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Revision as of 02:53, 15 January 2026

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External information system service

A system service that is implemented outside of the authorization boundary of the organizational system (i.e., a service that is used by but not a part of the organizational system) and for which the organization typically has no direct control over the application of required security controls or the assessment of security control effectiveness.


Source: NIST SP 800-171r3 | Category: