Research On Anonymous Authentication For Electric Vehicles Dynamic Wireless Charging

With the increasing environmental pollution and the exhaustion of fossil energy,electric vehicles have been vigorously developed.The dynamic wireless charging technology enables electric vehicles(EVs)to be charged during driving through the magnetic induction between the charging pads placed under the road and the transmission coil at the bottom of the vehicle.When electric vehicles are connected to the grid during rapid movement,they need to be authenticated effectively while protecting their identity and location privacy.Compared with the conditional privacy-preserving authentication(CPPA)for message batch verification in the Internet of Vehicles(Io V),the dynamic charging of EVs is mainly aimed at service access control and vehicle-by-vehicle identity verification during the rapid movement of vehicles,as well as tracking vehicles that fail to pay on time.Therefore,the dynamic wireless charging of EVs requires that the CPPA scheme has higher efficiency,stronger security and privacy protection.This thesis designs the following CPPA schemes for the related requirements of EVs dynamic wireless charging.First,we designed conditional privacy-preserving authentication scheme with weak center for EVs dynamic wireless charging.This scheme has the following advantages:(1)A signature mechanism based on pseudo-identity is proposed,which realizes the anonymous identity authentication of EVs to charging service providers and roadside units,and protects the privacy of the vehicle’s identity.(2)Construct an identity tracking mechanism based on the threshold secret sharing technology,which realizes the true identity tracking of EVs without relying on a single authoritative center,and protects the privacy of users during the identity tracking process.(3)Design a one-time session key management mechanism based on reverse hash chain,preload enough one-time session secret keys to each charging pads every day,so that EVs and charging pads can achieve rapid identity verification,ensuring the forward security of keys and the location of EVs,and ensure the efficiency vehicle identity authentication.Second,on the basis of scheme 1,we designed a conditional privacy-preserving authentication scheme for electric vehicles dynamic wireless charging based on the Consortium Blockchain.In addition to the advantages of scheme 1,the solution also has the following advantages:(1)Propose a multi-center certificate issuance mechanism combined with threshold secret sharing technology,which enables multiple charging service providers to form an identity management alliance to achieve rapid cross-domain authentication,so that electric vehicles can enjoy the charging of all charging service providers after obtaining the certificate issued by the alliance service.(2)Blockchain is used to store pseudo-identity certificates and transaction records of vehicles,ensuring the authenticity,non-repudiation and immutability of certificates and transactions.Finally,this paper has carried out security proof and analysis for the two schemes,and proved the safety under adaptively chosen-message attacks,and can resist attacks such as counterfeiting and replay.At the same time,performance evaluation have confirmed the effectiveness of the proposed schemes.