GRADIENT ENERGY DETECTION OF LSB STEGANOGRAPHY  

作　　者：LiZhi SuiAifen NiuXinxin YangYixian 

机构地区：[1]InformationSecurityCenter,BeijingUniv.ofPostsandTelecomm.,Beijing100876,China [2]InstituteofElectronicInformation,SichuanUniv.,Chengdu610064,China

出　　处：《Journal of Electronics(China)》2005年第1期47-52,共6页电子科学学刊（英文版）

基　　金：SupportedbytheNationalNaturalScienceFoundationofChina(No.60073049)973Program(No.G1999035805)863Program(No.2002AA143041)

摘　　要：The spatial Least Significant Bit (LSB) steganography results in the alteration of the smooth characteristics between adjoining pixels of the raw image. The relation between the length of embedded message and the gradient energy is theoretically analyzed, and then a steganalysis and detection method, named Gradient Energy-Flipping Rate (GEFR) detection is proposed. Based on the analysis of the variation of the gradient energy, which results from the LSB steganography in color and grayscale image, the secret message embedded in the target image is detected, and the length of the embedded message is estimated. The method is proved effective and accurate by simulation (detection rate reaches O.Olbit per pixel).The spatial Least Significant Bit (LSB) steganography results in the alteration of the smooth characteristics between adjoining pixels of the raw image. The relation between the length of embedded message and the gradient energy is theoretically analyzed, and then a steganalysis and detection method, named Gradient Energy-Flipping Rate (GEFR) detection is proposed. Based on the analysis of the variation of the gradient energy, which results from the LSB steganography in color and grayscale image, the secret message embedded in the target image is detected, and the length of the embedded message is estimated. The method is proved effective and accurate by simulation (detection rate reaches 0.01bit per pixel).

关 键 词：STEGANOGRAPHY STEGANALYSIS DETECTION Gradient energy 

分 类 号：TN918.1[电子电信—通信与信息系统]