Elisa Bertino James B. D. Joshi Collaborative Computing: Networking, Applications and Worksharing, 4th International Conference, CollaborateCom 2008, Orlando, FL, USA, November 13-16, 2008, Revised Selected Papers 10 http://dx.doi.org/10.1007/978-3-642-03354-4 2009 978-3-642-03353-7 Lecture Notes of the Institute for Computer Sciences, Social Informatics and Telecommunications Engineering Springer CollaborateCom db/conf/colcom/colcom2008.html