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Scrambling algorithm based on layered Arnold transform
Author(s): 
Pages: 2240-2243
Year: Issue:  8
Journal: Journal of Computer Applications

Keyword:  bit-planeArnold transformimage scramblingscrambling degreespatial information hiding;
Abstract: 针对数字图像信息隐藏存在的安全问题,提出一种基于按位分层Arnold变换的置乱算法.算法将秘密图像按位平面分层,同时考虑图像的位置迁移和像素的灰度变换,对每个位平面进行不同次数的Arnold变换,经像素交叉换位,相邻像素间按位异或得出置乱图像.实验结果表明,秘密图像分层置乱后直方图分布更加均匀,与白噪声相似度在0.962左右,置乱图像可近无损地还原和提取,提高了信息隐藏的鲁棒性.与其他置乱算法相比,置乱图像具有更高的置乱度、更强的抵御攻击能力,提高了空域信息隐藏的安全性.
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