You're right that it displays the last four, but the whole reason why the cashier has to type in the last four digits is a check that the physical imprinted numbers on the front of the card match the data on the magnetic stripe.
Typing in the last four on the coin completely bypasses this anti fraud measure since the last four will always match on the coin because the digits it displays come directly from the magnetic stripe data.
Cool product. I want it to work, but I fear it won't be widely accepted.
That said, if they were to license the visa and mastercard logos for it, that would probably be enough to get it accepted during most transactions by cashiers who aren't savvy or don't care.
Typing in the last four on the coin completely bypasses this anti fraud measure since the last four will always match on the coin because the digits it displays come directly from the magnetic stripe data.
Cool product. I want it to work, but I fear it won't be widely accepted.
That said, if they were to license the visa and mastercard logos for it, that would probably be enough to get it accepted during most transactions by cashiers who aren't savvy or don't care.