DFN-AAI Identity Federation — University of Bonn Shibboleth IdP
The University of Bonn operates its own SAML 2.0 / Shibboleth Identity Provider and publishes signed metadata from its own host — https://shibboleth.uni-bonn.de/idp/shibboleth returned 200 application/xml, 12,145 bytes, on 2026-09-01, entityID https://shibboleth.uni-bonn.de/idp/shibboleth, OrganizationName "Rheinische Friedrich-Wilhelms-Universitaet Bonn". The same entity is registered in DFN-AAI, the German national research-and-education identity federation: the 112,936,662-byte aggregate at https://mdq.aai.dfn.de/entities/ carries 11,457 EntityDescriptors and exactly ONE uni-bonn.de entity — this IdP — with registrationAuthority https://www.aai.dfn.de, mdui:DisplayName "Universitaet Bonn", shibmd:Scope uni-bonn.de, entity attributes DFN-AAI-IdP and http://aai.dfn.de/category/idm.nrw-member, and a valid XML signature. Per-entity MDQ lookup answers 200 application/samlmetadata+xml. SSO is bound over HTTP-POST, HTTP-POST-SimpleSign and HTTP-Redirect; SLO adds SOAP; an ArtifactResolutionService runs on port 8443. This is the strongest institution-operated machine-readable surface Bonn has and it was absent from the June 2026 profile.