一种针对LSB替换隐写的消息定位方法  

Locating Payload for LSB Replacement

作　　者：刘文彬 刘九芬 

机构地区：[1]数学工程与先进计算国家重点实验室,河南郑州450001

出　　处：《信息工程大学学报》2013年第6期641-646,共6页Journal of Information Engineering University

基　　金：国家自然科学基金资助项目(60803155)

摘　　要：目前已有很多算法可以对LSB替换隐写进行有效检测。文章进一步研究针对LSB替换隐写的消息嵌入位置定位方法,从而为隐藏信息的提取提供关键信息。首先分析LSB替换消息嵌入过程对WS残差的影响,得到单幅图像的WS残差分布;然后提出单幅图像上修改位置的定位方法;最后提出基于修改点定位的消息定位算法。实验结果表明了该算法的有效性。Many highly sensitive detectors for least significant bit （LSB） replacing steganography have been proposed so far. This paper aims to locate the embedding payload for LSB replacing, so as to provide essential information for the extraction of secret information. First, the effect of embed- ding process on WS residual is analyzed, and the probability distribution of WS residual in a single image is derived. Then modified pixels in a single stego image are located, and a method to locate the embedding payload is proposed. Experimental results show that the proposed method operates well.

关 键 词：隐写定位 LSB替换 WS残差 

分 类 号：TN918[电子电信—通信与信息系统]