ClickLeak: Keystroke Leaks Through Multimodal Sensors in Cyber-Physical Social Networks Li, Fan ; Wang, Xiuxiu ; Chen, Huijie ; Sharif, Kashif ; Wang, Yu Abstract Publication: IEEE Access Pub Date: 2017 DOI: 10.1109/ACCESS.2017.2776527 Bibcode: 2017IEEEA...527311L