Research on a Cross-Domain Authentication Scheme Based on Consortium Blockchain in V2G Networks of Smart Grid

As an important part of the smart grid, the Vehicle-to-Grid (V2G) can provide various auxiliary services for the power grid and promote the use of renewable resources. However, there are various kinds of attacks in the V2G network. Based on consortium blockchain, this paper proposes a cross-domain authentication scheme for the security threat in the V2G network. This paper designs the trust model and the system architecture, and describes the scheme in detail. The signature and authentication of the scheme adopt the SM9 identity-based cryptographic algorithm. This scheme utilizes the fact that block chain technology is not easy to tamper with. It uses a hash algorithm to verify the certificate, reducing the number of public key algorithm signatures and verifications, making the solution efficient and scalable. The introduction of block chain technology provides new ideas and methods for solving the security problems in the Smart Grid.