Migrating Customer Keys from US East to EU-Central Region
Question
Your application currently uses customer keys which are generated via AWS KMS in the US east region.
You now want to use the same set of keys from the EU-Central region.
How can this be accomplished?
Answers
Explanations
Click on the arrows to vote for the correct answer
A. B. C. D.Answer - D.
Option A is incorrect because keys cannot be exported and imported across regions.
Option B is incorrect because key rotation cannot be used to export keys.
Option C is incorrect because the backing key cannot be used to export keys.
Option D is correct because with AWS KMS multi-Region keys you can choose to replicate a multi-Region primary key into multiple Regions within the same AWS partition.
A single-Region KMS key generated by AWS KMS is stored and used only in the Region in which it was created.
For more information on KMS please visit the following URL:
https://aws.amazon.com/kms/faqs/The best option for using the same set of keys from the EU-Central region is to use AWS KMS multi-Region keys, which is option D.
AWS KMS multi-Region keys are the recommended approach to ensure that your applications running in different regions have access to the same set of keys. With multi-Region keys, you can create a single customer master key (CMK) that can be used to encrypt and decrypt data across multiple regions. AWS KMS stores the key material in multiple regions, allowing you to use the key in any region where AWS KMS is available.
Option A, exporting the key from the US east region and importing it into the EU-Central region, is not recommended because it requires manually managing the key in two different regions, which can be error-prone and time-consuming.
Option B, using key rotation to rotate the existing keys to the EU-Central region, is not feasible because key rotation only changes the cryptographic key that is used to encrypt the data, but it does not change the region where the key is stored.
Option C, using the backing key from the US east region in the EU-Central region, is not a recommended approach because it requires manually managing the key in two different regions, which can be error-prone and time-consuming. Additionally, using the backing key of another region may cause security concerns as it may not be optimized for that region.
Therefore, using AWS KMS multi-Region keys is the recommended approach for ensuring that your application uses the same set of keys across multiple regions.
