Technical announcements

16.03.2026

Maintenance Work on the CertumSign Service

Please be advised that maintenance work will be performed on the CertumSign platform. As a result, it will not be possible to log in to the CertumSign service from 8:00 PM on Friday, March 20, 2025, until 6:00 AM on Monday, March 23, 2025.

21.10.2025

Sunsetting the clientAuth EKU from Certum SSL/TLS certificates

From October 2025, the SSL/TLS certificate industry is undergoing a significant change – public SSL/TLS certificates will no longer include the Extended Key Usage (EKU) TLS Web Client Authentication (clientAuth) extension. This certificate extension allowed a single SSL/TLS certificate to be used for both server and client authentication in mutual TLS (mTLS) scenarios.

13.08.2025

Certum implements new Root CAs

From September 15, 2025, Certum will implement new Root CAs in accordance with Mozilla’s and Google’s policies.

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Electronic signature activation

Electronic signature renewal

Technical announcements

Maintenance Work on the CertumSign Service

Sunsetting the clientAuth EKU from Certum SSL/TLS certificates

Certum implements new Root CAs