This paper proposes a modified method of payload location aimed at least significant bit replacement (LSB-R) by combining weighed-stego (WS) residuals with maximum a posteriori (MAP) cover estimator.We use the WS residuals to locate payloads, and take the results as a priori information to apply the modified MAP cover estimator to get more accurate cover estimates. The residuals are then computed to locate payloads. Experimental results demonstrate effectiveness of the approach in locating payloads both on JPEGdecompressed images and originally lossless stored images. Furthermore, the proposed approach is suitable for payload location with different embedding rates.
YAN Xiao-meng, ZHANG Tao, LI Wen-xiang, PING Xi-jian
. Locating Steganographic Payload by Combining WS Residuals and MAP Cover Estimator[J]. Journal of Applied Sciences, 2014
, 32(4)
: 401
-408
.
DOI: 10.3969/j.issn.0255-8297.2014.04.010
[1] PETITCOLAS F A P, ANDERSON R J, KUHN M G. Information hiding-A survey [J]. Proceedings of the IEEE, Special Issue on Identification and Protection of Multimedia Information, 1999，87(7):1062-1078.
[2] WESTFELD A, PFITZMANN A. Attacks on steganographic systems [C]// Third International Workshop on Information Hiding, Lecture Notes in Computer Science ,2000,1768: 61-76.
[3] FRIDRICH J, GOLJAN M, RUI D. Reliable detection of LSB steganography in color and grayscale images [C]// International Multimedia Conference on Multimedia and security: new challenges 2001: 27-30.
[4] ZHANG Tao, PING Xijian. A new approach to reliable detection of LSB steganography in natural image [J]. Signal Process, 2003, 83(10): 2085-2093.
[5] QUACH T T. On locating steganographic payload using residuals[J]. SPIE Media Watermarking, Security, and Forensics III, 2011,7880: 78800J1-7.
[6] DAVIDSON I, PAUL G. Locating Secret Messages in Images[C]// Tenth ACM SIGKDD international conference on Knowledge discovery and data mining ,2004:545-550.
[7] AGAIAN S S, BENJAMIN M R, Glenn B D. Steganalysis using modified pixel comparison and complexity measure[J]. SPIE Security, Steganography, and Watermarking of Multimedia Contents VI, 2004, 5306.
[8] KONG Xiangwei, LIU Wenfeng, YOU Xingang. Secret message location steganalysis based on local coherences of hue[M]. Advances in Multimedia Information Processing-PCM 2005, 2005, 3768: 301-311.
[9] KER A D. Locating steganographic payload via WS residuals[C]// the 10th ACM Workshop on Multimedia and Security, 2008:27-32.
[10] FRIDRICH J，GOLJAN M. On estimation of secret message length in LSB steganography in spatial domain[J]. SPIE Security, Steganography, and Watermarking of Multimedia Contents VI,2004, 5306:23-34.
[11] KER A D，LUBENKO I. Feature reduction and payload location with WAM steganalysis[J]. SPIE Media Forensics and Security XI, 2009, 7254:0A01-0A13.
[12] YI Luo, LI Xiaolong, Yang Bin. Locating steganographic payload for LSB matching embedding[C]// IEEE International Conference on Multimedia and Expo (ICME), 2011, 1-6.
[13] QUACH T T. Optimal cover estimation methods and steganographic payload location[J]. IEEE International Conference on information Forensics and Security, 2011, 6(4): 1214-1222.
[14] QUACH T T. Locating payload embedded by group-parity steganography[J]. Digital Investigation, 2012, 9(2):160-166.
[15] KER A D, BÖHME R. Revisiting weighted stego-image steganalysis[C]// SPIE Security，Forensics，Steganography and Watermarking of Multimedia Contents X, 2008, 6819:05-16.
