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  2. Classified information in the United States - Wikipedia

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

    For example, if one piece of information, taken from a secret document, is put into a document along with 100 pages of unclassified information, the document, as a whole, will be secret. Proper rules stipulate that every paragraph will bear a classification marking of (U) for Unclassified, (C) for Confidential, (S) for Secret, and (TS) for Top ...

  3. Classified information - Wikipedia

    en.wikipedia.org/wiki/Classified_information

    Documents and other information must be properly marked "by the author" with one of several (hierarchical) levels of sensitivity—e.g. restricted, confidential, secret, and top secret. The choice of level is based on an impact assessment; governments have their own criteria, including how to determine the classification of an information asset ...

  4. Sensitive but unclassified - Wikipedia

    en.wikipedia.org/wiki/Sensitive_but_unclassified

    Sensitive Security Information (SSI) is a category of sensitive but unclassified information under the United States government's information sharing and control rules, often used by TSA and CBP. SSI is information obtained in the conduct of security activities whose public disclosure would, in the judgment of specified government agencies ...

  5. Sensitive compartmented information - Wikipedia

    en.wikipedia.org/wiki/Sensitive_compartmented...

    Sensitive compartmented information (SCI) is a type of United States classified information concerning or derived from sensitive intelligence sources, methods, or analytical processes. All SCI must be handled within formal access control systems established by the Director of National Intelligence. [1]

  6. NSA encryption systems - Wikipedia

    en.wikipedia.org/wiki/NSA_encryption_systems

    NSA has to deal with many factors in ensuring the security of communication and information (COMSEC and INFOSEC in NSA jargon): Confidentiality: making sure messages cannot be read by unauthorized parties. Authentication: the validation of the source of transmitted messages. Nonrepudiation: making sure that transmitted messages cannot be forged.

  7. Government Security Classifications Policy - Wikipedia

    en.wikipedia.org/wiki/Government_Security...

    The GSCP uses three levels of classification: OFFICIAL, SECRET and TOP SECRET. [2] This is simpler than the old model and there is no direct relationship between the old and new classifications. "Unclassified" is deliberately omitted from the new model. Government bodies are not expected to automatically remark existing data, so there may be ...

  8. Special access program - Wikipedia

    en.wikipedia.org/wiki/Special_access_program

    Special access programs (SAPs) in the U.S. Federal Government are security protocols that provide highly classified information with safeguards and access restrictions that exceed those for regular (collateral) classified information. SAPs can range from black projects to routine but especially-sensitive operations, such as COMSEC maintenance ...

  9. Classified Information Procedures Act - Wikipedia

    en.wikipedia.org/wiki/Classified_Information...

    The Classified Information Procedures Act or CIPA (Pub. L. Tooltip Public Law (United States) 96–456, 94 Stat. 2025, enacted October 15, 1980 through S. 1482) is codified as the third appendix to Title 18 of the U.S. Code, the title concerning crimes and criminal procedures.