Distributed Ledger Key Exchange for Reliable Data Transactions

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Solution Overview

Problem

Existing data transaction systems face challenges in reliably recording transaction records without incurring significant effort or cost, leading to discrepancies between actual data exchange and transaction records, which can result in unfair profits for data providers or consumers.

Innovation Solution

An information processing system that uses a distributed ledger platform to inseparably execute the provision of encryption keys to data consumers and record transaction records, leveraging smart contract functions to ensure synchronization between data exchange and transaction completion, while maintaining data security and allowing for transaction cancellation within a predetermined period.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If traditional data transaction systems are used to exchange data, then data exchange can be performed, but transaction records cannot be reliably recorded without significant effort, leading to discrepancies between actual data exchange and transaction records

Engineering Contradiction:

Improvetransaction record reliabilityVSAvoidsystem complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent introduces a distributed ledger platform as an intermediary system that automatically records transaction records during data exchange. The control unit acts as a mediator that coordinates between data provider and data consumer, using the distributed ledger to ensure reliable and tamper-proof recording of transaction records without requiring complex manual verification processes.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The patent replaces traditional manual or centralized record-keeping mechanisms with an automated distributed ledger system. The smart contract functionality automatically executes and records transactions, eliminating the need for complex manual coordination and ensuring reliable recording through cryptographic verification and distributed consensus.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

2Ease of operation

If encryption keys are provided to data consumers to enable data decryption, then data accessibility is improved, but security risks increase if keys are not properly managed or recorded

Engineering Contradiction:

Improvedata accessibilityVSAvoidsecurity risks

Core Design Contradiction:

Ease of operationVSObject-affected harmful factors

Solution Approach 1:

The distributed ledger platform serves as a secure intermediary for encryption key management. The control unit coordinates the key provision process, ensuring that keys are securely transmitted and recorded only to authorized data consumers. The system maintains security by using cryptographic mechanisms and centralized recording of key transfer transactions.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The patent replaces traditional key distribution mechanisms with automated cryptographic key management through the distributed ledger. The smart contract system automatically handles key provisioning, tracking, and recording, eliminating manual key management processes and reducing security risks through automated verification and immutable recording.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

3Adaptability or versatility

If transaction records are recorded separately from data exchange processes, then recording flexibility is improved, but discrepancies between actual exchange and records increase

Engineering Contradiction:

Improverecording flexibilityVSAvoidtransaction record accuracy

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The patent merges the data exchange process with the transaction record recording process by using the distributed ledger platform to automatically record transactions during data exchange. The control unit integrates key provision and record recording into a single coordinated process, ensuring that transaction records accurately reflect actual data exchange while maintaining flexibility through the distributed ledger's programmable smart contract functionality.

Inventive Principle:

Principle #5Merging (Combining)

Data Source

PatentUS12574212B2Information processing system, information processing method, and non-transitory storage medium for exchanging and comparing an encrypted key, encrypted data, and a hash value of the encrypted data via a distributed ledger platform

Publication Date: 2026.03.10 TOYOTA JIDOSHA KK

AI summary

Provided is an information processing system that mediates a data transaction between a data provider (DP) and a data consumer (DC), the information processing system including a control unit that inseparably executes making an encryption key for encrypted data obtained by encrypting data exchanged between the data provider and the data consumer available to the data consumer, or causing the data consumer to actually obtain the encryption key, and recording transaction complete between the data provider and the data consumer.