Wireless sensor network security
Résumé
Wireless sensor networks (WSNs) can be compared to ad hoc networks, but they are characterized by a large number of sensor devices called nodes with severe restrictions in terms of energy, processing and communication capabilities. Typically, sensors operate in remote hostile environments and with no possibility for recharging their batteries. The WSNs collect the monitoring data from the sensors and make decisions on the environment in which sensors are deployed. Data are usually collected bu a base station (BS) for subsequent analysis. A network being composed of hundreds or even thousands of sensor nodes can generate a large amount of data, so the challenge is to extend the lifetime of sensors by designing the least resource-consuming communication mechanisms. One of these designed mechanisms is the aggregation of data or message that serves to reduce the time transmission