A Security Assessment of Tiles: A New Portfolio-Based Graphical Authentication System

Nicholson, James, Dunphy, Paul, Coventry, Lynne, Briggs, Pamela and Olivier, Patrick (2012) A Security Assessment of Tiles: A New Portfolio-Based Graphical Authentication System. In: CHI 2012 (ACM SIGCHI Conference on Human Factors in Computing Systems), 5-10 May 2012, Austin, Texas.

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Abstract

In this paper we propose Tiles, a graphical authentication system in which users are assigned a target image and subsequently asked to select segments of that image. We assess the extent to which this system provides protection against two security threats: observation attacks and sharing of authentication credentials in two laboratory-based studies. We note some of the vulnerabilities of the new system but provide evidence that automated manipulation of the similarity of the decoy images can help mitigate the threat from verbal sharing and observation attacks.

Item Type: Conference or Workshop Item (Paper)
Subjects: C800 Psychology
W200 Design studies
Department: Faculties > Arts, Design and Social Sciences > School of Design > Northumbria Design
Faculties > Health and Life Sciences > School of Life Sciences > Psychology
Depositing User: Ellen Cole
Date Deposited: 15 Apr 2013 14:22
Last Modified: 10 Aug 2015 11:05
URI: http://nrl.northumbria.ac.uk/id/eprint/12175

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