Researchers from universities in China and the UK have published a novel method that breaks Android’s pattern lock system based on videos of people entering their patterns from a distance of up to nine meters away. They say the more complex the pattern was, the easier it was to crack, with most complex patterns falling after the first attempt. Researchers say they cracked 95% of patterns from 120 test subjects, in a maximum of five attempts, the number after which some Android devices will lock down the phone and its data for good.
Source: https://www.bleepingcomputer.com/news/security/android-pattern-locks-can-be-cracked-using-video-recordings/