Recommender Credibility-Based Trust Model for Secure V2X Communication

An Intelligent Transportations System (ITS) can realise a sustainable transportation system by alleviating traffic congestion and offering a safe travel experience. V2X communication is the backbone of an ITS because it enables the exchange of information between vehicles and ITS entities. Despite the vast potential applications of V2X communication, its open wireless nature makes it susceptible to attacks. An attack by a malicious user in a delay-sensitive V2X network can have fatal consequences. Although cryptographic solutions offer robust security against external attacks, they fail in the case of inside attackers. Consequently, it is necessary to supplement cryptographic solutions with trust-based models to secure the highly vulnerable V2X networks. This paper suggests a recommender credibility-based trust model for better trust calculation for detecting and consequently avoiding communication with malicious nodes. The proposed model keeps track of previous node misbehaviours and filters bogus recommendations received from malicious nodes for enhancing the security of V2X communication. The performance of the proposed model is compared with the existing model in terms of PDR and FNR.