电子学报 ›› 2015, Vol. 43 ›› Issue (5): 940-947.DOI: 10.3969/j.issn.0372-2112.2015.05.017

• 学术论文 • 上一篇    下一篇

隐藏有限字符特性的跳空安全传输方法

崔波, 刘璐, 李翔宇, 金梁   

  1. 国家数字交换系统工程技术研究中心, 河南郑州 450002
  • 收稿日期:2013-11-17 修回日期:2014-07-10 出版日期:2015-05-25 发布日期:2015-05-25
  • 通讯作者: 金梁
  • 作者简介:崔波 男,1985年出生,安徽长丰人.国家数字交换系统工程技术研究中心博士,从事物理层安全、盲信号处理等方面的研究;刘璐 男,1988年出生,安徽宿州人.国家数字交换系统工程技术研究中心博士生,从事物理层安全的研究;李翔宇 男,1987年出生,河南淮阳人.国家数字交换系统工程技术研究中心博士生,从事物理层安全的研究.
  • 基金资助:

    国家自然科学基金(No.61171108)

A Space Hopping Secure Transmission Method with Masked Characteristic of Finite Alphabets

CUI Bo, LIU Lu, LI Xiang-yu, JIN Liang   

  1. National Digital Switching System Engineering & Technological Research Center, Zhengzhou, Henan 450002, China
  • Received:2013-11-17 Revised:2014-07-10 Online:2015-05-25 Published:2015-05-25

摘要:

针对无线数字通信系统,从信息论角度推导了一个保障物理层安全传输的充分条件,并提出了一种隐藏有限字符特性的跳空安全传输方法.首先,在有限字符输入系统中,多天线窃听者具有离散有噪无损信道(Discrete Noisy Lossless Channel,DNLC)结构,可以恢复保密信号,致使人工噪声方法失效,因此破坏窃听者的DNLC结构是保证系统传输安全的一个充分条件.然后,利用无线信道特征的多样性和独特性,提出一种基于多输入多输出(Multiple Input Multiple Output,MIMO)系统的跳空安全传输方法,在传输信息的过程中随机切换收发天线并发送空域干扰,可以隐藏保密信号的有限字符特性并破坏窃听者的DNLC结构.最后,理论分析和仿真结果表明了该安全方法的有效性.

关键词: 无线物理层安全, 有限字符, 跳空, 离散有噪无损信道, 多输入多输出多天线窃听者

Abstract:

Addressing the wireless digital communication system,a sufficient condition to ensure the physical-layer security transmission is derived from the viewpoint of information theory,and a space hopping secure transmission method is proposed,which can mask the characteristic of finite alphabets.First,since the multi-antenna eavesdropper in the finite-alphabet-input system possesses the architecture of Discrete Noisy Lossless Channel (DNLC),it can reconstruct the secret signal and invalidate the artificial noise method.As a result,destroying the eavesdropper's DNLC architecture becomes a sufficient condition for ensuring the security of system transmission.Then,utilizing the diversity and uniqueness of wireless channel characteristics,a space hopping secure transmission method based on the Multiple Input Multiple Output (MIMO) system is proposed.It switches receiver/transmitter antennas and transmits spatial scrambling during the information transmission,which can mask the finite alphabet characteristic of the secret signal and destroy the eavesdropper's DNLC architecture.Finally,theoretical analysis and simulation results demonstrate the efficacy of the secure method.

Key words: wireless physical-layer security, finite alphabet, space hopping, discrete noisy noiseless channel (DNLC), multiple input multiple output multiple-antenna eavesdropper (MIMOME)

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