The single sign-on authentication technology under development by the Liberty Alliance Project could be bound by intellectual property restraints, despite a pledge from project founders who have said the technology will be open and royalty-free. AOL Time Warner (AOLTW), one of the members of the 120-company consortium, has claimed with the release of version 1.0 of the Liberty Alliance specification that technology it contributed to the project is patented and may be subject to special licensing requirements.
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