Direct Secure Messaging:
DirectTrust maintains and governs the Accredited Trust Anchor Bundle (ATAB), which is a vetted collection of trust anchors from Accredited Certificate Authorities (CAs) participating in Direct Secure Messaging. These CAs issue certificates to identity-proofed organizations and individuals for use within secure healthcare workflows, such as referrals, care coordination, and transitions of care. All certificates within this trust framework conform to DirectTrust’s technical and policy standards and are interoperable across the entire DirectTrust network. The ecosystem includes dozens of accredited HISPs (Health Information Service Providers) and CAs that ensure strong identity, privacy, and security foundations for millions of Direct addresses in production use today.
Find more information about the Accredited Trust Anchor Bundle here.
Find more information about Accredited Certificate Authorities and HISPs here.
Query-Based Exchange:
A subset of DirectTrust Accredited Certificate Authorities (CAs) issue certificates specifically for Query-Based Exchange use cases, such as participation in eHealth Exchange and Carequality. DirectTrust coordinates the certificate issuance intake process and manages the relationships among participants, implementers, and the CAs. This coordination ensures that certificates meet the unique technical and governance requirements of these national exchange frameworks while preserving trust and interoperability.
Find more information about the Sequoia Initiatives Trust Bundle here.
