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Secret key agreement from vector Gaussian sources by rate limited public communication

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2 Author(s)
Shun Watanabe ; Department of Information Science and Intelligent Systems, University of Tokushima, 2-1, Minami-josanjima, 770-8506, Japan ; Yasutada Oohama

We investigate the secret key agreement from correlated vector Gaussian sources in which the legitimate parties can use the public communication with limited rate. For the class of protocols with the 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 et. al. for MIMO Gaussian broadcast channel.

Published in:

2010 IEEE International Symposium on Information Theory

Date of Conference:

13-18 June 2010