AC-22: PUBLICLY ACCESSIBLE CONTENT

TAILORED FOR INDUSTRIAL CONTROLS

• ICS Control Baselines:

• Low
• Moderate
• High

• a. Designates individuals authorized to post information onto a publicly accessible information system;
• b. Trains authorized individuals to ensure that publicly accessible information does not contain nonpublic information;
• c. Reviews the proposed content of information prior to posting onto the publicly accessible information system to ensure that nonpublic information is not included; and
• d. Reviews the content on the publicly accessible information system for nonpublic information [Assignment: organization-defined frequency] and removes such information, if discovered.

SUPPLEMENTAL GUIDANCE

In accordance with federal laws, Executive Orders, directives, policies, regulations, standards, and/or guidance, the general public is not authorized access to nonpublic information (e.g., information protected under the Privacy Act and proprietary information). This control addresses information systems that are controlled by the organization and accessible to the general public, typically without identification or authentication. The posting of information on non-organization information systems is covered by organizational policy.

ICS SUPPLEMENTAL GUIDANCE

TGenerally, public access to ICS systems is not permitted. Selected information may be transferred to a publicly accessible information system, possibly with added controls (e.g., introduction of fuzziness or delay).

CONTROL ENHANCEMENTS

NO CONTROL ENHANCEMENTS

REFERENCES:

• NIST Special Publication 800-82 | GUIDE TO INDUSTRIAL CONTROL SYSTEMS (ICS) SECURITY