Keywords: Energy Efficient, Clusters, Key Management, Security and WSN.
Advance development in wireless sensor network (WSN) has offered tremendous applications in various fields. WSN consists of tiny sensors with unique features, capable of processing the sensed data and are resource constrained. WSN provides robust connection between objects to share information via wireless medium. Despite the significance, WSN face several issues such as more energy consumption, bandwidth constrain and security. Due to open environment and wireless medium secure data transmission within WSN is a critical issue, thus to cope with WSN applications a robust security development is required. Cluster based hierarchical network guarantees energy efficient over flat network. However existing security scheme employs high computational cryptographic functions which consumes more energy and has higher computational overhead. In this work we propose energy efficient hybrid secure key management scheme (EEHSKM) for secure communication from cluster head to base station. This scheme aims to optimize public key cryptographic steps and utilizes symmetric key cryptographic operations which extensively reduce energy consumption and ensures secure communication. The simulation results are evaluated to achieve QoS metrics.