Costas Lambrinoudakis Günther Pernul A. Min Tjoa Trust, Privacy and Security in Digital Business, 4th International Conference, TrustBus 2007, Regensburg, Germany, September 3-7, 2007, Proceedings TrustBus Lecture Notes in Computer Science 4657 Springer 2007 978-3-540-74408-5 db/conf/trustbus/trustbus2007.html