HIDDEN SIGMOID FUNCTION CALCULATION SYSTEM, HIDDEN LOGISTIC REGRESSION CALCULATION SYSTEM, HIDDEN SIGMOID FUNCTION CALCULATION DEVICE, HIDDEN LOGISTIC REGRESSION CALCULATION DEVICE, HIDDEN SIGMOID FUNCTION CALCULATION METHOD, HIDDEN LOGISTIC REGRESSION CALCULATION METHOD, AND PROGRAM

• Main Authors: HAMADA KOKI, IGARASHI MASARU, KIKUCHI MAKOTO, MISHINA IBUKI
• Format: Patent
• Language: Chinese; English
• Published: 14.05.2021
• Subjects: ADVERTISING; CODING OR CIPHERING APPARATUS FOR CRYPTOGRAPHIC OR OTHERPURPOSES INVOLVING THE NEED FOR SECRECY; CRYPTOGRAPHY; DISPLAY; EDUCATION; PHYSICS; SEALS

Provided is a technology that performs high-speed and highly accurate hidden sigmoid function calculations. This hidden sigmoid function calculation system uses g(x) as a function for which hidden calculations can be made and calculates the sigmoid function value share [[sigma'(x)]] relative to an input value x, from the input value x share [[x]]. The hidden sigmoid function calculation system includes: a first comparison means that generates a first comparison result [[c]]=less_than([[x]],t1); a second comparison means that generates a second comparison result [[d]]=greater_than([[x]],t0); a first logical calculation means that generates a first logical calculation result [[e]]=not([[c]]); a second logical calculation means that generates a second logical calculation result[[k]]=and([[c]],[[d]]) or [[k]]=mul([[c]],[[d]]); and a function value calculation means that calculates a share [[sigma'(x)]]=mul([[k]],[[g(x)]])+[[e]]. 提供高速并且高精度地对S型函数进行秘密计算的技术。秘密S型函数计算系统将g(x)设为能秘密计算的函数，根据输入值x的份额[[x]]计算对于输入值x的S型函数的值的份额[[