Blockchain-Based Efficient Cross-Domain Access Control System for Autonomous Vehicle Data Sharing

Autonomous driving requires the cooperation between vehicles and vehicle to infrastructures, a substantial amount of data is continuously being generated and shared to support intelligent transportation. It is necessary to apply strict and flexible access control mechanisms to protect data privacy in such complex scenarios. However, traditional centralized architecture cannot efficiently handle the usage and authorization of autonomous vehicle data. To prioritize the data sharing among multiple companies that do not fully trust each other, we propose a blockchain-based efficient cross-domain access control system named BAAC. It integrates the attribute-based access control model and blockchain for secure and flexible data sharing. Firstly, entity attributes are divided into public attributes and private attributes to provide fine-grained access control. Besides, several smart contracts are designed to efficiently distribute and manage cross-domain attributes, and the data access history is recorded asynchronously on the blockchain. Due to the instability of the real network, a dynamic routing mechanism that distributes data access requests to different blockchain nodes is designed to further improve system efficiency. Compared with classical blockchain-based access control systems, the experimental results show that the proposed system can solve the trust issue and well-support cross-domain data sharing.