Anybody working on SSO class/project ???

Hi everybody, I'm currently trying to design a PHP SSO (Single Sign On) application, and would like to know if anybody has already done anything. I haven't found any SSO project in PHP yet, but I think it should be part of the Auth package. Some people tried to design a User class a while ago, but I don't know if it has given anything. The simple way would be to patch all application so that they use the same auth application, but it would break compatibility with those application updates. The best way is then to provide an application that stands on top of all others, and give the ability to use one single authentication to access to those others. It needs to know how each application performs auth and "simulate" it for any user. Do you have any idea or do you know any existing script ? Regards, -Nicolas -- Nicolas "Brush" HOIZEY Free PHP projects http://www.phpheaven.net Veille tous azimuts http://www.gasteroprod.com Clever Age http://www.clever-age.com