The key gets deleted at the end of the configurable waiting period if you don’t cancel the deletion. The key cannot be used if it is scheduled for deletion until you cancel the deletion during the waiting period. You can cancel key deletion during the waiting period. This waiting period helps you verify the impact of deleting a key on your applications and users that depend on it. You can schedule an AWS KMS key and associated metadata that you created in AWS KMS for deletion, with a configurable waiting period from 7 to 30 days. Q: Where is my data encrypted if I use AWS KMS? All requests to use your KMS keys are logged in CloudTrail so you can understand who used which key under what context and when they used it. The AWS service then decrypts your data and returns it in plaintext. If the user requesting data from the AWS service is authorized to decrypt under your KMS key, the AWS service will receive the decrypted data key from AWS KMS. When a service needs to decrypt your data, it requests AWS KMS to decrypt the data key using your KMS key. AWS services encrypt your data and store an encrypted copy of the data key along with the encrypted data. Data keys are not retained or managed by AWS KMS. The data keys are themselves encrypted under an AWS KMS key you define. Under this method, AWS KMS generates data keys that are used to encrypt data locally in the AWS service or your application. You set usage policies on these keys that determine which users can perform which actions under which conditions.ĪWS services and client-side toolkits that integrate with AWS KMS use a method known as envelope encryption to protect your data. Once you have created a KMS key, you can submit data directly to the service AWS KMS to be encrypted, decrypted, signed, verified, or to generate or verify an HMAC using this KMS key. You control the lifecycle of any customer managed KMS key and who can use or manage it. You can start using the service by requesting the creation of an AWS KMS key. It’s also in scope for a broad set of industry and regional compliance regimes. If you’re responsible for proving data security for regulatory or compliance purposes, you should use it because it facilitates proving your data is consistently protected. If you’re looking for a scalable key management infrastructure to support your developers and their growing number of applications, you should use it to reduce your licensing costs and operational burden. If you are a developer who needs to digitally sign or verify data using asymmetric keys, you should use the service to create and manage the private keys you’ll need. If you are a developer who needs to encrypt data in your applications, you should use the AWS Encryption SDK with AWS KMS to more easily generate, use and protect symmetric encryption keys in your code. If you are responsible for securing your data across AWS services, you should use it to centrally manage the encryption keys that control access to your data.
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