文章基本信息

标题：Secret Key Agreement Over Multipath Channels Exploiting a Variable-Directional Antenna
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作者：Valery Korzhik ; Viktor Yakovlev ; Yuri Kovajkin 等
期刊名称：International Journal of Advanced Computer Science and Applications(IJACSA)
印刷版ISSN：2158-107X
电子版ISSN：2156-5570
出版年度：2012
卷号：3
期号：1
DOI：10.14569/IJACSA.2012.030127
出版社：Science and Information Society (SAI)
摘要：We develop an approach of key distribution protocol(KDP) proposed recently by T.Aono et al., where the security of KDP is only partly estimated in terms of eavesdropper's key bit errors. Instead we calculate the Shannon's information leaking to a wire tapper and also we apply the privacy amplification procedure from the side of the legal users. A more general mathematical model based on the use of Variable-Directional Antenna (VDA) under the condition of multipath wave propagation is proposed. The new method can effectively be used even in noiseless interception channels providing thus a widened area with respect to practical applications. Statistical characteristics of the VDA are investigated by simulation, allowing to specify the model parameters. We prove that the proposed KDP provides both security and reliability of the shared keys even for very short distances between legal users and eavesdroppers. Antenna diversity is proposed as a mean to enhance the KDP security. In order to provide a better performance evaluation of the KDP, it is investigated the use of error correcting codes.
关键词：thesai; IJACSA; thesai.org; journal; IJACSA papers; wireless communication; wave propagation; cryptography; key distribution