(registered 2026-05-20, last updated 2026-05-20) Resource Identifier (RI) Scheme name: ztdnaid Status: Provisional Scheme syntax: ztdnaid (example: ztdnaid:62588568DE0D42ABF9BBFF9B0FD8D2FEB9A24C950AC66AFCD8679FA4C831392A) Scheme semantics: Asserts a Zero Trust Digital Network Access ID Encoding considerations: UPPERCASE UTF-8 Applications/protocols that use this scheme name: Software Assurance Guardian (SAG) product line Interoperability considerations: Unknown, use with care. Security considerations: Unknown, use with care. Contact: Registering party: Dick Brooks Scheme creator: Business Cyber Guardian Author/Change controller: Either the registering party or someone who is verified to represent the scheme creator. See previous answer. References: https://www.ietf.org/archive/id/draft-brooks-ztdnaid-new-01.txt