Title:
SEARCH SYSTEM, SEARCH METHOD FOR SEARCH SYSTEM, INFORMATION PROCESSING DEVICE, SEARCH PROGRAM, CORRESPONDING KEYWORD MANAGEMENT DEVICE AND CORRESPONDING KEYWORD MANAGEMENT SYSTEM
Document Type and Number:
WIPO Patent Application WO/2012/115031
Kind Code:
A1
Abstract:
This invention realizes anonymous searching resistant to frequency analysis. (1) A conversion rule management device (400) generates a conversion rule table associating search keywords with conversion keyword groups. (2) A data registration device (500) generates, on the basis of the conversion rule table, registration data associating encrypted data and encrypted keywords and registers the registration data in a server device (300). (3) An information processing device (200) acquires from the conversion rule table the conversion keyword group corresponding to an indicated search keyword, generates an encrypted keyword group, and requests a data search by indicating the encrypted keyword group. (4) With the encrypted keyword contained in the encrypted keyword group as the search key, the server device (300) searches for the encrypted data corresponding to the search key, and responds with the encrypted data found in the search. (5) The information processing device (200) decodes the encrypted data found in the search and outputs as the search results the search data obtained by said decoding.
Inventors:
ITO TAKASHI (JP)
HATTORI MITSUHIRO (JP)
MATSUDA NORI (JP)
OTA KAZUO (JP)
SAKAI YUSUKE (JP)
HATTORI MITSUHIRO (JP)
MATSUDA NORI (JP)
OTA KAZUO (JP)
SAKAI YUSUKE (JP)
Application Number:
PCT/JP2012/053948
Publication Date:
August 30, 2012
Filing Date:
February 20, 2012
Export Citation:
Assignee:
MITSUBISHI ELECTRIC CORP (JP)
UNIV ELECTRO COMMUNICATIONS (JP)
ITO TAKASHI (JP)
HATTORI MITSUHIRO (JP)
MATSUDA NORI (JP)
OTA KAZUO (JP)
SAKAI YUSUKE (JP)
UNIV ELECTRO COMMUNICATIONS (JP)
ITO TAKASHI (JP)
HATTORI MITSUHIRO (JP)
MATSUDA NORI (JP)
OTA KAZUO (JP)
SAKAI YUSUKE (JP)
International Classes:
G09C1/00; G06F17/30; G06F21/60; G06F21/62
Foreign References:
| JP2011018976A | 2011-01-27 | |||
| JP2005072917A | 2005-03-17 | |||
| JP2001507837A | 2001-06-12 | |||
| JP2005072917A | 2005-03-17 |
Other References:
TAKASHI ITO ET AL.: "Efficient Searchable Encryption Schemes Against Frequency Analysis", IEICE TECHNICAL REPORT 0913-5685, vol. 110, no. 443, 24 February 2011 (2011-02-24), pages 1 - 6, XP008170511
See also references of EP 2680251A4
See also references of EP 2680251A4
Attorney, Agent or Firm:
MIZOI, Shoji (JP)
Shoji Mizoi (JP)
Shoji Mizoi (JP)
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Claims: