Title:
IDENTITY INFORMATION DE-IDENTIFICATION DEVICE
Document Type and Number:
WIPO Patent Application WO/2011/145401
Kind Code:
A1
Abstract:
A de-identification device is provided for automatically configuring a general hierarchy tree of attribute values in protection technology of identity information. In addition, the provided de-identification device quantitively evaluates the amount of information which is lost when generalizing an attribute value, and can thereby automatically assess priorities between de-identified data and between data that is being de-identified. Information of each person includes attribute values of the person for a plurality of attributes. De-identification is achieved by obfuscating the attribute values, and a structure in which attribute values to be obfuscated are expressed in a tree structure according to the level of obfuscation is called a general hierarchy tree. The disclosed identity information de-identification device achieves automatic configuration by configuring a tree using frequency information of attribute values. In addition, by defining a lost information amount metric means, using the general hierarchy tree, information amount loss between two de-identified data or between data being de-identified is quantitively assessed.
Inventors:
HARADA KUNIHIKO (JP)
TOGASHI YUMIKO (JP)
SATO YOSHINORI (JP)
TOGASHI YUMIKO (JP)
SATO YOSHINORI (JP)
Application Number:
PCT/JP2011/058590
Publication Date:
November 24, 2011
Filing Date:
April 05, 2011
Export Citation:
Assignee:
HITACHI LTD (JP)
HARADA KUNIHIKO (JP)
TOGASHI YUMIKO (JP)
SATO YOSHINORI (JP)
HARADA KUNIHIKO (JP)
TOGASHI YUMIKO (JP)
SATO YOSHINORI (JP)
International Classes:
G06F21/62; H04L9/32
Foreign References:
| JP2008217425A | 2008-09-18 | |||
| JP2007172404A | 2007-07-05 | |||
| JP2002092367A | 2002-03-29 |
Other References:
K. LEFEVRE; D. J. DEWITT; R. RAMAKRISHNAN: "Incognito: Efficient Full-Domain K-Anonymity", 2005 ACM SIGMOD INTERNATIONAL CONF. MANAGEMENT OF DATA, 2005, pages 49 - 60, XP002734215
D. E. KNUTH: "The Art of Computer Programming: Volume 3 Sorting and Searching", vol. 3, 1973, ADDISON-WESLEY, pages: 439 - 444
T. S. HAN; K. KOBAYASHI: "Mathematics of Information and Coding", AMERICAN MATHEMATICAL SOCIETY, 2002, pages 99 - 105
T. S. HAN; K. KOBAYASHI: "Mathematics of Information and Coding", AMERICAN MATHEMATICAL SOCIETY, 2002, pages 95 - 96
D. E. KNUTH: "The Art of Computer Programming: Volume 3 Sorting and Searching", vol. 3, 1973, ADDISON-WESLEY, pages: 439 - 444
T. S. HAN; K. KOBAYASHI: "Mathematics of Information and Coding", AMERICAN MATHEMATICAL SOCIETY, 2002, pages 99 - 105
T. S. HAN; K. KOBAYASHI: "Mathematics of Information and Coding", AMERICAN MATHEMATICAL SOCIETY, 2002, pages 95 - 96
Attorney, Agent or Firm:
POLAIRE I. P. C. (JP)
Polaire Intellectual Property Corporation (JP)
Polaire Intellectual Property Corporation (JP)
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Claims: