Why backups are an audit focus
Anyone can claim they have backups. Auditors care that you defined what is backed up, how often, where copies live, and — critically — that you test restores. An untested backup is a hope, not a control.
What to include
- Scope — which systems and data are in scope, by criticality.
- Frequency — backup cadence tied to your Recovery Point Objective (RPO).
- Retention — how long copies are kept, and secure deletion afterwards.
- The 3-2-1 rule — three copies, two media, one off-site/immutable to survive ransomware.
- Encryption — backups encrypted at rest and in transit.
- Restore testing — periodic, documented restore tests with results retained; tie to your Recovery Time Objective (RTO).
- Responsibilities — who runs, monitors and tests backups.
Common mistakes
- Never testing restores until a real incident.
- No off-site or immutable copy, so ransomware encrypts the backups too.
- Confusing replication with backup — a replicated bad state is still bad.
Framework alignment
Maps to ISO 27001:2022 Annex A 8.13 (information backup), the SOC 2 availability criteria, and NIST CSF Recover (RC.RP).
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