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针对EzStego隐写图像的检测方法

DOI: 10.11834/jig.200609222

Keywords: 隐写分析,信息隐藏,EzStego,频度统计

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Abstract:

针对基于调色板图像的EzStego隐写算法,在分析比较了目前常见的χ^2统计分析与RS分析方法后,指出了这两种方法在低嵌入率的EzStego隐写图像检测中的不足及其产生问题的主要原因,考虑到EzStego隐写算法的以下两个显著特征:颜色对及顺序嵌入,提出了一种基于颜色对频度统计分析的新型检测算法。实验结果表明,这种方法适用于EzStego隐写图像的检测,在低嵌入率情况下,其检测率和虚警率优于χ^2统计分析与RS分析方法。该方法在使虚警率降低1~2倍的情况下,检测率达到87%,而其他两个方法的检测率只有63%~69%,该新方法19~24个百分点。

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