Credit card security code is the security code of credit card for online or telephone transactions. Generally, it is a 3-digit or 4-digit number printed on a credit card, and the printing position of different types of cards will be different. It is usually used to prove that the payer has a credit card at the time of transaction, thus preventing credit card fraud.

CVV password verification means that commercial banks add the verification code of self-defined algorithm to the bank card number coding rules and magnetic stripe data format they use, and the related bank cards are also called CVN bank cards.

CVV information is stored in the track of magnetic stripe bank card. According to the information such as card number, track main account number and logo code of issuing bank, it is encrypted by special encryption algorithm defined by each bank, and every step is encrypted by CVKA technology to get verification code.

Extended data:

The credit card security code is actually equivalent to the credit card ID card, and we can use this code for consumer transactions. You don't need a password to shop on overseas websites. As long as the buyer provides the account number and security code, the transaction can be completed, and there are also merchants and banks signing contracts in China.

You don't need a credit card password, you only need a security code to complete the telephone transfer. Therefore, everyone must take good care of their credit cards, and don't let them leave their sight when spending, so as to avoid others remembering your credit card account number and security code.

The main function of credit card security code is equivalent to credit card ID card. When we swipe our card, we can directly use the security code for consumer transactions, especially when shopping on overseas websites. We don't need to use a credit card password, we just need the buyer to provide the account number and credit card security code to complete the transaction.

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