Research On User Authentication And Privacy Preserving In Vehicle To Grid

Vehicle to Grid(V2G)is through the exchange of two-way information flow and electric power flow between the electric vehicle and the grid,using advanced information and communication technologies to connect isolated electric vehicles to the grid,so that electric vehicles participate in demand-side management and play the role of "cutting peaks and filling valleys." In the process of connecting electric vehicles to the grid,electric vehicle users will exchange two-way information flows with the grid,and this information will generally include the location privacy,identity privacy,electricity price information,and planned charging paths of electric vehicle users.Once the information is attacked by illegal elements,it may cause user information to be tracked,leaked or abused.Therefore,it is very important to realize the safety authentication and privacy protection of electric vehicle users connected to the power grid.Therefore,in order to ensure the safe and stable operation of the power grid,this paper has completed the following work: Firstly,a user signature scheme based on group signature is proposed for the problem of user authentication of electric vehicles connected to the power grid.At the same time,the Chinese residual theorem and a complete subtree method are used.Through theoretical analysis,it can be concluded that this solution effectively reduces the communication overhead and calculation overhead caused by the authentication process while achieving the security authentication of V2 G users.Secondly,in view of the privacy leakage problem that may occur during the connection of electric vehicles to the power grid,a privacy protection scheme for V2 G users based on full homomorphic encryption is given.Through theoretical analysis,it can be concluded that this scheme can achieve user privacy during charging and discharging.Requirements for protection.Finally,this paper implements a group signature-based V2 G user authentication scheme,and the results show that this scheme can achieve secure authentication of electric vehicles connected to the power grid.