H4Plock: Supporting Mobile User Authentication through Gestural Input and Tactile Output


We have developed a novel authentication mechanism, H4Plock (pronounced “Hap-lock”), that leverages gestural input and tactile feedback to defend against casual observation attacks. Users enter up to four on-screen gestures based on receiving tactile prompts, in the form of vibrations, from the mobile device. These prompts inform the user as to which… (More)


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