The prime ministers' discussion of security in the area included hybrid threats and cybersecurity. As an approach to the issue, Ratas suggested a further approximation of the Nordic countries and the Baltic states in a format alike the one that already exists between Estonia and Finland.

Though Estonians and Estonian institutions like to think otherwise, Denmark has been found by the European Commission to be Europe's most advanced digital society in the sum of both private and commercial efforts.

Rasmussen and Ratas also visited the Tapa army base on Sunday, where a Danish contingent is replacing French units in NATO's battle group stationed in Estonia.

Denmark might join NATO cyberdefense center

After the meeting of the prime ministers, Rasmussen said Denmark is seriously considering joining the Tallinn-based NATO Cyber Defense Center of Excellence.

"We also touched on the Tallinn center topic when speaking about cyber dangers. I promised that if discussions over our defense budget have been concluded, then we will make a decision about this. I personally am optimistic about this," Rasmussen said at the press conference following the meeting.

The NATO Cooperative Cyber Defense Center of Excellence is an international competence center, think tank, and training institution accredited by NATO. Founded in 2008, the center has become a significant source of expertise in the field cyber defense for NATO and the member states.

As an independent international organization, the CCD COE focuses on applied research, analyses, training and exercises in the field of cyber defense. Most recently Japan decided to join, as announced by Prime Minister Shinzō Abe on his visit to Estonia on Friday.