Patent ID: 8515872
Filing Date: 2013-08-20
Classification: G06Q,G07F

Abstract:
1. A method comprising: generating a transaction security code in a proximity payment device; receiving, by a computer, an authorization request for a purchase transaction, the authorization request including the transaction security code read from the proximity payment device by a proximity reader of a point of sale terminal and an indication that the purchase transaction was initiated by proximity-reading the proximity payment device; determining that the purchase transaction is eligible for security code checking based on whether an account number included in the authorization request is in a proximity-device-only eligible account number range; determining, by the computer, that the purchase transaction was initiated by proximity-reading the proximity payment device based on the indication included in the authorization request; determining by the computer that the transaction security code included in the authorization request is valid; and relaying the authorization request from the computer to an issuer financial institution with an indication as to whether the transaction security code is valid.