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Identifying proximity history of computer devices

  • US 9,867,011 B2
  • Filed: 03/05/2015
  • Issued: 01/09/2018
  • Est. Priority Date: 03/06/2014
  • Status: Active Grant
First Claim
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1. A method comprising:

  • receiving a request from an origin device to identify a proximity history of the origin device with one or more target devices;

    retrieving first context information from the origin device and second context information from each of the one or more target devices;

    comparing, by a processing device, a first timestamp of the first context information to a second timestamp of the second context information;

    identifying, by the processing device, the second context information from the one or more target devices for which the second timestamp is within a time threshold of the first timestamp, to generate identified context information;

    generating, by the processing device, a list of a subset of the one or more target devices that satisfy a proximity threshold with respect to the origin device based on comparing the first context information with the identified context information;

    generating, by the processing device, an ordered list of events, wherein each event indicates a time interval during which a target device of the subset satisfies the time threshold and the proximity threshold with respect to the origin device; and

    providing the ordered list of events to the origin device to estimate a time-based proximity history between the one or more target devices and the origin device.

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