The Zend\Authentication component provides an API for authentication and includes concrete authentication adapters for common use case scenarios.
Zend\Authentication is concerned only with authentication and not with authorization. Authentication is loosely defined as determining whether an entity actually is what it purports to be (i.e., identification), based on some set of credentials. Authorization, the process of deciding whether to allow an entity access to, or to perform operations upon, other entities is outside the scope of Zend\Authentication.
