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Title: Key management issues in wireless sensor networks : current proposals and future developments
Authors: Lee, JC
Leung, VCM
Wong, KH
Cao, J 
Chan, H 
Issue Date: Oct-2007
Source: IEEE wireless communications, Oct. 2007, v. 14, no. 5, p. 76-84
Abstract: 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 like-ly 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.
Keywords: Cryptographic protocols
Technological forecasting
Telecommunication network planning
Telecommunication security
Wireless sensor networks
Publisher: IEEE
Journal: IEEE wireless communications 
ISSN: 1536-1284
DOI: 10.1109/MWC.2007.4396946
Rights: © 2007 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.
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