Authentication and Access Management

At the U of S we use a number of different authentication systems to manage access to services. Some authentication services operate behind the scenes, while others are visible through login pages. All of these systems have one thing in common: you log in with the same username and password -- your NSID.

Windows Active Directory

When you log in to Windows computers or use services running on Windows servers, behind the scenes your NSID and password are verified by our Active Directory Servers.

Lightweight Directory Access Protocol (LDAP)

LDAP is another behind the scenes authentication system, used by several systems including PAWS.

Central Authentication Service (CAS)

At the U of S, we use CAS to simplify how you access our services—with CAS, you only need to log in once to access all CAS-managed services.


Shibboleth is used to access a few external services (Lynda, ScienceDirect, FluidSurveys). Shibboleth uses CAS for authentication so you won't normally see a separate Shibboleth login page, but depending on how you connect to one of these services you may see the Canadian Access Federation's WAYF (where are you from) page.

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