We are thinking of using Alfresco for storing critical financial documents controlled by strict ACL rules. This can be configured in Alfresco itself. But we found that Alfresco uses file-system to store documents. We do not know the exact format, but we would like to know that, in a normal configuration, the system admins managing the server running Alfresco, should not be able to get the content of Alfresco hosted documents. Is it the case now?