Secret Key Agreement From Vector Gaussian Sources by Rate Limited Public Communication

Authors:
S. Watanabe;Y. Oohama
Affiliations:
Dept. of Inf. Sci. & Intell. Syst., Univ. of Tokushima, Tokushima, Japan;-
Venue:
IEEE Transactions on Information Forensics and Security - Part 1
Year:
2011

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Cited 1

Limitations of generating a secret key using wireless fading under active adversary

IEEE/ACM Transactions on Networking (TON)

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Abstract

We investigate the secret key agreement from correlated vector Gaussian sources in which legitimate parties can use public communication with limited rate. For the class of protocols with one-way public communication, we show that the optimal trade-off between the rate of key generation and the rate of the public communication is characterized as an optimization problem of a Gaussian random variable. The characterization is derived by using the enhancement technique introduced by Weingarten for multiple-input-multiple-output (MIMO) Gaussian broadcast channel.