What is Face ID? How to use it?
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What is Face ID? How to use it?


Apple launched the iPhone X in September 2017, the first iPhone to be redesigned in three years. Unlike previous iPhones, the iPhone X ships without Touch ID. Instead, Apple has launched Face ID. Since then, this new authentication tool has been available on iPhone XR, iPhone XS, iPhone XS Max, 11-inch iPad Pro and third-generation 12.9-inch iPad Pro. To date, Face ID is not yet available on other Apple products like the MacBook Pro. These products still offer Touch ID.

Learn about Face ID technology

  • What is Face ID?
  • How is the security of Face ID?
  • Set up Face ID

    • How to set up Face ID
    • Set up multiple faces for Face ID
  • Use Face ID

    • Unlock device with Face ID
    • Buy with Face ID
    • Use your face to log into some apps or websites
  • Limit Face ID usage

What is Face ID?

True to its name, Face ID uses your face to unlock the device, using the biometric authentication feature. The tool can also be used to make digital payments, access sensitive data and provide detailed facial tracking capabilities for Apple Animoji.

In terms of hardware, Face ID uses an integrated sensor consisting of 3 modules. The first of these modules is Dot Projector, Use 30,000 invisible infrared points placed digitally on the user’s face. Next, the module Flood Illuminator Use the collected Dot Projector information to create 3D face depth maps. The third module is one infrared camera, responsible for taking photos of users.

All this is done within seconds whenever someone lifts their mobile device to the level of their face. From there, the system determines if the newly created map matches the map of the registered user.

According to Apple, the system can recognize and adapt to changes in someone’s appearance:

“Face ID automatically adapts to changes in your appearance, such as when you wear makeup or grow facial hair. If there is a significant change in appearance (such as a clean shave), Face ID will confirm your identity by requiring a passcode (password) before updating your face data. Face ID is designed to work even when users wear hats, scarves, glasses, contact lenses, and sunglasses. Moreover, this feature is designed to work indoors, outdoors and even in complete darkness. ”

What is Face ID?

How is the security of Face ID?

Apple says a lot of protections are in place when it comes to Face ID. The focus of these measures is Secure Enclave, where face depth maps and infrared images are stored directly on the device and encrypted. The “key” to unlock the device is stored in that Secure Enclave and is not sent to Apple or any other third party. It is also not backed up to iCloud or anywhere else separate from your device.

In addition, there is an additional safeguard: Apple only allowed 5 unsuccessful face attempts before requiring a passcode on the device.

Furthermore, Apple does not allow the use of Face ID in the following cases:

  • The device has just been turned on or restarted.
  • This device has not been unlocked for more than 48 hours.
  • Passcode has not been used to unlock the device for the past 6.5 days, and Face ID has not been used to unlock the device for the previous 4 hours.
  • The device has received the remote lock command.
  • After starting the power off or entering Emergency SOS mode, by pressing and holding the volume button plus the Side button simultaneously for 2 seconds.

According to Apple’s latest data, the probability that a person can randomly open a mobile device with Face ID is approximately 1 in 1 million.

Be scrutinized right from the start

When a new authentication tool is released, security issues will be scrutinized. Ever since the launch, many users have been worried about whether Face ID can see the difference between twins and there are also rumors of a special mask that can unlock mobile devices. automatically use Face ID. However, experiments on a 36-year-old twins with Face ID of iPhone X gave surprising results. In addition, Face ID seems to include technology that does not allow a device to be unlocked without the owner of the phone.

To date, specifically in the United States, there is no law that allows police to force someone to open their device with Face ID. In January 2019, a U.S. federal judge ruled that police cannot force someone to unlock their device with Face ID or Touch ID. However, this may change in the future.

There is currently no law requiring someone to unlock their device with Face ID

Set up Face ID

You will set up Face ID during the installation process on your new Apple device and you can always change your Face ID later, if you like.

How to set up Face ID

1. Move to Settings> Face ID & Passcode.

2. If asked, enter the password.

3. Click Set Up Face ID.

4. With the device in portrait mode, place the face in the window on the device.

5. Click Get Started.

6. Gently move your head to complete the circle.

7. Click tiếp tục when you complete the first Face ID scan.

8. Move your head around the circle a second time.

9. Click Done.

Set up Face ID

If you are using iPhone X, please refer to the article: How to set up Face ID on iPhone X for details.

Set up multiple faces for Face ID

Officially, you can’t use Face ID for multiple people on one device. However, using the tool Alternative Appearance (Set up an alternate face) Apple, you can basically do that. Check out the article: How to set up multiple faces for Face ID in iOS 12 to know how.

Use Face ID

When Face ID is set up on your device, you’re ready to use it! There are 3 ways to use this tool: Unlock your device, make a purchase, and log in to certain applications or websites.

Unlock device with Face ID

1. Lift to “wake up” your mobile device or touch the screen.

2. On iPhone, keep your device in portrait mode. On iPad, you can use Face ID in portrait or landscape mode.

3. Swipe up from the bottom of the screen to unlock.

After authentication, your device will be unlocked.

Buy with Face ID

You can use Face ID to make purchases anywhere that accepts Apple Pay. Face ID also works in the iTunes Store, App Store, and Book Store in Apple Books.

To purchase in these stores, you do the following:

1. Make sure you are using an iPhone.

2. To use the default card, double click the button Side.

3. To use another card, double-click the button Side, Click the default card, then select another card.

4. Look at iPhone to authenticate with Face ID.

5. Keep the top of the iPhone close to the contactless reader.

6. Wait for notification Done and a display checkmark.

Use Face ID to make purchases

To make a purchase in an app or on a website in Safari, do the following:

1. Click the button Buy with Apple Pay or choose Apple Pay as the payment method.

2. Confirm the payment information.

3. To select another card at checkout, tap > next to your card.

4. Double click the button Side.

5. Look at iPhone or iPad.

6. Wait for notification Done and a display checkmark.

One of Apple’s online stores:

1. Open the iTunes Store, App Store or Book Store, then click the item you want to buy.

2. When prompted for payment, double click the button Side.

3. Look at your iPhone or iPad.

4. Wait for notification Done and a display checkmark.

Use your face to log into some apps or websites

Finally, you can use Face ID to access some apps or websites:

App:

1. Open the application that supports Face ID and press login.

2. If asked, allow the application to use your username or password.

3. Look at your iPhone or iPad to log in.

For websites:

1. Open Safari and go to a website.

2. Click the login field. If you see your username or password appear above the keyboard, tap it.

3. Look at your iPhone or iPad to automatically fill in your username and password.

That is all you need to do! You have successfully logged into your favorite application or website.

Limit Face ID usage

If you don’t use Face ID to make purchases or open apps / websites, you can turn off these options.

1. Move to Settings> Face ID & Passcode.

2. If asked, enter your password.

From this screen, you can switch:

  • iPhone Unlock
  • iTunes & App Store
  • Apple Pay
  • Password AutoFill

Moreover, you can also restrict apps that can use Face ID for authentication.

Restricting apps that can use Face ID

Face ID may appear on future Apple devices, including the 2019 iPhone and iPad models. Currently, it is not known whether this technology will extend to other Apple products.

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