A vehicular ad-hoc network (VANET) can improve the flow of traffic to facilitate intelligenttransportation and to provide convenient information services; where the goal is to provide self-organizingdata transmission capabilities for vehicles on the road to enable applications such as assisted vehicle drivingand safety warnings. VANETs are affected by issues such as identity validity and message reliability whenvehicle nodes share data with other nodes. The method used to allow the vehicle nodes to upload sensordata to a trusted center for storage is susceptible to security risks such as malicious tampering and dataleakage. To address these security challenges, we propose a data security sharing and storage system basedon the consortium blockchain (DSSCB). This digital signature technique based on the nature of bilinearpairing for elliptic curves is used to ensure the reliability and integrity when transmitting data to a node.The emerging consortium blockchain technology provides a decentralized, secure, and reliable database,which is maintained by the entire network node. In DSSCB, smart contracts are used to limit the triggeringconditions for preselected nodes when transmitting and storing data, and for allocating data coins tovehicles that participate in the contribution of data. Security analysis and performance evaluationsdemonstrated that our DSSCB solution is more secure and reliable in terms of data sharing and storage.Compared with the traditional blockchain system, the time required to confirm the data block was reducedby nearly six times and the transmission efficiency was improved by 83.33%.
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