1. Of classified or sensitive data, the degree to which the data have not been compromised; i.e., have not been made available or disclosed to unauthorized individuals, processes, or other entities. 2. Assurance that information is not disclosed to unauthorized persons, processes, or devices. 3. A property by which information relating to an entity or party is not made available or disclosed to unauthorized individuals, entities, or processes. 3. The prevention of the unauthorized disclosure of information. 4. A security property of an object that prevents:- its existence being known and/or- its content being known. This property is relative to some subject population and to some agreed degree of security. 5. Assurance that information is not disclosed to inappropriate entities or processes. 6. The property that information is not made available or disclosed to unauthorized individuals, entities, or processes. 7. The prevention of the unauthorized disclosure of information. 8. The property that the existence of an object and/or its contents is not made available or disclosed to unauthorized subjects.