CVC of a credit card means the last three yards.

the last three codes, namely CVC(CardVerificationCode), are additional codes printed on the back of credit cards, also called CVV.

(CardVerificationValue), that is, the credit card verification value. The display position is on the back of the credit card, and the top at the end of the signature is displayed in italics. The first four digits are the card number and the last three digits are the verification code, that is, the last three codes.

Note, this verification code does not refer to the password of the credit card, and you can book a flight by phone. You just need to enter the bank card number and the three digits behind it, as well as the validity period of the credit card. There is no password at all.

At noon yesterday, the customer service staff of Ctrip.com told the reporter that the information needed to purchase air tickets by credit card is: card number, credit card validity period, "last three" verification code and cardholder ID number.

the use of credit cards can be divided into "card-passing transaction" and "offline transaction". In the former, the cardholder uses the credit card to swipe the card at POS terminals such as shopping malls and supermarkets, sign for authorization, and then complete the transaction. Off-line transactions are common when cardholders book hotels, air tickets, or pay online. Merchants also provide credit card account numbers and the last three codes through the POS system to complete the transaction.

the last three codes are the last three digits on the back of a series of cards, which are generated by the coding rules and encryption algorithm of the issuing bank. In the payment process, if the merchant provides the last three codes to the bank, the bank will obtain the cardholder's authorization for the merchant by default, thus allowing the transaction.

Extended information:

Risks in the last three codes:

At present, many domestic airlines and booking websites do not need to enter a password for credit card payment services, and they can successfully pay as long as they provide information such as card number, expiration date and verification code to the website. Therefore, relevant information such as credit card number is particularly important, and such information is easily obtained by people who know each other.

the last three codes are extremely critical in offline transactions, which brings convenience to cardholders and merchants. Cooperate with qualified merchants, and the merchants will freeze a part of the funds before the cardholder consumes. After the cardholder signs the money, the merchants can officially deduct this part of the funds, so as to avoid the phenomenon of running orders as much as possible.

Baidu Encyclopedia-Last Three Codes