Md. Sakhawat Hossen

Mohammad Saiful Islam Mamun, A. F. M Sultanul Kabir, Md. Sakhawat Hossen et al.

In recent years, wireless sensor network becomes popular both in civil and military jobs. However, security is one of the significant challenges for sensor network because of their deployment in open and unprotected environment. As cryptographic mechanism is not enough to protect sensor network from external attacks, intrusion detection system (IDS) needs to be introduced. In this paper we propose a policy based IDS for hierarchical architecture that fits the current demands and restrictions of wireless ad hoc sensor network. In this proposed IDS architecture we followed clustering mechanism to build four level hierarchical network which enhance network scalability to large geographical area and use both anomaly and misuse detection techniques for intrusion detection that concentrates on power saving of sensor nodes by distributing the responsibility of intrusion detection among different layers. We also introduce a policy based intrusion response system for hierarchical architecture.

Sumanta Saha, Md. Safiqul Islam, Md. Sakhawat Hossen et al.

Wireless Sensor Network (WSN) consists of low cost sensor nodes which cannot afford to implement sophisticated security system in it. That is why intrusion detection architecture for WSN is considerably different and difficult to implement. Most of the current implementations are based on exchanging anomaly signals among the leaf level sensors resulting in too much power consumption. We propose a novel architecture for Intrusion Detection System (IDS) in WSN based on Hierarchical Overlay Design (HOD) that will distribute the overall responsibility of intrusion detection into entities and thus conserve memory and power of the nodes. The architecture uses layered design with GSM cell like structure based on special monitor nodes. The HOD structure enables the sensors to communicate using far less messages and thus conserve precious power and also saves memory by not implementing IDS module on each sensor. The proposal also uses rippling of alarm through layers and thus ensures proper delivery to the uppermost layer with redundancy.