Abstract
Trust-based security solutions are used to improve cooperation among sensor nodes of a sensor network. Wireless sensor network (WSN) is vulnerable to internal and external attacks. Internal attacks are more severe than external attacks. Moreover, congestion in the network also reduces the performance of a network. In a sensor network, sensor nodes become congested since many packets came from other sensor nodes during the interaction process. To detect the congestion and mitigate the internal attacks from the WSN, we have proposed a Congestion Aware Trust model (CATM) for wireless sensor networks. The proposed Congestion Aware Trust model (CATM) employs a lightweight trust assessment scheme and a congestion detection scheme in a wireless sensor network. To analyze the performance of CATM, we intentionally injected some selfish nodes in the WSN. The proposed trust model feasibility has been tested with MATLAB. Simulation results are obtained in terms of trust evaluation, malicious node detection rate and malicious node false alarm rate.
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