Trust Models in IoT-enabled WSN: A review

Wireless Sensor Network (WSN) enables the digital world to hear, see, and smell the physical world without the interaction of human beings. It is an essential enabler of the Internet of Things (IoT) in many domains. A WSN is a group of a large number of sensor nodes and a base station. The sensor nodes are characterized by their limited processing, storage, and communication capabilities. In addition, they might get deployed in harsh physical environments where reliability is not guaranteed. Because of that, the IoT-enabled WSNs are challenged by the need to determine the trust of the sensor nodes. Thus, many research studies considered the trust of the sensor nodes in all the IoT layers. This paper overviewed the well-known attacks in the field of IoT-enabled WSN. In addition, it reviewed the trust models in the perception and the network layers of IoT. Also, it discussed the limitations and the challenges of the existing trust models to be considered by the researchers.