@Article{Security_and_Privacy_Challenges_in_Open_and_Dynamic_Environments_,
  author = "Lalana  Kagal and Tim  Finin and Anupam  Joshi and Sol  Greenspan",
  title = "{Security and Privacy Challenges in Open and Dynamic Environments }",
  month = "June",
  year = "2006",
  organization = "IEEE",
  pages = "89-91",
  number = "6",
  volume = "39",
  journal = "Computer",
}