Need-To-Know

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International Definitions

IAEA

Need to know is
(1) A rule by which individuals, processes, and systems are granted access to only the information, capabilities and assets which are necessary for execution of their authorized functions.
(2) A principle under which users, processes and systems are granted access to only the information, capabilities and assets which are necessary for execution of their authorized functions. [1]



National Definitions

United States

NIST
Need-to-know (NTK) is a method of isolating information resources based on a user's need to have access to that resource in order to perform their job but no more. [2]

The terms ‘need-to know” and “least privilege” express the same idea. Need-to-know is generally applied to people, while least privilege is generally applied to processes.

DoD
Need to know is a criterion used in security procedures that requires the custodians of classified information to establish, prior to disclosure, that the intended recipient must have access to the information to perform his or her official duties (source: JP 2-01.2) [3]




See also

Notes