An Adaptive Steganography Scheme for Voice over IP

Authors

Hui Tian, Huazhong University of Science and Technology, Wuhan, ChinaFollow
Ke Zhou, Huazhong University of Science and Technology, Wuhan, ChinaFollow
Hong Jiang, University of Nebraska-LincolnFollow
Yongfeng Huang, Tsinghua UniversityFollow
Jin Liu, Huazhong University of Science & Technology, Wuhan, ChinaFollow
Dan Feng, Huazhong University of Science & Technology, Wuhan, ChinaFollow

Date of this Version

2009

Comments

IEEE International Symposium on Circuits and Systems, 2009. ISCAS 2009. Copyright 2009 IEEE. Used by permission. Digital Object Identifier: 10.1109/ISCAS.2009.5118414

Abstract

This paper presents an adaptive steganography scheme for Voice over IP (VoIP). Differing from existing steganography techniques for VoIP, this scheme enhances the embedding transparency by taking into account the similarity between Least Significant Bits (LSBs) and embedded messages. Moreover, we introduce the notion of Partial Similarity Value (PSV). By properly setting the threshold PSV, we can adaptively balance the embedding transparency and capacity. We evaluate the effectiveness of this scheme with G.729a as the codec of the cover speech in StegTalk, a covert communication system based on VoIP. The experimental results demonstrate that our technique provides better performance than the traditional method.