Abstract
In this paper, a novel color image encryption with heterogeneous bit-permutation and correlated chaos is proposed. Considering the difference of information amounts between bit-planes, the author employs heterogeneous bit-permutation to reduce computation cost and improve permutation efficiency, then performs expanded XOR operation for R, G, B components of color images, thus obtains cipher color images. The correlated chaos is introduced, which not only provides us a new way when making initialization for chaotic maps, but also takes fully use of chaotic maps. The architecture of permutation and diffusion is employed, and one-dimension WPLCW chaotic maps are used to generate pseudo-random sequences during the whole encryption process. The experiment results and analysis have proved the proposed color image encryption algorithm is secure and effective.
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