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:
Jan. 06, 2026
Filed:
Oct. 02, 2019
Ntt, Inc., Tokyo, JP;
Ibuki Mishina, Musashino, JP;
Dai Ikarashi, Musashino, JP;
Koki Hamada, Musashino, JP;
Ryo Kikuchi, Musashino, JP;
NTT, Inc., Tokyo, JP;
Abstract
A secure sigmoid function calculation system is a system in which mapis assumed to be secure batch mapping defined by parameters (a, . . . , a) representing the domain of definition of a sigmoid function σ(x) and parameters (σ(a), . . . , σ(a)) representing the range of the sigmoid function σ(x) (a, . . . , aare real numbers that satisfy a< . . . <a) and which is configured with three or more secure sigmoid function calculation apparatuses and calculates, from a share [[x]] of an input vector x, a share [[y]] of a value yof a sigmoid function for the input vector x, the system including a secure batch mapping calculating means that calculates the share [[y]] by [[y]]=map([[x]])=([[σ(a)]], . . . , [[σ(a]]) (where f(i) (0≤i≤m−1) is j that makes a≤x<ahold).