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insider

Definition(s):

  Any person with authorized access to any United States Government resource to include personnel, facilities, information, equipment, networks, or systems.
Source(s):
CNSSI 4009-2015 from CNSSD No. 504

  An entity inside the security perimeter that is authorized to access system resources but uses them in a way not approved by those who granted the authorization.
Source(s):
NIST SP 800-82 Rev. 2 under Insider from RFC 4949
NIST SP 1800-25B under Insider from NIST SP 800-82 Rev. 2, RFC 4949
NIST SP 1800-26B under Insider from NIST SP 800-82 Rev. 2, RFC 4949

  Any person with authorized access to any organizational resource, to include personnel, facilities, information, equipment, networks, or systems.
Source(s):
NIST SP 800-53 Rev. 5 from CNSSI 4009-2015 - Adapted

  Any person with authorized access to business resources, including personnel, facilities, information, equipment, networks, or systems.
Source(s):
NISTIR 7621 Rev. 1 under Insider from CNSSI 4009-2015 - adapted

  Any person with authorized access to any U.S. Government resource, to include personnel, facilities, information, equipment, networks, or systems.
Source(s):
NIST SP 800-53 Rev. 4 [Superseded] under Insider from Presidential Memorandum, National Insider Threat Policy and Minimum Standards for Executive Branch Insider Threat Programs