Key management issues in wireless sensor networks: current proposals and future developments

TitleKey management issues in wireless sensor networks: current proposals and future developments
Publication TypeJournal Article
Year of Publication2007
AuthorsLee, J. C., V. C. M. Leung, K. H. Wong, J. Cao, and H. C. B. Chan
JournalWireless Communications, IEEE
Pagination76 -84
Date Publishedoct.
Keywordscryptographic protocols, Du protocol, Eschenauer protocol, extremely security-critical applications, future developments, hierarchical scalability feature, IEEE 802.15.4b standard, key management protocols, LEAP protocol, operational requirements, Panja protocol, random key distribution, security requirementd, sensor node resources constraint, SHELL protocol, technological forecasting, telecommunication network planning, telecommunication security, wireless sensor networks, ZigBee enhanced standard

Key management has remained a challenging issue in wireless sensor networks (WSNs) due to the constraints of sensor node resources. Various key management schemes that trade off security and operational requirements have been proposed in recent years. In this article, we first examine the security and operational requirements of WSNs and then review five key management protocols: Eschenauer, Du, LEAP, SHELL, and Panja. Eschenauer's scheme is a classical random key distribution scheme for WSNs. Du's scheme improves on Eschenauer's scheme by using key matrices. LEAP provides a highly flexible key management scheme using four types of keys. SHELL focuses on achieving high robustness, and Panja is optimized for hierarchical WSNs. LEAP, SHELL, and Panja support cluster-based operations and are more aligned with current trends as shown by the new standards, IEEE 802.15.4b and the ZigBee "enhanced" standard. Future developments likely will incorporate the features of LEAP and adjustable robustness enhancements from Eschenauer or Du; extremely security-critical applications may benefit from restructuring SHELL to ease implementation and maintenance. Developments for extremely large WSNs should consider improving Panja's scheme due to its hierarchical scalability feature.


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