SI-20 Tainting
Uses tainting techniques so that unauthorized exfiltration of organizational information through the supply chain can be detected.
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
- Records of any detections and response · Document repository
governing documentDocuments that govern the control
- Tainting approach and where it is applied · Document repository
- Detection arrangements · Document 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
- technique described but never deployed
- no detection route for tainted data if it surfaces
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 sheetSI-12 Information Management and Retention · SR-1 Policy and Procedures