Wireless sensor networks (WSNs) are prone to most security attacks. These attacks are such as wormhole attack, sinkhole attack, selective forwarding attack, and Sybil attack. So, each layers in WSNs has some security attacks. Sensor nodes are easily susceptible to security attacks, since deployed these nodes are unattended and unprotected. Also, limited capacity of sensor nodes accounts for the security attacks on WSNs. Applications such as military surveillance, traffic surveillance, healthcare, and environmental monitoring are impacted by security attacks. Hence, researchers have created various types of detection approaches against such attacks. Selective forwarding attack is one of an attack that is not easily detected in the networks layer. In selective forwarding attack, malicious nodes function in the same way as other nodes in the networks. However, it attempts to delete or modify the sensitive information prior to transferring the packet to other node. In this poster, we proposed an approach for monitoring this type attack in wireless sensor networks.
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