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

  • US 9,330,386 B2
  • Filed: 05/15/2014
  • Issued: 05/03/2016
  • Est. Priority Date: 09/28/2005
  • Status: Active Grant
First Claim
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1. A non-transitory computer readable medium embodying information indicative of instructions for causing a reader to perform operations comprising:

  • wirelessly sending from a reader to a contactless payment device in a command message a terminal unpredictable number and a transaction amount;

    receiving from the contactless payment device 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, and a card unpredictable number, the dynamic signature sent with an application file locator (AFL); and

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

    receiving from the contactless payment device the requested one or more records requested by the read record command message; and

    causing a recalculation of the dynamic signature in order to authorize a contactless transaction if the dynamic signature received from the contactless payment device matches the recalculated dynamic signature.

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