AC-22

Requirement
1. Designate individuals authorized to make information publicly accessible;
2. Train authorized individuals to ensure that publicly accessible information does not contain nonpublic information;
3. Review the proposed content of information prior to posting onto the publicly accessible system to ensure that nonpublic information is not included; and
4. Review the content on the publicly accessible system for nonpublic information [Assignment: organization-defined frequency] and remove such information, if discovered.

Discussion

In accordance with applicable laws, executive orders, directives, policies, regulations, standards, and guidelines, the public is not authorized to have access to nonpublic information, including information protected under the PRIVACT and proprietary information. Publicly accessible content addresses systems that are controlled by the organization and accessible to the public, typically without identification or authentication. Posting information on non-organizational systems (e.g., non-organizational public websites, forums, and social media) is covered by organizational policy. While organizations may have individuals who are responsible for developing and implementing policies about the information that can be made publicly accessible, publicly accessible content addresses the management of the individuals who make such information publicly accessible.

NIST 800-53A Assessment Guidance

Examine

[SELECT FROM: Access control policy; procedures addressing publicly accessible content; list of users authorized to post publicly accessible content on organizational systems; training materials and/or records; records of publicly accessible information reviews; records of response to non-public information on public websites; system audit logs; security awareness training records; system security plan; other relevant documents or records].

Interview

[SELECT FROM: Organizational personnel with responsibilities for managing publicly accessible information posted on organizational systems; organizational personnel with information security responsibilities].

Test

[SELECT FROM: Mechanisms implementing management of publicly accessible content].

ID	Assessment Objectives
AC-22a.	designated individuals are authorized to make information publicly accessible;
AC-22b.	authorized individuals are trained to ensure that publicly accessible information does not contain non-public information;
AC-22c.	the proposed content of information is reviewed prior to posting onto the publicly accessible system to ensure that non-public information is not included;
AC-22d.[01]	the content on the publicly accessible system is reviewed for non-public information <AC-22_ODP frequency>;
AC-22d.[02]	non-public information is removed from the publicly accessible system, if discovered.

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