VISIBLE: Video-Assisted Keystroke Inference from Tablet Backside Motion

The deep penetration of tablets in daily life has made them attractive targets for keystroke inference attacks that aim to infer a tablet user's typed inputs.This paper presents VISIBLE, a novel video-assisted keystroke inference framework to infer a tablet user's typed inputs from surreptitious video recordings of tablet backside motion.VISIBLE is built upon the observation that the keystrokes on different positions of the tablet's soft...