Multi-domain Public Key Infrastructure for Vehicle-to-Grid Network

Smart grid is a modern electrical grid that utilizes Information and Communication Technologies (ICT) and information networks. Growing attraction in Electric Vehicles (EV) shall likely provide a fundamental shift not only in transportation sector but also in the existing electrical grid infrastructure. In Vehicle-to-Grid (V2G) network, participating EVs can be used to store energy and supply this energy back to the power grid when required. To realize proper deployment of V2G network, charging infrastructure having various entities such as charging facility, clearinghouse, and energy provider has to be constructed. So use of Public key infrastructure (PKI) is indispensable for provisioning security solutions in V2G networks. The ISO/IEC 15118 standard is ascribed that incorporates X.509 PKI solution for V2G network. However, as traditional X.509 based PKI for V2G network has several shortcomings, we have proposed a multi-domain PKI model for V2G network that is built on elliptic curve cryptography and a self-certified public key technique having implicit certificate. We illustrate that the proposed solutions outperform the existing ones.