An encryption algorithm for color images based on an improved dual-chaotic system combined with DNA encoding

Abstract In order to bolster the security of image encryption, this investigation presents a color image encryption algorithm founded on an improved dual-chaotic system integrated with DNA encoding. The initial step involves formulating an improved Logistic chaotic system, permitting arbitrary real numbers for the mapping range, initial values, and parameter values. This enhanced Logistic chaotic system, in conjunction with initial values from the hyper-chaotic Chen system, is derived by integrating the plaintext image, thereby generating keys associated with the plaintext. Subsequently, the image undergoes block encryption utilizing DNA encoding. Ultimately, row-column permutations are executed utilizing the chaotic sequence generated by the improved Logistic chaotic system. In the security analysis of the ciphertext image, the algorithm delineated in this paper showcases robustness and security, adeptly thwarting various well-known attacks. It outperforms other algorithms in terms of comprehensive performance.