Summary
The paper derives meta-requirements and three design principles for a GDPR-compliant blockchain-based credential verification system: use blockchain for trustworthy transparent verification with legitimate documents, use smart contracts to automate the process, and conform to GDPR via off-chain storage and zero-knowledge proofs.
Artifact
A GDPR-compliant blockchain-based credential (certificate) verification system.
Methodology
Design science research; interviews; meta-requirements; prototype using off-chain storage and zero-knowledge proofs.