| 摘要 |
A Credit Card holder's telephone number is assigned to his or her credit card as an alias. The cardholder is then required to choose a PIN for security purposes. The telephone number is linked to the cardholder's credit card number via a database. When the cardmember enters into a transaction with a merchant, the card need not be present. The cardmember simply provides his or her telephone number and then the PIN. This can be done at any point of sale such as a store, catalog telephone order, or over the internet. The telephone number and PIN are entered and authorization is returned from the credit card company.
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