Then, your card or mobile payment app can send that temporary token safely, rather than transmit your actual card number, name, and other sensitive information. Tokenization is when your card's information is used to generate a random, temporary token for each transaction. Whether you use your contactless card or a mobile payment app, every payment you make involves tokenization for extra security. Instead, your phone can act as a virtual NFC tag for your credit or debit card, even if said card doesn't have an actual NFC tag inside it. This chip, paired with a mobile payment app like Google Pay, Apple Pay, and Samsung Pay, means that you might not even need to take your wallet out anymore. Most modern phones include an NFC chip, which can act as both an NFC reader/writer and tag. Many newer credit and debit cards include an NFC tag, so you can just hold your card just above a payment terminal rather than swipe or insert it.Ĭontactless payment enabled credit and debit cards have a symbol on them similar to these: Most contactless payment cards will have a similar symbol on the front or back – Source These days, the most common thing that NFC is used for is contactless payment. There are a lot of use cases for NFC, but here are some of the most common you'll see. Meanwhile, RFID works from a distance of up to 12 m/40 ft. NFC's higher frequency means that, while it can transfer data much faster than RFID, it only works from a distance of about 4 cm/1.6 in or less. NFC is a newer, high-frequency version of RFID, and also involves both tags and readers. In this case, when the reader receives a signal back from the tag on your item, it sounds an alarm. That electricity activates the chip inside the tag, and it sends a signal with the information stored on the chip back to the reader. Most RFID tags are unpowered, so when the antenna in the tag picks up radio waves from the reader, it generates a small amount of electricity. So what happens if you try to leave a store and there's still a tag on the item you bought? They're constantly transmitting radio waves and listening for a response. If you've ever seen those big devices on either side of a store entrance, those are just big RFID readers. Highway toll payment devices and those plastic things on clothes and other expensive items in stores are some common examples of RFID tags. These tags all include an antenna and a tiny chip, and can come in many shapes and sizes. Radio-frequency identification, or RFID, is a generic term for technologies that use radio waves from a reader to track specific tags. NFC is a subset of another technology called RFID, so let's dig a bit into that before circling back to NFC. It is a standard for devices to communicate with each other wirelessly from a very close distance. In this article we'll go over what NFC is, what it's used for, some creative ways to use NFC, and more. While the use of NFC for things like contactless payments was growing steadily, it exploded early this year due to the Coronavirus pandemic. You've probably seen it in your phone settings, or heard about it online.
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