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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
computer science
Is a picture really worth a thousand words? Exploring the feasibility of graphical authentication systems
International Journal of Human Computer Studies, Volume 63, No. 1-2, Year 2005
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Description
The weakness of knowledge-based authentication systems, such as passwords and Personal Identification Numbers (PINs), is well known, and reflects an uneasy compromise between security and human memory constraints. Research has been undertaken for some years now into the feasibility of graphical authentication mechanisms in the hope that these will provide a more secure and memorable alternative. The graphical approach substitutes the exact recall of alphanumeric codes with the recognition of previously learnt pictures, a skill at which humans are remarkably proficient. So far, little attention has been devoted to usability, and initial research has failed to conclusively establish significant memory improvement. This paper reports two user studies comparing several implementations of the graphical approach with PINs. Results demonstrate that pictures can be a solution to some problems relating to traditional knowledge-based authentication but that they are not a simple panacea, since a poor design can eliminate the picture superiority effect in memory. The paper concludes by discussing the potential of the graphical approach and providing guidelines for developers contemplating using these mechanisms. © 2005 Elsevier Ltd. All rights reserved.
Authors & Co-Authors
Johnson, Graham I.
United States, West Columbia
Ncr Corporation
Renaud, Karen V.
United Kingdom, Glasgow
University of Glasgow
Statistics
Citations: 209
Authors: 2
Affiliations: 3
Identifiers
Doi:
10.1016/j.ijhcs.2005.04.020
ISSN:
10715819