As of October 1^st 2017, access to the web portal of CS OTE as well as the electronic signing in CS OTE will be possible using qualified certificates only. As of July 1^st 2017, it will be possible to register only qualified certificates for accessing the web portal of CS OTE and using electronic signatures. CS OTE users will be enabled to use their current certificates (commercial certificates and OTECA certificates) in the web portal of CS OTE by September 30^th 2017.

This change is based on Regulation (EU) No. 910/2014 of the European Parliament and of the Council (eIDAS) and on Act No. 297/2016 Coll. on trust services for electronic transactions. The qualified certificates in CS OTE are used in compliance with the statement of the Ministry of Interior - available under the following link.

As of July 1^st 2017, until further notice, it will be possible to register qualified system certificates only for an electronic signature in an automatic communication (creation of an electronic mark), until qualified certificates for electronic seals will be available as a replacement for the current system certificates. As of October 1^st 2017, it will not be possible to use commercial certificates to create an electronic mark (automated signature).

For sending encrypted messages to CS OTE through a secured e-mail the original OTECA certificate will be replaced with a commercial certificate by the Market Operator. The new commercial certificate of OTE will be placed on the OTE’s website for download and the users will be informed by the Market Operator in the near future. As of October 1^st 2017, every market participant has to have a commercial certificate to be able to receive encrypted messages from CS OTE through encrypted e-mail.

As of October 1^st 2017, the market participants will have to use a commercial certificate to log in to OTE-COM application. For the electronic signing of data, the same rules must be followed as in case of a web portal, i.e. as of October 1^st 2017, all data must be signed with a qualified certificate only.

The planned change does not affect users who have been already using the qualified certificate for communication with the web portal of CS OTE. A list of certification authorities (CAs) issuing qualified certificates for electronic signature is posted here.

The Market Operator would like to point out that issuing of OTECA certificates, including renewal of certificates, will not be further ensured as of May 1^st 2017.

More information on changes in accessing and electronic signing in CS OTE, including instructions on how to proceed to change certificates in CS OTE:

• Manual for producers.pdf (Czech only)
• Manual for contractual parties containing further information on automatic communication, OTE-COM application and e-mail communication.pdf
• Manual for registration and change of the public part of a certificate in CS OTE.pdf

• Česká pošta (PostSignum) - Změna certifikátu pro výrobce elektřiny - uživatele CS OTE (Czech only)
• I.CA - CHANGE OF COMMUNICATION WITH OTE, A.S.

Supported certificates in CS OTE from October 1, 2017

Changes in certificates from 1st October 2017.pdf (192 KB)