CyberGuard dictionary / Business Cybersecurity
Backup
A separate copy of data kept so it can be restored after loss, corruption, or disruption.
In simple terms
A backup is a copy you can use if the original is deleted, damaged, or locked.
Technical explanation
Useful backup strategies consider separation, integrity, retention, access controls, and periodic restore tests.
A backup is useful only if it can be restored with the required data, keys, and permissions. Separation from production helps prevent the same incident from destroying both live data and its copies.
Examples in practice
A business restores a document from yesterday’s protected backup after accidental deletion.
After accidental deletion, the business restores one file and verifies its contents. During a later exercise it restores an entire service to prove the broader recovery path works.
Why it matters
An untested backup may fail exactly when it is needed.
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Sources and further reading
Published 2026-10-15 · Last updated 2026-10-15 · CyberGuard editorial content. Source links provide context; they do not imply endorsement.