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DEVICE AND METHOD FOR NEAR FIELD COMMUNICATIONS USING AUDIO TRANSDUCERS

  • US 20100281261A1
  • Filed: 11/13/2008
  • Published: 11/04/2010
  • Est. Priority Date: 11/21/2007
  • Status: Abandoned Application
First Claim
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1. A method for establishing a secure wireless communication link between first and second proximately-located devices, each of which includes respective audio transmitters and audio receivers, the method comprising:

  • using the audio transmitter of the first device to transmit a device-dependent authentication key;

    receiving the transmitted authentication key at the audio receiver of the second device, and using the audio transmitter of the second device to transmit an acknowledgement;

    receiving the acknowledgement at the audio receiver of the first device;

    determining the round-trip time from transmitting the authentication key from the first device to receiving the acknowledgement at the first device; and

    determining whether to establish the secure wireless communication link based on the determined round-trip time.

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