DEFENDING AGAINST ATTACKS IN DYNAMIC WIRELESS SENSOR NETWORKS USING ENHANCED KEY MANAGEMENT TECHNIQUE

Abstract

Wireless sensor networks (WSNs) are networks of micro sensors that have wireless communication capability and are mainly used for data gathering. Wireless sensor networks has a wide variety of applications that includes military sensing and tracking, patient status monitoring, traffic monitoring, building structures monitoring, monitoring forest, oceans, precision agriculture, etc where sensor devices often move between different locations. As WSNs are deployed in remote or hostile environments, sensor nodes are prone to various types of attacks. Data communication should be secure and for that suitable encryption key protocols
are being used from the past. The CL-EKM protocol makes the communication within the dynamic sensor networks secure. Usage of key management protocols decreases the network lifetime of overall system due to increased energy consumption. This paper proposes an optimum cluster formation technique with switching of header function after a fixed period of time as an extension to CL-EKM protocol. Analysis shows that the proposed system maintains the security
against various attacks at improved network lifetime and throughput.