无线通信物理层安全技术综述  

Review on Physical- Layer Security Techniques of Wireless Communications

作　　者：刘在爽[1] 王坚[1] 孙瑞[1] 王昭诚[2] 

机构地区：[1]中国电子科技集团公司第三十研究所,四川成都610041 [2]清华大学电子工程系,北京100084

出　　处：《通信技术》2014年第2期128-135,共8页Communications Technology

基　　金：保密通信重点实验室基金(No.9140C11010111C1104)~~

摘　　要：无线通信因其天然的开放性和广播性特点,总是受到窃听等安全威胁,窃听者极易通过无线信道进行非法接收。传统的安全手段多是依靠认证和密码技术,在无线通信系统上层来实施,而与物理层相对独立。近年来,以物理层的角度研究无线通信的安全性逐渐成为一个研究热点。无线通信物理层安全技术,作为传统安全体制的重要补充,能够对无线传输过程中的信息形成有力保护,有效阻止窃听者通过非法接收获取信息。对无线通信物理层安全技术进行综述,对信息理论安全原理、发射信号方式安全技术、扩频和跳频加密技术、信道编码加密技术、调制方式加密技术等几类具有代表性的物理层安全技术进行介绍和梳理,重申其重要作用和意义,最后对跨层安全设计以及动态目标防御做出展望。Due to the openness and broadcast nature of wireless mediums, wireless communication is always vulnerable to potential security threats such as eavesdropping, since unauthorized receiving is facilitated through wireless channels. Traditional system security is always implemented in the higher layers of the com- munication protocol stack, relying on authentication and cryptography, but independent of the physical lay- er. However, in recent years, wireless communications security gradually becomes a hot research topic from a physical layer perspective. As an important complement to the traditional security mechanism, the physical layer security technique can protect the information over wireless transmission and prevent the unauthorized from illegally receiving and extracting confidential messages. This paper makes a review on the physical layer security techniques, and introduces several representative paradigms, including principle of information theo- retic security, transmit-signal security techniques, spread spectrum and frequency-hopping encryption tech- niques, cryptosystem based on channel coding, modulation encryption techniques and so on. Finally the orosoects of cross-laver security design and moving target defense are also described.

关 键 词：无线通信 物理层 安全 加密 信息理论安全 

分 类 号：TN918[电子电信—通信与信息系统]