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EMV
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==Commands== [[ISO/IEC 7816]]-3 defines the transmission protocol between chip cards and readers. Using this protocol, data is exchanged in ''[[smart card application protocol data unit|application protocol data units]]'' (APDUs). This comprises sending a command to a card, the card processing it, and sending a response. EMV uses the following commands: * application block * application unblock * card block * external authenticate (7816-4) * generate application cryptogram * get data (7816-4) * get processing options * internal authenticate (7816-4) * PIN change / unblock * read record (7816-4) * select (7816-4) * verify (7816-4). Commands followed by "7816-4" are defined in ISO/IEC 7816-4 and are interindustry commands used for many chip card applications such as [[GSM]] [[Subscriber identity module|SIM]] cards.
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