@INPROCEEDINGS{varshavsky2007amigo,
  author    = "Alex Varshavsky and Adin Scannell and Anthony LaMarca and Eyal de Lara",
  title     = "Amigo: Proximity-based Authentication of Mobile Devices",
  booktitle = "Proceedings of the Ninth International Conference on Ubiquitous Computing (UbiComp 2007)",
  month     = "September",
  year      = {2007}
}