CVC (Card Verification Code) is an additional code printed on the back of a credit card, also called CVV (Card Verification Value), which is a credit card verification value, and some are called CID, which is a credit card security code or a personal security code. All names refer to the same verification code. CVV and CVC are generated in the same way, but they are called in different ways.

The security code of VISA card is called CVV2 (card verification value 2), which has 3 digits and is printed on the last 4 digits of the card number on the back of the credit card.

MarsterCard's security code is called CVC2 (Card Verification Code 2), which has 3 digits and is printed on the last 4 digits of the card number on the back of the credit card.

Extended data

CVV2, CVC2, CVN2 and CSC2 are all verification codes, which are used by bank cards for transactions in indirect credit card consumption occasions, such as online payment. CVV2, CVC2, CVN2 and CSC2 can identify whether there is a bank card transaction. It can generally be seen in the last three digits of a series of signature columns on the back of bank cards.

The UnionPay standard card organized by UnionPay is called CVN2, MasterCard is called CVC2, VISA is called CVV2, and AE American Express is called CSC2. The principle of generating the verification code corresponding to its name is the same, but the names of different institutions are different.

Check CVV/CVC for online transactions (swiping cards) and CVV2/CVC2 for off-site transactions/manual transactions (swiping cards is not allowed).

References:

Baidu Encyclopedia-cvv Code