基于协作的信息论安全密钥生成策略和方法研究

项目名称： 基于协作的信息论安全密钥生成策略和方法研究

项目编号： No.61471334

项目类型： 面上项目

立项/批准年度： 2015

项目学科： 无线电电子学、电信技术

项目作者： 戴旭初

作者单位： 中国科学技术大学

项目金额： 80万元

中文摘要： 密钥生成是现代密码学的核心问题之一。基于Shannon信息论安全准则设计的密钥，称之为信息论安全密钥，其具有理论上的绝对安全性。通过多节点协作，能够有效地改善信息论安全密钥的生成效率，提高可达的密钥速率和密钥容量，这是当前信息论和信息安全研究领域的前沿课题。 本项目将针对典型的理论网络模型，利用信源信号的相关性和信道质量的差异性，设计基于多节点协作的信源编码方法和信源信道联合编码方法，研究协作密钥生成的协商策略和实现方法，并利用信息论的基础理论和工具，分析其可达密钥速率和密钥容量，以揭示协作对提升密钥速率和密钥容量的机理和关键因素。进一步，将理论模型拓展到实际的无线协作通信场景，研究利用物理层无线信道资源实现密钥生成的途径和方法，探寻理论研究结果的工程应用价值，为实际无线协作通信网中的密钥生成提供理论依据和可行的方案。

中文关键词： 信息论安全；密钥生成；协作策略；密钥容量

英文摘要： Key generation is one of the crucial issues in modern cryptography. A key generated according to the criterion of Shannon's information-theoretic security is called as the information-theoretic key, and it is absolutely secure in principle. Using cooperation among multiple nodes can effectively improve the efficiency of information-theoretic key generation and enhance achievable key rate and key capacity, which is a frontier topic in areas of information-theoretic security. In this proposal, for the typical networks models, we are concerned about the cooperative source coding schemes and source-channel coding schemes based on utilizing the correlation between source signals and the differences of channel qualities.In addition, we will study agreement strategies and implementation methods of key generation, and use information theoretic tools to analyze the corresponding secret key rate and key capacity, whose goal is to reveal the mechanism and crucial factor of cooperation in enhancing secret key rates. Furthermore, the theoretical models is extended to the practical cooperative wireless networks, and novel approaches and methods of key generation will be investigated through using resources of physical-layer wireless channels, which explores the engineering application value of theoretical results and provides the theoretical foundation for key generation in practical cooperative wireless networks.

英文关键词： information theoretic security;key generation;cooperative strategy;key capacity