In real life, credit card theft incidents are common. Let me ask: Do you really understand credit cards? Maybe the credit card is in your hand, no one knows your password, and it can easily be stolen. In order to avoid the security risks of such credit cards, you must know what the security code of your credit card is.

Credit card security code is a security code for credit card phone or online transactions. It is equivalent to the ID card of a credit card. You can use this security code for transactions and consumption. It usually consists of three to four digits and is derived from the account number. , validity period and service code are extracted and generated through a series of encryptions. Once generated, only the card-issuing bank and the cardholder know it, so we should be careful to prevent others from snooping on the security code when transacting with a credit card.

The credit card security code is a set of 3 or 4 digits on the credit card. The generation method is that the bank extracts the card account number, validity period, and service code, arranges them, and then calculates them through a series of complex algorithms. After this set of numbers is generated, only the issuing bank and the bank card holder know what the number is.

The credit card security code is equivalent to the credit card’s ID card. We can use this code to conduct consumer transactions. Shopping on overseas websites does not require a password. As long as the buyer provides an account number and security code, the transaction can be completed. In China, there are also merchants that have signed contracts with banks to complete phone transfers without a credit card password and only with a security code. Therefore, everyone must take good care of their credit cards and keep them out of their sight when making purchases to avoid others remembering your credit card account number and security code.