Authentication is the means by which you log in and identify yourself. Authorisation is the means by which a service determines whether an authenticated person should have access to a service.
The major authentication services in the university are EASE and Active Directory. Both are synchronised to use the same password.
There is also a central authorisation service provided by an LDAP directory. This gives information about individuals to services so that they can decide whether someone is authorised to use the service or not.
EASE is the University's reduced-sign-on service, providing access to various restricted applications and resources.
Central Authorisation Service
Authorisation is the means by which a service determines whether an authenticated person should have access to a service.
Shibboleth is a "federated" identity management system used to provide access to a variety of web applications, in particular e-journals.
Access control doors
Around the University are many hundred card readers which enable University card holders to selectively gain access to restricted areas. Entrances controlled by card readers are called "access control doors".