Face ID explained
Apple’s face-reading tech includes a projector that beams out 30,000 invisible dots onto your mug, mapping it in 3D, which the camera can then read. This means a photo won’t work, and Apple even had film SFX experts copy people’s faces in 3D, but it wasn’t fooled by that, either. You set it up once with a thorough scan of your face, and it actually then learns about small changes to your look over time, so if you lose weight, it’s not confused. It can work around glasses and two- day-hangover stubble too, thanks to machine learning smarts and the A11 Bionic chip. And your face data is stored only on the phone, encrypted, and never sent to Apple.