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Biometric chain of provenance

  • US 10,055,733 B2
  • Filed: 10/21/2015
  • Issued: 08/21/2018
  • Est. Priority Date: 04/19/2011
  • Status: Active Grant
First Claim
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1. A method for vehicular, indoors or outdoors access control, the method comprising:

  • receiving, via a mobile device, a user credential for use in performing access control;

    communicating a first signal between the mobile device and an audio unit of an access control device, the first signal comprising an audio signal;

    using the audio signal to determine a distance of the mobile device from the audio unit, and to distinguish the mobile device from another mobile device within an operating range of the access control device; and

    using the received user credential or an authentication result from the received user credential to perform the access control, responsive to the determined distance being within a predetermined range and responsive to the determination of the distance being performed within a predetermined time from receiving the user credential.

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