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Low Rate Wireless Personal Area Networks (LR-PAN) such as sensor networks have become very popular in recent years. These networks can be implemented with little or no infrastructure. The first step of standardization for such LR networks was taken in 2003 when the IEEE 802.15.4 was approved. This standard however went through an enhancement process and a newer version was released in 2006 known as...
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,...
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