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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 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 SIM cards.

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