Anti-protocol Attacks Digital Watermarking Based on Media-Hash and SVD

The conventional SVD-based watermarking has been proved to be flawed by protocol attacks. An image watermarking algorithm is proposed based on media hash. Instead of using randomly Gaussian sequence as watermark, a meaningful text message modulated by media hash sequence is used. Theoretical analysis results show that the proposed algorithm solves the problem of protocol attack, while keeping all the advantages of previous SVD-based schemes. Experimental results show that the proposed algorithm is robust and secure. Comparisons with previous algorithms indicate that the performance of the proposed algorithm has been significantly improved.