On the Security of the Self-Embedding Watermarking Scheme

A security holes resulting from a small key space of the offset in the exiting self-embedding watermarking schemes have been pointed out.To further illustrate their insecurity,a novel forgery technique,called a 'synchronous counterfeiting(SC) attack',is proposed and implemented on the latest self-embedding watermarking scheme proposed in the literature successfully.We also describe a possible solution to this problem of a small key space that makes our attack computationally intractable.