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:
Apr. 04, 2023
Filed:
Feb. 25, 2021
Hitachi, Ltd., Tokyo, JP;
Nao Nishijima, Tokyo, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A distributed ledger management method performed by each of nodesconfiguring a distributed ledger system, includes: holding, in an end block, signatures of respective organizations operating the respective nodes, hash values of respective groups of blocks into which a blockchainis divided by a number of the operating organizations, information on organizations by which the group of blocks is to be held, and a verification frequency for the hash value between the organizations; specifying a group of blocks to be held by the organization; deleting a block other than the group of blocks in the blockchain; and performing a tamper verification of requesting a nodeof another organization to transmit the hash value of the group of blocks to be held by the other organization at a verification frequency, and collating the hash value with the hash value included in the end block