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Signal fingerprinting for authentication of communicating devices

  • US 10,582,384 B2
  • Filed: 01/12/2018
  • Issued: 03/03/2020
  • Est. Priority Date: 06/09/2015
  • Status: Active Grant
First Claim
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1. A method comprising:

  • receiving, by a waveguide system, electromagnetic waves at a physical interface of a transmission medium that propagate along the transmission medium without requiring an electrical return path, wherein the electromagnetic waves are guided by the transmission medium, and wherein the electromagnetic waves have a non-optical frequency range;

    determining, by the waveguide system, whether the electromagnetic waves are being received from a second network device according to a comparison of a fingerprint of the electromagnetic waves and an expected fingerprint of expected parameters for the electromagnetic waves transmitted by the second network device; and

    determining, by the waveguide system, whether the electromagnetic waves are being received over a path that includes a group of third network devices according to the fingerprint of the electromagnetic waves and according to a group of expected fingerprints of expected parameters for other electromagnetic waves transmitted by the group of third network devices.

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