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Research communities can leverage the EOSC-hub AAI services for managing their users and their respective roles and other authorisation-related information. At the same time, the adoption of standards and open technologies, including SAML 2.0, OpenID Connect, OAuth 2.0 and X.509v3, facilitates interoperability and integration with the existing AAIs of other e-Infrastructures and research communities. As shown in Figure 2, communities Communities can allow different authentication options for their members and, at the same time, enable access to all or a subset of the Infrastructures. It should be noted that this model also allows users to access resources as members of their home organisation. Being connected to multiple Community AAIs and the upstream institutional/social IdPs requires the Infra Proxies to properly support discovery for both community- and home organisation-based access scenarios.
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