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?
Click on the arrows to vote for the correct answer
A. B. C. D.Answer: D.
AWS KMS supports multi-region keys, which are AWS KMS keys in different AWS Regions that can be used interchangeably - as though you had the same key in multiple Regions.
With multi-Region keys, you can more easily move encrypted data between Regions without having to decrypt and re-encrypt with different keys in each Region.
Multi-Region keys are not global.
You create a multi-Region primary key and then replicate it into Regions that you select within an AWS partition.
Then you manage the multi-Region key in each Region independently.
Neither AWS nor AWS KMS ever automatically creates or replicates multi-Region keys into any Region on your behalf.
Option A is incorrect because neither AWS nor AWS KMS automatically replicates any keys into another Region.
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 multi-Region keys have the capability to replicate keys from one AWS Region into another.
For more information on KMS keys, kindly refer to the following URL:
https://aws.amazon.com/about-aws/whats-new/2021/06/kms-multi-region-keys/ https://docs.aws.amazon.com/kms/latest/developerguide/multi-region-keys-overview.htmlOption A is not entirely accurate because while AWS KMS does automatically replicate keys to multiple regions, it is not guaranteed to happen immediately and might not always be desirable.
Option B involves key rotation, which is a process of creating a new key while the old key is still in use. This method can work, but it might be inefficient since it requires creating a new key for each region where you want to use the key.
Option C is not a recommended practice since it can introduce security risks. The backing key should always be kept secret and not shared between different regions.
Option D, using multi-Region keys in AWS KMS, is the recommended solution. Multi-Region keys allow you to create a single key that can be used across multiple regions. This key is backed by a set of regional keys that are created and managed by AWS KMS automatically. The regional keys are used to perform cryptographic operations within their respective regions, while the multi-Region key is used to manage the key material and metadata for the key. This approach provides a secure and efficient way to use a single key across multiple regions.