Information Security Theory and Practices. Smart Cards, Mobile and Ubiquitous Computing Systems First IFIP TC6 / WG 8.8 / WG 11.2 International Workshop, WISTP 2007, Heraklion, Crete, Greece, May 9-11, 2007. Proceedings - Sauveron, Damien; Markantonakis, Konstantinos; Bilas, Angelos; Quisquater, Jean-Jacques (Springer Berlin Heidelberg : Imprint: Springer, 2007)