Face Off
The website is updated with a fifth means by which the concept can be implemented to advantage in the form of a portable app, and one that circumvents GDPR issues as well as the cost and copyright associated with using portraits from whichever source.
I've taken a photo of my ginger-beer, which is not something I do on a regular basis but among a random set of drink images it would be the only one that I recognise, and instantly so.
Simple, safe and as unique a user-experience as you could hope for in securing screen access?
We call it a 'snow-globe' moment and for those who've done their homework, you'll know what that means.
Keep drinking the Kool-Aid.