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:
Sep. 29, 2020
Filed:
Mar. 28, 2016
Hitachi, Ltd., Chiyoda-ku, Tokyo, JP;
Keisei Fujiwara, Tokyo, JP;
Yumiko Yokohari, Tokyo, JP;
Takayuki Suzuki, Tokyo, JP;
Yoshinori Sato, Tokyo, JP;
Masayuki Yoshino, Tokyo, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A database system including: a database server for storing registration information including encrypted data encrypted using a probabilistic encryption method; and a terminal. The terminal includes: an encryption unit; a decryption unit; an encrypted search query generating unit for generating an encrypted search query obtained by encrypting a search query used for retrieving the encrypted data; and an additional processing unit for encrypting a search condition of a plaintext and transmitting a data acquisition request including the encrypted search condition. The database server holds database operation command definition information and search additional information. The database server includes: a database operation command generating unit for generating a database operation command by converting the data acquisition request on the basis of the database operation command definition information; and a database control unit for acquiring encrypted data satisfying the search condition by using the database operation command and the search additional information.