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Providing security to aggregate data in wireless sensor networks is known as secure data aggregation in WSN. [60] [62] [63] were the first few works discussing techniques for secure data aggregation in wireless sensor networks. Two main security challenges in secure data aggregation are confidentiality and integrity of data.
The controller performs tasks, processes data and controls the functionality of other components in the sensor node. While the most common controller is a microcontroller, other alternatives that can be used as a controller are: a general purpose desktop microprocessor, digital signal processors, FPGAs and ASICs.
Wireless Sensor Networks (WSN / WSAN) are, generically, networks of low-power, low-cost devices that interconnect wirelessly to collect, exchange, and sometimes act-on data collected from their physical environments - "sensor networks". Nodes typically connect in a star or mesh topology.
The major environmental factors are the shared medium and varying topology. The shared medium dictates that channel access must be regulated in some way. This is often done using a medium access control (MAC) scheme, such as carrier-sense multiple access (CSMA), frequency-division multiple access (FDMA) or code-division multiple access (CDMA).
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Wireless icon. A wireless network is a computer network that uses wireless data connections between network nodes. [1] Wireless networking allows homes, telecommunications networks, and business installations to avoid the costly process of introducing cables into a building, or as a connection between various equipment locations. [2]
Apart from these, two other critical issues in WSN design are computational cost and hardware cost. Computational cost is the amount of computation done during these phases. Hardware cost is generally the cost of the memory and battery in each node. Keys may be generated randomly and then the nodes determine mutual connectivity. [3]
A Stanford Research Institute's Packet Radio Van, site of the first three-way internetworked transmission. Initial, large-scale trials of the Near-term digital radio, February 1998. The earliest wireless data network was called PRNET, the packet radio network, and was sponsored by Defense Advanced Research Projects Agency (DARPA) in the early ...