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Multi-touch authentication on tabletops

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Title of host publicationProceedings of the ACM Conference on Human Factors in Computing Systems
DatePublished - 2010
Pages1093-1102
PublisherAssociation for Computing Machinery (ACM)
Original languageEnglish
ISBN (Print)978-1-60558-929-9

Abstract

The introduction of tabletop interfaces has given rise to the need for the development of secure and usable authentication techniques that are appropriate for the co-located collaborative settings for which they have been designed. Most commonly, user authentication is based on something you know, but this is a particular problem for tabletop interfaces, as they are particularly vulnerable to shoulder surfing given their remit to foster co-located collaboration. In other words, tabletop users would typically authenticate in full view of a number of observers. In this paper, we introduce and evaluate a number of novel tabletop authentication schemes that exploit the features of multi-touch interaction in order to inhibit shoulder surfing. In our pilot work with users, and in our formal user-evaluation, one authentication scheme - Pressure-Grid - stood out, significantly enhancing shoulder surfing resistance when participants used it to enter both PINs and graphical passwords.

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