Blockchain Based Trust Management in Vehicular Networks

Abstract

The development of Vehicular Networks (VANETs) is facing great challenges. In the open environment of VANETs, the fake information sent by malicious vehicles not only affect the fairness of information interaction, but also threaten the driving safety of normal vehicles seriously. Therefore, the study of trust evaluation and management in VANETs has become hot topics in recent years. This paper proposes a trust management model of VANETs based on blockchain. In this model, a Hidden Markov Model (HMM) based vehicle trust evaluation method is proposed, which can improve the accuracy for the detection of malicious behavior. Besides, we propose a trust management method based on alliance chain, which can greatly improve the efficiency of trust updating and querying on the premise of security. The results of comparative experiments show that the model is feasible and effective in the aspects of trust evaluation and trust management.