AC-4(4) Information flow | flow control of encrypted information
What the standard requires
Prevent encrypted information from bypassing [information flow control mechanisms] by [decrypting the information | blocking the flow of the encrypted information | terminating communications sessions attempting to pass encrypted information | [organization-defined procedure or method] ].
Quoted verbatim from NIST SP 800-53 Rev 5 (OSCAL catalog), which is in the public domain.
Cross-framework mappings
No cross-framework mapping is seeded for this control. That is stated rather than filled in: a mapping nobody authored is worse than a gap you can see.
Track AC-4(4) with evidence behind it
In CMDash this control is a row with an owner, a status, uploaded evidence kept with its full history, and an export an assessor can read.