Authoritative Source

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Definitions:

An entity that has access to, or verified copies of, accurate information from an issuing source such that a CSP can confirm the validity of the identity evidence supplied by an applicant during identity proofing. An issuing source may also be an authoritative source. Often, authoritative sources are determined by a policy decision of the agency or CSP before they can be used in the identity proofing validation phase.
Sources:
NIST SP 800-63-3

Glossary Comments

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See NISTIR 7298 Rev. 3 for additional details.