restricteddata

Restricted Data (RD) is a United States legal category for information about the design, manufacture, or use of atomic weapons, as well as information about the production of special nuclear material. RD information is classified and controlled by statute to prevent its dissemination, reflecting the national security risks associated with nuclear technologies.

Under the Atomic Energy Act of 1954 (as amended), RD is safeguarded by the Department of Energy in coordination with the Nuclear Regulatory Commission. Access to RD requires an appropriate security clearance, a need-to-know, and is typically restricted through compartmentalization to limit exposure to only those with a legitimate, authorized purpose.

RD is distinct from other classifications of national security information but is treated as highly sensitive. The category also covers records that, if disclosed, could facilitate the development or handling of nuclear weapons or fissile materials. Some records previously designated as RD may be reclassified or declassified; such materials may become Formerly Restricted Data (FRD) under established procedures.

Handling RD involves stringent safeguards, including secure storage, controlled transmission, and strict personnel access controls. Unauthorized possession or disclosure of RD can carry criminal penalties under U.S. law, and requests for RD disclosure are generally denied or heavily redacted in accordance with applicable exemptions and procedures.

Internationally, other countries maintain their own classifications and restrictions for sensitive information related to nuclear technologies. The specific terms, procedures, and legal frameworks vary by jurisdiction.