公开(公告)号：US11880489B2

公开(公告)日：2024-01-23

申请号：US17274187

申请日：2019-08-28

Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Satoshi Tanaka ,  Asami Miyajima ,  Gen Takahashi ,  Dai Ikarashi ,  Koki Hamada ,  Ryo Kikuchi ,  Hitoshi Fuji

IPC: G06F21/62 ,  G09C1/00 ,  G06N7/01

CPC classification number: G06F21/6245 ,  G06N7/01 ,  G09C1/00

Abstract: Provided is a technique for performing statistical processing such as processing for obtaining parameters of logistic regression analysis faster than before. A secure statistical processing system includes a cross tabulation table computing device 2 that performs secure computation on a cross tabulation table in which frequencies are in plain texts while keeping each record concealed; and a statistical processing device 3 that performs predetermined statistical processing using the cross tabulation table in which frequencies are in plain texts. The cross tabulation table computing device 2 may include a plurality of secure computation devices 221, . . . , 22N that perform secure computation on a cross tabulation table in which frequencies are fragments subjected to secret sharing while keeping each record concealed, and a management device 21 that restores the fragments to compute the cross tabulation table in which frequencies are in plain texts.

公开(公告)号：US11537726B2

公开(公告)日：2022-12-27

申请号：US16772543

申请日：2018-12-14

Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Satoshi Tanaka ,  Ryo Kikuchi ,  Koji Chida

IPC: G06F21/60

Abstract: A secret computation system is a secret computation system for performing computation while keeping data concealed, and comprises a cyphertext generation device that generates cyphertext by encrypting the data, a secret computation device that generates encrypted basic statistics by performing secret computation of predetermined basic statistics using the cyphertext while keeping the cyphertext concealed, and a computation device that generates decrypted basic statistics by decrypting the encrypted basic statistics and performs predetermined computation using the decrypted basic statistics.