Contactless smart card
Allowing for contactless payments in credit and debit cards / From Wikipedia, the free encyclopedia
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This article is about smart cards that use radio to transmit data. For smart cards that use electrical connectors, see smart card.
A contactless smart card is a contactless credential whose dimensions are credit card size. Its embedded integrated circuits can store (and sometimes process) data and communicate with a terminal via NFC. Commonplace uses include transit tickets, bank cards and passports.
There are two broad categories of contactless smart cards. Memory cards contain non-volatile memory storage components, and perhaps some specific security logic. Contactless smart cards contain read-only RFID called CSN (Card Serial Number) or UID, and a re-writeable smart card microchip that can be transcribed via radio waves.