Since the iPhone X does not have a fingerprint sensor, many customers rely on the Face ID to securely lock and unlock their devices and confirm purchases with Apple Pay. Alternatively, access codes can still be used and are required as a backup when configuring the face ID.
With this in mind, we reviewed Apple's highly informative and highly technical document through Face ID to answer all your questions about this new feature in the iPhone X.
How does the face ID work?
Face ID uses the new TrueDepth Imaging System on the iPhone X, a series of slit cameras and sensors on the top of the phone screen that creates a 3D look of your face. First, the front camera looks for the presence of a face when the camera wakes up. Next, determine the unlocking intent by reading your eyes. If you do not see the iPhone X, face recognition will not unlock the phone.
Once the intention is set, the iPhone X will include a 2D image with a depth map created from the projection of 30,000 infrared points. By using infrared light, facial recognition can also work in the dark.
The TrueDepth camera captures not all faces at once, but segments collected in random order, giving a mathematical representation. All this is done to protect your face data and prevent the access and use of hackers.
These segments are transmitted in Secure Enclave, a subsection of the iPhone X Bionic A11 chipset, where they are compared to similar data stored on the device when you first set up Face Detection.
How does Face ID talk about diversity and appearance changes?
Apple claims that Face ID is formed in a neural network of more than a billion images, using topics from around the world, across genres, ages, and ethnicities. The company has also developed the network through daily changes so as not to be fooled by hats, scarves, goggles or anything else that you can wear on your face.
In addition, Apple says Face ID will not be lost with a beard, haircut or make-up as it updates your facial data recorded over time with successful match segments. This means that your Face ID profile will change as you wish. And if Face ID does not recognize you and prompts you for a password, Face ID will always update your portrait with new segments if you always unlock your device and reach a certain compliance threshold.
When can I not use the face ID?
It may happen that Face Detection is automatically disabled and you are prompted to enter your PIN. Similar to how the Touch ID works after several unsuccessful attempts or after a restart of your iPhone X. In these circumstances, you can not use the Face ID directly from Apple:
The device has just been turned on or restarted
The device has not been unlocked for more than 48 hours.
You did not use your password to unlock the device in the last 156 hours (six and a half days), and the face ID did not unlock the device in the last four hours.
Your phone has received a remote lock command.
There were five failed attempts to join a face.
You have started the emergency / SOS stop by simultaneously pressing the volume button and the side button for 2 seconds. This can be used if you want to switch off the Face ID immediately.
Is it easy to cheat ID?
Face-ID actually uses two neural networks: one to help, and another to prevent counterfeiting. For this reason, Apple says that the iPhone X is smart enough to know when it's wearing a photo or someone wearing a mask, and prevents intruders from blocking the screen.
Whether a duplicate poses a security risk, Apple says that the likelihood of a random stranger unlocking their device is less likely with Face ID than with Touch ID: 1 in 1,000,000 versus 1 in 50,000. Warns the company that the likelihood between twins and brothers is increasing or users under 13 years old. If you are worried, Apple simply recommends unlocking your phone with an access code in the traditional way.
How safe is the face ID?
Apple is anxious to point out that Face ID data never leaves its iPhone X. It is stored locally and encrypted in the secure enclave of the A11 processor. Because of the random and segmented way his portrait is stored, and because the camera retains only the mathematical representation of his face (the images are thrown away after unlocking), Apple says the iPhone X "carefully protects the privacy and security of your biometric information. "
The only situation where your data reaches Apple servers is when you contact AppleCare for help. To do this, you must enable Face Diagnostics, which clears your existing data and prompts you to reconfigure a profile. Your iPhone will record your unlock attempts for the next week, even though you have full control over the samples you submit, and Apple will provide instructions for the proper functioning of the system. You can choose to end the diagnosis at any time. If you do this, all locally stored data will be deleted. We turn to Apple to find out what happens to their copies of these images after they've been used for the diagnosis. We will update this guide as soon as we receive an answer.
Can third-party applications use Face ID?
While third-party applications can use Face ID for authentication, these applications share absolutely no Face ID data. The iPhone X simply sends a message and confirms if the attempt was successful or not. This allows the use of Face ID in all programs, such as B. Touch ID, while the personal identification data is kept away. And as always, you can not use the Face ID as a backup without an access code.
How does Face ID work with Apple Pay?
Whether you use Face ID for a transaction in-store or online, the process is pretty much the same. Double-click on the side button of the iPhone X and confirm your identity with the Face-ID. If you are in a retail store, you would place your iPhone X in the payment terminal at that time. If the transaction does not complete within 30 seconds of authentication, you must double-click the side button again.
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