Impact of HELLO flood attack on Hierarchical Routing Protocols in WSN

Wireless Sensor networks encompasses large number of micro sized sensors which are highly constrained in power thus, clustering is done in sensor networks in order to decrease delay, save power and increase throughput of the network. Such sensor networks make use of hierarchical routing protocols like LEACH, etc which suffers from serious security threats for HELLO flood attack. This paper studies this attack and analyses the influence of it on hierarchical protocols. The empirical simulation results in Matlab shows high performance metric- percentage packet delivery ratio.