Research Of Privacy Protection And Data Security For Electric Vehicles

As energy and environmental issues become more and more serious,electric vehicle technology has gradually become a hot spot for global research and attention as an important way to alleviate this problem.Large-scale electric vehicles(EVs)need to be connected to the grid(V2G)to realize the two-way interaction and exchange between the electric vehicle and the grid under controlled conditions.It is an important component of the smart grid.However,as an important application of the smart grid power distribution terminal,V2 G faces the risk of leakage when the user exchanges information with the power grid in both directions.Therefore,in order to realize safe,reliable and orderly access of electric vehicles to the power grid,and to achieve reliable communication between them,it is very important to ensure the security of information exchange between the power grid and the V2 G network.This paper has carried out the following research on the privacy and security issues existing in V2 G.First,Aiming at the privacy protection issues in the charging/discharging phase of electric vehicles,a charging and discharging privacy protection scheme for electric vehicles based on certificateless ring signcryption is proposed.The privacy protection problem of charging and discharging electric vehicles is solved from the aspects of identity information privacy and data information privacy.The theory proves the correctness,unforgeability,anonymity and confidentiality of the scheme.Relevant experiment shows that the scheme is more efficient in implementing privacy protection,which indicates the effectiveness and feasibility of the scheme.Then,Aiming at the transient and security problems between the electric vehicles in the driving state and the grid server,the V2 G communication privacy protection scheme of the electric vehicle in combination with onion routing and certificateless signcryption technology is proposed.When the electric vehicle is in the communication coverage of the aggregation,a certificateless signcryption implementation scheme is proposed to ensure the privacy of the message;When the electric vehicle is outside the communication coverage of the aggregation,the onion routing technology is used to establish a communication link,and combined with the certificateless signcryption technology,the communication privacy is finally realized.It is theoretically proved that the scheme can meet the privacy of communication messages under the premise of fast driving of electric vehicles.Related experiments have proved that the program is highly efficient.Finally,Aiming at the security problems existing in the communication process of electric vehicles in V2 G,an electric vehicle communication scheme based on trusted computing is proposed.The electric vehicle communication is divided into two scenarios,including the communication among electric vehicles and the communication between the electric vehicle and the grid server.Electric vehicles' communication uses onion routing technology to build an anonymous communication link.And through the embedded trusted computing module to assist in the selection of communication intermediate nodes.Together with the signcryption technology,signature and encryption of communication messages are completed.The communication between the electric vehicle and the grid server completes the mutual authentication of the communication parties through the embedded trusted computing module.Through the evaluation of the safety of relevant technologies,it is proved that the proposed scheme can meet the safety requirements for electric vehicle communication.