网络环境中的多播隐写理论与方法研究

项目名称： 网络环境中的多播隐写理论与方法研究

项目编号： No.61472188

项目类型： 面上项目

立项/批准年度： 2015

项目学科： 自动化技术、计算机技术

项目作者： 刘光杰

作者单位： 南京理工大学

项目金额： 80万元

中文摘要： 网络环境中的多播隐写是指发送端利用网络多播通信信道，在同一载体对象中嵌入多条秘密信息，同时实现单点对多点的隐蔽通信技术。作为传统隐写技术在网络多播通信环境下的拓展，该技术面临诸如多信息联合嵌入、多接收者间信息私密性以及载体数据包丢失情形下的信息恢复等新问题。本课题在多播隐写信息论建模，安全性以及抗干扰能力分析的基础上，研究无扰环境下基于Slepian-Wolf编码器和矩阵嵌入的同步式多播隐写方法，以及基于可重叠联合编码和矩阵嵌入的异步式多播隐写方法。在分析纠删矩阵的抗扰性与嵌入失真间关系的基础上，结合无扰环境下的研究成果，研究基于联合信源信道编码的抗扰多播矩阵嵌入方法，和具有不等删除保护的多播矩阵嵌入方法。本课题可丰富当前隐写技术的研究内涵，并为基于实际网络数据流的多播隐蔽通信提供理论支持和技术保障。

中文关键词： 隐写术；多播隐写；隐写编码

英文摘要： Multicast steganography in network environment is the covert communication technology that the sender embeds multiple sercert messages into one cover object and sends them to multiple recievers simultaneously through the network multicast communication channel. As the extension of the traditional steganography technology information in network multicast communicaiton environment, it encounter many new problems such as the joint embedding of multiple informatioin, the information privacy between multiple recievers, the information recovery with the cover packets' loss and etc. On the basis of the modelling of multicase steganography based on information theory, the analysis of the security and anti-disturbance ability, the project stuides the synchronous multicast steganography method based on Slepian-Wolf encoder and matrix embedding, and the asynchronous multicast steganography method based on the overlapping joint coding under the environment without disturbance. On the basis of the analysis of the relationship between the anti-disturbance ability of the erasure matrix and embedding distortion, combining the results under the environment without disturbance, the project studies the anti-disturbance multicast matrix embedding method based on the joint source channel coding, and the multicast matrix embedding method with non-uniform erasure protection ability. The research can enrich the intension of the current steganography technology, and provide the theoretical support and technical guarantee for the multicast covert communication based on steganography in real network traffic.

英文关键词： Steganography;Multicast Steganography;Steganography Coding