How to wear a mask to unlock Apple 12?

How to unlock Apple 12 with a mask? Recently, Tencent Security Xuanwu Lab released the latest research results on Apple's Face ID: it takes only three steps to unlock the iPhone with a mask in one minute. This method takes advantage of the mirror matching feature of Face ID, which is equivalent to inputting different half faces as templates, and users can successfully unlock them when wearing or taking off the mask.

How to unlock iPhone with Face ID when wearing a mask:

Step 1: Take a mask and fold it in half to block half of your face. You can cover your face with a mask, or you can hang two ear lanyards on one ear after overlapping.

Tips:

1. The mask should stick to the face as much as possible to avoid obvious wrinkles;

2. The upper corner of the mask should cover half of the tip of the nose;

3. If you use the ear hanging method, you can cover half of your face with a mask because your face is big or your ears are backward.

Step 2: Keep the face half hidden and set the Face ID.

Tips:

1. If there is a hint that someone's face is blocked on the mobile phone, you can gradually reduce the pulling force while observing the screen until the circular framing screen for face input is triggered;

2. You can deliberately let the mask slightly cross the midline of the face, causing excessive occlusion, and then find the critical point through the above method to gradually reduce occlusion. The face entering at the critical point has the highest success rate.

Step 3: After triggering the face input screen, keep the relative position between the mask and the face unchanged, and input the face in a circle with the head, or keep the head still and let the phone rotate around the head.

After completing the above settings, you can try to unlock the phone with the mask open and closed.

In addition, because the test mask can not cover all mask types on the market, and everyone's face is different, there is a certain probability of failure.

Other issues in this study:

Q: What should I do if the unlocking is unsuccessful or the success rate is not high?

A: The first and second steps should be strictly in accordance with the description; When wearing a mask, it is necessary to adjust the wire at the nose to make the mask close to the bridge of the nose; You can't wear a mask too high. At the same time, you can try to unlock the mobile phone two or three times after the face entry in the third step is completed, and then gradually increase the shielding area of the mask and unlock it two or three times.

Q: Can this method only be used on the iPhone? Is Android okay?

A: Android phones generally have a face and fingerprint unlocking function, just use fingerprints.

Q: Is this method safe? Can someone else wear a mask to unlock the phone after it is lost?

A: From a technical point of view, the feature space of the face above the nose is still rich enough, and even after wearing a mask, some 3D contour information of the nose and mouth can still be used by Face ID, and others cannot be unlocked at will. However, although we think this method can be used temporarily during the epidemic, we can't make any guarantee about what may happen after using this method.

Q: Can you cover half your face with white paper instead of a mask?

A: The success rate of this operation will be lower. Because the reflectivity of the paper used for Face ID is different from that of the mask cloth, and the paper is easily deformed. In addition, this method will make Face ID lose all the three-dimensional features of the occluded part, thus reducing the security to a greater extent.

Q: After entering with one mask, can I wear another mask to unlock it?

A: As long as the difference between the two masks is not too big, it can be unlocked across the masks.