Changing the security code and password, CVV password verification means that commercial banks add the verification code of self-defined algorithm to the banking coding rules and magnetic stripe data formats 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 track main account number, issuer identification code and other information.

Encrypted by a special encryption algorithm defined by banks, each step is encrypted by CVKA technology, and the verification code is obtained. Because the encryption algorithms of different banks are different, some fake cards illegally made by using the obtained bank card information can be identified and cannot be used when the issuing bank decrypts them.

Extended data

Credit card security code is equivalent to credit card ID card, which can be used 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. In China, there are also merchants signing contracts with banks, but you don't need a credit card password, you only need a security code to complete the telephone transfer.

Be sure to take good care of your credit card, and don't let it leave your sight when you consume it, so as to avoid others remembering the account number and security code of the credit card.