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    Glossary
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controlled interface

Definitions:

  A boundary with a set of mechanisms that enforces the security policies and controls the flow of information between interconnected information systems.
Sources:
CNSSI 4009-2015
NIST SP 800-137 under Controlled Interface from CNSSI 4009

  An interface to a system with a set of mechanisms that enforces the security policies and controls the flow of information between connected systems.
Sources:
NIST SP 800-53 Rev. 5