Internet of Vehicles data sharing fine-grained access control method based on blockchain

The invention discloses an Internet of Vehicles data sharing fine-grained access control method based on blockchain. The blockchain technology and the attribute encryption technology are combined andoptimized to a certain extent, so the high requirements of valuable consumption and attribute encryption on equipment performance caused by blockchain mining competition are eliminated; correspondingoptimization is carried out for an Internet of Vehicles data access scene, Internet of Vehicles equipment with different hardware performances can be compatible, and consistency service is provided for the whole network; the data sharing mode provided by the invention can be applied to massive concurrent data scenes of the Internet of Vehicles, so the problem of access congestion is effectively avoided. 本发明公开了一种基于区块链的车联网数据共享细粒度访问控制方法结合了区块链技术和属性加密技术并作出了一定的优化，消除了区块链挖矿竞争带来的无价值消耗和属性加密对设备性能的较高要求；针对车联网数据访问场景进行了相应的优化，能够兼容不同硬件性能的车联网设备，为整个网络提供一致性服务；本发明所提出的数据共享方式，可以应对于车联网的海量并发数据场景，有效避免访问拥堵的问题。