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Single Sign-On (SSO) is an authentication process which allows users to access multiple sites with a single username and password. This is of particular benefit for organizations who wish to provide access to these resources without having to create individual accounts per site. Users also benefit by not having to remember and repeatedly enter login credentials for each site or resource they wish to access.
Drupal has a host of modules providing SSO functionality. Some utilize a centralized authentication server such as LDAP or Active Directory, others attempt to mimic this functionality via "shared" Drupal user accounts. This article will focus on the latter method using the Bakery module.