Covert voice over internet protocol communications based on spatial model
Covert voice over internet protocol communications based on spatial model
复制标题
基于空间模型的隐蔽互联网协议语音通信
DOI：
10.1007/s11431-015-5955-4
复制
发表时间：
2016-01-01
影响因子：
4.6
通讯作者：
Tang ShanYu
中科院分区：
文献类型：
--
作者：
Huang YongFeng;Tang ShanYu
本文提出了一种新的空间隐写模型的隐蔽通信的语音互联网协议（VoIP），提供了一个解决方案的问题，增加隐藏的VoIP信道的容量，而不损害的不可见性的信道。该模型借鉴了通信领域的正交调制理论，引入了正交数据隐藏特征和数据隐藏向量两个概念来实现VoIP通信的隐蔽。针对VoIP音频流在时域上的变化特点，提出了一种隐藏向量协商机制，实现了媒体流中的动态自适应隐写。VoIP隐写实验结果表明，该隐写方法有效刻画了VoIP音频流的时空特征，增强了对隐写分析工具检测的鲁棒性，从而提高了VoIP隐蔽通信的安全性。
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 steganography in media streams. Experimental results on VoIP steganography show that the proposed 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.