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Secure wiegand communications

  • US 8,923,513 B2
  • Filed: 11/29/2012
  • Issued: 12/30/2014
  • Est. Priority Date: 08/11/2008
  • Status: Active Grant
First Claim
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1. A method, comprising:

  • enabling first and second communication devices with first and second PRNGs, respectively, wherein the first and second PRNGs are synchronized and used to secure communications between the first and second communication devices;

    determining that synchronization between the first and second PRNGs has been lost; and

    invoking third and fourth PRNGs at the first and second communication devices respectively, wherein the third and fourth PRNGs are used to resynchronize the first and second PRNGs, wherein the first and second communication devices execute their respective PRNGs in firmware and/or with a microprocessor executing instructions stored in non-transitory computer-readable memory.

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