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System and method for privacy management of infinite data streams

  • US 10,366,249 B2
  • Filed: 10/14/2016
  • Issued: 07/30/2019
  • Est. Priority Date: 10/14/2015
  • Status: Active Grant
First Claim
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1. An apparatus for preserving streaming data anonymity, the apparatus comprising:

  • a physical memory configured to store data streams of user data; and

    at least one hardware processor operably connected to the physical memory, the at least one hardware processor configured to;

    continuously collect the data streams of the user data comprising participation data or sensor data from a plurality of user devices;

    convert the user data into a data summary that represents the participation data or the sensor data for a certain time period;

    transform the data summary to a distorted summary based on a difference level for preserving differential privacy of the user data, wherein to transform the data summary, the hardware processor is configured to;

    determine whether the difference level between the data summary and a previous data summary exceeds a difference threshold;

    transform the data summary to the distorted summary by adding a first noise when the difference level exceeds the difference threshold;

    when the difference level does not exceed the difference threshold;

    determine whether a retroactive count of the data summary is greater than a retroactive count threshold,transform the data summary to the distorted summary by adding a second noise when the retroactive count is greater than the retroactive count threshold, andtransform the data summary to the distorted summary by adding a third noise when the retroactive count is not greater than the retroactive count threshold; and

    transmit the distorted summary to a data processing system for statistic based services.

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