Date Added: Nov 2011
Intrusion detection system in wireless sensor network is one of the growing research areas in recent years. Wireless Sensor Networks (WSN) consist of tiny devices. These tiny devices have limited energy, computational power, transmission range and memory. However, wireless sensor networks are deployed mostly in open and unguarded environment. Therefore, intrusion detection is one of the important aspects for wireless sensor networks. There are two different kind of intrusion detection mechanism: anomaly based and signature based. In this paper, the authors mention several attacks on WSN and they primarily focus only on the anomaly based intrusion detection system. Finally, they discuss about several existing approaches to describe how they have identified security threats and implemented their intrusion detection system.