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In general using using the SAML Web Browser SSO profile tools are user friendly and they fulfill the user expectations, where such expectations are SSO capabilities with a adequate level of security.
Adopted Authentication & Authorisation Technologies
BioVel
The community is still at the beginning of adopting federated identity/authorization solutions. Working closely with EGI and other service providers using X509 certificates as an authentication mean, the community is relying on the IGTF certification authorities federation. The overhead of obtaining and maintaining a personal certificate could though be seen as an excessive overhead by many new users. This solution is also not feasible for homeless users.