A multi-eavesdropper scheme against RIS secured LoS-dominated channel

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dc.contributor.authorWei, Zhuangkun
dc.contributor.authorGuo, Weisi
dc.contributor.authorLi, Bin
dc.date.accessioned2022-04-14T10:14:59Z
dc.date.available2022-04-14T10:14:59Z
dc.date.issued2022-04-11
dc.description.abstractReconfigurable intelligent surface (RIS) has been shown as a promising technique to increase the channel randomness for secret key generation (SKG) in low-entropy channels (e.g., static or line-of-sight (LoS)), without small-scale fading. In this letter, we show that even with the aid of RIS, collaborative eavesdroppers (Eves) can still estimate the legitimate Alice-Bob channel and erode their secret key rates (SKRs), since the RIS induced randomness is also reflected in the Eves’ observations. Conditioned on Eves’ observations, if the entropy of RIS-combined legitimate channel is zero, Eves are able to estimate it and its secret key. Leveraging this, we design a multi-Eve scheme against the RIS-secured LoS dominated scenarios, by using the multiple Eves’ observations to reconstruct the RIS-combined legitimate channel. We further deduce a closed-form secret key leakage rate under our designed multi-Eve scheme, and demonstrate the results via simulations.en_UK
dc.description.sponsorshipEngineering and Physical Sciences Research Council (EPSRC): EP/V026763/1en_UK
dc.identifier.citationWei Z, Guo W, Li B. (2022) A multi-eavesdropper scheme against RIS secured LoS-dominated channel, IEEE Communications Letters, Volume 26, Number 6, June 2022, pp. 1221-1225en_UK
dc.identifier.issn1089-7798
dc.identifier.issn1558-2558
dc.identifier.urihttps://doi.org/10.1109/LCOMM.2022.3166239
dc.identifier.urihttps://dspace.lib.cranfield.ac.uk/handle/1826/17770
dc.language.isoenen_UK
dc.publisherIEEEen_UK
dc.rightsAttribution-NonCommercial 4.0 International*
dc.rights.urihttp://creativecommons.org/licenses/by-nc/4.0/*
dc.subjectPhysical layer secret keyen_UK
dc.subjectreconfigurable intelligent surfaceen_UK
dc.subjecteavesdroppingen_UK
dc.subjectstatic channelen_UK
dc.subjectwireless communicationsen_UK
dc.titleA multi-eavesdropper scheme against RIS secured LoS-dominated channelen_UK
dc.typeArticleen_UK

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