experimental protocol / secure systems / authentication systems / short online tasks / graphical recall-based systems / large online user study / computational device / online study / challenge-response systems / Recall-based systems / online survey / /
OperatingSystem
Android / /
Organization
University of New Mexico / Carnegie Mellon University / /
Person
Michelle L. Mazurek / Nicolas Christin / Tim Vidas / Patrick Gage Kelley / / /