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Systems and methods for cryptographic authentication of contactless cards

  • US 10,965,465 B2
  • Filed: 10/23/2019
  • Issued: 03/30/2021
  • Est. Priority Date: 10/02/2018
  • Status: Active Grant
First Claim
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1. A contactless card comprising:

  • a memory including a counter value, and one or more keys;

    a communication interface; and

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

    update the counter value when the communication interface is within a range of a first active communication field of a first device, the first device including a first application comprising instructions for execution on the first device;

    create a first cryptogram based on the one or more keys and the counter value;

    transmit, to the first application, the first cryptogram via the first active communication field;

    receive, from the first application, a request for data;

    update the counter value when the communication interface is within a range of a second active communication field of a second device, the second device including a second application comprising instructions for execution on the second device;

    create a second cryptogram based on the one or more keys and the counter value; and

    transmit, to the second application, a response responsive to the request for data via the second active communication field, the response comprising the second cryptogram, wherein the second cryptogram authorizes access to the data.

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