Creditcard secret number which is divided by cash service and credit buying service in credit buying processor first contrasting credit buying secret number

摘要

PURPOSE: A credit card password classification assignment, and a credit purchase process after comparing a credit purchase password are provided to prevent a card company, a card affiliate and a card owner from suffering a loss caused by a stolen use of credit card before the credit card owner reports the lost card. CONSTITUTION: The credit card having an assigned password for the cash service and credit purchase is read by a card reader for the credit purchase(S2). The card reader confirms the equality of credit purchase password of credit card before requesting an approval of credit purchase to a main computer of a card company(S3). In case of equal, the purchase approval is requested to the main server(S4). In case of not equal, the password is inputted again. Still the password is wrong, the card is canceled(S5).