Security in Wireless Sensor Networks

Wireless sensor networks (WSNs) are widely used in many applications including military surveillance, habitat monitoring, and health care.WSNs are usually composed of a large amount of sensor nodes with limited resources, and are usuallydeployed in unattended environments. In such environments, the security of sensor nodes is very important. Once a node is compromised, the adversary will disclose all the secret information stored in that node.The adversary can then use the compromised nodes to launch false data injection attacks,i.e. to inject bogus reports intosensor networks. Defending false data injection attacks is an important research issue in WSNs, because this type of attacksnot only causes false alarms that waste real-world response efforts (e.g. sending response teams to the event location), butalso may drain out the constrained resources of the forwarding sensors. To prevent such false data injection attacks several filtering method exist. We study these methods. With the rapid development of hardware and wireless network technologies, wireless sensor networks (WSNs) have been widely applied in ubiquitous computing system. Because these WSNs are often unattended when deployed in security sensitive areas such as hostile fields or homeland security operations, they are prone to capture and may have their security compromised .

Keywords:

WSN , MAC , security , sensor node