Trust and reputation in Wireless Sensors networks

The wireless sensor networks are characterized by the infrastructure less configuring these sensors are used in different application such in defense, healthcare and in some applications that take care of the early detection of forest fires, also the wireless sensors networks can be in remote areas for long periods so because of the natural and the use of these sensors they are subject to exposure many security attacks; So the reputation-based trust systems was developed to keep the eye on the un normal activities, this paper listed the attacks that the wireless sensor networks may suffer from and listed trust models in these networks and finally the immunity of the trust models from the malicious attacks is shown.