A security assessment of tiles: a new portfolio-based graphical authentication system

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

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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
Title of host publicationCHI EA '12
Subtitle of host publicationCHI '12 Extended Abstracts on Human Factors in Computing Systems
Place of PublicationNew York
PublisherAssociation for Computing Machinery (ACM)
Pages1967-1972
Number of pages6
ISBN (Print)9781450310161
DOIs
Publication statusPublished - 5 May 2012
Event30th ACM Conference on Human Factors in Computing Systems: It's the experience! - Austin, United States
Duration: 5 May 201210 May 2012
Conference number: 30th
https://chi2012.acm.org/index.shtml

Conference

Conference30th ACM Conference on Human Factors in Computing Systems
Abbreviated titleCHI 2012
Country/TerritoryUnited States
CityAustin
Period5/05/1210/05/12
Internet address

Keywords

  • Shoulder surfing
  • Graphical passwords
  • Authentication
  • Usable security
  • Graphical authentication systems

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