RDS instances should be encrypted with a customer-managed KMS key

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Description

RDS instances should be encrypted using a customer-managed KMS key rather than the default AWS-managed key. Customer-managed keys provide full control over key rotation policies, access permissions via KMS key policies, and the ability to revoke or disable the key.

Remediation

Create a new RDS instance with a customer-managed KMS key specified, or restore from an encrypted snapshot using a customer-managed key. Existing instances cannot have their encryption key changed in place. For guidance, refer to Encrypting Amazon RDS resources.