Image encryption using 2D Hénon-Sine map and DNA approach

Chaotic systems have been widely applied in digital image encryption due to their complex properties such as ergodicity, pseudo randomness and extreme sensitivity to their initial values and parameters. This paper first proposes a two-dimensional Hénon-Sine map (2D-HSM). The new map possesses better ergodicity and pseudo randomness, and its parameters have a wider chaotic range, compared with many existing chaotic systems. Then a DNA encoding and a DNA exclusive-or (XOR) operation rule are defined because DNA approach applying in image encryption can greatly improve the efficiency of image permutation and diffusion. Furthermore, a novel image encryption scheme whose image pixels are diffused by the DNA approach and permutated by 2D-HSM, is proposed to protect image content while an image is transferred over the Internet. Some experimental analyses such as statistical attack analysis, differential attack analysis, exhaustive attack analysis, robustness against noise and computational complexity have been applied to measure the new scheme, and the experimental results illustrate the scheme possesses better encryption performances than that of other references, and therefore, is secure in real-world communication.