Using Wi-Fi to Detect Hand Motions and Steal Passwords

This is impressive research: "When CSI Meets Public WiFi: Inferring Your Mobile Phone Password via WiFi Signals": Abstract: In this study, we present WindTalker, a novel and practical keystroke inference framework that allows an attacker to infer the sensitive keystrokes on a mobile device through WiFi-based side-channel information. WindTalker is motivated from the observation that keystrokes on mobile devices will...