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In this position paper, the authors address some current limitations and challenges as well as emerging directions in three related areas of secure communication: security in Wireless Sensor Networks - WSNs, security in Mobile Ad hoc NETworks - MANETs, and security in Cellular Phone Networks. Sensors that obtain information by sensing the environment might not be able to propagate in real time. One basic reason is that, a batch of deployed sensors could form not a network per se, but, a collection of devices each responsible for its own sensed data.
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