idea: use this technology for atm cards. you authenticate to your card by punching in your pin on its built in pad, then feed the atm your activated card. the c

idea: use this technology for atm cards. you authenticate to your card by punching in your pin on its built in pad, then feed the atm your activated card. the card transmits a one time use number to the atm. this way, the atm never gets your pin, and your card data is never good for more than one use.