English

Key Management Schemes for Secure Communication in Heterogeneous Sensor Networks

Hierarchical Sensor Network organization is widely used to achieve energy efficiency in Wireless Sensor Networks(WSN). To achieve security in hierarchical WSN, it is important to be able to encrypt the messages sent between sensor nodes and its cluster head. The key management task is challenging due to resource constrained nature of WSN. In this paper we are proposing two key management schemes for hierarchical networks which handles various events like node addition, node compromise and key refresh at regular intervals. The Tree-Based Scheme ensures in-network processing by maintaining some additional intermediate keys. Whereas the CRT-Based Scheme performs the key management with minimum communication and storage at each node.

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