Efficient image encryption scheme with synchronous substitution and diffusion based on double S-boxes*

Project supported by the Natural Science Foundation of Shaanxi Province, China (Grant No. 2014JM8322).

Zhang Xuan-Ping, Guo Rui, Chen Heng-Wei, Zhao Zhong-Meng, Wang Jia-Yin
       

(color online) Correlation analysis: (a) plain image and its (b) horizontal, (c) vertical, and (d) diagonal correlation; (e) encrypted image and its (f) horizontal, (g) vertical, and (h) diagonal correlation.