Published Paper Details:

Now a days wireless sensor networks are rapidly growing technologies that have been widely used in many applications such as emergency response, healthcare monitoring, battlefield surveillance, habitat monitoring, traffic management, smart power grid, etc. However the wireless media and resource-constraint nature of a sensor network makes it an ideal medium for malicious attackers to intrude the system. Thus providing security is extremely important for the safe application of WSNs. Various security mechanisms like cryptography, authentication, confidentiality, and message integrity, have been proposed to avoid security threats such as eavesdropping, message replay, and fabrication of messages. To establish secure communications, we need to ensure that all communicating nodes are trusted first, according to the number of packets received by sensor nodes, direct trust and recommendation trust are selectively calculated after that communication trust, energy trust and data trust are considered during the calculation of direct trust. Distributed trust model can evaluate trustworthiness of sensor nodes more precisely and prevent the security breaches more effectively. A network Controller is designed to monitor network nodes continuously and if malicious node is found then it changes the routing path. By adding network controller to this model will reduces the packet drop ratio between nodes. Hence Performance of the model increases and Simulation results of Trust models are shown in output.