This guideline focuses on the authentication of subjects who interact with government information systems over networks to establish that a given claimant is a subscriber who has been previously authenticated. The result of the authentication process may be used locally by the system performing the authentication or may be asserted elsewhere in a federated identity system. This document defines technical requirements for each of the three authenticator assurance levels. The guidelines are not intended to constrain the development or use of standards outside of this purpose. This publication supersedes NIST Special Publication (SP) 800-63B.
authentication; authentication assurance; credential service provider; digital authentication; digital credentials; electronic authentication; electronic credentials; passwords.