Restricted Data includes information about which of the following?

Restricted Data specifically refers to information that is closely tied to national security, particularly in the context of nuclear energy and weapons. This classification is applicable to data related to the operational theory of nuclear weapons, as it encompasses sensitive aspects regarding their design, construction, and functioning.

Understanding this classification is crucial within the field of personnel security, as it emphasizes the importance of safeguarding critical national defense information. While the environmental impact of nuclear energy, renewable energy production processes, and public safety measures are significant topics, they do not fall under the Restricted Data category. They are generally considered less sensitive and are often available in public forums or subject to different regulatory protections. Therefore, the operational theory of nuclear weapons is the focal point of Restricted Data, underscoring the core principle of protecting national security interests through stringent information control.