Construction Bank reminds: use card security to start from the details

Nowadays, the "cardless transaction" of the credit card (that is, there is no need to have the card swiping behavior on the POS machine) has become more and more popular. The user only needs to input the credit card number, the expiration date, the CVV code and the like, so that the online payment can be completed easily and conveniently. Bankers and third-party payers have said that some of the potential card risks of "cardless transactions" cannot be completely ruled out, but banks and online trading platforms are also constantly introducing various security measures, plus cardholders. Pay attention to protection while trading, credit card "no card payment" will still bring a safe and fast payment experience.

For many credit card holders, even if they have been using card for many years, they still lack a comprehensive understanding of the card, resulting in inadvertently creating a card vulnerability. Therefore, CCB professionals remind cardholders that the use of card security needs to start from the details.

Detail 1: Very important "last three yards". With the development of e-commerce, the use of credit card "offline transactions", also known as "no card payment" or "no card no secret payment" is getting higher and higher. This method only needs to provide the card number, expiration date and "last three yards" and ID card information to complete the transaction, which is common when the cardholder is booking a hotel, ticket, or online shopping. The so-called "last three yards" is the last three digits on the back of the credit card. This code is generated by the issuing rules and encryption algorithm of the issuing bank. In the payment process, if the merchant provides the "last three yards" to the bank, the bank will default to the merchant to obtain the cardholder authorization, thereby allowing the transaction. The last three codes are extremely critical in offline transactions, and the importance is even as good as the bank card password, which can be regarded as the "second password." In addition to guaranteeing offline payments, the “last three yards” also have a very important role in preventing their cards from being cloned. If the criminals obtain the credit card account information and copy the card, but do not copy the "last three code" information, even if the password is known, the withdrawal will be rejected by the ATM.

Detail 2: Pay attention to your "pre-authorization". Many cardholders will have this experience. If you choose to use a credit card to guarantee the transaction method when you stay at the hotel, you must first refresh the card to freeze some funds, and then check it out at the check-out to make the actual payment. Then the previous action of swiping is equivalent to providing a "pre-authorization". Credit card pre-authorization is currently widely used to book airline tickets, hotels, etc. For example, many domestic airlines and booking websites do not need to enter a password for credit card payment. Just provide the website with the card number, expiration date, verification code, etc. Authorized payment. The so-called pre-authorization refers to the transaction in which the card issuer or its agent confirms the license freeze amount before the cardholder pays. In other words, it is the transaction carried out by the cardholder when the cardholder consumes, because the amount of consumption is not fixed and the bank is required to make a future payment to the merchant. The amount of the pre-authorized transaction will be frozen and no further transactions will be allowed until the settlement of the corresponding transaction occurs. It should be noted that once the pre-authorization occurs, the funding freeze time is more than one month. Therefore, the cardholder either asks the merchant to cancel the pre-authorization when the transaction occurs, or pays with the same credit card, otherwise the funds may be swept away again within the time when the pre-authorization is still in effect. At the same time, the cardholder also needs to pay attention to check the statement in time to eliminate the repeated deduction.