CVC is called card verification code, also called card security code. It is a three-digit number, usually printed on the signature column on the back of a credit card or debit card. The main purpose of CVC is to increase the security of credit card or debit card transactions. When you make online shopping or face-to-face transactions, you need to enter the CVC code, which can help merchants or payment institutions to confirm that you are a real cardholder.

The introduction of CVC code is to increase the security of online shopping or face-to-face transaction. Because in this case, the merchant cannot confirm whether the cardholder is a real cardholder. Without the verification method of CVC code, people with bad intentions may use other people's credit cards for consumption, causing economic losses to cardholders. Therefore, entering the correct CVC code in the transaction process can better ensure the security of the transaction.

Personal information of cardholders is very important, and using CVC code can better protect users' privacy. For example, in the pre-authorization transaction, the merchant can verify the validity of the credit card, but before the transaction is completed, the merchant cannot check the CVC code of the cardholder, which not only ensures the payment safety of the cardholder, but also protects the personal privacy. The introduction of CVC code effectively prevents the credit card from being stolen.