More recently, it’s been all about palm-vein scanning, and Tapo’s latest smart lock is a perfect example of this. The new Tapo PalmKey Smart Door Lock has palm-vein recognition technology that ...

This ambitious smart lock may well bite off more than it can chew, with a mountain of features that don’t quite work ...

by inserting their credit card and hovering their hand over a special scanning device. The system will read unique identifiers on your palm, such as lines, ridges and vein patterns, and link that ...