Interim Approval to Operate

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Abbreviation(s) and Synonym(s):

IATO

Definition(s):

Temporary authorization granted by principal accrediting authority (PAA) or authorizing official (AO) for an information system to process information based on preliminary results of a security evaluation of the system. (To be replaced by ATO and plan of action and milestones (POA&M)) Rationale: Term has been replaced by the term “authorization to operate (ATO)” with conditions.
Source(s):
CNSSI 4009-2015 under interim approval to operate (IATO)

Glossary Comments

Comments about specific definitions should be sent to the authors of the linked Source publication. For NIST publications, an email is usually found within the document.

Comments about the glossary's presentation and functionality should be sent to secglossary@nist.gov.

See NISTIR 7298 Rev. 3 for additional details.

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Information Technology Laboratory

Computer Security Resource Center

Computer Security Resource Center

Interim Approval to Operate

Glossary Comments