The development of the credit card business can almost be said to be close to saturation, and its business development is becoming more and more perfect. Usually, there is a 7-digit number on the back of every credit card. The first 4 digits are the last 4 digits of the card number, and the last 3 digits are called cvv2, cvc2, cid, cvn2, etc. So, what is the credit card cvv2 code?

Cvv2, cvc2, cid, cvn2, etc. are collectively called cardsecurity code, which is the credit card security number. The credit card cvv2 code is a number printed in the signature area of ??the Visa/MasterCard card, which can be viewed The ID number for the credit card. Different card issuers have different names. The following uses the CVV2 code of Visa. When the cardholder uses a credit card for special transactions such as TV shopping, telephone shopping, online shopping, offline order pressing transactions, etc., it is used to verify the cardholder's identity.

The security code cvv2 is extracted by the bank from the account number, credit card validity period, and credit card service code, and is calculated through a series of complex algorithms. After this set of numbers is generated, only the issuing bank and the bank card holder know what the number is. Therefore, this number is very important to the credit card holder.

In general, the security code of a credit card is unique. If the credit card expires, the security code will change after changing the credit card. Even if the credit card number does not change, the security code needs to be changed. , so cardholders should ensure that the card does not leave their sight when using their credit card.