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authorization to operate (ATO)

Abbreviation(s) and Synonym(s):

ATO
security authorization (to operate)
Security Authorization (to Operate)
Security Authorization(to Operate)

Definition(s):

  The official management decision given by a senior organizational official to authorize operation of an information system and to explicitly accept the risk to organizational operations (including mission, functions, image, or reputation), organizational assets, individuals, other organizations, and the Nation based on the implementation of an agreed-upon set of security controls.
Source(s):
CNSSI 4009-2015 NIST SP 800-53 Rev. 4, NIST SP 800-53A Rev. 1, NIST SP 800-37 Rev. 1
NIST SP 800-137 under Authorization (to operate) CNSSI 4009
NIST SP 800-161 under Authorization (to operate) NIST SP 800-53 Rev. 4
NIST SP 800-30 Rev. 1 under Authorization (to operate) CNSSI 4009
NIST SP 800-37 Rev. 1 under Authorization (to operate)
NIST SP 800-53 Rev. 4 under Authorization (to operate)
NIST SP 800-39 under Authorization(to operate)
NIST SP 800-53 Rev. 4 under Authorization(to operate)

  See authorization to operate (ATO).
Source(s):
CNSSI 4009-2015 under security authorization (to operate) NIST SP 800-37 Rev. 1

  See Authorization (to operate).
Source(s):
NIST SP 800-30 Rev. 1 under Security Authorization (to Operate)
NIST SP 800-39 under Security Authorization(to Operate)

  Authorization to Operate; One of three possible decisions concerning an issuer made by a Designated Authorizing Official after all assessment activities have been performed stating that the issuer is authorized to perform specific PIV Card and/or Derived Credential issuance services.
Source(s):
NIST SP 800-79-2 under ATO

  The official management decision given by a senior Federal official or officials to authorize operation of an information system and to explicitly accept the risk to agency operations (including mission, functions, image, or reputation), agency assets, individuals, other organizations, and the Nation based on the implementation of an agreed-upon set of security and privacy controls. Authorization also applies to common controls inherited by agency information systems.
Source(s):
NIST SP 800-37 Rev. 2 under authorization to operate

  The official management decision given by a senior organizational official to authorize operation of an information system and to explicitly accept the risk to organizational operations (including mission, functions, image, or reputation), organizational assets, individuals, other organizations, and the Nation based on the implementation of an agreed-upon set of security controls and privacy controls.
Source(s):
NIST SP 800-53A Rev. 4 under Authorization (to operate) NIST SP 800-37 - Adapted