Steganalysis of LSB Matching Using Characteristic Function Moment of Pixel Differences  

作　　者：Xianyi Chen Guangyong Gao Dandan Liu Zhihua Xia 

机构地区：[1]Jiangsu Engineering Center of Network Monitoring,Jiangsu Collaborative Innovation Center on Atmospheric Environment and Equipment Technology,School of Computer and Software,Nanjing University of Information Science & Technology [2]School of Information Science & Technology,Jiujiang University

出　　处：《China Communications》2016年第7期66-73,共8页中国通信（英文版）

基　　金：supported by the NSFC(61173141,61362032,U1536206, 61232016,U1405254,61373133,61502242,61572258);BK20150925;the Natural Science Foundation of Jiangxi Province, China(20151BAB207003);the Fund of Jiangsu Engineering Center of Network Monitoring(KJR1402);the Fund of MOE Internet Innovation Platform(KJRP1403);the CICAEET fund;the PAPD fund

摘　　要：Nowadays,many steganographic tools have been developed,and secret messages can be imperceptibly transmitted through public networks.This paper concentrates on steganalysis against spatial least significant bit(LSB) matching,which is the prototype of many advanced information hiding methods.Many existing algorithms deal with steganalysis problems by using the dependencies between adjacent pixels.From another aspect,this paper calculates the differences among pixel pairs and proves that the histogram of difference values will be smoothed by stego noises.We calculate the difference histogram characteristic function(DHCF) and deduce that the moment of DHCFs(DHCFM) will be diminished after stego bits are hidden in the image.Accordingly,we compute the DHCFMs as the discriminative features.We calibrate the features by decreasing the influence of image content on them and train support vector machine classifiers based on the calibrated features.Experimental results demonstrate that the DHCFMs calculated with nonadjacent pixels are helpful to detect stego messages hidden by LSB matching.Nowadays,many steganographic tools have been developed,and secret messages can be imperceptibly transmitted through public networks.This paper concentrates on steganalysis against spatial least significant bit（LSB） matching,which is the prototype of many advanced information hiding methods.Many existing algorithms deal with steganalysis problems by using the dependencies between adjacent pixels.From another aspect,this paper calculates the differences among pixel pairs and proves that the histogram of difference values will be smoothed by stego noises.We calculate the difference histogram characteristic function（DHCF） and deduce that the moment of DHCFs（DHCFM） will be diminished after stego bits are hidden in the image.Accordingly,we compute the DHCFMs as the discriminative features.We calibrate the features by decreasing the influence of image content on them and train support vector machine classifiers based on the calibrated features.Experimental results demonstrate that the DHCFMs calculated with nonadjacent pixels are helpful to detect stego messages hidden by LSB matching.

关 键 词：information hiding steganalysis pixel differences nonadjacent pixels SVM 

分 类 号：TP309[自动化与计算机技术—计算机系统结构]