AC-20 Use of External Systems
Sets the terms under which organizational information may be processed on supplier and provider systems, and verifies them.
3
artefacts
0
held by a system
1
at each review
hard
to go live
Vendor register / contract 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
- Verification evidence such as assessment or attestation · Vendor register / contract repository
governing documentDocuments that govern the control
- Inventory of external systems used by suppliers for organizational data · Vendor register / contract repository
- Agreements setting the security terms · 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
- supplier subcontracts processing with no notification
- terms agreed but never verified
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 sheetAC-19 Access Control for Mobile Devices · AC-21 Information Sharing