U

Glossary U
Unauthorized Access

Unauthorized Access

A person gains logical or physical access without permission to a network, system, application, data, or other resource. See NIST SP 800-82 Rev. 2 under Unauthorized ...

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Unauthorized Disclosure

Unauthorized Disclosure

An event involving the exposure of information to entities not authorized access to the information. See the following under under Unauthorized disclosure for more information:NIST ...

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Unclassified

Unclassified

Information that does not require safeguarding or dissemination controls pursuant to Executive Order (E.O.) 13556 (Controlled Unclassified Information) and has not been determined to require ...

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UEFI

UEFI

Unified Extensible Firmware Interface (UEFI)A possible replacement for the conventional BIOS that is becoming widely deployed in new x86-based computer systems. The UEFI specifications were ...

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Uninterruptible Power Supply

Uninterruptible Power Supply

A device with an internal battery that allows connected devices to run for at least a short time when the primary power source is lost. ...

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URL

URL

Uniform Resource LocatorA uniform resource locator, or URL, is a short string containing an address which refers to an object in the "web." URLs are ...

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User

User

An individual (person), organization, device, or process. Used interchangeably with “party”. See the following under Entity for more information: NIST SP 800-56A Rev. 2.  NIST SP 800-56B Rev. ...

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User ID

User ID

Unique symbol or character string used by an information system to identify a specific user. 

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