Key Generation Exploiting MIMO Channel Evolution: Algorithms and Theoretical Limits

Conference: EuCAP 2009 - 3rd European Conference on Antennas and Propagation
03/23/2009 - 03/27/2009 at Berlin, Germany

Proceedings: EuCAP 2009

Pages: 5Language: englishTyp: PDF

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Wallace, Jon W. (School of Engineering and Science, Jacobs University Bremen, Campus Ring 1, 28759 Bremen, Germany)
Chen, Chan; Jensen, Michael A. (Dept. of Electrical and Computer Engineering, Brigham Young University, Provo, UT 84602, USA)

An emerging area of research in wireless communications is the generation of secret encryption keys based on the shared (or common) randomness of the wireless channel between two legitimate nodes in a communication network. However, to date, little work has appeared on methods to use the increased randomness available when the network nodes have multiple antennas. This paper provides theoretical performance bounds associated with using multi-antenna communications and proposes two practical methods for generating secret keys exploiting the increased randomness. Performance simulations reveal the efficiency of the methods.