On cooperative jamming in wireless networks with eavesdroppers at arbitrary locations

This paper investigates cooperative jamming for secure connection in wireless networks. A cooperative jamming strategy is proposed to thwart eavesdroppers anywhere in the network, even if they are located close to the source or the destination. The basic idea is to defeat eavesdroppers by a divide and conquer strategy, and exploit the helpful interference from the source and the destination to circumvent the nearby eavesdropper problem. Analysis and simulation results reveal that this strategy can enhance the secure connection probability and can tolerate any number of independent eavesdroppers provided that the number of legitimate nodes satisfies certain condition.