@ARTICLE{scannell2009proximity,
  author    = "Adin Scannell and Alexander Varshavsky and Anthony LaMarca and Eyal de Lara",
  title     = "Proximity-based Authentication of Mobile Devices",
  journal   = "International Journal of Security and Networks (IJSN)",
  volume    = "1",
  number    = "4",
  year      = "2009"
}