1. A condition that results from the establishment and
maintenance of protective measures that ensure a state of inviolability from hostile acts or influences. [
JP1]
2. With respect to classified matter, the condition that prevents unauthorized persons from having
access to official
information that is safeguarded in the interests of national security. [After
JP1]
3. Measures taken by a military unit, an activity or installation to protect itself against all acts designed to, or which may, impair its effectiveness. [
JP1]