@inproceedings{Simpson_et_al_2006,
  title = "On tracker attacks in health grids",
  author = "A. C. Simpson and D. J. Power and M. A. Slaymaker",
  year = "2006",
  booktitle = "Proceedings of the Annual ACM Symposium on Applied Computing (SAC '06)",
  publisher = "ACM Press",
}