Revealing CVV code on credit card, card holder is in danger of being hacked

A negligent habit with information on credit cards has made many people “cry badly” when hacked by hackers. Notably, in the contract signed with the bank when issuing the card is always set the sentence “If due to the subjective error of the customer (to disclose information, lose the card), the bank or card issuer is not responsible “.

Card payment has many advantages such as fast, convenient and convenient, but not everyone knows how to use a secure card.

May 5.2018, Ms. HM (Hai Ba Trung District, Hanoi) was startled when the constant messages about mobile reported that 5 transactions in MasterCard card payment took place in about 5 minutes from 8h48 ‘to 8h53’. The contents of transactions are buying train tickets in the UK and shopping at a number of foreign websites. It is worth mentioning that at that time, HM’s MasterCard was still in her purse and she did not perform any of the above transactions.

Mr. K (Hanoi), owns a credit card of a BIG 4 bank with a limit of up to VND 500 million. Because I want to create a luxurious image with my partner, my girlfriend … Mr. M never steps into a payment booth but is often “impartial” to give credit cards to restaurant staff.

Many customers like Mr. H gave credit cards to supermarket staff, restaurants, grocery stores … swiped in part due to the psychological concern and fear of ‘home’ so when the staff requested it was immediately given the card .

The number of CVV ​​stands for Card Verification Value is a code used to verify Visa cards including debit and credit cards. Likewise, CVC code stands for Card Verification Code used to verify Mastercard. Visa photos

And this makes customers’ credit cards easily copied by bad guys. The feature of payment card is that all information will be displayed on the card’s face such as cardholder’s name, card number, expiration date, CVV / CVC number (verification code) … When recording this information, the person Time can hack money through payment, online purchase.

Even for some websites buying online goods, booking hotels or buying air tickets, customers do not need to enter PIN code and OTP code, just enter 4 information as credit card number, expiration date card, name of cardholder and CVV code.

Therefore, if customers reveal credit card numbers and CVV / CVC codes, the risk of card information theft and fraudulent transactions is huge.

The bank experts recommend that when paying at the store, the cardholder should ask the restaurant, supermarket, hotel staff … to bring the POS to the transaction at the table and directly swipe the card. Before swiping the card, customers need to carefully observe the strange signs on the POS in case it is attached to a card stealing device.

7 security principles that customers need to master

1. Keep your electronic banking and card information confidential. Do not provide electronic banking information (username / access password / username / OTP code) and card (card number / PIN / expiration date / CVV code / CVC code) to anyone.

2. Authenticate the offeror to avoid fraudulent fraudulent identity of the acquaintance.

3. Only execute transactions on reputable websites.

4. Always download and update the latest security and antivirus software.

5. Log out of your account after completing the transaction.

6. Cover the PIN code keypad when performing swipe card transactions. Check the location of card reader slots, keyboards, cameras before trading at ATM to prevent information theft devices.

7. Actively lock / open electronic wallet to control online financial transactions.