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And there is some number of users that simply are aware that "a DARIAH account" can be their institutional account, who even do not try to log in via AAI, going for the homeless user option.
Authentication and authorization technologies
DARIAH user authentication is leveraging on the institutional IdP of their users, part of national federations such as eduGAIN federations, and the catch-all community IdP to host homeless users, who are a consistent fraction of the community user-base.
DARIAH is interested in SAML2, and OpenID/OAuth2 technologies, plus X509 credentials for legacy reasons.
It is important for the community that the authentication technologies are as much user friendly as possible. For the community is also important the support for delegation and non-web access, on top of the normal web accessible services.