Bring Your Own Key: Encryption sovereignty without the headache

Aiven’s Bring Your Own Key (BYOK) feature lets customers retain control of encryption keys in their own AWS KMS, Google Cloud KMS, or Azure Key Vault while granting Aiven narrowly scoped permissions to encrypt and decrypt service data. It is particularly relevant for regulated sectors, sovereignty requirements, and organizations seeking immediate revocation capabilities, since disabling or revoking the key can make data inaccessible without requiring provider intervention. Across all three clouds, implementation follows the same broad process of creating a key, granting Aiven access, registering it as a customer-managed key, and attaching it to a service, though cloud-specific IAM requirements can make GCP, AWS, and especially Azure setup more complex. Key rotation behavior differs by provider: AWS rotation is generally transparent, GCP requires retaining older key versions for existing encrypted data, and Azure may require updating Aiven’s key registration when version-specific key URIs are used. The feature transfers meaningful operational responsibility to customers, who must protect keys, maintain permissions, plan rotation and retention, and rehearse emergency revocation because Aiven cannot recover data made inaccessible through customer-side KMS changes.

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