Digital Logic Based Encoding Strategies for Steganography on 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
Dan Feng, Huazhong University of Science & Technology, Wuhan, ChinaFollow

Date of this Version

10-2009

Comments

Published in MM ′09: Proceedings of the seventeen ACM international conference on Multimedia October 19–24, 2009, Beijing, China, pp. 777-780. Copyright © 2009 ACM. Used by permission.

Abstract

This paper presents three encoding strategies based on digital logic for steganography on Voice over IP (VoIP), which aim to enhance the embedding transparency. Differing from previous approaches, our strategies reduce the embedding distortion by improving the similarity between the cover and the covert message using digital logical transformations, instead of reducing the amount of the substitution bits. Therefore, by contrast, our strategies will improve the embedding transparency without sacrificing the embedding capacity. Of these three strategies, the first one adopts logical operations, the second one employs circular shifting operations, and the third one combines the operations of the first two. All of them are evaluated through comparing their prototype implementations with some existing methods in a prototypical covert communication system based on VoIP (called StegVoIP). The experimental results show that the proposed strategies can effectively enhance the embedding transparency while maintaining the maximum embedding capacity.