@TechReport{Vigil_Providing_Trust_for_Enhanced_Security_in_Pervasive_Systems, author = "Lalana Kagal, Filip Perich, Anupam Joshi, Yelena Yesha, and Tim Finin", title = "{Vigil: Providing Trust for Enhanced Security in Pervasive Systems}", month = "August", year = "2002", institution = "University of Maryland, Baltimore County", }