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Device, system and method for reducing an interaction time for a contactless transaction

  • US 8,770,476 B2
  • Filed: 07/06/2010
  • Issued: 07/08/2014
  • Est. Priority Date: 09/28/2005
  • Status: Active Grant
First Claim
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1. A reader comprising:

  • a contactless interface;

    a transaction module coupled to the contactless interface, wherein the transaction module is configured to minimize an interaction time under 500 milliseconds for a contactless transaction between the reader and a card by;

    wirelessly sending from the reader to a card in a command message a terminal unpredictable number, transaction amount, and transaction currency;

    receiving from the card in response to the command message a wireless message with a dynamic signature generated based on an application transaction counter (ATC), the terminal unpredictable number, the transaction amount, the transaction currency, and a card unpredictable number, the dynamic signature sent with an application file locator (AFL); and

    thenwirelessly transmitting from the reader to the card a read record command message to request one or more records indicated in the AFL from the card; and

    receiving from the card the requested one or more records requested by the read record command; and

    a security module, coupled to the transaction module, configured for;

    recalculating the dynamic signature; and

    authorizing the contactless transaction if the dynamic signature received from card is validated.

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