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). |
(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. |