A novel hyperchaotic encryption algorithm for color image utilizing DNA dynamic encoding and self-adapting permutation

Image encryption has been an attractive research filed in recent years. In this paper, we propose a novel hyperchaotic encryption algorithm for color image utilizing DNA dynamic encoding and self-adapting permutation. Firstly, A new 4-dimensional hyperchaotic system is designed, and the detailed dynamic analysis shows that the system has strong pseudo-randomness and a large range of chaotic parameters. Secondly, based on the new 4-D hyperchaotic system, we devise the methods of DNA dynamic encoding, DNA dynamic calculation and DNA dynamic decoding in the image encryption algorithm, and the sequences generated by the hyperchaotic control these coding rules dynamically to make the results of operation more unpredictable. Moreover, the initial keystream is designed dependent upon the plaintext image, and the method of plaintext-related self-adapting permutation is proposed at the bit level and DNA level of the image respectively, which enhances the sensitivity of the algorithm to plaintext image and key. The theoretical analysis and numerical simulation show that the image algorithm has good security and can resist various attacks.