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    Glossary
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assertion

Definitions:

  A verifiable statement from an IdP to an RP that contains information about an end user. Assertions may also contain information about the end user’s authentication event at the IdP.
Sources:
FIPS 201-3 under Assertion

  A statement from an IdP to an RP that contains information about an authentication event for a subscriber. Assertions can also contain identity attributes for the subscriber in the form of attribute values, derived attribute values, and attribute bundles.
Sources:
NIST SP 800-63-4 [

  

]
NIST SP 800-63A-4 [

  

]

  A statement from an IdP to an RP that contains information about an authentication event for a subscriber. In federation, the assertion is the evidence that the IdP sends to the RP that the user has logged in. It can also contain user identifiers such as a username or email address and information about how the user logged in, such as whether MFA was used.
Sources:
NIST IR 8523 [

  

] from NIST SP 800-63-4 - adapted