@inproceedings{zheng2012sharp,
  title={Sharp: Private proximity test and secure handshake with cheat-proof location tags},
  author={Zheng, Yao and Li, Ming and Lou, Wenjing and Hou, Y Thomas},
  booktitle={European Symposium on Research in Computer Security},
  pages={361--378},
  year={2012},
  organization={Springer}
}