Date Added: Jun 2012
Wireless Sensor Network (WSN) can provide low cost solution to variety of real-world problems. Sensors are low cost tiny devices with limited storage, computational capability and power. The authors can be deployed in large scale for performing both military and civilian tasks. Security will be one of the main concerned when they will be deployed in large scale. In wireless network however one cannot make assumption that wireless users are trusted. Malicious individuals could easily disrupt the network & is critical to protect a sensor network from such malicious attacks, which presents a demand for providing security mechanisms in the network.