kmsKeyId

The Amazon Web Services KMS key identifier for an encrypted DB instance.

The Amazon Web Services KMS key identifier is the key ARN, key ID, alias ARN, or alias name for the KMS key. To use a KMS key in a different Amazon Web Services account, specify the key ARN or alias ARN.

This setting doesn't apply to Amazon Aurora DB instances. The Amazon Web Services KMS key identifier is managed by the DB cluster. For more information, see CreateDBCluster.

If StorageEncrypted is enabled, and you do not specify a value for the KmsKeyId parameter, then Amazon RDS uses your default KMS key. There is a default KMS key for your Amazon Web Services account. Your Amazon Web Services account has a different default KMS key for each Amazon Web Services Region.

For Amazon RDS Custom, a KMS key is required for DB instances. For most RDS engines, if you leave this parameter empty while enabling StorageEncrypted, the engine uses the default KMS key. However, RDS Custom doesn't use the default key when this parameter is empty. You must explicitly specify a key.