Scientists from Newcastle University in the UK have demonstrated an attack that can record data from around 25 sensors in a smartphone. Attackers can guess PINs and passwords with a surprising degree of accuracy by monitoring your phone’s sensors. Researchers were able to guess four-digit PINs on the first try with 74% accuracy and on the fifth try with 100% accuracy based on the data logged from just motion and orientation sensors. The team has alerted leading browser providers such as Google and Apple of the risks, while some, including Mozilla and Safari, have partially fixed.
Source: https://thehackernews.com/2017/04/phone-sensor-password-hacking.html