Introduced by Apple in 2017 on the iPhone 8, then taken on many Android smartphones, facial recognition is very practical. It allows to unlock a smartphone in an instant and, in some cases, to authenticate to download applications or pay for purchases. This biometric system has gradually replaced the fingerprint on several high-end devices. Apple's Face ID system works even in the dark, including wearing sunglasses or makeup. According to Apple, it would be much more reliable than fingerprint detection (the risk of deceiving Face ID would be only 1 in 1 million, against 1 in 50,000 for a fingerprint sensor).
However, this system would not be completely reliable. The American Forbes magazine has just engaged in a small experiment that proves it. A Forbes reporter had his head modeled in 3D (using a very sophisticated scanner using 50 cameras and a 3D printer) and he managed to fool the facial recognition of several smartphones. The bad guys are: Samsung Galaxy S9, Samsung Note 8, LG G7 ThinQ, OnePlus 6. Only the iPhone X did not get fooled.
In fact, this experience teaches us nothing because we already knew that there is facial recognition and facial recognition. The iPhone system, which operates using three sensors, including an infrared sensor, projecting 30,000 points on the face, is far superior to other systems, cheaper, implemented by Asian competitors. Moreover, the manufacturers of these devices have never hidden. The smartphones concerned clearly indicate that facial recognition is a shortcut that does not offer the same level of security as the six-digit code.
Does this mean that Apple's system is foolproof? Not at all. No system is foolproof. Moreover, Face ID has been deceived, in the past, by Japanese researchers who had printed a false head in 3D with photos of eyes and mouth stuck on it. He also confused twins with each other and a mother with her son. Apple is very transparent about the issue and recognizes that the risk of hacking increases with twins or siblings, especially in children under 13 because the facial features are not completely drawn. The use of Face ID is also not recommended for children. On the other hand, you can not abuse face recognition with a simple photo (because the system analyzes the face in 3D). Facial recognition is therefore a very good system provided you do not use any technology.