ROMJIST Volume 24, No. 1, 2021, pp. 37-57
Leqiang BAI, Jizhe YU, Keyan CAO Sink Location Privacy Protection Algorithm Based on Virtual Circle in WSNs
ABSTRACT: For the protection of sink location privacy in WSNs, sink location privacy protection algorithm based on virtual circle is put forward. A virtual circle is constructed with the sink as the center, and mathematical models are established according to the location of the source node to determine the expected phantom source node, which provides direction for selecting the first stage phantom source node. Taking the first stage phantom source node as the starting point, a second stage one is randomly selected on the circle in a clockwise direction. The selection of the two phantom source nodes provides the diversity of packet transmission path. At the same time, the two phantom source nodes can inject fake packets. The first one transmits fake packets to some random destinations and some fake sinks set in the network, inducing an adversary to trace away from the sink. The second one transmits fake packets along the circle to some random destinations in the network, which further increases the difficulty for an adversary to capture the sink and achieves the purpose of protecting sink location privacy. The analysis of setting to deploy fake sinks shows that the location of the fake sinks satisfies randomicity and dispersity, by randomly selecting the angle on the external region of the virtual circle and using the normal distribution mathematical model to determine the distance between the fake sink and the sink. The simulation results show that the algorithm can effectively induce adversaries to deviate from the real path and improve the safe time.KEYWORDS: Wireless sensor networks (WSN), sink location privacy, virtual circle, phantom source node, fake sinkRead full text (pdf)