Symposium On Usable Privacy and Security (SOUPS) 2007, July 18-20, 2007, Pittsburgh, PA, USA.
Lujo Bauer, Lorrie Faith Cranor, Michael K. Reiter, Kami Vaniea
Carnegie Mellon University
Pittsburgh, PA 15213
http://www.pdl.cmu.edu/
Grey is a smartphone-based system by which a user can exercise
her authority to gain access to rooms in our university building,
and by which she can delegate that authority to other users.We present
findings from a trial of Grey, with emphasis on how common
usability principles manifest themselves in a smartphone-based security
application. In particular, we demonstrate aspects of the system
that gave rise to failures, misunderstandings, misperceptions,
and unintended uses; network effects and new flexibility enabled by
Grey; and the implications of these for user behavior.We argue that
the manner in which usability principles emerged in the context of
Grey can inform the design of other such applications.
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