finger scans

Overheard: Finger vein ID

Both finger prints and iris patterns can be more prone to copying by a third person. But finger veins are not directly visible to a third person, which makes them more suitable for security use. Hitachi spokesman Atsushi Konno, as quoted in Vein recognition touted for ID systems

I wonder if the finger has to be attached to a live person for this technology to work? That makes it even MORE suitable.