Attacking Subsampling-Based Watermarking

Wei LU  Hongtao LU  Fu-Lai CHUNG  

Publication
IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences   Vol.E88-A   No.11   pp.3239-3240
Publication Date: 2005/11/01
Online ISSN: 
DOI: 10.1093/ietfec/e88-a.11.3239
Print ISSN: 0916-8508
Type of Manuscript: LETTER
Category: Information Security
Keyword: 
digital watermarking,  subsampling,  permutation,  

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Summary: 
This letter describes a permutation attack (PA) to the subsampling-based watermarking scheme where the high correlations between subimages obtained by subsampling the original image are used for watermark embedding. We show that the correlations can also be easily used to attack the watermarking scheme through a simple permutation procedure, while the quality degradation of attacked watermarked image is visually acceptable. Experimental results show the efficiency of the proposed attack algorithm.