An image encryption algorithm based on cascade chaotic map and DNA coding

Abstract

The 2D-Cascade-Transeform-Logistic-Sine Map (2D-CTLSM) with good randomness and large parameter chaos range is obtained by improving the Logistic and Sine map in a cascade manner. By combining the chaotic map with DNA coding, an efficient encryption algorithm based on a chaotic map with chunking dislocation and alternate row diffusion is designed. The shortcomings of zigzag itself are overcome by performing different zigzag transformations in chunks while combining DNA encoding to accomplish the diffusion operation. Due to the excellent properties of DNA encoding, the diffusion operation is performed by the DNA computation method with alternate row diffusion so that each value can complete the diffusion operation twice. The simulation experimental results and security analysis show that the algorithm can effectively resist various typical attacks, such as the information entropy is close to the expected value of 8, the correlation coefficient is close to 0, and the NPCR and UACI values can meet the critical value range, and so on. This is a safe and reliable image encryption algorithm.