TY - GEN
T1 - Authentication using graphical passwords
T2 - Symposium on Usable Privacy and Security, SOUPS 2005
AU - Wiedenbeck, Susan
AU - Waters, Jim
AU - Birget, Jean Camille
AU - Brodskiy, Alex
AU - Memon, Nasir
PY - 2005
Y1 - 2005
N2 - Graphical passwords are an alternative to alphanumeric passwords in which users click on images to authenticate themselves rather than type alphanumeric strings. We have developed one such system, called PassPoints, and evaluated it with human users. The results of the evaluation were promising with respect to rmemorability of the graphical password. In this study we expand our human factors testing by studying two issues: the effect of tolerance, or margin of error, in clicking on the password points and the effect of the image used in the password system. In our tolerance study, results show that accurate memory for the password is strongly reduced when using a small tolerance (10 × 10 pixels) around the user's password points. This may occur because users fail to encode the password points in memory in the precise manner that is necessary to remember the password over a lapse of time. In our image study we compared user performance on four everyday images. The results indicate that there were few significant differences in performance of the images. This preliminary result suggests that many images may support memorability in graphical password systems.
AB - Graphical passwords are an alternative to alphanumeric passwords in which users click on images to authenticate themselves rather than type alphanumeric strings. We have developed one such system, called PassPoints, and evaluated it with human users. The results of the evaluation were promising with respect to rmemorability of the graphical password. In this study we expand our human factors testing by studying two issues: the effect of tolerance, or margin of error, in clicking on the password points and the effect of the image used in the password system. In our tolerance study, results show that accurate memory for the password is strongly reduced when using a small tolerance (10 × 10 pixels) around the user's password points. This may occur because users fail to encode the password points in memory in the precise manner that is necessary to remember the password over a lapse of time. In our image study we compared user performance on four everyday images. The results indicate that there were few significant differences in performance of the images. This preliminary result suggests that many images may support memorability in graphical password systems.
KW - Authentication
KW - Graphical passwords
KW - Password images
KW - Tolerance
UR - http://www.scopus.com/inward/record.url?scp=60649116908&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=60649116908&partnerID=8YFLogxK
U2 - 10.1145/1073001.1073002
DO - 10.1145/1073001.1073002
M3 - Conference contribution
AN - SCOPUS:60649116908
SN - 1595931783
SN - 9781595931788
T3 - ACM International Conference Proceeding Series
SP - 1
EP - 12
BT - SOUPS 2005 - Proceedings of the Symposium on Usable Privacy and Security
Y2 - 6 July 2005 through 8 July 2005
ER -