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CHI
2011
ACM
12 years 9 months ago
Security through a different kind of obscurity: evaluating distortion in graphical authentication schemes
While a large body of research on image-based authentication has focused on memorability, comparatively less attention has been paid to the new security challenges these schemes m...
Eiji Hayashi, Jason Hong, Nicolas Christin
SOUPS
2009
ACM
13 years 12 months ago
Educated guess on graphical authentication schemes: vulnerabilities and countermeasures
This paper investigate security of graphical authentication tokens against educated guess attacks. Results of two user studies indicate that, if we use original photos as authenti...
Eiji Hayashi, Jason Hong, Nicolas Christin