The report said that its journalists were able to unlock Pixel 4 repeatedly with Face Unlock while their eyes were closed, potentially giving other than the owner access to the device. Apple's iPhone uses similar technology, but it doesn't work if one's eyes are closed.
"The obvious problem seems to be that you could use it when someone is sleeping or even dead," says Nasir Memon, professor and founder of the NYU School of Engineering Cyber Security Program at Tandon School of Engineering.
Google warns on its Face Unlock support page that the feature can be misused: "Your phone can also be unlocked by anyone else if it holds up to your face, even if your eyes are closed. "He recommends storing the phone in the front pocket or bag and in" dangerous situations ", completely excluding the unlocking of the face.
The company's new phones are not yet available to the public: the Pixel 4 and 4 XL ship on October 24 [1