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arXiv · 1312.3304

The Effect of Eavesdropper's Statistics in Experimental Wireless Secret-Key Generation

Alexandre J. Pierrot·Rémi A. Chou·Matthieu R. Bloch
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Abstract

This paper investigates the role of the eavesdropper's statistics in the implementation of a practical secret-key generation system. We carefully conduct the information-theoretic analysis of a secret-key generation system from wireless channel gains measured with software-defined radios. In particular, we show that it is inaccurate to assume that the eavesdropper gets no information because of decorrelation with distance. We also provide a bound for the achievable secret-key rate in the finite key-length regime that takes into account the presence of correlated eavesdropper's observations. We evaluate this bound with our experimental gain measurements to show that operating with a finite number of samples incurs a loss in secret-key rate on the order of 20%.

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Alexandre J. Pierrot, Rémi A. Chou, Matthieu R. Bloch. 2013-12-11. The Effect of Eavesdropper's Statistics in Experimental Wireless Secret-Key Generation. https://arxiv.org/abs/1312.3304

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