Changes in the security environment, affecting both internal and external security, have been rapid in recent times. Security challenges related to hybrid phenomena, cybersecurity and organized cross-border crime significantly influence the development of the security environment. Global interdependence contributes to the nature of security, e.g., within the EU the free movement of goods and people have increased interdependence. The importance of situational awareness created and shared jointly by security actors is based on up-to-date information and assessments. Seamless cross-administrative collaboration promotes situational awareness (SA) and real-time situation picture. Thus, situational awareness is important for decision-making at different levels in various operating environments. Preparing for threats in accordance with the principle of total security is to safeguard the vital functions of society through cooperation between authorities, business, organizations, and citizens. Preparedness is a matter of comprehensive security and the vital functions in society involve cooperation between authorities, organizations, and citizens. As the operational environment is constantly changing, it has become increasingly difficult to distinguish between internal and external security and responding to changing threats may require revisions in policies and practices, and improved cooperation between actors. Significant changes in security situations may require addressing jurisdiction for security authorities and other actors, as jurisdiction is always based on the law. Effective cooperation between authorities requires responsible management, confidentiality, and appropriate allocation of resources. On an individual level, commitment, cooperative spirit, and personal contacts become critical to the success of collaborative work. The Common Operational Picture (COP) is a tool for achieving a good level of situational awareness, which in turn requires improved decision-making abilities and precise responses to situations that may arise. Positive developments are taking place in the field of information systems and information exchange between authorities. As threats change, so should the policies of states’ internal and external security authorities be considered, also requiring reviewing the competences of these authorities, and how national legislation enables the security authorities to act in the face of possible threats. [ABSTRACT FROM AUTHOR]