Di Lin, Paul Dunphy, Patrick Olivier, Jeff Yan. Graphical passwords & qualitative spatial relations. In Lorrie Faith Cranor, editor, Proceedings of the 3rd Symposium on Usable Privacy and Security, SOUPS 2007, Pittsburgh, Pennsylvania, USA, July 18-20, 2007. Volume 229 of ACM International Conference Proceeding Series, pages 161-162, ACM, 2007. [doi]
Abstract is missing.