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

James Nicholson, Paul Dunphy, Lynne Coventry, Pamela Briggs, Patrick Olivier

Research output: Contribution to conferencePaperpeer-review

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.
Original languageEnglish
Publication statusPublished - May 2012
Event30th ACM Conference on Human Factors in Computing Systems, CHI 2012 - Austin, Texas, Austin, TX, United States
Duration: 5 May 201210 May 2012
http://chi2012.acm.org/program/desktop/Session232.html?searchterm=health+system

Conference

Conference30th ACM Conference on Human Factors in Computing Systems, CHI 2012
CountryUnited States
CityAustin, TX
Period5/05/1210/05/12
Internet address

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