2894 security of cyberspace, whether public or private. At the same time, it promotes Portugal's international action, both bilaterally and multilaterally, in order to deepen the solid network of existing alliances, to exert influence by affirming its presence in the world and empowering others through strategic partnerships, namely between Portuguese speaking countries, thereby actively contributing to shaping the international ecosystem while safeguarding the national interest. Additionally, it is important to characterize the national participation in the various cyber defence activities in the international context in which Portugal operates, which allow the aggregation of knowledge and experience, also enabling the national affirmation in this field. Therefore, within this axis the following lines of action shall be adopted: Contribute to the regulation and universalization of the cyberspace by promoting the respect for the applicable international law, the transparent sharing of its governance among all actors, their universal accessibility and the dissemination of good usage practices; Deepen the national participation in the relevant bodies, organisations and agencies, in particular of the United Nations, the European Union and the North Atlantic Treaty Organization. It should also deepen national participation in the Organization for Security and Cooperation in Europe, in particular in the effort to reduce the risk of inter-state tensions within cyberspace security; Participate in cybersecurity and cyber defence exercises by strengthening and increasing the level of maturity for cyberspace protection, where sharing information and knowledge is a key factor; Integrate international cyber security and cyber defence organizations with a view to international cooperation and the affirmation of Portugal in this field; Deepen the coordination and cooperation between the various national entities responsible for cyberspace security, with a view to better alerting and responding to threats; Deepen the articulation between the National Cybersecurity Centre and ANACOM — National Communications Authority, as well as between the first and the entities that compose the State Electronic Certification System within the scope of their respective attributions; Develop the international cyber-discipline framework in which Portugal should be inserted, identifying priority initiatives, namely the international or intergovernmental organizations for the exchange of good practices to which it should adhere. 6 — Strategy Evaluation and Review This Strategy shall be subject to an annual review by the National Cybersecurity Council. Such an assessment shall include a verification of the strategic objectives and action plan and their adequacy to changing circumstances. On the other hand, the rapid intrinsic evolution of cyberspace requires this Strategy to be regularly and periodically revised, considering that, without prejudice to extraordinary revising processes when required by the circumstances, it should take place within a maximum of five years. Portuguese Official Journal, Series 1 — No. 108 — 5 June, 2019