Blobs are always stored and organized into containers. A container can be either private or public, and specifies both the sharing and privacy level of the set of blobs it contains. Private containers require you to authenticate every request in order to execute any operation on its underlying blobs. Public containers allow anonymous reads to all blobs; but, of course, all write operations, such as create, update, or delete, should be authenticated.

Shared access policies can be applied on containers to provide more specific privileges and controlled access. A storage account can have an infinite number of containers, and containers can have an unlimited number of...