The access to read, write, or execute resources should be authorized for only those entities that have a need for that access within the requirements of the system. Authorizationcan be as coarse-grained as allowing or disallowing a Clientto access a Serveror it could be much finer grained such as allowing specific actions on specific information items by specific users. The granularity of a system depends in part on the functionality supported by the Server, but in general Authorizationshould be given based on the need-to-know principle i.e. a user should be granted access only to information they require for the function they are performing.