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. 07, 2025
Filed:
Jan. 20, 2020
Nippon Telegraph and Telephone Corporation, Tokyo, JP;
Dai Ikarashi, Musashino, JP;
NIPPON TELEGRAPH AND TELEPHONE CORPORATION, Tokyo, JP;
Abstract
A secret share value [f(x)−f'(x)] of f(x)−f′(x) is obtained through secure computation using a secret share value [x] of a real number x, and a secret share value [f(x)−f′(x)]of (f(x)−f′(x))obtained by right-shifting f(x)−f′(x) by the predetermined number of bits is obtained through secure computation using the secret share value [f(x)−f′(x)]. Here, [μ] is a secret share value of μ, n is an integer equal to or greater than 1, t=0, . . . , n−1, u=1, . . . , n−1, f(x) is a function of the real number x, f′(x) is an approximation function of the function f(x), a secret share value [f′(x)] of an approximation function f′(x) is [f′(x)]=c+c[x], a secret share value [f′(x)] of an approximation function f′(x) is [f′(x)]=c+c[x]+c[f(x)]+ . . . +c[f(x)], cis a public value, and c, . . . , care coefficients.