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A contactless smart card
|“||must only be in near proximity to the reader (generally within 10 centimeters or 3.94 inches) for data exchange to take place. The contactless data exchange takes place over radio frequency (RF) waves. The device that facilitates communication between the card and the reader are RF antennae internal to both the card and the reader.||”|
|“||[is] a credit card or loyalty card that contains an RFID chip to transmit information to a reader without having to be swiped through a reader. Such cards can speed checkout, providing consumers with more convenience.||”|
This implies that it can receive input which is processed and delivered as an output via radio frequencies. There are two broad categories of contactless smart cards. Memory cards contain non-volatile memory storage components, and perhaps some specific security logic. Contrary to popular belief contactless smart cards do not contain an ordinary read-only RFID, but they do contain a rewritable smart card microchip that can be transcribed via radio frequencies.
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