Craig Federighi: Apple Focused on Single-User Face ID, Touch ID Was Never Intended for Multiple Users

Apple's current focus with Face ID is on single-user authentication, suggesting support for multiple faces won't be added in the near future, according to an email from the company's software engineering chief Craig Federighi.


By comparison, Touch ID can store up to five fingerprints, and each of those fingerprints can belong to a different person. This allows a married couple, for example, to be able to securely authenticate a single iPhone.

In an email to a customer, however, Federighi admitted that Touch ID's multi-finger support has always been intended for a single iPhone owner to authenticate with a finger or thumb on both the left and right hand if desired.

Federighi added that Face ID could eventually authenticate multiple faces as the system evolves in the future, but his email makes it clear that Apple doesn't have any immediate plans to implement said functionality.

MacRumors since publishing this article has received full headers that verify this email, originally shared on Reddit. We can confirm the email originates from Apple's servers at its headquarters in Cupertino, California.

A screenshot of Craig Federighi's alleged email response to a customer

Apple says Face ID has a one in 1,000,000 chance of a false match, compared to one in 50,000 for Touch ID, although the probability is higher among identical twins, siblings who look alike, and children.

Vietnamese security firm Bkav has also been able to spoof Face ID twice with 3D printed masks, but the steps involved are quite complex and this isn't something the average user should be very concerned about.

In practical, real-world usage, Face ID has proved to be very secure and reliable. But, at least for now, it appears that iPhone X owners won't be able to extend this convenience to their trusted family members or friends.

Top Rated Comments

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38 months ago

Touch ID was never intended for multiple users? That's B.S. They built Touch ID to support five fingers. Who is going to register five of their own fingers for Touch ID?!

I registered 4 out of 10 of mine. Both thumbs and both pointing fingers.
Score: 41 Votes (Like | Disagree)
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38 months ago
If that’s the case then can Craig please explain why Touch ID is used to switch user accounts on the MacBook with touchbar?
Score: 33 Votes (Like | Disagree)
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38 months ago
yea it's tough entering those 4 numbers
Score: 27 Votes (Like | Disagree)
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38 months ago

Touch ID was never intended for multiple users? That's B.S. They built Touch ID to support five fingers. Who is going to register five of their own fingers for Touch ID?!

If that was a real question - I guess you mean me? I have had four different fingers registered since I first started using a 5s. Fifth position is for my nose. (Yes, my nose), when I have my furry gloves on. :D
Score: 26 Votes (Like | Disagree)
Avatar
38 months ago

Touch ID was never intended for multiple users? That's B.S. They built Touch ID to support five fingers. Who is going to register five of their own fingers for Touch ID?!

Somebody with more than four fingers, I'd imagine. That about covers most of Apple's customers.

Up to five fingers. They gave the option. It wasn't mandatory to register five and it doesn't imply it was meant for multiple users.

If humans had three heads, I imagine Face ID would also support multiple faces, but not for the intended purpose of being used by multiple users.
Score: 25 Votes (Like | Disagree)
Avatar
38 months ago
Sort of explains why iPad still has no user managing in the year 2017. PC replacement my ass
Score: 20 Votes (Like | Disagree)

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