Face ID Doesn’t Know Your Face
Face ID is an extremely convenient yet secure biometric authentication system. But the security features of Face ID actually go beyond simply protecting the data on your device from attackers. Put simply, Face ID doesn’t know your face.
Apple notes that Face ID doesn’t store an actual image of your likeness. Instead, it saves a mathematical value based on your features. While it works just as well for authentication, this means it’s impossible for a malicious party to recreate your face from this data.