Security in depth · Unit 23 · Lesson 12 of 14
Recovery copies need separate protection
Review whether a protected backup still depends on unavailable production keys.
Helpful before thisDefenses and detection
After this lesson you can
- Separate protection of stored copies from the dependencies needed to restore them.
A surviving copy and a usable recovery path are different achievements.
List what restoration depends on
A recovery dependency is a resource, permission, or service needed to turn a copy into usable operation. Data, decryption keys, authorized identities, software, and a suitable destination can all matter. Separate storage addresses some failures while leaving others shared with production.
Assume a fictional archive needs to recover while its production identity and key services are unavailable. Its backup contract protects stored objects from modification or deletion during a thirty-day retention period. That guarantee concerns objects; it does not promise that every restoration dependency survives.
Supplied recovery record
- B1: Yesterday’s encrypted copy exists, and the documented retention protection is active for thirty days.
- B2: The only documented decryption route uses the production key service. An independent authorized recovery route has not been demonstrated.
- B3: Last month’s restore succeeded while production identity and key services were available.
Assess the missing condition
B1 supports survival of the protected object. B3 supports restoration under the conditions exercised. Neither establishes restoration under the outage assumed here. The key might still be recoverable, but the supplied evidence does not show how authorized staff would obtain usable access.
Keep copy protection and recovery readiness as separate statuses. Require a documented, access-controlled recovery route and an exercise that includes the unavailable production services. Record how the restored data and necessary application behavior will be verified, not simply whether copying finished.
Model conclusion: Retention protection is documented. Recovery during the specified key-service outage remains unverified; the earlier successful exercise does not close that gap.
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What is the best conclusion from B1-B3?
Show the answer
Correct answer: The copy’s retention is established, but recovery without the production key service is unverified. Protection against altering the object does not provide a usable decryption key. The previous exercise retained that dependency.
Try it
- WriteMake a restore-readiness table for B1-B3 with copy integrity, decryption key, and authorized access. Mark key availability unverified and name the failure scenario a future exercise must cover.