Credit card CVV, which stands for CardVerificationValue, is an important security measure used to verify the identity of the cardholder and prevent fraud. It is usually a three or four-digit number, called CVV2 on VISA cards and CVC2 on MasterCard. These numbers are located in the magnetic stripe or 2-track user-defined data area of ??the card. For Visa/MasterCard, they are usually visible in the last three or four digits of the signature area, but this is not the password area.

The main function of CVV ??is that in non-face-to-face transactions, such as online shopping or payment over the phone, in addition to the card number and expiration date, you also need to enter this security code to confirm that the transaction comes from the cardholder himself. This effectively prevents unauthorized transactions as it ensures the card remains under the cardholder's control. Therefore, when using your credit card on a daily basis, be sure to protect the CVV code and do not disclose it to others easily.

The generation principles of CVV ??and CVC2 are similar. They are both based on the card number, validity period and service constraint code. They are as important as the credit card password, so when it comes to key operations of account security, such as activating the card Or making large transactions, CVV protection is crucial. Remember, protecting your CVV is protecting your credit card security.