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  2. Classified information in the United States - Wikipedia

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

    The United States has three levels of classification: Confidential, Secret, and Top Secret. Each level of classification indicates an increasing degree of sensitivity. Thus, if one holds a Top Secret security clearance, one is allowed to handle information up to the level of Top Secret, including Secret and Confidential information. If one ...

  3. NSA encryption systems - Wikipedia

    en.wikipedia.org/wiki/NSA_encryption_systems

    Fourth generation systems (1990s) use more commercial packaging and electronic key distribution. Integrated circuit technology allowed backward compatibility with third generation systems. Security tokens, such as the KSD-64 crypto ignition key (CIK) were introduced. Secret splitting technology allows encryptors and CIKs to be treated as ...

  4. Sensitive compartmented information - Wikipedia

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

    All SCI must be handled within formal access control systems established by the Director of National Intelligence. [1] SCI is not a classification; SCI clearance has sometimes been called "above Top Secret", [2] but information at any classification level may exist within an SCI control system. When "decompartmentalized", this information is ...

  5. SIPRNet - Wikipedia

    en.wikipedia.org/wiki/SIPRNet

    SIPRNet is the secret component of the Defense Information Systems Network. [2] Other components handle communications with other security needs, such as the NIPRNet, which is used for nonsecure communications, and the Joint Worldwide Intelligence Communications System (JWICS), which is used for Top Secret communications.

  6. NSA cryptography - Wikipedia

    en.wikipedia.org/wiki/NSA_Cryptography

    A Type 1 Product refers to an NSA endorsed classified or controlled cryptographic item for classified or sensitive U.S. government information, including cryptographic equipment, assembly or component classified or certified by NSA for encrypting and decrypting classified and sensitive national security information when appropriately keyed.

  7. Sensitive compartmented information facility - Wikipedia

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

    A sensitive compartmented information facility (SCIF / s k ɪ f /), in United States military, national security/national defense and intelligence parlance, is an enclosed area within a building that is used to process sensitive compartmented information (SCI) types of classified information.