Authentication using graphical passwords: effects of tolerance and image choice. - Susan Wiedenbeck; Jim Waters; Jean-Camille Birget; Alex Brodskiy; Nasir D. Memon (SOUPS, 2005)

PassPoints: Design and longitudinal evaluation of a graphical password system. - Susan Wiedenbeck; Jim Waters; Jean-Camille Birget; Alex Brodskiy; Nasir D. Memon (Int. J. Hum. Comput. Stud., 2005)