Privacy protection device, privacy protection method, and life log management system

• US 8,645,392 B2
• Filed: 03/14/2011
• Issued: 02/04/2014
• Est. Priority Date: 03/18/2010
• Status: Active Grant

• Current Assignee: Fujitsu Limited
• Original Assignee: Fujitsu Limited
• Inventors: Sasaki, Kazuo, Fukuta, Shigeki
• Primary Examiner(s): Breene, John E
• Assistant Examiner(s): LODHI, ANDALIB FT
• Application Number:
  US13/047,394
• Publication Number:
  US 20110231408A1
• Time in Patent Office: 1,058 Days
• Field of Search: 707/727, 707/748, 707/758
• US Class Current: 707/748
• CPC Class Codes: G06F 21/6245 Protecting personal data, e.g. for financial or medical purposes
• CPC Class Codes: G06F 2221/2101 Auditing as a secondary aspect
• CPC Class Codes: H04L 63/104 Grouping of entities

Abstract

A privacy protection device includes 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 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, accept the registration of the notification request from the service provider when the extracted number of users exceeds the limit number of persons.

Claims

1. A privacy protection device comprising:

a memory; and

a processor coupled to the memory, the processor 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,

calculate a threshold value of a change frequency on the basis of a service available time period of a service provider and a number of users satisfying a set number of persons,

extract an attribute of the recorded update frequency of which is less than or equal to the calculated threshold value of the change frequency,

extract a number of users satisfying a notification condition of a notification request, with respect to the extracted attribute, and

accept registration of the notification request from the service provider when the extracted number of users exceeds the set number of persons.

2. The privacy protection device according to claim 1, wherein the processor is further configured to:

determine whether or not an added life log of a user satisfies the notification condition of the notification request the registration of which is accepted when the life log of the user is newly added, extract another user satisfying the notification condition when the added life log of the user satisfies the notification condition, and put on hold the notification of data relating to the life log satisfying the notification condition to the service provider when the number of extracted users does not reach the limit number of persons.

3. The privacy protection device according to claim 1, wherein the processor is further configured to:

determine whether or not an added life log of a user satisfies the notification condition of the notification request the registration of which is accepted when the life log of the user is newly added, extract another user satisfying the notification condition when the added life log of the user satisfies the notification condition, and notify the service provider of data relating to the life log satisfying the notification condition when the number of extracted users reaches the limit number of persons.

4. The privacy protection device according to claim 1, wherein the processor is further configured to:

maintain a registration history of a past notification request of the service provider; and

extract a registration history of a past notification request of a service provider from the notification request registration history database, with respect to the corresponding service provider that newly registers a notification request, and calculate a service available time period of the corresponding service provider by calculating an average duration time of the registration of the corresponding notification request.

5. A life log management system comprising:

a memory; and

a processor coupled to the memory, the processor 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,

calculate a threshold value of a change frequency on the basis of a service available time period of a service provider and a number of users satisfying a set number of persons,

extract an attribute of the recorded update frequency of which is less than or equal to the calculated threshold value of the change frequency,

extract a number of users satisfying a notification condition of a notification request, with respect to the extracted attribute,

accept registration of the notification request from the service provider when the extracted number of users exceeds the set number of persons; and

determine whether or not an added life log of a user satisfies the notification condition of the notification request the registration of which is accepted when the life log of the user is newly added, extract another user satisfying the notification condition of the notification request when the added life log of the user satisfies the notification condition, and notify the service provider of data relating to the life log satisfying the notification condition when the number of extracted users reaches the set number of persons.

6. A privacy protection method comprising:

calculating and recording, by a processor, an update frequency of each attribute included in a life log of a user in response to storing of the life log;

calculating, by a processor, a threshold value of a change frequency on the basis of a service available time period of a service provider and a number of users satisfying a set notification condition;

extracting, by a processor, an attribute of the update frequency of which is less than or equal to the calculated threshold value of the change frequency; and

extracting, by a processor, a number of users satisfying a notification condition of the notification request, with respect to the extracted attribute; and

accepting, by a processor, registration of the notification request from the service provider when it is determined that the extracted number of users exceeds the set number of persons.

7. A non-transitory computer-readable storage medium including a program for causing a computer including a processor and a memory to execute a privacy protection method, the method comprising:

calculating and recording therein an update frequency of each attribute included in a life log of a user in response to storing of the life log;

calculating a threshold value of a change frequency on the basis of a service available time period of a service provider and a number of users satisfying a set notification condition;

extracting an attribute of the update frequency of which is less than or equal to the calculated threshold value of the change frequency;

extracting a number of users satisfying a notification condition of the notification request, with respect to the extracted attribute; and

accepting registration of the notification request from the service provider when it is determined that the extracted number of users exceeds the set number of persons.