Abstract
In recent years, wireless sensor networks (WSN) are widely applied to three-dimensional monitoring, distributed monitoring, target tracking, space exploration, a random distribution of measurement and other fields. Wireless sensor networks, such as enemy reconnaissance, strength monitoring and other special purpose on the military forces research on transmission of information security has been widely concerned. In this paper, a new technology, i.e. time reversal (TR) techniques, is utilized to reduce probability that the signal have been illegally detected in space and time. Time reversal technique allows the signal can be detected only at a specific time and specific space, while in the other time and space the signal will be very difficult to be detected; thereby TR technology will enhance the information security of wireless sensor network.
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