what will happen when an encrypted snapshots attached to a different region instances?

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Thamimul ansari · Accepted Answer

Encrypted snapshots are region-specific. They cannot be attached directly to instances in another region.To use them cross-region, you must copy the snapshot into the target region and use an appropriate KMS key.Attempting a direct attachment without copying will fail due to encryption key mismatch and regional isolation of the snapshot.This ensures that encrypted data remains secure while allowing flexibility through controlled cross-region snapshot copies.

Thamimul ansari · Answer

When you move an encrypted EBS snapshot to another Region, AWS forces a copy + re‑encryption step because KMS keys are Region‑scoped. The resulting volume will attach normally only if the KMS key in the destination Region is usable and grants the instance permission

what will happen when an encrypted snapshots attached to a different region instances?

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