Proceedings of the 3rd symposium on Usable privacy and security
Multi-touch authentication on tabletops
Proceedings of the SIGCHI Conference on Human Factors in Computing Systems
ColorPIN: securing PIN entry through indirect input
Proceedings of the SIGCHI Conference on Human Factors in Computing Systems
GesturePIN: using discrete gestures for associating mobile devices
Proceedings of the 12th international conference on Human computer interaction with mobile devices and services
Smudge attacks on smartphone touch screens
WOOT'10 Proceedings of the 4th USENIX conference on Offensive technologies
Progressive authentication: deciding when to authenticate on mobile phones
Security'12 Proceedings of the 21st USENIX conference on Security symposium
PassChords: secure multi-touch authentication for blind people
Proceedings of the 14th international ACM SIGACCESS conference on Computers and accessibility
MIBA: multitouch image-based authentication on smartphones
CHI '13 Extended Abstracts on Human Factors in Computing Systems
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In this paper, we report our trial to make a better form of personal identification number(PIN) authentication for a mobile device. We think that mobile users should be given a more secure alternative authentication because PIN authentication has well-known flaws. However, proposed alternative schemes change the authentication method drastically and that may discomfort mobile users. Our approach is to just change the input operation of PIN authentication by allowing more than one number at a time using a multi-touch enabled screen. We implemented a web-based prototype system and conducted an informal user study using it. The results of the study indicate that PIN input time, input errors and secret memorability of the proposed scheme were no worse than those of conventional PIN authentication. We also discuss the mathematical security level and other advantages of the scheme.