Trust services



A trust service, according to the Regulation No 910/2014 of the European Parliament and of the Council on electronic identification and trust services for electronic transactions in the internal market (eIDAS Regulation), means the electronic service for the:

  • execution, authentication and validation of electronic signatures, electronic seals or electronic time stamps,
  • execution, authentication and validation of certificates for the authentication of websites,
  • storage of electronic signatures, seals or certificates related to these services.

A qualified trust service is a trust service that meets the applicable requirements set out in the eIDAS Regulation.

Trust information published by the EU Commission:

WARNING for owners of chip cards Siemens (ATOS) version CardOSv4.4

Please note that qualified certificates issued by the Slovak National Certification Authority on chip cards Siemens (ATOS) version CardOSv4.4 will be canceled on the 16th of December 2021.


According to Article 19 (1) and (2) of Regulation (EU) No 910/2014 and based on guidance received from the National Security Authority, as a body overseeing qualified trust service providers, the operator of qualified trust services is obliged to notify any changes when providing their qualified trust services to all customers and reliant parties. In the sense of the above the Slovak National Certification Authority informs about the fact that the chip cards Siemens (ATOS) version CardOSv4.4 certification expires on the 15th of December 2021.

According to Act no. 272/2016 Coll. on Trust Services Providers are obliged to secure that the issued qualified certificate will contain accurate, true and complete data. All subjects and owners of chip cards Siemens (ATOS) version CardOSv4.4 with valid qualified mandate certificate for electronic signature, or qualified certificate for electronic seal, which validity exceeds date 15th of December 2021, will have these certificates canceled. National Agency for Network and Electronic Services (NASES) has been providing information on the approaching expiration of the certificates of the mentioned chip cards to clients applying for the issue of new certificates since January 2021.

Subjects and owners of these types of chip cards are recommended to apply in advance for new qualified certificates to ensure that qualified certificates are issued within standard procedure applicable to the issue of the certificate on another device for making qualified electronic signatures or seals.

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