There are 6 cases Face ID function will be disabled!
A month has passed since the iPhone X accepted the plan, Apple has launched a new user privacy protection website, and also detailed the working mechanism and privacy protection of the Face ID function in a white paper.
As stated at the press conference, the working principle of Face ID is basically the same as the fingerprint ID based Touch ID.
iPhone X will use the front infrared lens and structured light sensor to obtain feature information of more than 30,000 sampling points on the face. These data will be stored in the processor's separate Secure Enclave with the depth-of-field data collected when the face was recorded, making it difficult to brute force externally.
According to Apple, the probability of fingerprint-based Touch ID being cracked is 1/50000, and the probability of iPhone 3 being 3D face recognition being compromised is one in a million. In other words, Face ID's security is equivalent to 20 times that of Touch ID.
However, in some specific situations, the iOS system still advises entering a six-digit password or pressing a fingerprint while disabling Face ID face recognition. The six conditions are as follows:
The device just turned on or restarted
Device is locked for more than 48 hours
No password was used to unlock the device in the past 6 and a half days, and the device was not unlocked in the last 4 hours.
The device received a remote lock instruction
Face recognition failed after five consecutive attempts
Press and hold either the volume and side buttons simultaneously for 2 seconds to shut down/send the SOS emergency signal
Apple listed the above situations, all of which are iOS devices in a special state. It is necessary to confirm that the owner himself is still using the device at the normal frequency to ensure that the Face ID continues to work.
However, for those with very similar facial features, such as identical twins and other users, Apple still advised them to continue using the fingerprint Touch ID.
This is because the front 3D structured light recognition scheme adopted by the iPhone X, although it is capable of collecting a variety of face data, there is still a possibility that the twins will mutually unlock the device in probability.
In order to ensure that personal information is not leaked, before the new technology breakthrough comes, it has to be conservative in practical use.
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