High-rate uncorrelated bit extraction for shared secret key generation from channel measurements

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Publication Type Journal Article
School or College College of Engineering
Department Computing, School of
Creator Kasera, Sneha K.; Patwari, Neal
Other Author Croft, Jessica; Jana, Suman
Title High-rate uncorrelated bit extraction for shared secret key generation from channel measurements
Date 2010-01
Description Secret keys can be generated and shared between two wireless nodes by measuring and encoding radio channel characteristics without ever revealing the secret key to an eavesdropper at a third location. This paper addresses bit extraction, i.e., the extraction of secret key bits from noisy radio channel measurements at two nodes such that the two secret keys reliably agree. Problems include 1) nonsimultaneous directional measurements, 2) correlated bit streams, and 3) low bit rate of secret key generation. This paper introduces high-rate uncorrelated bit extraction (HRUBE), a framework for interpolating, transforming for decorrelation, and encoding channel measurements using a multibit adaptive quantization scheme which allows multiple bits per component. We present an analysis of the probability of bit disagreement in generated secret keys, and we use experimental data to demonstrate the HRUBE scheme and to quantify its experimental performance. As two examples, the implemented HRUBE system can achieve 22 bits per second at a bit disagreement rate of 2.2 percent, or 10 bits per second at a bit disagreement rate of 0.54 percent.
Type Text
Publisher Institute of Electrical and Electronics Engineers (IEEE)
Journal Title IEEE Transactions on Mobile Computing
Volume 9
Issue 1
First Page 17
Last Page 30
DOI 10.1109/TMC.2009.88
citatation_issn 1536-1233
Subject Wireless networks; Multipath fading; Physical layer; Key generation; Secret keys; Bit extraction
Subject LCSH Cryptography
Language eng
Bibliographic Citation Patwari, N., Croft, J., Jana, S., & Kasera, S. K. (2010). High-rate uncorrelated bit extraction for shared secret key generation from channel measurements. IEEE Transactions on Mobile Computing, 9 (1), art. no. 4967595, 17-30.
Rights Management (c) 2010 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE. http://dx.doi.org/10.1109/TMC.2009.88
Format Medium application/pdf
Format Extent 648,340 bytes
Identifier ir-main,11073
ARK ark:/87278/s6zw244c
Setname ir_uspace
Date Created 2012-06-13
Date Modified 2012-06-13
ID 703817
Reference URL https://collections.lib.utah.edu/ark:/87278/s6zw244c
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