Image encryption algorithm based on 2D-CLICM chaotic system

Abstract

Image encryption algorithm based on a two-dimensional Chebyshev-Logistic-Infinite Collapse Map (2D-CLICM) is proposed. A new two-dimensional chaotic map is designed, and numerical studies show that 2D-CLICM has a larger chaotic region, better randomness and more complex chaotic behavior. An image encryption algorithm (CLICM-IE) is developed based on the 2D-CLICM. The randomly generated key is used to generate more random chaotic sequences and the security is greatly improved. To obtain lower computation and time complexity, the whole process performs row encryption for each image pixel. The Arnold transformation preprocesses the image and then the encryption of image pixels is accomplished by controlling the random confusion and diffusion parts with the sequence generated by 2D-CLICM. The results show that the CLICM-IE algorithm is deeply random and unpredictable, and resists a variety of attacks. These results can provide good basis and practical application for the chaos generation and image encryption.