Key distribution is an important issue in wireless sensor network (WSN) design. It is a newly developing field due to the recent improvements in wireless communications.
Wireless sensor networks are networks of small, battery-powered, memory-constraint devices named sensor nodes, which have the capability of wireless communication over a restricted area [1]. Due to memory and power constraints, they need to be well arranged to build a fully functional network.
source:http://en.wikipedia.org/wiki/Key_distribution_in_wireless_sensor_networks
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