A new chaos-based fast image encryption algorithm
A new chaos-based fast image encryption algorithm
复制标题
一种新的基于混沌的快速图像加密算法
DOI：
10.1016/j.asoc.2009.12.011
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发表时间：
2011
期刊：
影响因子：
--
通讯作者：
Chen, Guanrong
中科院分区：
文献类型：
--
作者：
Wang, Yong;Wong, Kwok-Wo;Liao, Xiaofeng;Chen, Guanrong
In recent years, various image encryption algorithms based on the permutation–diffusion architecture have been proposed where, however, permutation and diffusion are considered as two separate stages, both requiring image-scanning to obtain pixel values. If these two stages are combined, the duplicated scanning effort can be reduced and the encryption can be accelerated. In this paper, a fast image encryption algorithm with combined permutation and diffusion is proposed. First, the image is partitioned into blocks of pixels. Then, spatiotemporal chaos is employed to shuffle the blocks and, at the same time, to change the pixel values. Meanwhile, an efficient method for generating pseudorandom numbers from spatiotemporal chaos is suggested, which further increases the encryption speed. Theoretical analyses and computer simulations both confirm that the new algorithm has high security and is very fast for practical image encryption.
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