https://www.newscientist.com/article/2147204-why-the-iphone-xs-face-id-is-a-terrible-way-to-secure-your-data/

Despite its handiness, however, the technology is far from proven. Apple keeps its algorithms under lock and key, meaning we don’t know for sure how well they work, but even the best in the business have woefully low reliability. “I wouldn’t recommend anyone trust an iPhone’s face verification,” says Stefanos Zafeiriou at Imperial College London.

And Apple isn’t the only one using software to recognise faces. Everyone from border control to high-street shops to police forces is trying to get in on the action. How much can we actually trust the technology? And do we want to live in a society where your face is always being tracked?