You must include the provide a request header, x-amz-server-side-encryption. S3 SSE
encrypts each object with a unique key. Unfortunately there is no way to enable SSE for a bucket where SSE happens automatically. There is no such bucket policy or bucket setting. Some third party tools take care of automatically using SSE, such as S3 browser:
http://s3browser.com/amazon-s3-server-side-encryption.php. You can enable encryption for already uploaded files, and it can also be configured to automatically apply encryption during uploading.
