信息网络安全 ›› 2015, Vol. 15 ›› Issue (10): 80-85.doi: 10.3969/j.issn.1671-1122.2015.10.012

• 技术研究 • 上一篇    下一篇

海上基于超短波信道特征的密钥生成技术研究

欧敏晟(), 廖巍, 袁志民, 罗旬   

  1. 海军工程大学信息安全系,湖北武汉 430033
  • 收稿日期:2015-09-06 出版日期:2015-10-01 发布日期:2015-11-04
  • 作者简介:

    作者简介: 欧敏晟(1989-),男,湖南,硕士研究生,主要研究方向:无线通信物理层安全、信道特征密钥生成;廖巍(1980-),男,湖北,副教授,博士,主要研究方向:信息安全、数据库技术;袁志民(1982-),男,河南,讲师,博士,主要研究方向:内容安全、通信安全;罗旬(1986-),男,陕西,硕士研究生,主要研究方向:网络安全。

  • 基金资助:
    湖北省自然科学基金[2015CFA066]

Research on Key Generation in Marine Environment Based on VHF Channel Characteristics

OU Min-sheng(), LIAO Wei, YUAN Zhi-min, LUO Xun   

  1. Department of Information Security, Navy University of Engineering, Wuhan Hubei 430033, China
  • Received:2015-09-06 Online:2015-10-01 Published:2015-11-04

摘要:

文章在分析无线通信系统安全问题的基础上,结合LDPC编码纠错技术,提出一种基于超短波信道特征的密钥生成技术。首先,对基于无线信道特征的密钥生成技术进行了简要介绍。然后,对无线信道的互易性进行了分析。接下来,文章提出了基于LDPC的无线密钥生成方案设计,在方案中,将密钥生成分成了信道特征预估计、信道特征提取和协商纠错三个步骤。在信道特征预估计阶段,通信双方对信道特征进行大量测试获得其统计信道特征和特征频段;在信道特征提取阶段双方在特征频段提取初始信道特征,并对信道特征进行调制;在协商纠错阶段,通信双方构造LDPC的校验矩阵,使用校验矩阵对初始信道特征进行纠错,获得一致的信道特征,并生成密钥。最后根据窃听模型,对方案的安全性进行了分析。

关键词: 无线信道特征, 密钥生成, LDPC码, 超短波通信

Abstract:

This paper analyzes the security issues of wireless communication system and proposes key generation technique based on LDPC error correction. Firstly, this paper introduces key generation based on wireless channel characteristics. Then, this paper analysis the radio channel reciprocity characteristics. Next, wireless key generation scheme based on LDPC is proposed. Key generation is divided into pre-estimate channel characteristics, characteristics extraction and negotiation correction. In the pre-estimate channel characteristics stage, communications parties test the channel characteristics. In the characteristics extraction stage, communications parties extract the initial channel characteristics from feature bands. In the negotiation correction stage, communications parties structure the check matrix. It corrects errors in the initial channel characteristics by check matrix. And then, it generates the key. Finally, this paper analysis security of scheme according to eavesdrop model.

Key words: wireless channel characteristics, key generation, low density parity check code, very high frequency communication

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