Ensuring security is one of the key aspects of most states' policies. The current global security situation forces states to address this issue even more than before. Each state creates its security components, following its economy, personnel, and other possibilities, as well as by the approach it chooses to ensure security. At the same time, the involvement of citizens proves to be necessary, the question is only the degree of how this involvement will be carried out by individual states. This possible involvement is influenced by many aspects, which include citizens' trust in the state, economic and technical possibilities of the state, but also the generally accepted view of the functioning of the given state by its citizens. This contribution attempts to find key aspects for the functioning of the so-called co-created security, which can be understood as the organized, deliberate involvement of citizens under the patronage of professional security forces. In this sense, co-created security is a certain contrast to the spontaneous establishment of paramilitary organizations, militias, and other entities that try to ensure security outside the official system, usually not by law.