On the Security of a Fragile Digital Image Watermarking Scheme

J. Sang (PRC), M.S. Alam (USA), and X. Zhu (PRC)


Fragile watermarking, tamper detection, tamper recovery, security


In this paper, the security of a fragile digital watermarking for image tamper detection and recovery proposed in Reference 1 is analyzed. It is shown that the secret key for watermark embedding and detection can be easily obtained by exhaustive search, while keeping the number of the necessary exhaustive searches small. Therefore, one may counterfeit watermarks successfully, resulting in incorrect authentication. The possible solutions for such problems are suggested in this paper.

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