Research Of Used Car Information Sharing Scheme Based On Blockchain

With the rapid development of China’s economy,the popularity of cars is gradually increasing.China’s car market is developing rapidly,and the used car trading market is becoming more and more prosperous.However,some car owners conceal the true situation of the car and the car in the process of used car transaction.The unverifiable situation and the untrustworthiness of automobile testing agencies hinder the transaction of used cars.Therefore,in order to establish a used car trading market with transparent car conditions and data circulation,the key is to break the car data barrier between car institutions and car owners,and achieve seamless,efficient and extensive car data sharing.The technical characteristics of the blockchain can well solve the problems faced in the field of item traceability and data sharing,and there has been more research on the supply chain,privacy protection and identity authentication.Through the characteristics of data traceability,non tampering and decentralization,blockchain provides a good technical support for solving the problem of used car data sharing,which can effectively solve the problems encountered in the transaction of used cars.Aiming at the problems of fake used car data,difficulty in sharing,and untrustworthy tripartite institutions,this study combines blockchain technology to carry out the following work research.1.Proposes a verifiable used car information sharing scheme based on blockchain.The solution uses distributed key generation technology to issue keys to major automobile organizations and users;implement on-chain and off-chain distributed storage on the car data storage,store data hashes on the chain,and off-chain distributed databases to store complete vehicle data information,And the on-chain hash is responsible for verifying the authenticity of the data.Safety analysis and experimental simulation have verified the feasibility and effectiveness of the proposed scheme:the scheme can effectively verify the condition information of used cars,and the throughput rate of the system can also adapt to the current car market with burst of car data,which provides a reference scheme for establishing a transparent and fair second-hand car market in the future to a certain extent.2.Proposes a searchable and encrypted used car information sharing scheme based on blockchain.The scheme uses blockchain to store car data,uses searchable encryption technology to protect users’ query privacy,and authorities use smart contract to interact with blockchain;Users can verify the authenticity of the car data by verifying and comparing the car data with the hash value fed back by the authority.Security analysis and simulation experiments show that the scheme can effectively avoid malicious attacks on the database,data tampering and authority denying data retrieval results,and the efficiency of security index generation can also meet the requirements of the real scene under the condition of ensuring system security.