International Journal of Computer Science and Mobile Computing (IJCSMC)
Wireless sensor networks are spatially distributed autonomous sensors to monitor physical or environmental condition and to cooperatively pass their data through the network to a main location. Security is one of the most crucial and adaptive requirement for any network. When the network is defined under energy restriction, the criticality of network increases. In this paper, a study on different aspects of sensor network is defined. The paper has discussed the WSN under security requirement and associated threats. The paper has discussed some of the common attacks in sensor network.