The most recent sets of standards, SAML 2.0 and WS-Federation, define two roles in an identity federation partnership: an Identity Provider (IdP) and a Service Provider (SP).
Earlier SAML 1.x specifications used the terms Asserting Party (for IdP) and Relying Party (for SP). For consistency and clarity, however, PingFederate® adopts the later terms IdP and SP across all specifications.
A third role, defined in the SAML 2.0 specifications and available in PingFederate, is that of an IdP Discovery provider.
With OAuth 2.0 and OpenID Connect 1.0 support, PingFederate can be configured as an authorization server (AS), an OpenID Provider (OP), and a Relying Party (RP). (Note that OP and RP are the synonyms for IdP and SP, respectively.)