期刊
OPTIK
卷 125, 期 22, 页码 6672-6677出版社
ELSEVIER GMBH
DOI: 10.1016/j.ijleo.2014.06.149
关键词
Image encryption; Generalized Arnold map; Affine cipher
类别
资金
- National Natural Science Foundation of China [61202085]
- Natural Science Foundation of Liaoning, China [201202074]
This paper aims to provide an image encryption scheme with an efficient bit-level permutation and a pixel-level diffusion procedure. In the bit-level permutation, we divide each pixel into 8 bits, and arrange the positions of each bit by the generalized Arnold map in row and column direction. Hence, a significant diffusion effect is happened in the bit-level permutation. In the pixel-level diffusion procedure, we apply affine cipher to change the gray value and the histogram distribution of the permutated image. Various types of security analyses demonstrate that the proposed scheme is competitive with that ordinary permutation-diffusion type image cipher and proper for practical image encryption. (C) 2014 Elsevier GmbH. All rights reserved.
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