Eyck has asked for the wisdom of the Perl Monks concerning the following question:
Esteemed monks, I'm seeking a simple, multi-server, multi-app authorisation method. Those that I know of, are M$ Passport, Liberty Alliance's solution, and Stanford University WebAuth (http://webauthv3.stanford.edu/).
Do monks have any experience with those? Are there others worth mentioning? Why perlmonks isn't using them?