A healthcare application stores PHI in Amazon DynamoDB. Compliance requires that all data is encrypted at rest using a key that the security team can rotate annually. The application must not experience downtime during key rotation. Which solution meets these requirements?

Answer options:

Use AWS Owned Keys for DynamoDB encryption.

Use AWS KMS Customer Managed Keys for DynamoDB encryption. Enable automatic key rotation in KMS.

Encrypt data in the application layer before writing to DynamoDB. Rotate the keys manually.

Use AWS CloudHSM to generate keys and import them into KMS. Rotate them manually.

How to approach this question

Identify the KMS key type that supports automatic rotation.

Full Answer

B.Use AWS KMS Customer Managed Keys for DynamoDB encryption. Enable automatic key rotation in KMS.✓ Correct

AWS KMS Customer Managed Keys support automatic annual rotation. KMS keeps the old backing keys to decrypt existing data, ensuring zero downtime for the application.

Common mistakes

Thinking imported keys support automatic rotation.

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