I'm not entirely sure if this is the right site for this, but I'll give it a shot.
Basically, I'm looking into different ways of setting up a single sign-on service for an existing corporate environment. Within this environment, there's anything from old legacy systems to new web services, all running on different platforms.
I'm not really looking for specific solutions, as much as high-level approaches/strategies. I found a great writeup here, but it's from 1997, so it's not exactly up-to-date. If you know of a similar, but newer, paper, please post a link to it. If not, I would be eternally grateful if you were able to contribute with information on more modern models that haven't yet been brought up. If you have implemented such a system in a similar environment, I would be very interested to hear how you went about it, and why you chose that specific strategy.
If this question would fit better on another site, please leave a comment and I'll post it there instead.