基于物理信道和编码的无条件安全通信系统关键技术研究

项目名称： 基于物理信道和编码的无条件安全通信系统关键技术研究

项目编号： No.61271172

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 无线电电子学、电信技术

项目作者： 文红

作者单位： 电子科技大学

项目金额： 84万元

中文摘要： 从理论上来说：传统的采用预先共享密钥的方式来实现"加密"的技术都是可破的，其秘密的强度依赖于攻击方计算资源和时间的有限性假设。物理层信息"加密"技术方式，秘密信息发送方和接收方不需要预先共享密钥，利用无线信道特性的多变和随机特征实现物理层的"加密"，该技术实现了香农"一次一密"的思想，因此其具有不可破的特性。物理层信息安全技术的研究从理论上来说是探索香农"一次一密"解决思路的新出发点；从应用来说是解决无线安全问题的新途径。 本项目展开无线通信系统的物理层"加密"通信系统关键技术的研究，研究内容包括：1. 提出物理层"加密"的无线通信系统的系统模型；2. 分析该无线通信系统模型的安全性和传输效率，给出关于物理层"加密"无线通信系统的容量限分析模型；3.开展趋近容量限的物理层 "加密"的秘密编码技术研究。

中文关键词： 物理层；安全；无线通信；加密传输；多天线

英文摘要： Traditionally, security is viewed as an independent feature addressed above the physical layer, and all widely used cryptographic protocols (e.g., AES) are designed and implemented with a pre-shared secret key, which can be broken if the computing time and sources are unlimited. A physical-layer (PHY) transmission with built-in security refers to as a transmission with a guaranteed property of the low-probability-of-interception (LPI) in the aspects of modulation, signal, and diversity channel, without resorting to source data encryption and a shared secret key, which is an effective approach to realize the Shannon's "Perfect Secrecy" theory (also called one time pad). Therefore, this approach is character as "unbroken" even if the eavesdroppers with unlimited resources and it is an effective approach in resolving the boundary, efficiency and link reliability issues in wireless communication networks. The project will research the key technologies of physical-layer security communication systems. The following three goals should be achieved in this project: (1) building enhance almost perfectly unconditional secure communication via channel characteristic approach; (2) the theory research of unconditional (perfect) secure communication system-bound and security evolution method; (3) construction the security cod

英文关键词： Physical layer；Security；wireless communication；Encrypted transmission；MIMO