One of the new features in Windows 10 is the ability to sign in via Windows Hello, a facial recognition system that relies on Intel's RealSense 3D camera technology. There are some concerns about about the safety of this system but apparently it's pretty secure. The Australian did a test with twins and discovered the system worked pretty well, in most cases the technology had no problem with distinguishing identical twins. There was one case where the system failed, but no case of it wrongly granting access.
The face recognition process involves a RealSense camera made by Intel, which sits embedded above the display. Three cameras — featuring an infra-red lens, a regular lens and a 3-D lens — use photographic analysis, heat detection and depth detection to decide who is at your computer display.
Microsoft claims a false acceptance rate of lower than one in 100,000. It says the incident whereby a Russian hacker last year posted 1.2 billion passwords on the net shows passwords are a lost cause as a security measure.