data-classification.md

Data Classification Matrix

PHI Classification

• Vision records, patient profiles, examination data
• Storage: Off-chain encrypted, on-chain hash
• Access: Patient consent required

PII Classification

• Patient addresses, provider identities
• Storage: Encrypted off-chain
• Access: Role-based

Public Data

• Contract metadata, governance proposals
• Storage: On-chain public
• Access: Open

Confidential Data

• Admin keys, encryption keys
• Storage: Hardware security modules
• Access: Multi-signature required