Research On The Source-location Privacy In Wireless Sensor Networks Against A Global Eavesdropper

:With the continuous development of wireless sensor network technology, the application of wireless sensor networks is becoming more and more widespread, the location privacy protection in the wireless sensor networks has become increasingly important.Wireless sensor network is consisted by a set of inexpensive miniature sensor nodes, which can monitor an object by means of wireless communication. The position information of Sensor network is a combination of spatial information and physical entities, if the location information of the source node is exposed, it means exposing the position of the target object. therefore, the location privacy about the source nodes in wireless sensor networks appears to be particularly important.In this paper, we propose two effective protection strategies on the source node aiming at the global eavesdropper.One is the Fake Area privacy protection strategy about source node. This strategy make the attacked area expanded by creating a few of fake areas,and all areas can keep synchronization through the control of sink,which can overcome the differences among the area,and the differences is caused by the movement of source node. The other is the Backbone Routine Tree protection strategy. This strategy adequately takes advantage of the low energy consumption of the non-hot area, so as to mobilize the nodes of whole network to transmit fake packet, which greatly confuses the global attackers, then, it decreases the amount of packets sending to the sink, and decreases the energy consumption of the hot area, through clustering and setting up backbone routine tree in the whole network, consequently, it could prolong the life time of the network, meanwhile, accelerate the convergence rate of the network to collect date, reduce the time delay to accelerate the speed of the network to collect data.