A company stores application data in many Amazon S3 buckets in one AWS account.

Use Amazon Inspector to determine which S3 buckets contain sensitive data. Create a new AWS KMS customer managed key and a key policy that provides access to administrators only. Set default S3 bucket encryption to use the new KMS key (SSE-KMS). Update the S3 bucket policy to add a Deny effect and a Condition element of "StringNotEquals": { "s3:x-amz-server-side-encryption": "aws:kms" }.

Use Amazon Inspector to determine which S3 buckets contain sensitive data. Update the key policy on the AWS managed key to provide access to administrators only. Use AWS Batch to encrypt all existing objects that include sensitive data in the S3 buckets with the updated AWS managed key.

Use Amazon Made to determine which S3 buckets contain sensitive data. Create a new AWS KMS customer managed key and a key policy that provides access to administrators only. Set default S3 bucket encryption to use the new KMS key (SSE-KMS). Create an AWS Step Functionsworkflow to encrypt all existing S3 objects that include sensitive data by using the new KMS key.

Use Amazon Made to determine which S3 buckets contain sensitive data. Update the key policy on the AWS managed key to provide access to administrators only. Update the S3 bucket policy to add a Deny effect and a Condition element of "StringNotEquals": { "s3:x-amz-server-side-encryption": "aws:kms" }.