Dictionary · NIST SP 800-47

A record showing who has accessed an Information Technology (IT) system and what operations the user has performed during a given period.

A basic unit of information that has a unique meaning and subcategories (data items) of distinct value. Examples of data elements include gender, race, and geographic location.

The termination of an interconnection between two or more IT systems. A disconnection may be planned (e.g., due to changed business needs) or unplanned (i.e., due to an attack or other contingency).

The process of verifying the identity of a user, process, or device, usually as a prerequisite for granting access to resources in an IT system.

An agreement established between the organizations that own and operate connected IT systems to document the technical requirements of the interconnection. The ISA also supports a Memorandum of Understanding or Agreement (MOU/A) between the organizations.

A document established between two or more parties to define their respective responsibilities in accomplishing a particular goal or mission. In this guide, an MOU/A defines the responsibilities of two or more organizations in establishing, operating, and securing a system interconnection.

The direct connection of two or more IT systems for the purpose of sharing data and other information resources.