Technical announcements

31.10.2025

Information

We would like to inform you that November 10th and 11th 2025 (Monday and Tuesday) will be non-working days at Certum. On that day, orders and shipments will not be processed, and our helpline will be unavailable. We encourage you to contact us or place your orders on another date.

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

Information

Sunsetting the clientAuth EKU from Certum SSL/TLS certificates

Certum implements new Root CAs