Computer Security - ESORICS 2004 9th European Symposium on Research Computer Security, Sophia Antipolis, France, September 13-15, 2004. Proceedings - Samarati, Pierangela; Samarati, Pierangela; Ryan, Peter; Ryan, Peter; Gollmann, Dieter; Gollmann, Dieter; Molva, Refik; Molva, Refik (Springer Berlin Heidelberg : Imprint: Springer, 2004)