Design Of Car Network Data Exchange System Based On Blockchain

With the sustained and rapid development of global economy and the improvement of people’s living standard,as of the first quarter of 2017,China’s car ownership has exceeded 300 million,at the same time,the incidence rate of traffic accidents and the road congestion have also increased.Traffic accidents not only cause serious road congestion,but also cause serious loss of life and properties.Therefore,how to effectively improve traffic conditions and improve traffic efficiency has become the focus of the field of intelligent transportation.As the application of the Internet of things technology in the field of intelligent transportation,vehicle networking is an important branch,which plays a role in promoting road traffic problems.However,in the process of the development of vehicle networking technology,there are still many problems to be solved,of which the safety problem of the vehicle networking is important factor restricting its development.Because the vulnerability communication environment of the vehicle networking,the network is vulnerable to be attacked,such as tampering and replay of communication information are threatening the authenticity of the message,these will cause serious consequences for the safety of vehicle networking system.In the process of vehicle running,the vehicle network nodes need frequent information interaction,so it is very important to ensure the information security.At present,the security problem of the vehicle networking has not put forward a perfect solution yet.However,the blockchain technology has emerged,providing a perfect solution to the above problems.This paper focuses on the information insecurity caused by the traditional centralized mode of the vehicle networking,a decentralized data exchange system for vehicle networking is proposed based on the research of the blockchain technology and cryptography technology.Firstly,based on the WAVE protocol’s vehicle network multicast communication,through the master-slave node communication,realized the data exchange and ensured the fast and stable communication between vehicles,and then the data exchange among the roads and the data exchange between the vehicle to road has been realized through the distributed broadcast and recording of the roadside units.In addition,digital signature technology is adopted to ensure the safe and reliable communication between the nodes of the vehicle network.Finally,the system is simulated on the Android platform,the results show that the decentralization’s characteristics of the system brings convenience for data exchange between nodes and ensure the security of data transmission,it also ensures the effective recording and storage of vehicle networking data,can provide protection for vehicle networking in information security system.