流媒体信息隐藏的时空概念模型及其应用方法的研究

Transmission security of network information has become the essential issue affecting national security, economic prosperity, individual interests and social stability. Information Hiding, following Cryptography, is an burgeoning information security technology. And covert communication based on network streaming media is becoming the new research hotspot. There are limited works on theoretical model of information hiding currently. This project focuses on features of network streaming media, engaging in improving capacity, concealment and synchronization efficiency of the covert communication based on the network streaming media. It can guide the engineered research on VoIP-based covert communication, by establishing space-timing model of information hiding on network streaming media. The specific research includes: Establishing the space model of information hiding on network streaming media characterizing the structure of streaming media packetwith multi-dimensional hiding features; Establishing the timing model describing the dynamic and discrete natures of information hiding on streaming media; Studying the implementation approaches in use of spatial and temporal models, developing a VoIP covert communication system with high hiding capacity, imperceptibility and synchronization efficiency, and prototyping and demonstrating the space-timing model.

-网络信息传输安全已经成为影响国家安全、经济发展、个人利益和社会稳定的重大问题。信息隐藏是继加密技术之后一种新兴信息安全技术，而基于流媒体的隐蔽通信技术成为当前研究热点。本项目针对流媒体信息隐藏的特点，以及信息隐藏理论模型比较缺乏现状，以提高基于流媒体隐蔽通信的隐藏容量、隐蔽性和同步效率为研究目标，建立流媒体信息隐藏的时空概念模型，指导基于VoIP的隐蔽通信实际研发。研究内容包括：建立流媒体信息隐藏的空间概念模型，用来刻画流媒体分组结构多维隐藏特征的特点；建立流媒体信息隐藏的时域概念模型，用来刻画流媒体信息隐藏的动态性和离散化的特点；研究时空概念模型在VoIP隐蔽通信的应用方法，研发一套高隐藏容量、高隐蔽性和高同步效率的VoIP隐蔽通信系统，并对时空概念模型进行实际验证和应用示范。

随着以互联网为标志的网络时代的到来和以电子商务为代表的网络经济的兴起，网络信息传输安全已经成为影响国家安全、经济发展、个人利益和社会稳定的重大问题。信息隐藏是继加密技术之后一种新兴信息安全技术。本项目以流媒体多维隐藏空间模型为研究对象，解决流媒体信息隐藏中的隐藏容量、隐蔽性和同步性等关键问题，实现一套基于网络流媒体的隐蔽通信原型系统，验证了理论成果的有效性。完成的研究内容有：流媒体信息隐藏的时空模型、隐蔽性优化算法、信息隐藏检测关键技术等。本项目发表学术论文20篇，其中SCI收录10篇，EI收录5篇；申请技术发明专利3项，获得国内学术会议优秀论文2篇；省部级科技成果2等奖1项（第1完成人）；研发了基于VoIP的信息隐藏软件原型。本项目的研究成果极大地推动信息隐藏技术应用的基础研究。