> For the complete documentation index, see [llms.txt](https://humb-io.gitbook.io/humb.io-docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://humb-io.gitbook.io/humb.io-docs/privacy-and-compliance-architecture.md). # Privacy and Compliance Architecture ### Zero Knowledge Verification Healthcare requires privacy. Traditional blockchain transparency is incompatible with medical data protection requirements, and HUMB solves this through zero-knowledge proof technology. #### How Zero-Knowledge Proofs Work A zero-knowledge proof allows one party to prove something is true without revealing the underlying information. In healthcare terms, a patient can verify their identity without revealing their diagnosis or medical history. #### What Gets Stored On Chain * Cryptographic proofs of verification status * Consent hashes (proof that consent was given, not what was consented to) * Audit anchors (proof that events occurred, not event details) * Access permission records #### What Never Gets Stored On Chain * Protected Health Information (PHI) * Personal identification data * Medical records or diagnoses * Clinical notes or imaging * Any data that could identify an individual ### KYH Privacy Model KYH (Know Your Healthcare) is HUMB's approach to verifying healthcare credentials without exposing sensitive information. #### For Healthcare Professionals Doctors, nurses, and other healthcare workers can verify their credentials through HUMB's KYH process. Their license numbers, specializations, and certifications are verified off-chain by accredited partners. Only a cryptographic attestation is recorded on the chain. #### For Patients Patients can participate in data-sharing programs or clinical trials without revealing their medical history. They provide data to verified research partners off-chain and receive cryptographic proofs of participation. ### HIPAA and GDPR Technical Approach HUMB is designed from the ground up to comply with major healthcare privacy regulations. #### HIPAA Compliance (United States) * PHI is never stored on the blockchain * All data handling follows the minimum necessary principle * Audit trails are maintained for all access attempts * Business Associate Agreements with all partners handling PHI * Breach notification procedures are in place #### GDPR Compliance (European Union) * Lawful basis established for all data processing * Right to erasure honored through off-chain data architecture * Data minimization is enforced at the protocol level * Explicit consent is required for all data collection * Data Processing Agreements with all partners --- # Agent Instructions This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com. ## Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter, and the optional `goal` query parameter: ``` GET https://humb-io.gitbook.io/humb.io-docs/privacy-and-compliance-architecture.md?ask=&goal= ``` `ask` is the immediate question: it should be specific, self-contained, and written in natural language. `goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.