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Considering a classical identity federation, which is typically operated by an NREN, the legal entity acting as federation operator, is the central contractual partner of all participants, both service providers and IdP operators, the latter usually being home organizations. Acting as policy-making authority and legal hub, the federation operator ensures the mutual trust between the participants. Based on this model, this document describes in more detail some variants in the relationship between federation operators and the actors involved in operating an IdP, discusses the applicability of those models to Guest IdPs, and points to a range of sustainability models whose applicability depends on the collaboration scenario.
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- Sustainability models for Guest IdPs (version 2016-04-26): in PDF and MS Word format.