Live Code Digital Watermarking Technology Based on Chaotic Encryption

This paper proposes a digital image watermarking algorithm based on Lorenz chaotic function and live code. First, to balance the contradiction between imperceptibility and robustness, the host image is divided into 8×8 blocks, and the two-dimensional information entropy of each block is calculated to judge the embedding strength of the image block. Carry out DCT transformation, then use Lorenz chaotic model and Hash function to determine the position of watermark embedding to improve the security of the algorithm, and finally realize the embedding of live code watermark by adjusting the size of DCT domain coefficient value, and use live code to improve the flexibility and embedding capacity of watermarking algorithms significantly. Experimental results show that the algorithm can effectively resist conventional attacks and accurately decode the extracted live codes.