Research On Blockchain-based Access Control Of Vehicular Data

The vehicle obtains the data collected by the sensor nodes,combining with the information obtained by other nodes in VANET,to achieve safe driving.Announcement messages are sent in VANET,collected by mobile vehicles,uploaded to the cloud server for storage,and provided to other vehicles for reference.However,in an open cloud environment,plaintext is easily tampered with maliciously,and may also be accessed by unauthorized users.At present,ABE scheme in VANET is the research direction of many traditional vehicular data storage schemes,and these schemes are faced with centralization of data storage or centralization of audit members in the later.The blockchain technology not only has high security,but also has relatively efficient performance.Decentralized blockchain nodes can avoid this drawback.However,the existing schemes still have some problems of security and efficiency using blockchain in VANET.Therefore,this paper proposes a blockchain-based vehicular data access control scheme,and has achieved the following research results:1)Designing a new blockchain-based ABE scheme in VANET,this scheme improves the security and the efficiency of the storage scheme,and prove the feasibility for making up for the shortcomings in the traditional scheme.According to experimental results,the vehicle’s encryption and decryption time cost of this scheme is greatly reduced,and the data security is better than the traditional ABE scheme.2)Constructing a transaction-based access control scheme using the transactions in the blockchain,this scheme achieves improving efficiency of the audit and computing comparing with the existing cloud storage schemes.This scheme improves the auditing capabilities of blockchain-based vehicle data sharing.In the random oracle model,there is the security of this scheme having been proved.Based on the unforgeability of the blockchain,the unforgeability of the audit in this scheme can be realized.According to experimental results,the audit capability and security of this scheme is better that traditional schemes.