Computer Security Resource Center

Computer Security Resource Center

Computer Security
Resource Center

Glossary

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Approval To Operate (C.F.D.)

Acronym(s):
ATO
Definition(s):

  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(s): CNSSI 4009-2015

Synonym(s):

None

See Also: