Description  Claims  Drawing  Cited references 

US20090046929A   [0004] 
US5559961A   [0005] 
US2004010721A   [0005] 

Graphical Passwords: A Survey   [0006] 
Authentication Using Graphical Passwords: Basic Results   [0007] 
Authentication Using Graphical Passwords: Effects of Tolerance and Image Choice   [0007] 
PassPoints: Design and Longitudinal Evaluation of a Graphical Password System   [0007]