1. Passwords are not the only way to use credit card transactions. According to the traditional concept, as long as you keep your password well and prevent it from being stolen, it is basically safe. But if this were true, there would not be so many personal credit cards. security issues occurred. However, this is not necessarily the case with credit cards. When swiping a card on the Internet, you do not need a password. You only need to enter the credit card number, bank mobile phone number, CCV code, and SMS verification code to complete the transaction.
1. The CCV code is very important. Where is the CCV code? You can see it by turning the credit card over. This is actually the security transaction code of your credit card, and the so-called password is actually only useful for domestic consumption. If someone holds the last three digits of your credit card and logs in to the domestic website to make purchases, they can easily complete the transaction by directly entering the last three digits. So don't expose this information to others easily. Some people use a razor blade to delete the last three digits from the moment they get a credit card, but you should remember it yourself, it will be useful when making purchases. In this way, there is no fear of leakage. Special reminder: Some merchants will also sell the cardholder’s credit card information, because the complete information of the cardholder and the validity period will be left on the shopping list, which naturally also includes the card number. After selling this information, it will inevitably be given to the cardholder. bring a certain crisis. At the same time, it is also something that some cashiers do. When they swipe a consumer's card, they directly tap the last three digits a few times, and then use the shopping list to directly swipe the card to make purchases online.