Research on Hybrid Trust Management Scheme for VANETs

Abstract

With the rapid development of intelligent transportation, vehicular ad hoc networks (VANETs) has broad development prospects, but also faces a variety of security threats. A distributed hybrid trust management scheme called HTMS-V is proposed for insider attackers and false message detection in VANETs. Specifically, considering the characteristics of VANETs, node trust is evaluated based on the improved subjective logic model. The evaluation combines direct trust and indirect trust, and the trust relationship between nodes is established based on interaction records. Message trust is evaluated based on node trust and the distance between nodes. And the scheme identifies false messages and malicious nodes based on the trust evaluation results. This paper tests the performance of the   HTMS-V scheme under four attack scenarios. The simulation results show that the HTMS-V scheme effectively resists various attacks in VANETs and is able to identify most false messages and malicious nodes even if the malicious node ratio reaches 40%, and the performance of the HTMS-V scheme is obviously better than that of the baseline scheme which is composed of subjective logical model and distance based weighted voting.

Keywords

• vehicular ad hoc networks (vanets); trust management; subjective logic