부산대학교 도서관

Vehicle nodes share traffic information through broadcasting in the Internet of Vehicles. Vehicle behavior decisions and safe driving will be affected by false messages. Existing trust evaluation schemes require a lot of calculations to verify the trustworthiness of nodes for each communication, which has limitations and can not be applied to the Internet of Vehicles environment of instant communication. A vehicle node trust evaluation mechanism based on blockchain was proposed in order to catch malicious nodes efficiently and further ensure vehicle driving and information security. Firstly, the reliability of the node is preliminarily judged by querying the comprehensive trust value. Then the authenticity of the event was judged and the corresponding message trust value was calculated as the subsequent impact. Next, the comprehensive trust value of the vehicle node was maintained by using blockchain. The proof of trust was used to replace the proof of work in the consensus mechanism. Simulation experiments showed that the mechanism was feasible, it had obvious advantages in terms of precision rate and recall rate.