Research on a New Type of Chaotic Image Encryption Algorithm Combining DNA Operation and S-box

Given the fixed DNA coding and operation rules of DNA coding, the single S-box operation function cannot meet the more complex and secure encryption requirements. Therefore, a new type of complex symmetric chaotic image encryption combining DNA up and down cyclic shift operation and S-box operation is the proposed algorithm. In this way, we propose a new chaotic map. The encryption system combines the sensitivity and unpredictability of the chaotic system to the initial value to generate random sequences and S-boxes It replaces the sequence matrix with S-box to further increase the randomness. Finally, the replaced matrix and the original image are DNA-encoded and combined with the proposed new calculation to complete the encryption operation. The algorithm proposed in this paper is more secure and robust through simulation experiments and performance index analysis.