@conference{lee02key,
  title = "Distributed Collaborative Key Agreement Protocols for Dynamic Peer Groups",
  author = "Patrick P.C. Lee, John Chi Shing Lui, David K.Y. Yau",
  year = "2002",
  month = "nov",
  booktitle = " Proceedings of 10th IEEE International Conference on Network Protocols (ICNP)",
  address = "Paris, France",
}