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:
Mar. 17, 2020
Filed:
Aug. 04, 2017
Kabushikikaisha Rnai, Tokyo, JP;
Tomoyuki Yamada, Tokyo, JP;
Masahiro Hattori, Tokyo, JP;
KABUSHIKIKAISHA RNAi, Tokyo, JP;
Abstract
A database server stores encrypted vector data in which each of a plurality of elements is encrypted by encryption maintaining semi-homomorphism between calculation before encryption and calculation after encryption. The database server receives an obfuscated query (N-randomized query) from a terminal device, performs calculation for each of a plurality of segments of vectors of the obfuscated query with a segment of the encrypted vector data, and transmits the calculation to the terminal device in reply. The terminal device may acquire a result of decryption calculation transmitted in reply by a decryption device.