Approval-Based Distributed Ledger for Manufacturing Data Integrity
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Solution Overview
Problem
Existing digital manufacturing systems face challenges in ensuring reliable transmission and integrity of engineering data across distributed networks, particularly in additive manufacturing, where centralized servers are prone to uptime limitations and insider threats.
Innovation Solution
An approval-based distributed ledger system utilizing a blockchain architecture with nodes for submitting, approving, and fabricating manufacturing file packets, ensuring that only approved and tamper-resistant data is used for manufacturing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a centralized server is used to provide manufacturing data, then a single source of truth is established, but the system becomes vulnerable to uptime limitations and insider threats
Solution Approach 1:
The centralized server architecture is segmented into multiple distributed ledger nodes, each maintaining a copy of the manufacturing data. This segmentation eliminates the single point of failure while preserving the single source of truth through consensus mechanisms among nodes.
Solution Approach 2:
A blockchain intermediary layer is introduced between data submitters and manufacturing consumers. This intermediary validates and secures transactions through cryptographic proofs and consensus protocols, protecting against insider threats while maintaining data availability.
2Adaptability or versatility
If data is transmitted across distributed networks, then manufacturing flexibility is improved, but data transmission reliability deteriorates
Solution Approach 1:
Data is pre-validated and sealed into blockchain blocks before transmission across the distributed network. This preliminary action ensures data integrity is established beforehand, allowing reliable transmission without requiring complex verification at each network node.
Solution Approach 2:
The system implements cryptographic feedback mechanisms where each node verifies data integrity through digital signatures and hash validations. This feedback loop ensures that even across unreliable network connections, data transmission reliability is maintained through immediate detection and rejection of corrupted data.
3Device complexity
If conventional centralized systems are used, then system simplicity is maintained, but vulnerability to tampering increases
Solution Approach 1:
The system converts the potential harm of distributed network complexity into a benefit by using the distributed nature to create cryptographic consensus. The very complexity that increases tampering resistance also enables the consensus mechanism to validate and secure data across multiple nodes, turning architectural complexity into a security feature.
Solution Approach 2:
Instead of relying on a single centralized copy of manufacturing data, the system creates multiple identical copies across distributed ledger nodes. Each copy is cryptographically linked to the others through hash chains, making tampering detectable while maintaining data availability through redundant copies.
Data Source
AI summary
Exemplary embodiments provide a distributed ledger system that may comprise a ledger network configured to have various entry sequences, wherein a sequence is associated with an element intended for manufacturing and an entry in the sequence is associated with an element file packet with instructions for undertaking the manufacturing of the element. The system may also comprise: at least one submitter node configured to submit a proposed entry transaction to the ledger network, wherein the proposed entry transaction includes a revised element file packet; and at least one approval node configured to review the proposed entry transaction and provide approval if threshold criteria are met. If the approval is provided by the at least one approval node, the proposed entry transaction and the revised element file packet become a latest entry and latest element file packet in the sequence. The system may also comprise at least one fabrication node and at least one end point.