| 摘要 |
The invention provides a method for performing card authentication of a bank card. The method comprises reading a first liquid encoded number (LENcard) from a bank card; transmitting the LENcard to an authorisation server, the authorisation server interfaced to an authorisation database; retrieving at least a further liquid encoded number (LENcurrent) from the authorisation database; and comparing LENcard and LENcurrent. If the LENcard is not equal to the LENcurrent then if the bank card is a new card, the method includes processing the bank card as a new card otherwise processing the bank card as a fraudulent card. If the LENcard equals the LENcurrent, then the method includes generating a further liquid encoded number (LENnew); writing the LENnew to the bank card in place of the LENcard; and writing the LENnew to the authorisation database in place of the LENcurrent.
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