What HIPAA requires you to do
• Minimum necessary use — HIPAA requires you to disclose only the minimum PHI needed for the task. Tokenization is the most aggressive minimum-necessary posture: zero PHI is disclosed.
• Business Associate Agreements — Any third party that touches PHI needs a BAA. With Cypherz, the LLM provider never touches PHI — only your infrastructure does. (We sign BAAs at Business and Enterprise tiers.)
• Audit controls — 164.312(b) requires audit trails for PHI access. Cypherz logs every tokenize, detokenize, and proxy call with structured metadata.
• Access controls — Per-project encryption keys and API keys enforce role-based access. No global plaintext access path.