The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 04, 2025
Filed:
Aug. 25, 2023
Nomura Research Institute, Ltd., Tokyo, JP;
Masashi Kawaguchi, Tokyo, JP;
Nomura Research Institute, Ltd., Tokyo, JP;
Abstract
A data holding system holds n pieces of shares to be utilized for (m, n) secret distribution based multi-party computation (MPC) in n pieces of share holding servers in a distributed manner, and makes a new revision by updating each share based on a random number cooperatively in each of the share holding servers, to cancel an influence of the random number at a time of restoration of original data. In a case of an access state in which access to the share of the same revision occurs or is likely to occur in (m−1) pieces of the share holding servers, access to the held share is locked in other (n−(m−1)) pieces of the share holding servers.