Secure Clustering and Symmetric Key Establishment in Heterogeneous Wireless Sensor Networks

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Information security in infrastructureless Wireless Sensor Networks (WSNs) is one of the most important research challenges. In these networks, sensor nodes are typically sprinkled liberally in the field in order to monitor, gather, disseminate, and provide the sensed data to the command node. Various studies have focused on key establishment schemes in homogeneous WSNs. However, recent research has shown that achieving survivability in WSNs requires a hierarchy and heterogeneous infrastructure. In this paper, to address security issues in the heterogeneous WSNs, the authors propose a secure clustering scheme along with a deterministic pairwise key management scheme based on public key cryptography.