Liberty Alliance

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The Liberty Alliance, also known as Project Liberty or the Liberty Alliance Project, is a consortium made up of more than 150 companies and organizations that wants to create open standards for Identity Federation, Single Sign-On and related technologies. It has been founded in 2001 by Sun and several partners to build a decentralized and open alternative to the centralized and proprietary Passport system by Microsoft.

The Liberty Alliance framework heavily focuses on webservices as well as web applications with user interaction through common web browsers. It uses SAML to convey authentication and related information.

One free implementation of the Liberty Alliance standards is LASSO: A C library that supports the processes that are needed for the most common Liberty Alliance profiles and also is usable from other programming languages through the use of SWIG. Closely related to LASSO is SOUK, a Python framework that uses LASSO and actually implements the Liberty Alliance profiles.

Glossary

Some of the more important terms:

identity provider 
A liberty-enabled system that manages identity information on behalf of principals and provides assertions thereof to other providers.
principal 
An entitity whose identity can be authenticated. Mostly synonymous to "user" or "natural person"
service provider 
Usually consumes identity assertions from identity providers and then provides services or goods to a principal authenticated this way.

External links

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