id: "AC-04(07)" title: "One-way Flow Mechanisms" family: "AC" family_name: "Access Control" sort_id: "ac-04.07" priority: "P1" implementation_level: "system" parent: "AC-04" enhancement: True
Statement
Enforce one-way information flows through hardware-based flow control mechanisms.
Guidance
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
one-way information flows are enforced through hardware-based flow control mechanisms.
Access control policy
information flow control policies
procedures addressing information flow enforcement
system design documentation
system configuration settings and associated documentation
system hardware mechanisms and associated configurations
system audit records
system security plan
other relevant documents or records
System/network administrators
organizational personnel with information security responsibilities
system developers
Hardware mechanisms implementing information flow enforcement policy