Lightweight Security and Privacy-Preserving Scheme for V2G Connection

Vehicle-to-grid (V2G) connection allows electricity exchange between electric vehicles (EVs) and grid, i.e., EVs are used as temporary storage for extra generated power. However, V2G connections suffer from certain security threats, such as EV's privacy and authenticating it to grid. In this paper, we propose a lightweight secure and privacy-preserving V2G connection scheme, in which the power grid assures the confidentiality and integrity of exchanged information during (dis)charging electricity sessions and overcomes EVs' authentication problem. The proposed scheme guarantees the financial profits of the grid and prevents EVs from acting maliciously. Meanwhile, EVs preserve their private information by generating their own pseudonym identities. In addition, the scheme keeps the accountability for the electricity-exchange trade. The simulation results show that the proposed scheme significantly reduces the total communication and computation load for V2G connection especially for EVs.