Reciprocity-Diversity Trade-off in Quantization for Secret Key Generation

被引：0

作者：

Tunaru, Iulia ^{[1
]}

Denis, Benoit ^{[1
]}

Uguen, Bernard ^{[2
]}

机构：

[1] CEA Leti, Minatec Campus,17 Rue Martyrs, F-38054 Grenoble 9, France

[2] Univ Rennes 1, IETR, CNRS UMR 6164, F-35042 Rennes, France

来源：

2014 IEEE 25TH ANNUAL INTERNATIONAL SYMPOSIUM ON PERSONAL, INDOOR, AND MOBILE RADIO COMMUNICATION (PIMRC) | 2014年

关键词：

Quantization; Secret Key Generation; Reciprocity; Channel Impulse Responses; Ultra Wideband; Physical Layer;

D O I：

暂无

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

Symmetric secret key generation from physical layer measurements has recently emerged as an alternative to computationally secure protocols or predistribution techniques for key sharing. This new approach takes advantage of the intrinsic properties of radio channels (e.g. reciprocity and spatial decorrelation) by quantizing measurable channel characteristics into a suite of codewords. However, noise or other transmission artifacts can degrade the link reciprocity and lead to bit errors between the users' codewords, which are strongly related to the quantization thresholds. In this paper, we present a framework for quantization in the context of key generation. In order to find a trade-off between reciprocity (an indicator of robustness) and codeword diversity (an indicator of randomness) under a fixed-length constraint, we investigate the non-uniform quantization and we show the interest of optimizing the quantization thresholds as a function of the signal-to-noise ratio.

引用

页码：134 / 138

页数：5