Huang, Yongfeng and Tang, Shanyu ORCID: https://orcid.org/0000-0002-2447-8135 (2016) Covert Voice over Internet Protocol communications based on spatial model. Science China Technological Sciences, 59 (1). pp. 117-127. ISSN 1674-7321

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Abstract

This paper presents a new spatial steganography model for covert communications over Voice over Internet Protocol (VoIP), providing a solution to the issue of increasing the capacity of covert VoIP channels without compromising the imperceptibility of the channels. Drawing from Orthogonal Modulation Theory in communications, the model introduced two concepts, orthogonal data hiding features and data hiding vectors, to covert VoIP communications. By taking into account the variation characteristics of VoIP audio streams in the time domain, a hiding vector negotiation mechanism was suggested to achieve dynamic self-adaptive ste-ganography in media streams. Experimental results on VoIP steganography show that the pro-posed steganographic method effectively depicted the spatial and temporal characteristics of VoIP audio streams, and enhanced robustness against detection of steganalysis tools, thereby improving the security of covert VoIP communications.

Item Type:	Article
Identifier:	10.1007/s11431-015-5955-4
Additional Information:	© Science China Press and Springer-Verlag Berlin Heidelberg 2015. The final publication is available at Springer via https://doi.org/10.1007/s11431-015-5955-4.
Keywords:	covert communication, multimedia networking, VoIP, data security
Subjects:	Computing > Information security > Cyber security Computing > Information security
Depositing User:	Shanyu Tang
Date Deposited:	26 Sep 2017 11:56
Last Modified:	06 Feb 2024 15:54
URI:	https://repository.uwl.ac.uk/id/eprint/3936

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