RFID-enabled credit cards can wirelessly transmit personal information from a card held a few inches away from a RFID reader to complete a financial transaction.
There are many ways to pay for something wirelessly, for example, Apple Pay, which uses Near Field Communications (NFC). Though RFID is especially subject to hacking because the transmission protocol is not encrypted and, at least, in the first generation of RFID-enabled credit cards, it would transmit the financial information in clear-text to the theif.
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