Abstract: As for the conventional intrusion detection technology in wireless sensor networks which can not adapt to the characteristics of dynamic property and limited resources, the artificial immunity theory and the multiagent technology are combined together, and a new intrusion detection mechanism(IMAIDM) for clustered wireless sensor networks is proposed. The description of an immune multiagent model, the definition of the multiagent function and the relevant algorithms are given. The experiments show that IMAIDM possesses a higher detection rate, better selfadaptability and lower energy consumption feature.

Key words: WSN, intrusion detection, artificial immunity, multiagent