1. A part of a database management system that provides a centralized repository of information about data in a database, such as meaning, relationship to other data.
2. An inventory that describes, defines, and lists all of the data elements that are stored in a database.

An inventory that specifies the source, location, ownership, usage, and destination of all of the data elements that are stored in a database.

A single unit of data that in a certain context is considered indivisible. It cannot be decomposed into more fundamental segments of data that have useful meanings with the business.

[A] cryptographic algorithm for the protection of unclassified computer data and published by the National Institute of Standards and Technology in Federal Information Processing Standard Publication 46-1. [INFOSEC-99]
Note: DES is not approved for protection of national security classified information.

Synonyminformation flow control.

A device that (a) receives data from one data link and retransmits data representing the same information, using proper format and link protocols, to another data link and (b) may forward data between (a) links that are identical, i.e., TADIL B to TADIL B, (b) links that are similar, i.e., TADIL A to TADIL B, or (c) links that are… (Read More →)

A presentation unit of the data channel; a defined group of consecutive data bits. The preferred number of bits in a data frame depends on the application for the data channel. [T1.80
1. 04-1997]

1. [The] condition existing when data is unchanged from its source and has not been accidentally or maliciously modified, altered, or destroyed. [INFOSEC-99]
2. The condition in which data are identically maintained during any operation, such as transfer, storage, and retrieval.
3. The preservation of data for their intended use.
4. Relative to specified operations, the a priori expectation of… (Read More →)

1. A named component of a data element; usually the smallest component.
2. A subunit of descriptive information or value classified under a data element. For example the data element "military personnel grade" contains data items such as sergeant, captain, and colonel. [JP 1-02]

A cryptographic key used for authentication or for encryption and decryption. [After X9.17]