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Systems and methods for cryptographic authentication of contactless cards

  • US 10,505,738 B1
  • Filed: 03/12/2019
  • Issued: 12/10/2019
  • Est. Priority Date: 10/02/2018
  • Status: Active Grant
First Claim
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1. A transmitting device comprising:

  • a memory including a counter value, and a plurality of keys;

    a communication interface; and

    one or more processors in communication with the memory and communication interface,wherein the one or more processors is configured to;

    update the counter value when the communication interface is within a range of a first active communication field of a first receiving device;

    create a first cryptogram based on the plurality of keys and the counter value;

    transmit the first cryptogram, via the first active communication field, to the first receiving device;

    receive, from the first receiving device, an authentication request for sensitive data;

    update the counter value when the communication interface is within a range of a second active communication field of a second receiving device;

    create a second cryptogram based on the plurality of keys and the counter value; and

    transmit an authentication response responsive to the authentication request for sensitive data via the second active communication field, the authentication response comprising the second cryptogram transmitted to the second receiving device, wherein the second cryptogram authorizes access to the sensitive data.

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