On Designatedly Veried (Non-interactive)Watermarking Schemes-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