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. 30, 2022
Filed:
Sep. 23, 2020
Mitsubishi Electric Corporation, Tokyo, JP;
Kenichiro Hayasaka, Tokyo, JP;
Yutaka Kawai, Tokyo, JP;
MITSUBISHI ELECTRIC CORPORATION, Tokyo, JP;
Abstract
Provided is a secret search device including an arithmetic processing unit configured to speed up secret search processing by, when the secret search processing is performed by executing a pairing operation relating to each element of an encrypted tag and each element of a trapdoor, and when the pairing operation is executed by using a pre-calculation table stored in a storage unit for each element to be used in the pairing operation. The arithmetic processing unit is configured to execute, based on information on a free space usable for the pre-calculation table, size adjustment of the pre-calculation table such that the pre-calculation table fits in the free space.