Title: Protecting Receiver-Location Privacy in Wireless Sensor
Networks

Speaker: Ying Jian

Room: NEB 101

Time: 4:05pm - 5:05pm


Bio:

Ying Jian received the B.S. and M.S. degrees in computer science and
technology from the Tsinghua University, Beijing, China. He is currently
a Ph.D. candidate at the Department of Computer and Information Science
and Engineering, the University of Florida. His research interests
include wireless and mobile networking and computing, security, and
quality of service support in wireless networks.


Abstract:

Due to the open nature of a sensor network, it is relatively
easy for an adversary to eavesdrop and trace packets transmitted in the
network to capture the receiver physically. After studying the behavior
patterns of the adversary, the paper presents countermeasures to this
problem. We propose the location privacy routing protocol (LPR) that is
easy to implement and can provide path diversity. Combining with fake
packet injection, LPR is able to minimize the traffic direction
information that an adversary can retrieve from eavesdropping. By making
the directions of both incoming and outgoing traffic at a sensor node
uniformly distributed, the new defense system makes it very hard for an
adversary to perform analysis on locally gathered information and infer
the direction to which the receiver locates. We evaluate our defense
system based on three criteria: delivery time, privacy protection
strength, and energy cost. The simulation results show that LPR is
capable of providing strong protection for the receiver's location
privacy. Under similar energy cost, the safe time of the receiver
provided by LPR is much longer than other methods, including Phantom
routing and DEFT. The performance of our system can be tuned through a
couple of parameters that determine the tradeoff between energy cost and
the strength of location-privacy protection.