The basis for this service is still the DFN-PKI service of the DFN. The new version of this service is based on the TCS offer of GÉANT, which is currently provided by Sectigo through their service Sectigo Certificate Manager (SCM).
This results in two changes:
1.) The web interface for requesting certificates, is now protected by the TU-wide known single sing-on login.
2.) In addition to the well-known web interface, certificates can now also be issued via the ACME protocol.