@inproceedings{ARSPA,
  title = "Efficient group authentication protocol based on human interaction",
  author = "Long H. Nguyen and Andrew W. Roscoe",
  year = "2006",
  booktitle = "{Proceedings of FCS-ARSPA 2006 (Foundations of Computer Security and Automated Reasoning for Security Protocol Analysis)}",
  url = "http://www.easychair.org/FLoC-06/FCS-ARSPA-day226.html",
}