Stored object encryption enables the encryption of stored object data so that if an object store is compromised data cannot be retrieved in a readable form. By default, objects are not encrypted.
Objects can also be encrypted using the AES‐128 or AES‐256 encryption algorithm. Stored object encryption enables the encryption of all object data ingested through S3 or Swift. If disabled, currently encrypted objects remain encrypted. For S3 objects, the Stored Object Encryption setting can be overridden by the x-amz-server-side-encryption header. If you use the x-amz-server-side-encryption header, you must specify the AES-256 encryption algorithm in the request.