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. 26, 2025
Filed:
Aug. 14, 2019
Nippon Telegraph and Telephone Corporation, Tokyo, JP;
NIPPON TELEGRAPH AND TELEPHONE CORPORATION, Tokyo, JP;
Abstract
A calculation of a gradient descent method in secure computing is performed at high speed while maintaining accuracy. A secure gradient descent computation method calculates a gradient descent method while keeping a gradient and a parameter concealed. An initialization unit initializes concealed values [M], [V] of matrices M, V (S). A gradient calculation unit determines concealed value [G] of a matrix G of a gradient g (S). A parameter update unit calculates [M] β1 [M]+(1−β1) [G] (S-), calculates [V]←β2 [V]+(1−β2) [G]◯[G] (S-), calculates [M{circumflex over ( )}]←β{circumflex over ( )}1, t [M] (S-), calculates [V{circumflex over ( )}]←β{circumflex over ( )}2, t [V] (S-), calculates [G{circumflex over ( )}]←Adam ([V{circumflex over ( )}]) (S-), calculates [G{circumflex over ( )}]←[G{circumflex over ( )}]◯[M{circumflex over ( )}] (S-), and calculates [W]←[W]−[G{circumflex over ( )}] (S-).