THIIC is a cryptographic protocol that lets two parties exchange hashed healthcare identifiers without either side transmitting raw PII — or trusting a third-party intermediary.
THIIC is a protocol, not a platform. It composes four standard cryptographic primitives — SHA-256, HKDF-SHA256, AES-256-GCM, and Ed25519 — in a bilateral salting configuration that lets two parties exchange hashed patient identifiers without either party possessing enough cryptographic context to act alone.
The protocol was designed for healthcare data partnerships: bilateral exchanges between a data licensor and an activation partner, where HIPAA compliance, audit defensibility, and removal of vendor middleware are first-class architectural requirements.
THIIC is not new cryptography. It is a specific, documented configuration of proven NIST- and IETF-standardized primitives, optimized for the exact shape of a pharma audience data exchange. Every primitive has published test vectors, independent review, and decades of real-world deployment.