부산대학교 도서관

Empowered by 5G communication technology, high-speed information exchange can be realized on the Internet of Vehicles (IoV) for intelligent transportation applications. Since most applications require vehicles to report perceived information to nearby base stations, how to defend against malicious attacks and selfish behaviors of vehicles in reporting activities has become an essential security issue. Some researchers have attempted to encourage vehicles to actively report information by establishing reputations for them, but these efforts have some shortcomings. In model design, they neither verify the basis and process of reputation evaluation nor pay attention to the diversity and intelligence of vehicle behaviors. In system construction, they fail to meet the management needs of multi-party participation and provide verifiable reputation management services. In this paper, we propose $\mathcal{R}$-tracing, a consortium blockchain-based vehicle reputation management scheme. The main contribution of our work lies in three points. First, a vehicle reputation model is designed with a reward and punishment mechanism and a regular tax mechanism. Second, a vehicle reputation management system is constructed by multiple organizations, in which all tasks of reputation update are abstracted into three types of transactions. Finally, the effectiveness of $\mathcal{R}$-tracing is verified by extensive simulations running on a large-scale traffic scenario and performance evaluation on a prototype system. Compared with the typical linear reputation model, our model not only resists the usual malicious attack and selfish behavior but also effectively deals with the on-off attack and rational selfish behavior. In the throughput test, $\mathcal{R}$-tracing achieves 600 tps , outperforming two state-of-the-art schemes.