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基于多重元胞自动机的图像水印加密算法

DOI: 10.3724/SP.J.1004.2012.01824, PP. 1824-1830

Keywords: 元胞自动机,加密,可逆水印,直方图平移

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Abstract:

?针对目前基于直方图平移类可逆水印算法存在的安全问题,提出一种基于多重元胞自动机(Cellularautomata,CA)的图像水印加密算法.该算法综合考虑辅助信息、水印及水印图像三方面的安全性,利用不同的元胞自动机规则进行逐级加密,建立多重加密模型生成加密水印图像.仿真结果表明,该算法在密钥空间、直方图分布、相关性、信息熵及灰度变化等安全评估标准下均具有较高的安全性,有效克服了基于直方图平移类可逆水印算法在安全性方面存在的不足.

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