A. Use client-side encryption with an AWS KMS customer-managed key implemented with the AWS Encryption SDK.
B. Use AWS CloudHSM to store the keys and perform cryptographic operations. Save the encrypted text in Amazon S3.
C. Use an AWS KMS customer-managed key that is backed by a custom key store using AWS CloudHSM.
D. Use an AWS KMS customer-managed key with the bring your own key (BYOK) feature to import a key stored in AWS CloudHSM.

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