Abstract
Contactless charging is a promising technology that is gaining increased attention nowadays. Such technology enables Electric Vehicles (EVs) to wirelessly replenish their energy supply while moving over special charging pads. To cope with the high energy demand, a large number of charging pads are placed over a long distance to fulfill EV energy requests. While being an attractive alternative to conventional charging stations, dynamic contactless charging introduces major technical challenges due to the large number of vehicles being served and the high traveling speed of EVs. Specifically, it is necessary for the resource-constrained charging pads to ensure that only authorized EVs are served and to maintain a robust and transparent billing system. To tackle these challenges, we present a lightweight EV authentication protocol that enables a charging-pad to rapidly confirm the identity of an EV and validate the requested transaction. Our proposed protocol employs a PUF and LFSR-based stream cipher and enables a charging pad to authenticate an EV in just less than 0.051 ms. We further integrate the protocol with a secure and transparent energy trading system that is based on blockchain technology. Our protocol has been verified using a popular verification tool and is shown to be secure.
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