At IU, what is CAS?

At Indiana University, Central Authentication Service (CAS) is a login service that allows you to access multiple password-protected web systems after logging in once on a central authentication server; this is often referred to as single sign-on.

CAS currently supports several IU web applications, including Oncourse, OneStart, SafeWord card authentication, TimeKeeping, PeopleSoft, HRMS (payroll), and the employee Paid Time Off (PTO) system. In the future, other IU systems will begin using CAS, allowing you to access these systems with single sign-on. For example, after you have authenticated using CAS, you will be able to access services such as IU Webmail without having to log in again.

CAS currently supports three types of authentication: Kerberos, SafeWord, and Guest. Utilizing the many available tools, CAS clients can be deployed on a combination of platforms including Windows, Linux, and both Apache and IIS. CAS supports a variety of tools and languages including Java, Active Server Pages, and Perl.

The CAS login screen is at: https://cas.iu.edu/cas/login

At IU, no single sign-on solutions other than CAS are available, although other ways exist to authenticate users directly.

Also see:

• When logging into CAS, what username should I use?
• When logging into CAS, if my passphrase doesn't work, what should I do?
• For CAS, what is an application code?
• Information about integrating CAS with a web site