The OpenID Connect Federation specification has been updated to incorporate feedback from developers participating in the first OpenID Connect Federation interop event, which was held online in June 2020. The primary change is to use either signed request objects (JAR) or pushed authorization requests (PAR) for client authentication of automatic registration requests. The new draft is published at:

• https://openid.net/specs/openid-connect-federation-1_0-12.html and
• https://openid.net/specs/openid-connect-federation-1_0.html