SECRET-SHARING COMPUTATION SYSTEM, RELAY DEVICE, METHODS THEREOF, AND PROGRAM

Title:

SECRET-SHARING COMPUTATION SYSTEM, RELAY DEVICE, METHODS THEREOF, AND PROGRAM

Document Type and Number:

WIPO Patent Application WO/2023/181174

Kind Code:

A1

Abstract:

The purpose of the present invention is to implement secret-sharing multi-party computing in a more advanced secret environment. A multi-party computing method includes: in a multi-party computing system including at least one user device, and two or more MPC operation devices, using a relay device that relays communication between the user device and each of the MPC operation devices; the relay device receiving first encryption keys generated by each of the MPC operation devices, and further sending the first encryption keys to the user device; receiving a share that is secret-shared by the user device and encrypted using the first encryption key, and receiving a second encryption key generated by the user device, and transmitting the share and the second encryption key to each of the MPC operation devices; and the relay device further receiving, from each of the MPC operation devices, operation result shares encrypted using the second encryption key from the user device, and transmitting the same to the user device.

More Like This:

JP3491422	DIGITAL SIGNAL CONVERTER AND FORMATION OF PARALLEL LINEAR FEEDBACK TYPE SHIFT REGISTER
WO/1996/008092	ROVING SOFTWARE LICENSE FOR A HARDWARE AGENT
WO/1999/067919	IMPROVED DES AND OTHER CRYPTOGRAPHIC PROCESSES WITH LEAK MINIMIZATION FOR SMARTCARDS AND OTHER CRYPTOSYSTEMS

Inventors:

NARA MASAHIRO (JP)
ISSHIKI TOSHIYUKI (JP)
MORI KENGO (JP)
FUKUDA HARUNA (JP)
FUJII SATORU (JP)
TAKASEKI TAKUYA (JP)

Application Number:

PCT/JP2022/013524

Publication Date:

September 28, 2023

Filing Date:

March 23, 2022

Export Citation:

Click for automatic bibliography generation Help

Assignee:

NEC CORP (JP)

International Classes:

G09C1/00

Domestic Patent References:

WO2016056473A1

2016-04-14

Other References:

"Introduction to Cryptography", 25 February 1993, KYORITSU SHUPPAN CO., LTD., JP, ISBN: 4-320-02633-0, article OKAMOTO, EIJI: "Passage; Introduction to cryptographic theory", pages: 110 - 11, XP009550011

Attorney, Agent or Firm:

KATO, Asamichi (JP)

Download PDF:

View/Download PDF PDF Help

Previous Patent: SCROLL COMPRESSOR

Next Patent: ENDOSCOPIC EXAMINATION ASSISTANCE SYSTEM, ENDOSCOPIC EXAMINATION ASSISTANCE METHOD, AND STORAGE MEDI...