空域图像隐藏信息检测技术研究

Research on Detection of Hidden Information in Spatial Domain of Images

隐藏信息检测技术是对信息隐藏技术的攻击技术,是对抗非法信息传播的一个重要手段,也是衡量隐藏系统安全性的一个重要手段.针对常用的数字图像隐写载体,回顾图像隐藏信息检测技术的研究进展.重点针对空域LSB替换隐写的检测与隐藏信息量估计进展,针对克服了统计不对称性的LSB匹配嵌入检测或嵌入率估计进展,以及针对调色板图像隐写的检测研究进展.对于反隐写研究的发展趋势和面临的新问题也作了讨论.

The information detection technology attempts to break the information hiding technique,and hence,it is not only a mean of combating the illegal information transmission,but also an important measure to assess the security of the information hiding system.Aimed at a commonly used cover media,i.e.,the digital image,this article reviews the recent advances on the frontier of anti-steganography research.Emphases are laid on three issues： the development of LSB steganography;the development of the LSB matching steganography that avoids the statistic abnormality existing in the early simple LSB replacement method,either revealing the existence of secret information in a suspected image or estimating the length of the embedded data;and the development of steganalysis for palette images.Some new trends and problems faced by the steganalysts are also discussed.