In providing cyber security, the objective of the Internal Security Service is to identify cyber-attacks that could have been initiated by a foreign state or may threaten national security. The Information System Authority, the Estonian Information Board and the Police and Border Guard Board play an important role in the national cyber security community.
ISS doesn’t have much to inform us about. The section “Cyber Security” on page 22 and 23 contains mainly compilation of cyber security best practices.
Defacement and denial-of-service attacks can also become parts of sending a message to the enemy, i.e. influence operations. Some Estonian websites were defaced with Daesh symbols and messages in 2015. Although this was part of a global marketing campaign, it could also be regarded as a message to Estonian society.