Anonymous access

To request anonymous access to a bucket or object, you use the Authorization request header with the AWS authentication format. However, instead of providing credentials for a user account, you specify all_users in place of the access key and leave the signature blank, like this:

Authorization: AWS all_users:

The colon after all_users is required.

NoteIf the bucket you are trying to access is configured to support single sign-on with Active Directory (AD), anonymous requests to access that bucket or objects in that bucket fail.