https://www.theregister.co.uk/2017/11/17/apple_iphone_x_face_id/

Face ID has been a bit of a thorn in Apple’s side for its iPhone X, no thanks to claims the AI-powered login mechanism can be tricked by cheapish masks or relatives of handset owners.

Now, this week, Apple has published a blog post describing in a fair amount of detail how its algorithms behind the Face ID authentication system work. The approach is based on OverFeat, a model developed by researchers at New York University, that teaches a deep convolutional neural network (DCN) to classify, locate and detect objects in images.