@Article{Security_Policies_and_Trust_in_Ubiquitous_Computing, author = "Anupam Joshi, Tim Finin, Lalana Kagal, Jim Parker, and Anand Patwardhan", title = "{Security Policies and Trust in Ubiquitous Computing}", month = "October", year = "2008", pages = "3769-3780", number = "1881", volume = "366", journal = "Philosophical Transactions of the Royal Society A", publisher = "Royal Society Publishing", }