Non-Fungible Blockchain Tokens for Traceable Online-Quality Assurance of Milled Workpieces
Nicolai Maisch, Shengjian Chen, Alexander Robertus, Samed Ajdinovi\'c, Armin Lechler, Alexander Verl, Oliver Riedel

TL;DR
This paper introduces a novel method using Non-Fungible Tokens on Ethereum blockchain to securely store and trace quality data of milled workpieces, enhancing online quality assurance with automation and interoperability.
Contribution
It presents a new concept and implementation leveraging NFTs and Asset Administration Shells for secure, interoperable, and traceable quality data management in manufacturing.
Findings
NFT-based storage enables secure data transfer.
Automated traceability reduces manual quality checks.
Integration with IPFS allows flexible data updates.
Abstract
This work presents a concept and implementation for the secure storage and transfer of quality-relevant data of milled workpieces from online-quality assurance processes enabled by real-time simulation models. It utilises Non-Fungible Tokens (NFT) to securely and interoperably store quality data in the form of an Asset Administration Shell (AAS) on a public Ethereum blockchain. Minted by a custom smart contract, the NFTs reference the metadata saved in the Interplanetary File System (IPFS), allowing new data from additional processing steps to be added in a flexible yet secure manner. The concept enables automated traceability throughout the value chain, minimising the need for time-consuming and costly repetitive manual quality checks.
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Taxonomy
TopicsDigital Transformation in Industry · Blockchain Technology Applications and Security · Physical Unclonable Functions (PUFs) and Hardware Security
