Hierarchical Key Agreement Protocol for Wireless Sensor Networks
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Wireless sensor network promises ubiquitous data ...
Wireless sensor network promises ubiquitous data
collection and processing for variety of commercial, healthcare
and military applications. Practical realization of WSN
applications is possible only after assuring network security.
Cryptographic key distribution is an important phase in
network security which establishes initial trust in the network.
Security protocol implementation in WSN is limited by
resource constrained nature of sensor nodes. The key
distribution algorithm satisfying security requirements of
given WSN application should be implemented with minimum
communication and memory overhead. As a solution to this
problem, hierarchical key management technique is proposed
in this paper. Symmetric key pre-distribution technique with
less computational overhead and ID-based asymmetric key
(IBK) distribution technique with less communication
overhead are applied simultaneously in the network at
different levels. Resilience strength and resource overhead of
the proposed scheme is compared with both symmetric and
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