5.6.2. Setup SAML v2 based Web SSO using HTTP/Redirect Binding

Identity Provider: The Identity Provider is the authoritative entity responsible for authenticating an end user and asserting the identity for that user in a trusted fashion to trusted partners.

Service Provider: The Service Provider relies on the Identity Provider to assert information about a user via an electronic user credential, leaving the service provider to manage access control and dissemination based on a trusted set of user credential assertions.