对一种抗统计分析的LSB隐写方案的攻击  

Attack on an LSB Steganography Scheme Against Statistica l Analysis

作　　者：刘光杰[1] 王金伟[1] 戴跃伟[1] 王执铨[1] 

机构地区：[1]南京理工大学自动化系,江苏南京210094

出　　处：《信息与控制》2005年第3期312-317,共6页Information and Control

基　　金：国家自然科学基金资助项目(60374066);江苏省自然科学基金资助项目(BK2001054)

摘　　要：针对张新鹏等人提出的抗统计分析的LSB隐写方案对图像差分直方图的影响,本文提出了一种基于差分直方图分析的隐写分析方案.该方案使用隐写前后图像差分直方图转移矩阵结合对差分直方图广义拉普拉斯分布的拟合偏差实现对嵌入数据长度的估计.实验证明该算法具有较好的估计精度.In this paper, a steganalytical scheme based on i ma ge difference histogram analysis is proposed on the basis of the effect on image difference histogram caused by the LSB steganography scheme against statistical analysis proposed by Zhang Xin-peng et al. The scheme uses the histogram trans fer matrix between the cover image and stego image, combining fitness bias cause d by using generalized Laplacian distribution to fit the difference histogram, t o estimate the embedded message length. Experiments show that our method has p referable accuracy.

关 键 词：隐写分析 LSB隐写 差分直方图分析 直方图转移矩阵 拟合偏差 

分 类 号：TP309[自动化与计算机技术—计算机系统结构]