A CREDIT CARD SETTLEMENT SYSTEM AND METHOD FOR PREVENTING THE ILLEGAL MANIPULATION OF A CREDIT CARD SETTLEMENT DATA

摘要

PURPOSE: A credit card system and method thereof are provided to prevent illegal modification for the selling the product and to prevent manipulation of credit card payment data. CONSTITUTION: A purchaser requests approval cancellation about corresponding transactions through a credit card payment machine. The credit card payment machine transmits approval detail and cancel detail to a VAN(Value Added Network) company server(S60). The VAN company server receiving an approval cancellation request demands an authentication number(S70).