When the card is inserted into a smart card reader, it makes contact with electrical connectors that transfer data to and from the chip. Contactless smart cards Contactless smart cards are passed near an antenna to carry out a transaction. They look just like plastic credit cards, except that they have an electronic microchip and an antenna embedded inside. Contactless cards are the ideal solution when transactions must be processed very quickly, as in mass-transit or toll collection activities. The ISO 7816 standard also defines the physical characteristics of the plastic, including the temperature range and flexibility, position of the electrical contacts and how the microchip communicates with the outside world.
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