I think something like this should replace credit cards used today (or at least having it as an option seeing the price). Authentication on the card could be ex

I think something like this should replace credit cards used today (or at least having it as an option seeing the price). Authentication on the card could be extremely useful and secure. They should ditch the magnetic stripe tho, it's completely insecure, use only the chip. Situations: 1) someone steals your pin code (there are overlay devices for ATMs, could happen), after that they steal your card (they can't clone it since it does not have a magnetic stripe). They can't use it since it has locked itself (default state being locked, unlock before transactions). 2) Buy something online, specify that you buy with plastc, it guides you to a challenge response authentication page. Type the challenge in the card, type back the response to the page. They hack the site, get every credit card info and your money on your bank account remains safe.