Composite encryption algorithm based on combing chaos control with choosing rule

In order to enhance the security of image information,a New Image Encryption Algorithm based on combination of chaos control with pixel diffusion encryption is proposed.Firstly,Runge-Kutta method is used to solve fourth-dimension chaotic systems,and obtains a chaotic integer sequence by means of non-linear processing.Secondly,image diffusion encryption is controlled by combining the chaotic integer sequence with choosing rule,and obtained the composite encryption algorithm which includes a variety of diffusion encryption methods.In the end,analyze the correlations between pixels,the sensitivity of keys,against differential cryptanalysis of the image encryption results.Experimental results show that,the image encryption algorithm proposed in the paper is feasible and has high safety performance.