The first time I forgot to take my mask off before using the facial recognition login to my Windows 10 computer, it wouldn't work (which I expected). After a couple times, though, it started logging me in before I had a chance to take my mask off. Is it a security issue that the facial recognition can recognize me with a mask? If, say, one of my brothers who look very similar to me (not that I have issues with them accessing my computer, but someone else might look sufficiently alike) were to put on a mask and wear my glasses, would the facial recognition know the difference?
I'd be interested to hear what exactly Windows Hello takes into account when scanning your face, that might help me know whether whatever is hidden by the mask is important to its algorithms. All that I can think of that's out of my mask are my eyes... Can it recognize me only from that? How accurately?