Quote:The final "matching" part of the procedure relies on one neural network that Apple says was trained using more than a billion 2D infrared and dot-based images.

Quote:Simultaneously, it explains "an additional neural network that's trained to spot and resist spoofing" comes into play.

Quote:it does not claim it is perfect, and intends to continue lab-based trials to further train the neural network and offer updates to users over time.

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• Face ID data cannot be saved off the device by the user, but some diagnostic data can be shared with Apple if express permission is given
  
• the system will automatically augment its stored mathematical representations of the owner's face over time to take account of ageing