Date Added: Jul 2012
Wireless sensor network has been grown as hottest research area for past few years. They have extensive applications; there are various areas in wireless sensor networks on which researchers are working. The area which have gain attention of almost every researcher is security, security of wireless sensor network has become very important since once deployed these networks are unattended and unprotected. As security playing very important role in it, to provide better security algorithms nature of attack should be known and the type of parameter on which it affects most should be considered. Sensor networks are vulnerable to various attacks like sink hole attacks, black hole attacks, wormhole attacks and selective forwarding attacks.