@article{xiao2013proximity,
  title={Proximity-based security techniques for mobile users in wireless networks},
  author={Xiao, Liang and Yan, Qiben and Lou, Wenjing and Chen, Guiquan and Hou, Y Thomas},
  journal={IEEE Transactions on Information Forensics and Security},
  volume={8},
  number={12},
  pages={2089--2100},
  year={2013},
  publisher={IEEE}
}