1. CVV, namely Card Verification Value, CVV password verification means that the bank adds a verification code of a custom encryption algorithm to the bank card number encoding rules and magnetic stripe data format it uses.
2. The CVV code is equivalent to the ID card of a credit card and is mainly used to confirm transactions. After getting the credit card, the security code will be used for key operations such as card activation and activation. In addition, when making transactions on some websites or over the phone, the account number, validity period and security code can be provided to complete the transaction without providing a password, so the CVV code is as important as the credit card password.
3. Both are 3-digit or 4-digit numbers generated by the card number, validity period and service restriction code. They are generally unloaded into the 2-track user-defined data area of ??the card's magnetic stripe. The generation methods of CVV ??and CVC are the same, but they are called differently.
4. Password-less transactions are also called "offline payments". This payment method only requires the credit card number, expiration date and CVV code to complete the transaction. Once the information is stolen, it can be used for online shopping, telephone ordering, etc. .
5. The existence of the CVV code is directly linked to the authenticity of the credit card. It is best not to scratch it off. To prevent leakage, Xiao5 recommends that cardholders cover the CVV code with an easily peelable sticker.
Extended information
1. Do not disclose password, card number, expiration date, security code, and SMS verification code.
2. Do not write credit card information into the computer.
3. Don’t hand your credit card to others easily, and keep the card out of your sight when making purchases.
4. After the card is lost, you should immediately call the bank’s customer service number to report the loss.
5. Confirm your credit card bill in a timely manner and understand your consumption situation. If you find any abnormal consumption, provide evidence to the bank to refuse payment.
Reference materials
Baidu Encyclopedia-CVC code