Lossless Codebook-Based Digital Watermarking Scheme with Authentication

Xing et al. proposed a digital watermarking scheme based on visual cryptography and the extended codebook in order to eliminate ambiguity problem. However, there exists still an ambiguity problem such that the watermark can be extracted from other owner's watermarked image. In order to solve this problem, we propose a new digital watermarking scheme with authentication. The proposed scheme is based on a lossless codebook which degrades a contrast of watermarked image and does not exist an ambiguity problem. Also, the proposed scheme provides authentication because of the utilization of characteristics between original and other images. In order to evaluate robustness and ambiguity problem, several watermarking attacks performed. As the results, the proposed scheme provides robustness against several watermarking attacks and eliminates an ambiguity problem.