Revision as of 02:53, 15 January 2026

ATO

The official management decision issued by a designated accrediting authority (DAA) or principal accrediting authority (PAA) to authorize operation of an information system and to explicitly accept the residual risk to agency operations (including mission, functions, image, or reputation), agency assets, or individuals.

Source: CNSSI 4009-2015 | Category:

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