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AC-04(07) One-way Flow Mechanisms

NIST SP 800-53 (controls) 5.2.0 against 5.2.0
All changes in this version
unchanged AC part of AC-4

Title

One-way Flow Mechanisms

Control

Enforce one-way information flows through hardware-based flow control mechanisms.

Discussion

One-way flow mechanisms may also be referred to as a unidirectional network, unidirectional security gateway, or data diode. One-way flow mechanisms can be used to prevent data from being exported from a higher impact or classified domain or system while permitting data from a lower impact or unclassified domain or system to be imported.

Assessment objective

AC-04(07) one-way information flows are enforced through hardware-based flow control mechanisms.

STIG rules that implement this control 0

No followed STIG rule cites a CCI indexed to this control (CCI list 2026-07-14).