cvv2 is located in the 4 digits after the card number on the signature column on the back of the credit card. The credit card security code is 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, you can complete the transaction. In China, there are also merchants who sign contracts with banks, but you don't need a credit card password, and you can complete the telephone transfer only with the security code.

I. the difference between credit card security code and CCV2

like CVV code, credit card security code is the card verification value obtained by the same algorithm, except that when the card is generated, the CVV code is written in the magnetic stripe, while the credit card security code is written on the card. CVV codes are checked during online transactions, while credit card security codes are more checked during off-site transactions or transactions without cards. Cvv2, the credit card security code, is a security code for credit cards when conducting online or telephone transactions. It is a 3-or 4-digit number printed on credit cards. Different types of cards have different printing positions. It is usually used to prove that the payer owns the credit card at the time of transaction, thus preventing credit card fraud.

second, the function of cvv2 code

cvv2 can prove that the payer uses the credit card when making payment, and can avoid the credit card being defrauded. Moreover, the ccv2 code of the credit card is equivalent to the credit card password, and the cardholder of the credit card can use this code to spend by swiping the card. In addition, in some foreign websites, the transaction can be completed only by providing the account number and cvv2 code, and the credit cards of many banks in China are also the same, and payment can be completed only by using the security code. Although this ccv2 code is very convenient for payment, it also increases the risk of credit card consumption. Moreover, in recent years, there are scams that ask cardholders to provide cvv2 code to help increase the limit. In the name of bank staff, such scams will ask cardholders to provide the card number, expiration date and security code of the credit card, and will make them deposit the fee activation card. If the cardholder is too troublesome to mention the amount at this time, the so-called customer service staff will ask the cardholder to send him the verification code for withdrawing the amount, so that the credit card will be issued.

when choosing a credit card for online payment and settlement, people mostly ignore the 3-digit CVV2 security code on the back of the credit card. CVV2 security code is an extremely important identity authentication code, which is comparable to password. Once it is obtained by others, the risk of card being stolen is extremely high.

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