Credit card security code is a security code used for online or telephone transactions with credit cards. 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.

The security code of China UnionPay is called CVN2(CardValidationNumber2), which has three digits, printed on the back of the credit card, after the last four digits of the card number.

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The main purpose of cvv2

Identity cards equivalent to credit cards 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.

The credit card security code, like the CVV code, is the card verification value obtained by the same algorithm, except that when the card is generated, the CVV code is written into the magnetic stripe and the credit card security code is written on the card.

China Minsheng Bank Credit Card Center innovatively launched the first domestic credit card with dynamic CVV2 security code function-Minsheng Core Credit Card. This credit card adopts the world-leading technology and automatically updates the CVV2 security code every 60 minutes, which can effectively resist the risk of frequent credit card theft in recent years and ensure the property safety of the cardholder.

In recent years, online shopping has undoubtedly become an indispensable part of people's lives. It has become a habit to book hotels, air tickets and Haitao shopping online. When people choose a credit card for online payment and settlement, most of them ignore the three-digit CVV2 security code at the end of the signature column on the back of the credit card. CVV2 security code is an extremely important authentication code, comparable to password. Once it is obtained by others, the risk of card being stolen is extremely high.

Baidu encyclopedia-credit card security code

Taiyuan News Network-China's first dynamic CVV2 security code credit card