关键词: 图像加密, 超混沌映射, 正弦函数, 同或运算, 异或运算, 图像伪装

Abstract: Aiming at infrared image security protection in early warning detection system, an image encryption and  steganography method based on high performance hyperchaotic system is proposed. Firstly, a high performance 2D hyperchaotic system is constructed by combination sine function with close-loop modulation technique. Secondly, the weak structure random sequence is generated by the proposed hyperchaotic system with larger lyapunov index, and it is applied to control the pixel diffusion operation with feedback structure to realize image encryption,which is combined exclusive-or operation, include-or operation, with adding operations in finite field. In the end, the pixel location information is embedded into the pixel value of cipher image, and cipher image is camouflaged as texture image with some significance. Experimental results show that the proposed image encryption method has high security, and the steganography method of cipher image is simple and effective.

Key words: image encryption, hyperchaotic map, sine function, include-or operation, exclusive-or operation, image steganography