IPhone face recognition is undoubtedly the most popular topic recently.
With the understanding of Apple’s facial recognition function, people begin to ask questions about the effect, safety and creativity of face recognition. To get the answer, I spoke with Apple’s vice president of software engineering, Craig Federighi. We have discussed some common problems quickly, and I have been asking and listening to those users who have been using this function for a long time. I hope we can clarify some problems.
1. How can face recognition be made?
At the press conference, the Apple Corp’s Phil Schiller mentioned that Apple has collected one billion pictures to train face recognition, and Federighi says the apple has done more than that.
“Phil mentioned that we collected one billion photos and collected data around the world to ensure that we have a wide range of geographic and ethnic data sets. The two methods are to test and verify the high recognition rate. “This is not something you can download from the Internet,” Federighi said. Especially considering that these data need to contain a high fidelity face data depth map. Therefore, Federighi said that the Apple Corp went out, got the consent of the subjects, and provided “very detailed” scanning. These scans are taken from multiple angles, which contain a large number of details, which are used to train facial recognition systems.
I asked how Apple was dealing with these training data.
“We do keep the high precision depth map of the training data we protect,” Federighi said. “When we train these models and iterate over these algorithms, you need original sensor data to use, develop, and optimize them, when the customer – the user – Apple itself is not collected, is not collected. “.” Federighi is very clear at this point.
“We don’t collect user data,” he said. “When you register Face ID, it will stay on your device, and we don’t send it to the cloud for data training.”
Face recognition has an adaptive feature that allows you to continue to recognize your face after you change your hairstyle, grow your beard or your face. This adaptation is done entirely on equipment, retraining and deep learning in the redesigned Secure Enclave. These training and retraining are not done in Apple’s cloud.
Apple Corp said it would not open the data to anyone at any price. This is a good time to discuss another hot topic: safety.
2. The security and privacy of face recognition
A major problem about face recognition is how Apple will handle the enforcement requests for facial data.
This simple answer is exactly the same as that of fingerprint identification, and apple can not even give it to law enforcement agencies. Apple never receives these data, whether it is anonymous or not. When you train data, it is immediately stored on Secure Enclave, as a mathematical model, can not be turned back into a “facial model”. Any retraining is on your device, which answers the question of whether Apple is managing the data of American underage users, but this is not the case.
I also asked Federighi if Apple had ever thought of enabling security conscious people to enable one mode to unlock devices using face ID and password. A dual authentication combines digital and biometric factors. Federighi said: “we did discuss this problem internally. Some of us are very interested in this. ” He points out that there are some cases you need to consider, such as the users who scrape the big beard to the mobile phone, and what we need to do is that you need a spare super long password.
I also asked Federighi about the specific way you “quickly shut off” the face ID when the police stopped or was asked to hand over the cell phone by the police.
“On the old mobile phone, the power key can be banned 5 times, but on iPhone 8 and iPhone X and other new mobile phones, if you hold the side button on both sides of the cell phone, the phone will turn off. But this can also cause facial recognition failure, “Federighi said.” so, “so, when the thief asks you to hand over your cell phone – you can put your hand in your pocket and hold the side key, face recognition will fail, in iPhone 8 do the same thing can also disable fingerprint identification, while holding down the volume key and power key, in me It seems that this is a better solution than “press the 5 power button”, because it is not so abrupt. When you do this, it will return your password by default. “
This is a bit out of the question, but what I want to point out is that Face ID doesn’t make visible light, and I see some misunderstandings on social media that it will light up the face. Not really. It only uses infrared rays and existing light, which means it will work in the dark, and there is no brighter light than the mobile phone screen.