An Adaptive and Fragile Image Watermarking Algorithm Based on Composite Chaotic Iterative Dynamic System

A new self-embedding and fragile watermarking technique which was used for image integrity authentication was brought up. The assured function of the composite chaotic iterative dynamic system and its initial parameter was put forward. The method using the single pixel value for self-authentication that authenticating bit embedded in the lowest significant bit of the pixel value was brought up. It brought up the prime decomposition function of the pixel value, making the adjacent pixel value completely separated in chaotic calculation. It led up to the facts that no additional information was needed when authenticating, and the algorithm could prevent the safety danger caused by parameter transmission, and it could ascertain the position accurately to a single pixel when tamper occurs, the probability of successful attack was 50%.

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