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Payment card authentication system and method

  • US 20070170247A1
  • Filed: 09/14/2006
  • Published: 07/26/2007
  • Est. Priority Date: 01/20/2006
  • Status: Abandoned Application
First Claim
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1. A method for authenticating payments comprising:

  • an issuer issuing to a user one or more patterns of digit substitution associated with a permanent account number and storing the patterns of digit substitution;

    the user generating a derivative account number by applying one of the patterns of digit substitution to the permanent account number;

    the user transmitting the derivative account number to a merchant;

    the merchant transmitting the derivative account number and transaction information to the issuer for approval; and

    based on the received derivative account number, the issuer retrieving stored information for the corresponding permanent account number and processing an approval.

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