This is the future for Identity and web applications (others too) Lasso - Souk is a Python implementation of the Liberty Alliance protocols built on top of Lasso which is a library that can be called from a variety of languages including Java and PHP.
Liberty is a great idea and free tools like Lasso will make it much
more widely used by web applications from smaller companies. It is
something Sun have pushed a lot.
Found via PyPi
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