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 / SpringerLink (Online service), 2007 r=on-line. - Текст : электронный.