RFID blocking wallets, sleeves, and other products offer protection against RFID skimming. The problem isn’t that these products don’t work, it’s that they’re a solution to a problem that Bluetooth credit card skimmers work by capturing the credit card information that is swiped through the skimmer. The skimmer then uses Bluetooth technology to transmit the stolen credit card information to the thief’s computer or smartphone. The thief can then use the stolen credit card information to make fraudulent purchases or withdrawals.
Contactless payment technology is designed to make transactions swift and convenient. You just tap your card or phone to the payment terminal, and you’re done. Turns out, that enjoyable simplicity extends to the people trying to steal data, because thieves need only proximity to swipe information from unsuspecting contactless card carriers.

Here are seven ways criminals can use credit cards skimmers against you: 1. Extending the Card Slot. A skimming attack that works via extending the card slot is a prevalent method used by criminals. By physically attaching skimmers to an ATM, point-of-sale terminal, public ticket kiosk, or gas station pump machine, it extends the card slot

What these two did is called “ATM skimming”—basically placing an electronic device on an ATM that scoops information from a bank card’s magnetic strip whenever a customer uses the machine
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how does a card skimmer work