Susan Wiedenbeck, Jim Waters, Leonardo Sobrado, Jean-Camille Birget. Design and evaluation of a shoulder-surfing resistant graphical password scheme. In Augusto Celentano, editor, Proceedings of the working conference on Advanced visual interfaces, AVI 2006, Venezia, Italy, May 23-26, 2006. pages 177-184, ACM Press, 2006. [doi]
Abstract is missing.