The Realization Of Vehicle Communication Security Based On Blockchain

At present,with the rapid growth of the amount of automobile in China,the safety of vehicle communication becomes particularly important.This article first embarks from the research background,expounds the development background of the Internet of Vehicles,the current IoV research progress,application security case and several key technologies of IoV.We find the vehicle communication has some potential safety hazard,a fast moving vehicle lead to frequent switching network connections,only use traditional security measures such as digital signatures and encryption can't satisfy the special safety request of the vehicle,which makes the RSU(Road Side Unit)and the OBU(On Board Unit)equipment are vulnerable to under attacks and the data and information may be stolen.Resulting in vehicle's sensitive location and privacy data leak.Since the vehicle information is centrally stored and managed in the server,once the vehicle communication data collected by the RSU of a certain road section is stolen and tampered,it will lead to the traffic chaos of that road section.Therefore,the transmission of vehicle communication data must be guaranteed to prevent malicious attacks.Secondly,this paper expounds the development course of blockchain,types and technologies,the underlying of blockchain using digital signature algorithm to make signature authentication between the message in the process of communication,each node keeps the same copy of block chain,each block header of each block link reserve the previous hash value,so if any data of block has been tampered,the hash generated by hampered data is not as same as the original data hash,in this way we can ensure the data integrity.According to the implementation technology of blockchain,it combines the characteristics of decentralized "untrusted" database,allows transactions to be conducted on the nodes of the whole network with decentralized management,and guarantees only one consensus data even at the expense of performance,thus protecting the privacy of IoV data.Therefore,blockchain technology is a potential solution for vehicle communication security.Based on the analysis of the driving condition of vehicles in real environment,this paper uses the underlying technology of public chain(Work of Proof algorithm)to build a model with a fixed number of nodes as the consensus center.Based on the above model,ieee802.11 p protocol,known as the WAVE/DSRC protocol,is adopted in this paper,which is improved based on traditional DSRC(Dedicated Short Range Communication).This protocol is created to ensure the stable communication of high-speed moving vehicle nodes.The vehicle node is taken as a driving unit and the roadside node as a acquisition and broadcast unit.The vehicle node inserts the OBU,the roadside node inserts the RSU,and the RSU acts as the consensus center of the whole network.RSU is responsible for the acquisition of vehicle communication data and broadcasts to the throughout network,and realizes block computing force competition,the RSU with strong competitiveness will broadcast generated block and complete the consensus so as to realize the data sharing.This article simulates a scenario in which data gateways assign tasks and multithread broadcast messages.Based on the function of Spring Boot to realize message broadcasting and block printing,to adjust the difficulty of mining continuously.In this paper,two-way communication between RSU nodes is realized,data information and time stamp of data generation has been saved and recorded.In the end,blocks are generated.In this way,ensuring the integrity and consensus in the process of data network transmission.