Author
Ian Jrmyn, Alain Mayer, Fabian Monrose, Michael K. Reiter, Aviel D. Rubin
Abstract
In this paper we propose and evaluate new graphical password schemes that exdploit features of graphical input displays to achieve better security than textbased passwords. Graphical in put devices enable the user to decouple the position of inputs from the temporal order in which those inputs occur, and we show that this decoupling can be used to generate password schemes with substantially larger password spaces. In order to evaluate the security of one of our schemes, we devise a novel way to capture a subset of the "memorable" passwords that , we believe, is itself a contribution. In this work we are primarily motivated be devices such as personal digital assistants (PDAs) that offer graphical input capabilities wia a stylus, and we describel our prototype inplementation of one of our password schemes on such a PDA, namely the Palm Pilot.
