Zero-Knowledge Proofs for GDPR-Compliant Healthcare Data Sharing
Blog post from Didit
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Zero-Knowledge Proofs (ZKPs) are presented as a privacy-preserving cryptographic approach that allows healthcare organizations to verify patient-related attributes or eligibility criteria without revealing underlying sensitive records, supporting GDPR principles such as data minimization and privacy by design. Potential uses include clinical-trial recruitment, insurance-claim validation, inter-organizational research data linkage, and access control, enabling institutions to confirm facts such as age, diagnoses, treatment history, or authorization without transmitting full medical histories. Unlike anonymization and pseudonymization, which may retain re-identification risks, ZKPs aim to provide verifiable assertions while limiting data exposure. Adoption nevertheless faces challenges including computational demands, integration with legacy healthcare systems, the need for interoperable standards, and specialized technical expertise. The material also describes Didit as an identity-verification platform whose ID and address verification services could complement ZKP-based systems by confirming that participating professionals and organizations are legitimate and authorized.
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