A Distributed Advanced Analytical Trust Model for IoT

In order to face the security risks and challenges imposed by the openness nature of the Internet of Things (IoT), this paper proposes a distributed advanced analytical trust model based on a Markov chain. The main objective of this paper is to study, improve and adapt a distributed trust model already proposed for Vehicular Ad hoc Networks (VANETs) to the IoT context. This adaptation uses specific parameters to the IoT networks and considers all limitations of IoT devices as well as the less mobile nature of these devices than vehicles. In this model, a set of neighbor nodes organize themselves into groups to evaluate and monitor another IoT node called monitored node depending on its behavior in the network. Our model uses an estimation algorithm to remove spams provided by malicious neighbors during the process of updating the monitored node trust. The numerical results illustrate the adaptability, the robustness and the strong resistance of our adapted trust model against the dynamic behaviors of the IoT devices and against the various popular attacks related to trust.