack on the recently proposed "Watermarking Method Based on Significant Difference of Wavelet Coefficient Quantization" by Lin et al. While the method is shown to be robust against many signal processing operations, security of the watermarking scheme under intentional attack exploiting knowledge of the implementation has been neglected. We demonstrate a straightforward attack which retains the fidelity of the image. The method is therefore not suitable for copyright protection applications. Further, we propose a countermeasure which mitigates the shortcoming.