AU-10 Non-repudiation. Provide irrefutable evidence that an individual (or process acting on behalf of an individual) has performed [organization-defined]
Non-repudiation. Provide irrefutable evidence that an individual (or process acting on behalf of an individual) has performed [organization-defined].
5
artefacts
0
held by a system
3
at each review
hard
to go live
Policy repository / GRC workspace
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
- Key management evidence showing the signing key is bound to one individual and not shared · Key management / PKI
- Sample signed records with successful verification output · Policy repository / GRC workspace
- Evidence that the signature covers the action content, so the record cannot be altered after signing · Policy repository / GRC workspace
governing documentDocuments that govern the control
- Definition of the actions requiring irrefutable attribution, such as approvals, releases or transmissions · Policy repository / GRC workspace
- The binding mechanism used, for example digital signature over the action and its content · Policy repository / GRC workspace
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
- Shared or role based signing credentials, which defeats attribution to an individual
- Signature covers a hash captured at submission but not the content finally stored
- No retained means to verify old signatures once the certificate expires or is rotated
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 sheetAU-9 Protection of audit information · AU-11 Audit record retention