Information processing device, information processing system, and information processing method, and program

Patent metadata

Field	Value
Publication number	US-2018366227-A1
Application number	US-201616063325-A
Country	US
Kind code	A1
Filing date	Nov 28, 2016
Priority date	Jan 7, 2016
Publication date	Dec 20, 2018
Grant date	—

Abstract

To achieve high-speed and efficient parameter calculation processing of a logistic regression model. A logistic regression parameter is calculated, the logistic regression parameter being a parameter of the logistic regression model indicating the relationship between an explanatory variable and an outcome variable being secure data corresponding to each sample. A data processing unit calculates the inner product (t_s) of the explanatory variable and the outcome variable with application of secure computation being computation processing applied with converted data of each of the variables, and performs computation processing excluding the calculation processing of the inner product, as computation processing without the converted data, to calculate the logistic regression parameter in accordance with the maximum likelihood method with the Newton-Raphson method (iterative convergence method).

First claim

1 . An information processing device comprising:
a data processing unit configured to calculate a logistic regression parameter being a parameter of a logistic regression model indicating a relationship between a first variable and a second variable being two different types of secure data associated with each sample, wherein the data processing unit calculates an inner product (t_s) of the first variable and the second variable with application of secure computation being computation processing applied with converted data of each of the variables, and performs computation processing excluding the calculation processing of the inner product, as computation processing without the converted data, to calculate the logistic regression parameter.

2 . The information processing device according to claim 1 , wherein the data processing unit calculates the logistic regression parameter in accordance with a maximum likelihood method with a Newton-Raphson method (iterative convergence method).

3 . The information processing device according to claim 1 , wherein the first variable is an explanatory variable, and the second variable is an outcome variable.

4 . The information processing device according to claim 3 , wherein the data processing unit performs the calculation processing of the inner product (t_s) of the explanatory variable and the outcome variable with the secure computation applied with segmented data of the explanatory variable and segmented data of the outcome variable.

5 . The information processing device according to claim 3 , wherein the information processing device is a retaining device of the explanatory variable, and
the data processing unit performs the computation processing excluding the calculation processing of the inner product, applied with the explanatory variable, as computation processing applied with the explanatory variable remaining intact, without the application of the secure computation, in the calculation processing of the logistic regression parameter based on a maximum likelihood method with a Newton-Raphson method (iterative convergence method).

6 . The information processing device according to claim 3 , wherein the information processing device is a retaining device of the explanatory variable, and
the data processing unit receives a computed result applied with the outcome variable from an outcome-variable retaining device, and calculates the logistic regression parameter with the computed result applied with the received outcome variable.

7 . The information processing device according to claim 6 , wherein the computed result applied with the outcome variable is a sum total (t_0) of the outcome variable.

8 . The information processing device according to claim 3 , wherein the information processing device is a retaining device of the explanatory variable, and
the data processing unit outputs the logistic regression parameter calculated to an outcome-variable retaining device.

9 . An information processing system comprising:
an explanatory-variable retaining device retaining an explanatory variable being secure data associated with each sample; and an outcome-variable retaining device retaining an outcome variable being secure data associated with each sample, wherein the outcome-variable retaining device calculates and outputs a sum total (t_0) of the outcome variable associated with each sample to the explanatory-variable retaining device, the explanatory-variable retaining device includes a data processing unit configured to calculate a logistic regression parameter being a parameter of a logistic regression model indicating a relationship with the outcome variable, and the data processing unit calculates an inner product (t_s) of the explanatory variable and the outcome variable, with application of secure computation being computation processing applied with converted data of each of the variables, and calculates the logistic regression parameter with application of the inner product (t_s) calculated and the sum total (t_0) of the outcome variable input from the outcome-variable retaining device.

10 . The information processing system according to claim 9 , wherein the data processing unit calculates the logistic regression parameter in accordance with a maximum likelihood method with a Newton-Raphson method (iterative convergence method).

11 . The information processing system according to claim 9 , wherein the data processing unit performs the calculation processing of the inner product (t_s) of the explanatory variable and the outcome variable, with the secure computation applied with segmented data of the explanatory variable and segmented data of the outcome variable.

12 . The information processing system according to claim 9 , wherein the data processing unit performs computation processing excluding the calculation processing of the inner product, applied with the explanatory variable, as computation processing applied with the explanatory variable remaining intact, without the application of the secure computation, in the calculation processing of the logistic regression parameter based on a maximum likelihood method with a Newton-Raphson method (iterative convergence method).

13 . The information processing system according to claim 9 , wherein the explanatory-variable retaining device outputs the logistic regression parameter calculated to the outcome-variable retaining device.

14 . An information processing method to be performed in an information processing device including
a data processing unit configured to calculate a logistic regression parameter being a parameter of a logistic regression model indicating a relationship between a first variable and a second variable being two different types of secure data associated with each sample, the information processing method comprising: calculating, by the data processing unit, an inner product (t_s) of the first variable and the second variable with application of secure computation being computation processing applied with converted data of each of the variables; and calculating the logistic regression parameter with performance of computation processing excluding the calculation processing of the inner product, as computation processing without the converted data.

15 . An information processing method to be performed in an information processing system including:
an explanatory-variable retaining device retaining an explanatory variable being secure data associated with each sample; and an outcome-variable retaining device retaining an outcome variable being secure data associated with each sample, the information processing method comprising: calculating and outputting, by the outcome-variable retaining device, a sum total (t_0) of the outcome variable associated with each sample, to the explanatory-variable retaining device; and by a data processing unit included in the explanatory-variable retaining device, configured to calculate a logistic regression parameter being a parameter of a logistic regression model indicating a relationship with the outcome variable, calculating an inner product (t_s) of the explanatory variable and the outcome variable with application of secure computation being computation processing applied with converted data of each of the variables and calculating the logistic regression parameter with application of the inner product (t_s) calculated and the sum total (t_0) of the outcome variable input from the outcome-variable retaining device.

16 . A program for causing information processing to be executed in an information processing

Assignees

• Sony Corp

Inventors

• Kawamoto Yohei

Classifications

• H04L2209/46

  Secure multiparty computation, e.g. millionaire problem · CPC title

• G16H10/60

  for patient-specific data, e.g. for electronic patient records · CPC title

• G09C1/00

  Apparatus or methods whereby a given sequence of signs, e.g. an intelligible text, is transformed into an unintelligible sequence of signs by transposing the signs or groups of signs or by replacing them by others according to a predetermined system (cryptographic typewriters G09C3/00) · CPC title

• G06F17/18

  for evaluating statistical data {, e.g. average values, frequency distributions, probability functions, regression analysis (forecasting specially adapted for a specific administrative, business or logistic context G06Q10/04)} · CPC title

• G06F21/62

  Protecting access to data via a platform, e.g. using keys or access control rules · CPC title