This paper reports on an on-going project, which is investigating the role that location plays in the visibility of information presented on a public display. Spatial measures are presented, derived from the architectural theory of Space Syntax. These are shown to relate to the memorability of words and images presented on different displays. Results show a complex pattern of interactions betwe...

Users have conflicting sets of requirements when it comes to choosing Personal Identification Numbers (PINs) for mobile phones or other systems that use PINs for authentication: the conflict lies between the ‘easy to remember’ usability requirement and the ‘hard to guess’ security requirement. Users often ignore the security requirement and choose PINs that are easy to remember and reuse, makin...

Received: 8 April 2008 Revised: 18 August 2008 2nd Revision: 31 January 2009 Accepted: 23 February 2009 Abstract As one of the most common authentication methods, passwords help secure information by granting access only to authorized parties. To be effective, passwords should be strong, secret, and memorable. While password strength can be enforced by automated information technology policies,...

Inspired by people’s strong memory for visual-spatial paths (e.g., commuting paths), we present in this paper an introductory exploration of the use of these paths for memorable, strong mobile authentication. In a preliminary study, we evaluated several lowfidelity representations for encoding relatively strong (~20 bit) secrets as visual-spatial paths: a 2D birds-eye view, a 3D thirdperson vie...