Answer:
Security seems to indicate a state or a feeling of absence of danger now and in the future, for oneself and one's own property and for one they have responsibility for, or have compassion for. In other words, it is being aware that a certain action will not cause future harm. The assumption of knowledge is fundamental from an epistemological point of view, since a system can evolve without giving rise to unwanted states, but it cannot be considered safe for this. Only scientific knowledge, therefore based on repeatable observations, can guarantee a sensible security assessment.
Total security is obtained in the absence of dangers. In an absolute sense, this is a concept that is difficult to translate into real life even if the application of security regulations makes the occurrence of harmful events and accidents more difficult and always translates into a better quality of life.