关键词:  数字水印, 图像处理, 非对称公钥通信, 抗几何变换, 加密

Abstract: A new asymmetric public key digital watermarking algorithm for still images was presented. The private key was embedded into the watermark, the public key was used to decrypt and detect. The results show that the attacker removed watermark without adequate information of the public key and private key. The image would be geometric deformation, and could obtain information of attacks from the image geometric distortion.

Key words: Watermarking, Image processing, Asymmetric publickey communication, Geometrical transformations resistance, Encryption