About SK

AS Sertifitseerimiskeskus (Certification Center) was founded in 2001 and is Estonia's primary and currently the only certification authority (CA). We offer certification and time-stamping services, as well as develop and operate the software required to use these services. Since the end of 2016, the company’s new business name is SK ID Solutions AS (SK).

Our main business:

  • offering certification and time-stamping service;
  • developing technology and applications for digital signing;
  • offering validation services.

As the partner of the Estonian state, SK issues certificates for authentication and digital signing to national identity documents (ID-card, Mobile-ID, Digi-ID, residence permit card and e-resident's Digi-ID). In addition, SK provides certification service within electronic tachograph project in Denmark. 

SK has developed necessary software for using ID-card, including DigiDoc software, which enables to give digital signatures, check the validity of signatures and encrypt data.

Founders and owners of SK are Swedbank, SEB and Telia Eesti.

Read more about our story here.

Watch the video introducing SK.

SK is currently offering its services, incl. involvement in R&D projects across the Baltics. Our customers include the Estonian court system and notaries, Central Bank and commercial banks, enforcement organisations (e.g. Police) and many others.

We are contributing the results of our work on digital signatures to the international digital signature community as an open user group, open source project available at Visit the site to learn more.

Where to go from here?