Apple's Craig Federighi Answers Face ID Questions in New Interview

Face ID, Apple's new facial recognition feature in the iPhone X, has left users with a lot of questions about how it works. While Apple has offered detailed explanations of Face ID on its website, there continue to be questions and concerns given that this is a new biometric system.

To answer some of those questions, Apple software engineering chief Craig Federighi did a telephone interview with TechCrunch, where he covered topics on privacy, security, and functionality.

faceidangle
TechCrunch's Matthew Panzarino, who spoke to Federighi, says he's heard Face ID is "incredibly reliable" and "very fast," worth noting because many people have wondered how quickly it works.

According to Federighi, Face ID needs to see your eyes, nose, and mouth, so there are some situations where it won't work and a passcode will need to be used instead. The limitations are similar to the limitations with Touch ID, which, for example, prevent it from being used with gloves.

"If you're a surgeon or someone who wears a garment that covers your face, it's not going to work," says Federighi. "But if you're wearing a helmet or scarf it works quite well."

Panzarino asked Federighi to expand on how the feature works with sunglasses and whether polarization is an issue, following confirmation earlier this week that Face ID is compatible with most pairs. Federighi says polarization isn't a problem, but there are some lenses that have a coating that blocks IR, and if that's the case, a customer will need to use a passcode or take them off.

Face ID will work from multiple angles and distances when a device is held at a natural angle, but it needs to see your face.

"It's quite similar to the ranges you'd be at if you put your phone in front facing camera mode [to take a picture]," says Federighi. Once your space from eyes to mouth come into view that would be the matching range - it can work at fairly extreme angles -- if it's down low because your phone is in your lap it can unlock it as long as it can see those features. Basically, If you're using your phone across a natural series of angles it can unlock it."

When it comes to security, Apple says that all Face ID processing is done on device with nothing uploaded to the cloud or Apple's servers, a point Federighi reiterated in the interview. Apple collects no data when the TrueDepth camera in the iPhone X scans your face, and the feature that allows Face ID to adapt to appearance changes is done entirely on device.

"We do not gather customer data when you enroll in Face ID, it stays on your device, we do not send it to the cloud for training data," he said.

When it comes to law enforcement requests for Face ID data, Apple has no data to provide. Your Face ID scan is converted into a mathematical model in the Secure Enclave on the iPhone X, and it can't be reverse engineered back into a face. As with Touch ID, none of that data is ever sent to Apple. Third-party developers don't have access, either.

Federighi also expanded a bit on the method Apple implemented to discreetly disable Face ID in a situation where someone might steal your phone and attempt to unlock it with your face. On the iPhone X, holding down on the buttons on either side of the device goes to the power down screen, which also disables Face ID. If someone demands your phone, squeeze the buttons to disable Face ID, Federighi suggests.

Face ID will also disable itself after five failed attempts at recognition. Earlier this week, Apple documentation suggested it would be disabled after two failed recognition attempts, but Federighi has clarified that it's five, just like Touch ID. Apple's documentation has now been updated accordingly. Also, when the iPhone reboots or Face ID hasn't been used in 48 hours, a passcode will be required. Additionally, if you haven't entered a passcode for 6.5 days and Face ID hasn't been used in the last four hours, Face ID will also be disabled until a passcode is entered.

Federighi's full interview, which includes more details on how Apple trained Face ID and how it works, can be read over at TechCrunch.

Related Forum: iPhone

Top Rated Comments

macTW Avatar
81 months ago
So on my motorcycle.

Previous: Take off right hand leather glove use phone.

The Future: Take off right hand leather glove, Take off glasses, take off full face crash helmet, LOOK at phone, use phone, put crash helmet back on, put glasses back on.
So on your motorcycle.

Use passcode.

Problem solved.
Score: 32 Votes (Like | Disagree)
unobtainium Avatar
81 months ago
So on my motorcycle.

Previous: Take off right hand leather glove use phone.

The Future: Take off right hand leather glove, Take off glasses, take off full face crash helmet, LOOK at phone, use phone, put crash helmet back on, put glasses back on.
How about don't use your phone while riding a motorbike?

Anyway, it's funny to see Apple in full-on PR damage control mode.
Score: 19 Votes (Like | Disagree)
Reach9 Avatar
81 months ago
Bring back Touch ID under the glass for next year’s iPhone!
Score: 16 Votes (Like | Disagree)
Piggie Avatar
81 months ago
So on my motorcycle.

Previous: Take off right hand leather glove use phone.

The Future: Take off right hand leather glove, Take off glasses, take off full face crash helmet, LOOK at phone, use phone, put crash helmet back on, put glasses back on.
Score: 11 Votes (Like | Disagree)
hasanahmad Avatar
81 months ago
How about don't use your phone while riding a motorbike?

Anyway, it's funny to see Apple in full-on PR damage control mode.
The company asked for an interview. its funny to see a scheduled interview being labelled as PR damage control
Score: 10 Votes (Like | Disagree)
Menopause Avatar
81 months ago
Well, sh...



Attachment Image
Score: 8 Votes (Like | Disagree)

Popular Stories

Apple Logo

Apple Discontinued These 5 Products This Year

Monday November 27, 2023 7:03 am PST by
As the end of 2023 nears, now is a good opportunity to look back at some of the devices and accessories that Apple discontinued throughout the year. Apple products discontinued in 2023 include the iPhone 13 mini, 13-inch MacBook Pro, MagSafe Battery Pack, MagSafe Duo Charger, and leather accessories. Also check out our lists of Apple products discontinued in 2022 and 2021. iPhone Mini ...
ios 17 namedrop

Police Departments and News Sites Spreading Misinformation About How iOS 17 NameDrop Feature Works

Monday November 27, 2023 5:11 pm PST by
Apple with iOS 17.1 and watchOS 10.1 introduced a new NameDrop feature that is designed to allow users to place Apple devices near one another to quickly exchange contact information. Sharing contact information is done with explicit user permission, but some news organizations and police departments have been spreading misinformation about how functions. As noted by The Washington Post,...
iOS 17

26 New Things Your iPhone Can Do With Next Month's iOS 17.2 Update

Wednesday November 22, 2023 10:57 pm PST by
Apple made the first beta of iOS 17.2 available to developers in October. Since then we've seen two more betas, and with each iteration Apple continues to add more new features and changes, many of which users have been anticipating for quite a while. Below, we've listed 26 new things that are coming to your iPhone when the finalized version is publicly released in December. 1. Help You...
iOS 17

iOS 17.1.2 Update for iPhone Likely to Be Released This Week

Monday November 27, 2023 8:24 am PST by
Apple will likely release iOS 17.1.2 this week, based on mounting evidence of the software in our website's analytics logs in recent days. As a minor update, iOS 17.1.2 should be focused on bug fixes, but it's unclear exactly which issues might be addressed. Some users have continued to experience Wi-Fi issues on iOS 17.1.1, so perhaps iOS 17.1.2 will include the same fix for Wi-Fi...
Cyber Monday Deals Feature 2022

40+ Apple Cyber Week Deals for AirPods, iPad, Apple Watch, and More

Sunday November 26, 2023 9:47 am PST by
Cyber Week has taken the place of Black Friday, and you'll find some of the same deals still around for the next few days, although many from Black Friday have now expired. This includes dozens of record low prices on Apple products like AirPods, iPad, Apple Watch, MacBook, iPhone, and more. Note: MacRumors is an affiliate partner with some of these vendors. When you click a link and make a...
General Black Friday Deals 2022 Green

40+ Apple Black Friday Deals Still Available for AirPods, iPhone, iPad and More

Friday November 24, 2023 5:01 am PST by
Black Friday 2023 has officially ended, but we're still tracking some of the best deals of the year on Apple products like AirPods, iPad, iPhone, MacBook, and many more. Note: MacRumors is an affiliate partner with some of these vendors. When you click a link and make a purchase, we may receive a small payment, which helps us keep the site running. Specifically, in this article we're...