Distributed Ledger Content Permission Management

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Solution Overview

Problem

Existing content browsing technologies struggle to appropriately manage changes in permission or prohibition for browsing content over time, particularly in regards to human relationships or other factors that may affect the visibility of content.

Innovation Solution

A control method and content management system utilizing a distributed ledger system, where servers acquire and store transaction data including identification information and permission/prohibition information for content, ensuring secure and tamper-proof management of browsing permissions.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If content browsing permission management is implemented using traditional centralized systems, then the system structure is simple, but the system cannot appropriately manage changes in permission/prohibition information over time and lacks security against tampering

Engineering Contradiction:

Improvepermission management reliabilityVSAvoidsystem complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The system segments the permission management function into distributed nodes (servers) that each maintain a copy of the ledger, eliminating the need for a single centralized authority while improving reliability through distribution

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

A distributed ledger acts as an intermediary between content providers and browsing devices, recording permission changes immutably and enabling trustless verification without requiring complex centralized authentication mechanisms

Inventive Principle:

Principle #24Intermediary (Mediator)

2Reliability

If distributed ledger technology is used to manage content browsing permissions, then the security and tamper-proof capability are improved, but the system complexity increases

Engineering Contradiction:

Improvepermission management reliabilityVSAvoidsystem complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The distributed ledger serves multiple functions simultaneously: it acts as a permission registry, a change history archive, a verification mechanism, and a coordination platform, reducing the need for separate systems and minimizing overall complexity despite the advanced technology used

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Loss of information

If permission changes are recorded in a distributed ledger, then the ability to track and enforce permission changes is improved, but the data storage requirements and processing overhead increase

Engineering Contradiction:

Improvepermission information retentionVSAvoiddata storage quantity

Core Design Contradiction:

Loss of informationVSQuantity of substance

Solution Approach 1:

The system extracts and stores only the essential permission-related information (content identifier, permission status, timestamp, signer) in the distributed ledger, separating critical metadata from the actual content data, thereby minimizing storage requirements while maintaining complete permission history

Inventive Principle:

Principle #2Taking out (Extraction)

Data Source

PatentUS12314415B2Control method, contents management system, recording medium, and data structure

Publication Date: 2025.05.27 PANASONIC INTELLECTUAL PROPERTY CORP OF AMERICA

AI summary

A control method that is used in a content management system including a plurality of servers, each holding a distributed ledger, and that is executed by one of the servers includes acquiring first transaction data from a providing device and storing the acquired first transaction data in the distributed ledger held by each server, the first transaction data including identification information for specifying content provided by the providing device and permission/prohibition information regarding whether to permit or prohibit the browsing of the content.