基于秘密共享和高阶谱的仿射不变性水印算法  

An Affine Transform Invariant Watermarking Algorithm Based on Secret Sharing and High Order Spectra

作　　者：张力[1] 肖薇薇[1] 纪震[1] 

机构地区：[1]深圳大学信息工程学院,深圳518060

出　　处：《模式识别与人工智能》2007年第4期533-537,共5页Pattern Recognition and Artificial Intelligence

基　　金：国家自然科学基金(No.60502027)

摘　　要：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.An affine transform invariant blind watermarking technique is proposed based on secret sharing and high order spectra in this paper . Watermark is divided into n shadows to enhance security, according to secret sharing scheme, only t or more than t shadows can reconstruct the secret watermark. The watermark is embedded in the rotation, scaling, and translation invariant vector of bispectrum. Bispectrum detection is utilized to detect whether the test image contains the watermark or not. Even with small signal noise ratio, the detector can get a high detection probability. The independent component analysis is adopted, and thus the shadow could be detected as well as extracted. Before watermark reconstruction, one way hash function is employed to withstand cheating attacks. The experimental results show that the proposed algorithm is robust against a variety of attacks by watermark test software--Stirmark.

关 键 词：仿射变换 双谱 秘密共享 单向散列函数 

分 类 号：TP309[自动化与计算机技术—计算机系统结构]