摘要：In this paper, a novel fragile watermarking scheme based on the continued fraction technique is pro-posed. The goal of this scheme is to verify the integrity of a watermarked image. The feature value of the image is generated from the calculation of the continued fraction. The feature value is regarded as the important information to be hidden in the image. If the watermarked image is suspected of being tem-pered with, the watermark extraction procedure could be used for verification. We do not to use another image as the watermark image in our scheme. The proposed scheme can solve the weaknesses in the public key blockwise-independent watermarking scheme proposed by Wong in 1998. This is because the proposed scheme uses the continued fraction technique to achieve inter-block dependence for image au-thentication. According to experimental results, the image quality of each watermarked image is good, and the visual quality of the watermarked image is not affected when the proposed watermark insertion procedure is carried out.
关键词：fragile watermark; public key encryption; and continued fraction
