Single Sign On

My colleague Zach is in Utah for SCT/SunGard Luminis advanced training this week where he encountered their official definition of single sign on. SSO means many things to many people, so we often have to take time in our conversations to settle on a working definition.

Single Sign-On:
One userid, one password, entered one time, with passage allowed from one system to another without interruption

Of course, I like the above because it matches my own definition, but also because it identifies the most important feature for the end user: patrons can move transparently among multiple systems. Example: Yahoo movies, TV, mail, and calendar are all complex systems on their own, but Yahoo has done a great job of making them all work together. Accessing personalized information from all these services is simple, and you’ll only be asked to login once for each session.

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