Question about the pricing of using KMS+HSM (custom key store)

Question

Hello, I would like to ask about the pricing of using KMS+HSM (custom key store).

If the user wants to create/store the KMS key in the HSM, as shown in the 'Amazon S3 example: Using a custom key store with CloudHSM' in the AWS Key Management Service (AWS KMS) pricing page, I would like to ask if the following fare calculation method is correct.

Regardless of the number of keys stored in the HSM (with no limit on the number of keys), the hourly price ($1.54/hour) for using the HSM is charged at 1.54$*2 = 3.08$ (because cluster redundancy is the default) in addition to the key month cost + number of key calls.

Is this calculation method right?

Here is the URL for the 'Amazon S3 example: Using a custom key store with CloudHSM'; https://aws.amazon.com/ko/kms/pricing/

Thank you ahead for you help. :)

Answer

The pricing calculation you described for using KMS+HSM custom key store is partially correct. The hourly rate for using the HSM ($1.54/hour) is charged for each HSM, so it would be $1.54 * number of HSMs you are using.

In terms of the KMS key usage, you would be charged for the number of KMS key calls you make, as well as the monthly cost for the number of KMS keys you are storing.

For more details on the exact pricing for the specific region you are operating in, I would recommend referring to the AWS KMS pricing page: https://aws.amazon.com/kms/pricing/. This page provides a more detailed explanation of the pricing and also allows you to calculate costs based on your specific use case.

Question about the pricing of using KMS+HSM (custom key store)

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