抗几何失真的非对称水印研究

提出一种非对称公钥水印算法,采用私钥嵌入水印,而解码仅需简单的公钥,这种非对称水印可携带大量信息.不管是知道公钥,还是知道隐藏信息的攻击者,都不能移除水印.该算法能够从一幅遭受攻击的图像中,特别是能够从一幅经几何变换的图像中读取水印.采用Stirmark对水印的鲁棒性进行了测试,结果表明该水印对抗各种几何攻击都具有较好的鲁棒性.

Study of Asymmetric Watermark Against Geometric Infidelities

An asymmetric public-key watermark is proposed,which is embedded with the use of a private key,while the decoding uses only a simple public key.The asymmetric watermark carries certain number of information.Neither the knowledge of the public key,nor the knowledge of the hidden information,allows the attacker to remove the watermark.That information can be read from an attacked image,in particular from a geometrically transformed image.The robustness of the scheme is tested with Stirmark benchmark,the measu...