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1887

access icon free Channel level crossing-based security for communications over fading channels

© The Institution of Engineering and Technology
Received 20/12/2011, Accepted 19/11/2012, Revised 27/10/2012, Published

Several key exchange methods for wireless channels have been proposed in the literature. They are referred to as physical-layer security techniques and are usually based on the channel's fading characteristics and the principle of channel reciprocity. In this study, the authors present key exchange algorithms for wireless fading channels whose operation is based on channel estimation. Specifically, the authors present a complete key exchange scheme that includes channel sampling, thresholding and error reconciliation. Two error reconciliation methods are proposed. The first one is based on neural networks and the second one is based on linear block coding. Simulations of the proposed methods’ performances and levels of security are presented and conclusions are drawn regarding their overall utility.

Inspec keywords: telecommunication computing; block codes; sampling methods; channel estimation; telecommunication security; neural nets; linear codes; fading channels

Other keywords: channel reciprocity; key exchange algorithms; channel sampling; channel level crossing-based security; error reconciliation methods; channel estimation; neural networks; wireless fading channels; linear block coding; channel thresholding; physical-layer security techniques

Subjects: Communication channel equalisation and identification; Other topics in statistics; Radio links and equipment; Codes; Neural computing techniques; Other topics in statistics; Communications computing

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