Information that could be used by an adversary to harm the U.S. or its allies and thus must be protected. The NRC has two types of classified information. The first type, known as national security information, is information that is classified by an Executive Order. Its release would damage national security to some degree. The second type, known [..]

Classified information refers to any information protected against unauthorized disclosure and restricted distribution in the interests of national security. All persons with authorized access to clas [..]

information related to the national interest that may qualify for an exemption or exclusion under the Access to Information Act or Privacy Act and the compromise of which would reasonably be expected [..]

Information that an original classification authority determines the unauthorized disclosure of which reasonably could be expected to result in damage to the national security, which includes defense against transnational terrorism, and the original classification authority is able to identify or describe the damage. Classified information may be p [..]

See the definition for classified national security information (USAID Automated Directives System - ADS - Chapters 562, 566, 567, 568).