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PRIVACY PROTECTION DEVICE, PRIVACY PROTECTION METHOD, AND LIFE LOG MANAGEMENT SYSTEM

  • US 20110231408A1
  • Filed: 03/14/2011
  • Published: 09/22/2011
  • Est. Priority Date: 03/18/2010
  • Status: Active Grant
First Claim
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1. A privacy protection device used in a life log management system that collects and stores user information as a life log, accepts registration of a notification request from a service provider, and notifies the service provider of data relating to a life log of a user satisfying a notification condition of the notification request, the privacy protection device comprising:

  • an attribute update frequency management unit configured to calculate and record therein an update frequency of each attribute included in a life log of a user in response to storing of the life log;

    a static attribute extraction unit configured to calculate a threshold value of a change frequency on the basis of a service available time period of the service provider and the number of users satisfying a preliminarily set limit number of persons, and extract, as a static attribute, an attribute the update frequency of which is less than or equal to the calculated threshold value of the change frequency, the update frequency being recorded by the attribute update frequency management unit; and

    a notification request reception unit configured to extract the number of users satisfying the notification condition of the notification request, with respect to the static attribute extracted by the static attribute extraction unit, and accept the registration of the notification request from the service provider when the extracted number of users exceeds the limited number of persons.

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