Research On Secure Storage And Sharing Of Internet Of Vehicles Data Based On Blockchain And Cloud Edge Computing

Vehicles in the Internet of vehicles(IoV)environment are equipped with advanced on-board sensors and intelligent electronic equipment,and further equipped with wireless communication devices,which can effectively complete the interactive communication between members within Io V.However,Io V systems generally need to operate under the wireless network,so malicious attackers can easily intercept,modify,add and delete the transmitted data.At the same time,the centralized computing characteristics of cloud computing will aggravate the problem of uneven distribution of nodes,which will affect the acquisition of information and the transmission of data.If the data is intercepted and tampered with by others,it is very easy to lead to traffic accidents and casualties in the vehicle.In view of the above security challenges,this paper proposes a secure storage and sharing scheme of Internet of vehicles data based on blockchain and cloud edge computing hybrid architecture.The main work of this paper is as follows:(1)Based on the different characteristics of private blockchain and consortiumal blockchain,the Vehicle node and roadside unit node are virtualized as the network nodes of blockchain,so that the Vehicle node and roadside unit node can transmit traffic information through private blockchain and consortiumal blockchain,so as to ensure the communication data security of Internet of Vehicles.Ordinary Vehicles will form a Vehicle network based on consortiumal blockchain,while special Vehicles will form a private blockchain alone.The combination of private blockchain and consortiumal blockchain balances the contradiction between decentralized technology and the reality of weak concentration.(2)In order to avoid the shortcomings of public key certificate,an improved identity based digital signcryption algorithm is designed,and a private key generator is introduced into the algorithm to ensure the anonymity of user identity;At the same time,in order to reduce the storage consumption caused by the excessive length of digital signature,a ring signature scheme based on discrete central binomial distribution is designed.(3)In order to solve the problem of secure storage and sharing of private sensitive data,edge computing devices are embedded in roadside units and Vehicles,which can transform the traditional form of cloud data interaction into cloud edge.Private sensitive data will be processed directly through local edge devices.If complex computing is required,it will be transmitted to the cloud through secure channels for processing.(4)In order to achieve better consensus performance in the case of more nodes,a dynamic layered practical Byzantine fault-tolerant mechanism based on reputation value is proposed to realize reputation value management,and intelligent contracts are deployed in the blockchain network,which improves the system throughput,and makes the data confirm quickly.