Systems and methods for mitigating identity theft associated with use of credit and debit cards

摘要

The methods and systems of the present invention addresses the problem of identity theft associated with the use of a credit/debit card. A security code having a predetermined expiration, or equivalently lifetime, is generated. The cardholder is informed that his/her current security code is ready for downloading by sending a "security code ready" message to the cardholder. On receiving a transaction from the cardholder with an included a second security code, the security code is verified against the current, that is, the presently unexpired, security code.