Method and system for conducting secure payments over a...

Details Method and system for conducting secure payments over a... Method and system for conducting secure payments over a...

2007-02-13

2007-02-13

Worjloh, Jalatee (Department: 3621)

Data processing: financial, business practice, management, or co

Business processing using cryptography

Secure transaction

C705S065000, C705S075000, C705S076000, C705S079000, C713S002000, C713S182000, C713S155000, C380S277000, C380S255000, C726S002000, C726S004000, C726S005000, C726S009000

Reexamination Certificate

active

09886486

ABSTRACT:
A method is provided for conducting an electronic transaction with a payment account number having a certain amount of available funds, using a payment network and a “check site”. The method comprises the following steps: (a) generating a secret key associated with the payment account number; (b) using the secret key to generate a message authentication code (“MAC”) specific to the transaction; (c) generating an authorization request message including the message authentication code; (d) forwarding the authorization request message over the payment network to the check site for verifying the authenticity of the MAC; (e) verifying the message authentication code by the check site using the secret key; (f) responding to the authorization request message over the payment network based on the available funds and the transaction amount.

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Bruce Schneier, “Applied Cryptography,” John Wiley & Sons, Inc., New York, XP002188917, pp. 455-459.

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