Physical Layer Security in Vehicular Networks with Reconfigurable Intelligent Surfaces

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This paper studies the physical layer security (PLS) of a vehicular network employing a reconfigurable intelligent surface (RIS).

• RIS technologies are emerging as an important paradigm for the realisation of smart radio environments, where large numbers of small, low-cost and passive elements, reflect the incident signal with an adjustable phase shift without requiring a dedicated energy source.
• Inspired by the promising potential of RIS-based transmission, we investigate two vehicular network system models: One with vehicle-to-vehicle communication with the source employing a RIS-based access point, and the other model in the form of a vehicular adhoc network (VANET), with a RIS-based relay deployed on a building.
• Both models assume the presence of an eavesdropper, to investigate the average secrecy capacity of the considered systems.