Apple clarifies in its privacy page doubts about the operation of Face ID, security or what happens when it does not recognize your face.
Although Craig Federighi has already settled some doubts about Face ID, the privacy and operation of the new face recognition system of the iPhone X, Apple has updated its privacy page including a lot of additional details about the operation of this system security and, above all, clearing many doubts related to the effectiveness of its operation.
Although we already knew many details, we now know that Face ID captures exact face data by projecting and analyzing more than 30,000 invisible light points, all to create a depth map combined with an infrared image of the face. In this way, and in conjunction with the neural motor of the A11 Bionic chip, protected within the Secure Enclave (the data does not leave the phone), it transforms the depth map and the infrared image into a mathematical representation and compares that representation with the data registered facials.
The interesting thing is that thanks to this system, Face ID automatically adapts to changes in appearance, such as the use of intensive cosmetic makeup or facial hair growth. And how do you avoid false negatives when these changes occur? if there is a significant change in the appearance of the iPhone owner, such as shaving a full beard, Face ID recognizes the face but will confirm the identity of the user using the access code before updating facial recognition data, which will do in second flat.
In addition, Apple has already confirmed that Face ID is designed to work with hats, scarves, glasses, contact lenses and sunglasses, and in all environments and situations: outdoors, cloudy or total darkness. On operating angles, Apple claims that the TrueDepth camera that uses Face ID has a range of vision similar to taking a photo or making a FaceTime call with the front camera, and that the system works best when the device is 25- 50 cm away from the face.
On the code, the system will always ask for the terminal key when certain particular situations arise: the device has just been turned on or reset, has not been unlocked for more than 48 hours, the password has not been used to unlock the device in recent six-and-a-half days and Face ID has not unlocked the device in the last 4 hours when the device has received a remote lock command after five unsuccessful attempts to reconfigure a face or when the emergency SOS system is activated.