the credit card cvc code refers to the check code of MasterCard, which is recorded in the magnetic stripe of the credit card and cannot be seen. After this set of numbers is generated, only the issuing bank and the holder of the bank card know what the number is.
cvc is a credit Card Security Code, which is the full name of card security code. It is the security code that credit cards need when conducting online or telephone transactions. Its generation method is that the bank extracts the card account number, validity period and service code, arranges them and then calculates them by the bank's own algorithm. The cvc code is displayed on the back of the credit card. The last three digits in italics above the signature are the verification code for commercial banks to ensure the security of credit card passwords, and the first four digits are generally the card number.