A Designing Scheme for Blind Watermark of Two Keys

With An digital watermark scheme is proposed to protect the copyright of network digital image. Aiming at various kinds of watermark attacks, by analyzing the attack principle, a double key watermark embedding and extracting scheme is proposed, which is composed of authentication center and secret key. It solves the problem of watermark in anti interpretation attack. The experimental results show that the scheme not only has good invisibility, but also has ideal robustness for various attacks. How to effectively extract the feature value of the work and to solve the contradiction between the watermark embedding strength and the quality of the image will be the further research direction of this subject.