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  2. Restricted Data - Wikipedia

    en.wikipedia.org/wiki/Restricted_Data

    In this way, a document, for instance, could be classified as "Secret" (S), "Secret//Restricted Data" (S//RD), or "Secret//Restricted Data-Critical Nuclear Weapon Design Information" (S//RD-CNWDI) depending on the type of information a document contains. Formerly Restricted Data (FRD) is a category also designated in the Atomic Energy Act of ...

  3. Classified information in the United States - Wikipedia

    en.wikipedia.org/wiki/Classified_information_in...

    Restricted Data (RD) and Formerly Restricted Data (FRD) are classification markings that concern nuclear information. These are the only two classifications that are established by federal law, being defined by the Atomic Energy Act of 1954. Nuclear information is not automatically declassified after 25 years.

  4. List of U.S. security clearance terms - Wikipedia

    en.wikipedia.org/wiki/List_of_U.S._security...

    SCI information may be either Secret or Top Secret, but in either case it has additional controls on dissemination beyond those associated with the classification level alone. In order to gain SCI Access, one would need to have a Single Scope Background Investigation (SSBI). Compartments of information are identified by code words. This is one ...

  5. Q clearance - Wikipedia

    en.wikipedia.org/wiki/Q_clearance

    Q clearance or Q access authorization is the U.S. Department of Energy (DOE) security clearance required to access Top Secret Restricted Data, Formerly Restricted Data, and National Security Information, as well as Secret Restricted Data. Restricted Data (RD) is defined in the Atomic Energy Act of 1954 and covers nuclear weapons and related ...

  6. Classified information - Wikipedia

    en.wikipedia.org/wiki/Classified_information

    The original overall classification of the page, "top secret", and the Special Intelligence code word "umbra", are shown at top and bottom. The classification of individual paragraphs and reference titles is shown in parentheses—there are six different levels on this page alone.

  7. Security clearance - Wikipedia

    en.wikipedia.org/wiki/Security_clearance

    After the United States entered into World War II, Britain changed its security classifications to match those of the U.S..Previously, classifications had included the top classification "Most Secret", but it soon became apparent that the United States did not fully understand the UK's classifications, and classified information appeared in the U.S.'s press.

  8. Special access program - Wikipedia

    en.wikipedia.org/wiki/Special_access_program

    It drops the "restricted" classification level. It removes classification authority from 28 government entities and limits its use in 17 more. There are now explicit guidelines for the remaining three classification levels to prevent a systematic flood of classified documents coming from the Pentagon and other agencies. The Pentagon responds by ...

  9. Sensitive but unclassified - Wikipedia

    en.wikipedia.org/wiki/Sensitive_but_unclassified

    PARD (Protect as restricted data) is an unclassified but sensitive marking used in the Department of Energy. It is the marking that was on Dr. Wen Ho Lee's program codes at Los Alamos National Laboratory. He (and many other scientists) backed up such data to tape.