电讯技术2018，Vol.58Issue(3)：313-319,7.DOI:10.3969/j.issn.1001-893x.2018.03.013
一种OFDM系统信道密钥生成方法
A Channel Frequency Response Based Secret Key Generation Method in OFDM Systems
摘要
Abstract
This paper proposes a method for channel key generation in Orthogonal Frequency Division Mul-tiplexing(OFDM) systems through exploiting channel frequency response(CFR),quantization,reconcilia-tion,confirmation and privacy amplification. Firstly,by utilizing the advantage of multi-carrier,channel characteristics are extracted in subchannels and quantization.Then,sliding window key generation mecha-nism and segment checking are used for initial channel key generation.The reconciliation process is accom-plished efficiently with one single location interaction.Finally,privacy amplification function is used to gen-erate channel secret key.With the proposed method,a large number of key bits are generated through the sliding window,multi-round reconciliation is replaced with a single round reconciliation,and limitting the maximum length of initial key makes initial key kept random both in length and information.关键词
正交频分复用系统/信道密钥/频率响应/滑窗/隐私放大Key words
OFDM system/channel secret key/channel frequency response(CFR)/sliding window/privacy amplification分类
信息技术与安全科学引用本文复制引用
赖凤麟,姜永广,咸立文,张桂祥..一种OFDM系统信道密钥生成方法[J].电讯技术,2018,58(3):313-319,7.
