SC-29 Heterogeneity. Employ a diverse set of information technologies for the following system components in the implementation of the system: [organization-defined]
Heterogeneity. Employ a diverse set of information technologies for the following system components in the implementation of the system: [organization-defined].
5
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 the diverse technologies are each maintained and patched, since diversity multiplies maintenance · Vulnerability scanner / patch tooling
governing documentDocuments that govern the control
- The defined system components required to use diverse information technologies · Document repository
- List of technologies actually deployed for those components, showing the diversity achieved · Document repository
- Analysis of the common mode failure or common vulnerability the diversity is intended to break · Policy repository / GRC workspace
- Acquisition documentation showing diversity was a selection requirement · 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
- Different vendor products that share the same underlying library or platform, so the common mode remains
- Diversity introduced at one layer while all instances still run on one hypervisor or one cloud region
- Secondary technology poorly maintained, so diversity increases risk rather than reducing it
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-28 Protection of information at rest · SC-30 Concealment and Misdirection. Employ the following concealment and misdirection techniques for [organization-defined] at [organization-defined] to confuse and mislead adversaries: [organization-defined]