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Impact of realistic propagation conditions on reciprocity-based secret-key capacity

par Rottenberg, François ;De Doncker, Philippe ;Horlin, François ;Louveaux, Jérôme
Référence (31 August - 3 September, 2020: Virtual Conference), Proc. of the IEEE International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC)
Publication Publié, 2020-08

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Résumé :

Secret-key generation exploiting the channel reciprocitybetween two legitimate parties is an interesting alternativesolution to cryptographic primitives for key distribution inwireless systems as it does not rely on an access infrastructureand provides information-theoretic security. Many works in theliterature assume that the eavesdropper gets no side informationabout the key from her observations provided that: (i) it is spacedmore than a wavelength away from a legitimate party and (ii) thechannel is rich enough in scattering. In this paper, we show thatthis condition is not always verified under realistic propagationconditions and we study the resulting secret-key capacity.