Novel Time-Stamped Digital Card (TSDC) to Determine User’s Identity

Time-stamped digital signature scheme can be employed to derive a new solution that improves the authentication, non-repudiation and data integrity of current payment gateway. This paper suggests designing a new method to process online payment transactions by adding an additional step to the current payment gateway which will verify the bank cardholder’s identity through a trusted third party, a certificate authority (CA). Therefore, a new Time-Stamped Digital Card (TSDC), which relies on the concept of asymmetrical key algorithm to accomplish its task, will be proposed. Time stamp is examined to determine how old the TSDC is and whether it has been previously used or not. It will also be used to prevent replay attack. The protocol of TSDC consists of five steps and has been analyzed. TSDC needs to be generated, signed and submitted to the payment gateway along with the credit card information by the customer prior to processing any online transaction for identification purposes. Therefore, TSDC aims to reduce the high volume of fraud transactions and suspicious activities currently experienced during payment gateway due to lack of identity verification of bank cardholders.