Isolated Adversary Zone for source location privacy in Wireless Sensor Networks

Privacy, especially source location privacy in many Wireless Sensor Networks (WSNs) applications plays an important role in the effectiveness of these applications. Exposure of source location information in these applications may put the monitored entities or subjects in danger. Many solutions are available based on various techniques, including random walk. Most existing random walk based source location privacy preservation proposals may not work well in critical applications, because of their insufficient safety period, high energy consumption, and data delivery delay. This article proposes a novel solution for source location privacy in WSNs based on a random walk routing, especially for patient attackers to improve safety period and energy efficiency. The proposed strategy forms an Isolated Adversary Zone (IAZ) by sacrificing a certain percentage of sensor nodes and entraps patient attackers in that zone. This approach will increase safety period and energy efficiency in compared to the existing approaches as an entrapped patient attacker will wait for long time to make an attack.