Information Security Theory and Practices. Security and Privacy of Pervasive Systems and Smart Devices [electronic resource] : 4th IFIP WG 11.2 International Workshop, WISTP 2010, Passau, Germany, April 12-14, 2010. Proceedings / edited by Pierangela Samarati, Michael Tunstall, Joachim Posegga, Konstantinos Markantonakis, Damien Sauveron.