SC-37 Out-of-Band Channels
Maintains out-of-band channels for the information and credentials that must not travel the same path as the thing they protect.
3
artefacts
0
held by a system
1
at each review
hard
to go live
Document repository
where the evidence lives
teal = a system already holds it · olive = produced at each review
system holds itEvidence a system already holds
none for this control
periodic reviewEvidence produced at each review
- Evidence of use · Document repository
governing documentDocuments that govern the control
- Identification of information requiring out-of-band handling · Document repository
- Channel arrangements including with suppliers · Vendor register / contract repository
First move
This control is evidenced by people and documents, not systems. Put the document under version control with an owner and review date, and log each review as a record with reviewer and date. Do not try to automate it.
Common gaps auditors find
- verification data sent by the same channel as the delivery it verifies
- out-of-band channel provided by the same supplier
Do this for your whole sheet
Paste the rows you run your controls from and get this mapping for every control at once, with the periodic-review ones flagged and a first move per row. No account for the first run.
Build my evidence sheetSC-36 Distributed Processing and Storage · SC-38 Operations Security