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Abstract
Wireless sensor networks (WSNs) have become one of the most promising and interesting areas over the past few years. Security is one of the most important properties of wireless sensor networks, which are threatened by varied attacks, to approach practical deployment. Intrusion detection technology is a positive method to defense against security threats in wireless sensor networks. Construct security ontology according to the features of WSN to represent the formal semantics for intrusion detection. The ontology is used to improve the process intrusion detection for WSN. propose an energy efficient routing method in an environment where both Attack detection and prevention schemes are used in WSNs. used to Intrusion Detection Efficient Routing Algorithm (IDER) For success application of ubiquitous WSN it is important to maintain the basic security. Which adopts the distributed architecture to monitor intrusion activities and realize abnormal events processing in local nodes? Wireless Sensor Network (WSN) is a network with large number of tiny sensor devices which are of low cost, and minimum consumption of power called as sensor nodes.