The design and analysis of graphical passwords
SSYM'99 Proceedings of the 8th conference on USENIX Security Symposium - Volume 8
Smudge attacks on smartphone touch screens
WOOT'10 Proceedings of the 4th USENIX conference on Offensive technologies
Design and Implementation of Improved Authentication System for Android Smartphone Users
WAINA '12 Proceedings of the 2012 26th International Conference on Advanced Information Networking and Applications Workshops
MIBA: multitouch image-based authentication on smartphones
CHI '13 Extended Abstracts on Human Factors in Computing Systems
Exploring the design space of graphical passwords on smartphones
Proceedings of the Ninth Symposium on Usable Privacy and Security
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Draw-a-Secret password schemes, like the Google Android Pattern Lock, entail stroking out a shape on a touch screen. This paper explores techniques for expanding the richness of this input modality (multitouch input, off-target interaction) in order to increase password entropy and resistance to observation. A formative user study highlights user perceptions and usability issues relating to this design space and suggests directions for future development of this concept.