A new self-embedding digital watermarking encryption scheme

For image information transmission security and copyright disputes, a novel and effective digital image watermarking encryption scheme is designed by combining zero watermarking and digital image encryption. In the aspect of watermark acquisition, the Canny operator is used to extract the edge features of the plaintext image, and the embedded watermark with a small amount of data and high similarity to the plaintext is obtained. This operation enables better post-embed invisibility as well as cost savings on transfer time. In the image encryption part, combined with DCT compression technology, the Fisher shuffling algorithm is improved, which can effectively scramble the position of pixels and reduce the time complexity of its operation. The improved gravity model algorithm is used to complete the diffusion operation so that the plaintext information is further hidden in the pixels. Simulation results and security analysis show that the proposed algorithm performs well in terms of time cost and encryption effect. The results of watermark restoration and reconstruction show that the scheme has an excellent performance in realizing the non-visualization and robustness of the watermark.