The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 16, 2016
Filed:
Feb. 20, 2012
Takashi Ito, Tokyo, JP;
Mitsuhiro Hattori, Tokyo, JP;
Nori Matsuda, Tokyo, JP;
Kazuo Ota, Tokyo, JP;
Yusuke Sakai, Tokyo, JP;
Takashi Ito, Tokyo, JP;
Mitsuhiro Hattori, Tokyo, JP;
Nori Matsuda, Tokyo, JP;
Kazuo Ota, Tokyo, JP;
Yusuke Sakai, Tokyo, JP;
Mitsubishi Electric Corporation, Tokyo, JP;
The University of Electro-Communications, Tokyo, JP;
Abstract
A searchable encryption resistant to frequency analysis. A conversion rule management device generates a conversion rule table associating a search keyword with a conversion keyword group. Based on the conversion rule table, a data registration device generates registration data associating encrypted data with an encrypted keyword, and registers the registration data in a server device. An information processing device obtains from the conversion rule table a conversion keyword group associated with a specified search keyword, generates an encrypted keyword group, and requests a data search by specifying the encrypted keyword group. Using as a search key an encrypted keyword included in the encrypted keyword group, the server device searches for encrypted data associated with the search key, and returns searched encrypted data. The information processing device decrypts the searched encrypted data, and outputs as a search result search data obtained by decryption.