Blockchain-Based Internet Of Vehicles Authentication Scheme

With the gradual intelligence and dataization of new energy vehicles,traditional fuel vehicles will be gradually replaced in the next few decades.New energy vehicles are not only green and environmentally friendly,but also can effectively relieve urban traffic pressure after the introduction of intelligent transportation systems,and provide drivers and pedestrians with a safer guarantee.As an important part of the intelligent transportation system,Vehicular Ad-Hoc Networks(VANETs)can not only provide comfortable services when the vehicle is running,for example preventing collisions and reducing traffic congestion and so on.Moreover,it can prevent some malicious opponents’ attacks,such as message tampering,replay,eavesdropping,identity forgery and so on.In view of the above data security issues and how to further improve communication efficiency,this article proposes two safe and efficient solutions:Existing Io V authentication and key agreement schemes are mostly based on key agreement between a trusted third party(Trusted Third Party,TTP)and the vehicle to create a session key.But systems that rely too much on TTP may suffer from single points of failure and redundancy when TTP sends the same information to multiple vehicles.Aiming at such problems,this article proposes an identity-based anonymous group key distribution scheme,using aggregated signatures and an improved multi-receiver encryption scheme to realize two-way authentication and group sessions between Road Side Units(RSUs)and vehicles Distribution of keys.During the key distribution process,only one encryption of data is required to allow all group members to obtain a consistent session key.Finally,the formal security proof shows that this scheme is safe.At the same time,through performance analysis and comparison,the communication and computing costs of this scheme have greater advantages compared to other schemes.Aiming at the complex scene where vehicles switch between different RSUs,this article proposes a blockchain-based cross-domain handover authentication scheme.When the vehicle travels to another RSU domain,the mutual authentication between the two entities is realized with the help of digital signature,chameleon signature and blockchain technology.The trusted organization uses the secret value stored in the vehicle to calculate the polynomial and distribute the group session key to a group of legitimate vehicles,so as to improve the efficiency of group communication.The security proof shows that the proposed scheme is safe and has lower overhead in computation and communication than similar Io V handover authentication schemes.