Abstract Wireless sensor networks are prone to many vulnerabilities because of its unattended environment policy. Intrusion is one of the serious issue in wireless networks, since wireless networks are resource constrained and devising a security mechanism to counter intrusion is a challenging task. This paper focuses on building light-weight Intrusion Detection System to counter the routing attack, by identifying the malicious nodes at the earliest point. The proposed scheme namely Fuzzy Based Merkle Technique applies fuzzy logic to identify the malicious nodes and builds a light-weight Intrusion detection system and adapts Merkle tree approach for building the network. The proposed scheme is efficient in identifying the malicious nodes with minimum energy consumption and less communication overhead than the existing Merkle technique. Network Simulator 2 is used to simulate the Intrusion Detection System (IDS) and the results are verified.

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[20] Zadeh L., “Fuzzy Sets,” Information and Control, vol. 8, pp. 338-353, 1965. FBMT: Fuzzy Based Merkle Technique for Detecting and Mitigating Malicious ... 1113 Ranjeeth Kumar Sundararajan started the basic degree in computer science in Jawahar Science College, Neyveli, Tamilnadu, India. He completed his Master degree in computer technology from Coimbatore Institute of Technology, Coimbatore, Tamilnadu, India and a Master degree in computer science and engineering from Pavendar Bharathidasan College of Engineering and Technology, Trichirappalli, Tamilnadu, India. He had completed his Ph.D in the field of Wireless Sensor Networks from SASTRA Deemed University. He has 5.5 years of teaching experience in engineering institutions and participated in several conferences and workshops. He published one research paper in international conference and participated in young IT professional competition conducted by CSI India. He is currently working as an Assistant Professor in the department of Computer Science & Engineering, Srinivasa Ramanujan Centre, SASTRA Deemed University, Kumbaonam, Tamilnadu, India. His research interests are Network Security, Wireless Sensor Networks, Cloud Computing, Internet of Things and Objected Oriented Design. Umamakeswari Arumugam received her Bachelor’s degree in Engineering from A.C.C.E.T., Karaikudi in 1989, Master’s Degree in 1994 from NIT (formerly REC), Trichy and Doctorate from SASTRA University in 2009. She has 25 years of work experience and her research interests are in the area of Computer Vision, Embedded Systems, Wireless Sensor Networks and Software Engineering. She has presented papers in Conferences and published papers in reputed Journals. She has done collaborative projects and also organized international conferences. She is currently working as Dean, School of Computing, SASTRA Deemed University, Thanjavur- 613401, Tamil Nadu, India.