OBS is inherently secure. It provides end-to-end security services. For example, if a bucket or an object is undisclosed when you access the bucket or object, only the owner of the bucket or object can access it. Further, the access to the bucket or object requires an AK and SK. You can also use various access control mechanisms (such as bucket policies and ACLs) to select users and user groups and grant them permissions. OBS supports data transfer using the HTTPS or SSL protocol. Additional security by data encryption is available for those wishing to enhance their security before uploading data to OBS.