Improved Rate of Secret Key Generation Using Passive Re-Configurable Intelligent Surfaces for Vehicular Networks

The reconfigurable intelligent surfaces (RIS) is a new technology that can be utilized to provide security vehicle-to-vehicle (V2V) communications at the physical layer. In this paper, we achieve higher key generation rate for V2V lower cost and computational complexity. We investigate use of passive RIS as relay, introduce channel diversity increase (KGR), accordingly. regard, consider subsets consecutive reflecting elements instead whole in time slot, i.e., single reflector, reflectors are redirect signal receiver via beam forming. Simulations conducted different sizes RISs per RIS. From results obtained, it seen when subset entity, becomes increasingly difficult intercept eavesdropper. proposed scheme, KGR reaches up 6 bps slot.