Stuart E. Schechter, Robert W. Reeder. 1 + 1 = you: measuring the comprehensibility of metaphors for configuring backup authentication. In Lorrie Faith Cranor, editor, Proceedings of the 5th Symposium on Usable Privacy and Security, SOUPS 2009, Mountain View, California, USA, July 15-17, 2009. ACM International Conference Proceeding Series, ACM, 2009. [doi]
Abstract is missing.