How to set up S3 bucket encryption with KMS (Key Management Service)?

To set up S3 bucket encryption with KMS (Key Management Service), follow these steps:

1. Create a KMS key:

   • Sign in to the AWS Management Console and open the KMS console.
   • Choose "Create key" and select the "Symmetric key" option.
   • Enter a name for the key and define the key administrators.
   • Choose the key policy settings and click "Next".
   • Review the key details and click "Finish".

2. Enable default encryption for S3 bucket:

   • Sign in to the AWS Management Console and open the S3 console.
   • Select the bucket for which you want to enable encryption.
   • Click on the "Properties" tab and then select "Default encryption".
   • Choose "AES-256" as the encryption method and select the KMS key you created in step 1.
   • Click "Save" to enable default encryption for the bucket.

3. Encrypt objects uploaded to the bucket using KMS:

   • While uploading an object to the S3 bucket, select the option to enable server-side encryption.
   • Choose "AWS-KMS" as the encryption type and select the KMS key you created in step 1.

With these steps, you have successfully set up S3 bucket encryption with KMS. All objects uploaded to the bucket will be encrypted using the specified KMS key. Make sure to manage access to the KMS key and S3 bucket policies to ensure secure encryption and decryption of objects stored in the bucket.