After Sectigo terminated the contract with GÉANT (European research and education network) unscheduled as of 01/2025, a new provider was found. DFN has commissioned HARICA, an established trust service provider from Greece, to provide browser-based certificates. HARICA is part of the Greek university network GUnet and has been supported in all operating systems and web browsers for many years. The IT department of the HWR will announce the necessary steps for using this service at the beginning of February.