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无线通信物理层安全方法综述
引用本文:胡爱群,李古月.无线通信物理层安全方法综述[J].数据采集与处理,2014,29(3):341-350.
作者姓名:胡爱群  李古月
作者单位:东南大学信息科学与工程学院
摘    要:随着无线终端数目的急剧增加以及无线网络的开放性,无线通信的安全问题面临着严重的挑战。与传统加密方法不同,无线通信物理层安全方法从信息论的角度出发,旨在实现无条件安全。本文回顾了Shannon建立的无线通信物理层安全模型,并着重回顾了由Wyner引导的无密钥安全和由Maurer引导的基于无线信道密钥的两大物理层安全分支的发展。其中前者通过波束形成或人工噪声的方法增加合法信道和窃听信道之间的差距;后者则利用无线信道的特性,将其作为产生密钥的天然随机源。在第五代移动通信方式下,物理层安全可以实现轻量级的加解密技术,解决传统加解密延时过长的问题。然而虽然物理层安全的理论研究已日趋成熟,该领域在实际应用中仍有很多问题亟待解决。

关 键 词:物理层安全    多径衰落  协作通信    人工噪声    密钥生成  

Physical layer security in wireless communication: A survey
Hu Aiqun,Li Guyue.Physical layer security in wireless communication: A survey[J].Journal of Data Acquisition & Processing,2014,29(3):341-350.
Authors:Hu Aiqun  Li Guyue
Affiliation:School of I nformation Science and Engineering, Southeast University
Abstract:With the rapid increase of wireless devices and the openness of wireless communication, the security problem becomes more and more serious and challenging. Different from traditional key-based cryptography schemes, physical layer security has been proposed to realize unconditional security from the information theory perspective. This paper provides a review of the model of physical layer security built by Shannon and tracks the evolution of security schemes without key leaded by Wyner and secret key-based secrecy schemes leaded by Maurer. Among them, the former aims at widening the channel quality gap between the authorized user and the eavesdropper; while the latter using the wireless channel as a nature random source exploiting the channel characteristics. In the coming fifth generation mobile communication scheme, physical layer security can match it with a lightweight security technology which avoids the long delay in the traditional cryptography. Although the theoretical studies of physical layer security have become maturity, they still face many practical problems to be solved in practical.
Keywords:physical layer security  multipath fading  cooperative communication  artificial noise  key generation
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