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:
Oct. 31, 2023
Filed:
Mar. 23, 2021
Hitachi, Ltd., Tokyo, JP;
Masayuki Yoshino, Tokyo, JP;
Keisei Fujiwara, Tokyo, JP;
HITACHI, LTD., Tokyo, JP;
Abstract
A retrieval system includes a first management unit which stores, in a first storage area that cannot be browsed by an administrator of a provider machine, management information in which an encrypted retrieval keyword used for a retrieval performed by the provider machine, and an encrypted ID, which is associated with the encrypted retrieval keyword, are associated and, of the management information, decrypts, and then once again encrypts, the encrypted retrieval keyword corresponding to the encrypted query from a browsing machine and the encrypted ID corresponding to the encrypted retrieval keyword, and a second management unit which stores, in a second storage area, index information in which the encrypted retrieval keyword used for the retrieval performed by the provider machine, and one or more encrypted IDs associated with the encrypted retrieval keyword, are associated, and, of the index information, updates the encrypted retrieval keyword and the encrypted ID.