Adversarial reconfigurable intelligent surface against physical layer key generation

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dc.contributor.authorWei, Zhuangkun
dc.contributor.authorLi, Bin
dc.contributor.authorGuo, Weisi
dc.date.accessioned2023-05-02T13:47:10Z
dc.date.available2023-05-02T13:47:10Z
dc.date.issued2023-04-12
dc.description.abstractThe development of reconfigurable intelligent surfaces (RIS) has recently advanced the research of physical layer security (PLS). Beneficial impacts of RIS include but are not limited to offering a new degree-of-freedom (DoF) for key-less PLS optimization, and increasing channel randomness for physical layer secret key generation (PL-SKG). However, there is a lack of research studying how adversarial RIS can be used to attack and obtain legitimate secret keys generated by PL-SKG. In this work, we show an Eve-controlled adversarial RIS (Eve-RIS), by inserting into the legitimate channel a random and reciprocal channel, can partially reconstruct the secret keys from the legitimate PL-SKG process. To operationalize this concept, we design Eve-RIS schemes against two PL-SKG techniques used: (i) the CSI-based PL-SKG, and (ii) the two-way cross multiplication based PL-SKG. The channel probing at Eve-RIS is realized by compressed sensing designs with a small number of radio-frequency (RF) chains. Then, the optimal RIS phase is obtained by maximizing the Eve-RIS inserted deceiving channel. Our analysis and results show that even with a passive RIS, our proposed Eve-RIS can achieve a high key match rate with legitimate users, and is resistant to most of the current defensive approaches. This means the novel Eve-RIS provides a new eavesdropping threat on PL-SKG, which can spur new research areas to counter adversarial RIS attacks.en_UK
dc.identifier.citationWei Z, Li B, Guo W. (2023) Adversarial reconfigurable intelligent surface against physical layer key generation. IEEE Transactions on Information Forensics and Security, Volume 18, 2023, pp. 2368-2381en_UK
dc.identifier.issn1556-6013
dc.identifier.urihttps://doi.org/10.1109/TIFS.2023.3266705
dc.identifier.urihttps://dspace.lib.cranfield.ac.uk/handle/1826/19564
dc.language.isoenen_UK
dc.publisherIEEEen_UK
dc.rightsAttribution 4.0 International*
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/*
dc.subjectEavesdroppingen_UK
dc.subjectReconfigurable intelligent surfaceen_UK
dc.subjectPhysical layer secret keyen_UK
dc.subjectWireless Communicationen_UK
dc.titleAdversarial reconfigurable intelligent surface against physical layer key generationen_UK
dc.typeArticleen_UK

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