Distributed Ledger Node Operational Status Verification

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Solution Overview

Problem

In distributed ledger systems, it is challenging to confirm the secure deletion of data across multiple nodes, particularly in ensuring that all backup data has been properly deleted, as individual nodes' processing cannot be easily verified by other nodes.

Innovation Solution

A distributed ledger device that includes a storage device and a processor unit, where the processor transmits content information about processing operations to other devices, allowing for the registration and verification of operational logs with assigned signatures, ensuring that operational processing status can be easily and appropriately confirmed across the network.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If data backup is performed from each participating node individually, then data redundancy and system reliability are improved, but the ability to confirm secure deletion of backup data across all nodes deteriorates

Engineering Contradiction:
Improvesystem reliabilityVSAvoiddifficulty of confirming secure deletion
Core Design Contradiction:
ReliabilityVSDifficulty of detecting and measuring

Solution Approach 1:

The patent implements a feedback mechanism where each node reports its backup data deletion status to other nodes in the distributed ledger system. When a node deletes backup data, it generates a deletion record that is stored in the distributed ledger, allowing other nodes to verify the deletion status. This feedback loop enables comprehensive confirmation of secure deletion across all nodes while maintaining system reliability through individual node autonomy.

Inventive Principle:
Principle #23Feedback

2Productivity

If operational processing is executed at unified timing across all nodes, then system coordination and policy alignment are improved, but the ability to verify processing completion at each node deteriorates

Engineering Contradiction:
Improvesystem coordination efficiencyVSAvoiddifficulty of verifying processing completion
Core Design Contradiction:
ProductivityVSDifficulty of detecting and measuring

Solution Approach 1:

The patent introduces the distributed ledger as an intermediary mechanism that records and verifies operational processing status at each node. When operational processing is executed at unified timing, each node's processing result is recorded in the distributed ledger, serving as verifiable evidence. This intermediary recording mechanism allows the system to maintain unified coordination timing while enabling independent verification of processing completion at each node through the immutable ledger records.

Inventive Principle:
Principle #24Intermediary (Mediator)

Data Source

PatentUS11483158B2Distributed ledger device, distributed ledger system, and distributed ledger management method
Publication Date: 2022.10.25 HITACHI LTD
  • US11483158B2 patent drawing
  • US11483158B2 patent drawing
  • US11483158B2 patent drawing

AI summary

Provided is a distributed ledger device, aiming at easily and appropriately determining a status of operational processing on a distributed ledger in a certain distributed ledger device at another distributed ledger device. A BC node in a BC system including a plurality of BC nodes that manage a distributed ledger for a predetermined target transaction, the BC node including: the storage device; and the processor, in which the storage device stores the distributed ledger, and the processor, when executing processing relating to the distributed ledger, transmits content information indicating contents of the processing to be managed by another BC node that manages the distributed ledger. The processor may transmit an instruction to register the content information in another distributed ledger managed by the plurality of BC nodes that manage the distributed ledger.