Proposing a centralized trust management system to detect compromised node in WSN

Routing attacks are one of the most common attacks in which the attacker can make disorders in wireless sensor network communications. In order to confronting these attacks, encryption methods are not enough because compromised node, have access to the secret information and can go across the traditional methods. At this time, the most effective way to confront these attacks in WSNs is to use trust management systems. Different trust systems have been proposed to reduce the effect of routing attacks, but most of them could not determine the malicious node effectively and some of them suffer from the attacks on the system. In this paper, we propose a centralized trust management system which is not only resistant against routing attacks but also against the trust system attacks, too. This method does not need any time synchronization and location information of node. Performance of this method has been evaluated by some simulations in Opnet environment.