Although many watermarking schemes consider the case of universal veri¯ ability, it is undesirable in some applications. Designated veri¯ cation is a possible solution for this problem. Watermarking scheme with (non-interactive) designated veri¯ cation through non-invertible schemes was proposed by Lee et al [11] in 2003, to resolve multiple wa- termarking problem. Yoo et al [14] proposed a very similar watermarking scheme. In this paper, we propose a cryptanalytic attack on both of these schemes that allows a dishonest watermarker to send illegal watermarked images and to convince the designated veri¯ er or customer that received watermarked images are valid.We modify the above schemes to overcome the attack. Further, we also propose a new robust watermarking scheme with (non-interactive) designated veri¯ cation through non-invertible wa- termarks. Interestingly, our scheme can be extended for joint copyright protection (security of ownership rights fo

On Designatedly Verified (Non-interactive) Watermarking Schemes.pdf

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