| 摘要 |
A method and system verifies the validity of a credit card payment transaction with a set of requester account data by searching an account record database for a matched record containing a record account number that matches the requester account number and an expected verification key that matches the requester verification key, said expected verification key changes after each successful payment transaction validation, according to a pre-determined list of values to enhance the security and robustness of account transactions. Also, the present invention provides a method and system that is cost-effective to implement and highly compatible with the current account verification procedure.
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