Abstract: The demand for WSN is increasing day by day and in the deployment of WSN the most challenging issue faced is its security. Hence, there is a necessity to design and develop new secure routing solutions for WSN. This research paper discusses about different security attacks like Selective forwarding, Sinkhole, Sybil and blackhole with their impact on the Routing protocols. The effect of these attacks has been summarized. This article emphasizes on reviewing the effects of network layer attacks on Routing protocols in WSNs. A table has been presented summarizing the same.

Keywords: WSN, Routing, Security, Attacks, Sensors.