Granted Patent B2

US 12,505,235 · App. 18/372,161 · Granted Dec 23, 2025

Inventors: Satoshi Tanaka (Tokyo, JP); Yoichi Sakurai (Tokyo, JP); Masashi Sawada (Tokyo, JP)

Assignee: NTT COMMUNICATIONS CORPORATION

G06F21/604

Abstract

Claims (36)

1 . A processing system that distributes registration data that a registrar device has to a plurality of servers in a state of being segmented shares, and stores the registration data in the servers,

each of the servers comprising:

first processing circuitry configured to:

perform anonymization on the shares; and

provide anonymization-processed information on which anonymization is performed in the state of being shares, wherein

the registrar device includes:

second processing circuitry configured to:

segment the registration data into a plurality of shares, distribute the plurality of shares to the servers, respectively, and cause the servers to register the plurality of shares,

select an anonymization processing method, and

perform evaluation in anonymity and utility on the anonymization-processed information on which anonymization is performed and, when the anonymization-processed information has the anonymity and the utility, notify the servers of a permission to provide the anonymization-processed information, and

the first processing circuitry is further configured to:

perform anonymization on the plurality of shares using the anonymization processing method that is selected, and

provide the anonymization-processed information about which a notification of the permission to provide the anonymization-processed information is made.

2 . The processing system according to claim 1 , wherein;

the first processing circuitry is further configured to perform anonymization on the shares by performing multi-party computation in which computation and exchange of data are performed between the servers.

3 . The processing system according to claim 1 , wherein:

after the plurality of shares are distributed to the servers, respectively, and are registered in the servers, the second processing circuitry is further configured to select the anonymization processing method.

4 . The processing system according to claim 1 , wherein:

after the plurality of shares are distributed to the servers, respectively, and are registered in the servers, and when a computation process is requested by a user device, the second processing circuitry is further configured to select an anonymization processing method corresponding to the requested computation process.

5 . A processing method that is executed by a processing system that distributes registration data that a registrar device has to a plurality of servers in a state of being segmented shares, and stores the registration data in the servers, the processing method comprising:

performing anonymization on the shares;

providing anonymization-processed information on which anonymization is performed in the state of being shares;

segmenting the registration data into a plurality of shares, distributing the plurality of shares to the servers, respectively, and causing the servers to register the plurality of shares,

selecting an anonymization processing method,

performing evaluation in anonymity and utility on the anonymization-processed information on which anonymization is performed and, when the anonymization-processed information has the anonymity and the utility, notify the servers of a permission to provide the anonymization-processed information,

performing anonymization on the plurality of shares using the anonymization processing method that is selected, and

providing the anonymization-processed information about which a notification of the permission to provide the anonymization-processed information is made.

6 . A non-transitory computer-readable recording medium storing therein a processing program that causes a computer to execute a process comprising:

storing registration data in a distributed manner in a state of being shares obtained by segmenting registration data;

performing anonymization on the shares;

providing anonymization-processed information on which the anonymization is performed in the state of being shares;

segmenting the registration data into a plurality of shares, distributing the plurality of shares to a plurality of servers, respectively, and causing the servers to register the plurality of shares,

selecting an anonymization processing method,

performing evaluation in anonymity and utility on the anonymization-processed information on which anonymization is performed and, when the anonymization-processed information has the anonymity and the utility, notify the servers of a permission to provide the anonymization-processed information,

performing anonymization on the plurality of shares using the anonymization processing method that is selected, and

providing the anonymization-processed information about which a notification of the permission to provide the anonymization-processed information is made.

Assignments (2)

Priority Claims (1)

Continuity (2)

References Cited (18)