7 COMMUNICATION AND INFORMATION SYSTEM CAPABILITIES AND CYBER SECURITY The importance and role of the capabilities of the communication and information system as one of the key elements affecting the operation and development of defence capacity are constantly growing, due to the intensified digitalization of processes and weapon systems, and the establishment of cyberspace as a domain for military operations. In parallel with the above, advanced computer technologies have inexorably changed both the theatre of war and the methods of military operations and defence processes. Cyber attacks on both state and non-state actors are growing in number, and becoming more aggressive and sophisticated. The defence system in cyberspace follows the norms and rules of operations in accordance with international law. The applicable international law, rules and norms for the responsible conduct of states in cyberspace are an important factor for reducing risks, preventing conflicts, and establishing trust and stability in international relations. The most important objective of the establishment of the capabilities of the defence system’s communication and information system will be to ensure adaptability and interoperability of timely, accurate and comprehensive data in real time which are necessary for the effectiveness of the defence system and 33