International Journal of Computer Science and Information Technologies
A Wireless Sensor Network (WSN) is a group of sensor nodes cooperating to form a network over a wireless link based on zero fixed network infrastructure. The main idea is to make sensor node cheap and easily deployed everywhere to create an omnipresent network with smart geographical distribution.WSN become demanding because of its service towards wide range of applications. But constraints are with WSN like, low computation capability, small memory, limited energy, susceptible to physical capture, lack of infrastructure etc. However along with such constraints, due to operation of sensors round the clock in harsh uncontrolled environment make security as a critical issue and challenge.