公开(公告)号：US20220005025A1

公开(公告)日：2022-01-06

申请号：US17191983

申请日：2021-03-04

Applicant: HITACHI, LTD.

Inventor： Koshi IKEGAWA ,  Nao NISHIJIMA ,  Yoji OZAWA

IPC: G06Q20/38 ,  G06Q20/40 ,  H04L9/06 ,  H04L29/08

Abstract: A distributed ledger management system 10 includes: an orderer node 100 that generates a block containing transactions issued by a client 300, verifies the validity of the transactions contained in the block, distributes the block and verification results to a peer node 200, adds the block to a blockchain 125 in its storage device, and stores the verification results in its storage device; and the peer node 200 that receives the block and verification results from the orderer node 100, adds information on predetermined events indicated by the transactions to state information 225 in a storage device of the peer node, and discards the block and verification results.

公开(公告)号：US20240388455A1

公开(公告)日：2024-11-21

申请号：US18690108

申请日：2023-01-27

Applicant: Hitachi, Ltd.

Inventor： Koshi IKEGAWA

IPC: H04L9/00

Abstract: In a data management system 0001 configured to manage data usage between organizations participating in a distributed ledger system, in a node of a first organization, data is encrypted and passed to a node of a second organization, and in an encrypted region in the node of the second organization, the encrypted data is decrypted and predetermined processing is executed on the decrypted data.

公开(公告)号：US20240296448A1

公开(公告)日：2024-09-05

申请号：US18240368

申请日：2023-08-31

Applicant: Hitachi, Ltd.

Inventor： Koshi IKEGAWA ,  Nao NISHIJIMA

IPC: G06Q20/40 ,  G06Q20/36

CPC classification number: G06Q20/401 ,  G06Q20/36 ,  G06Q20/389

Abstract: A secret key needed for access to a wallet or data movement is managed in a non-centralized manner. A distributed ledger data management system 10 includes a blockchain distributed ledger system (an asset management distributed ledger 11) which is configured to have a plurality of distributed ledger nodes (asset management distributed ledger nodes 22) and a distributed ledger network (an asset management distributed ledger network 21), and a plurality of utilization group systems which each manage, as a corresponding one of respective clients for a plurality of utilization groups for individuals and organizations participating in the distributed ledger system, a wallet of the utilization group for the individual or the organization. The utilization group system for the organization (a system for a utilization group 13) issues a transaction to the distributed ledger system by using an encrypted secret key of the organization when the wallet of the organization is used.