Information Security Theory and Practice. Smart Devices, Pervasive Systems, and Ubiquitous Networks : Third IFIP WG 11.2 International Workshop, WISTP 2009 Brussels, Belgium, September 1-4, 2009 Proceedings Proceedings - Olivier Markowitch, Angelos Bilas, Jaap-Henk Hoepman, Chris J. Mitchell, Jean-Jacques Quisquater ((Lecture Notes in Computer Science))