Casey Bisson

wpCAS integrates WordPress into an established CAS architecture, allowing centralized management and authentication of user credentials in a heterogeneous environment.
<a href="http://en.wikipedia.org/wiki/Central_Authentication_Service" rel="nofollow ugc">From Wikipedia</a>:
<blockquote>The Central Authentication Service (CAS) is a single sign-on protocol for the web. Its purpose is to permit a user to log into multiple applications simultaneously and automatically. It also allows untrusted web applications to authenticate users without gaining access to a user’s security credentials, such as a password. The name CAS also refers to a software package that implements this protocol.</blockquote>
Users who attempt to login to WordPress are redirected to the central CAS sign-on screen. After the user’s credentials are verified, s/he is then redirected back to the WordPress site. If the CAS username matches the WordPress username, the user is recognized as valid and allowed access.
<a href="http://en.wikipedia.org/wiki/AuthZ" rel="nofollow ugc">Authorization</a> of that user’s capabilities is based on native WordPress settings and functions. CAS only authenticates that the user is who s/he claims to be.
If the CAS user does not have an account in the WordPress site, an administrator defined function can be called to provision the account or do other actions. By default, CAS users without WordPress accounts are simply refused access.

wpCAS

wpCAS integrates WordPress into an established CAS architecture, allowing centralized management and authentication of user credentials in a heterogen …

gpspake

This plugin uses the phpCAS library to integrate CAS single sign on with WordPress.
<ul>
<li>Provide users with a familiar secure login on multiple WordPress sites without the need for additional expensive ssl certificates.</li>
<li>phpCAS configuration settings can be set in the plugin options </li>
<li>Login screen redirects to CAS url specified in options </li>
<li>New user accounts will be created for users who have not logged in to the site yet </li>
<li>User attributes returned by CAS can be used to populate new user account details such as email address and display name. </li>
<li>Service urls can be captured to redirect users to the same page on log in/out. (Logoutwithredirectservice must be enabled on CAS server for log out redirects to work.)</li>
</ul>
<h3>Special thanks</h3>
David R. Poindexter III and Indiana University – During the development of this plugin, IU-WPCAS was one of the only CAS plugins for WordPress and provided a good bit of inspiration. Clearly, our plugin’s name is completely original.
Todd Barber and Billy Barnet @ UTHSC for all of their patience, support and good advice

UTHSC WPCAS

Integrate Central Authentication Service (CAS) with WordPress

wpCAS vs UTHSC WPCAS