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基于秘密共享和高阶谱的仿射不变性水印算法*

, PP. 533-537

Keywords: 仿射变换,双谱,秘密共享,单向散列函数

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Abstract:

提出一种基于秘密共享和高阶谱的仿射不变性盲水印算法.按照秘密共享将水印分解为n份,只有t个或大于t个用户才能恢复出水印,在增加水印安全性的同时可防止秘密信息的泄漏.在双谱的平移、旋转和尺度不变性向量中嵌入水印来实现仿射不变性.检测过程采用双谱检测是否含有指定的水印,使得在信噪较低时只要具有较大的双谱信息仍能得到较大的检测概率.并利用独立分量分析进行水印的盲分离.在信息恢复之前,利用单向散列函数抵抗欺骗攻击.实验数据证明本文算法对通用水印测试软件Stirmark提供的各种攻击具有较好的鲁棒性.

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