International Journal for Innovative Research in Science and Technology (IJIRST)
Wireless sensor network is a communication network across the sensors nodes. Sensor nodes collect information about the physical environment. Now-a-days, one main issue in wireless ad hoc sensor network is wastage of energy at each sensor nodes. Energy is the one most important factor while considering sensor nodes. Wireless sensor networks require solution for conserving energy level. One new type of attack called vampire attack, which occurring at network layer. It leads to resource depletion (energy) at each sensor nodes, by destroying battery power of any node.