Haka is based on SAML
Haka federation is built on SAML. Majority of Haka members are utilizing Shibboleth, a standards-based open source middleware software. Haka federation operator CSC maintains information on federation members and partners. This information is published in Haka metadata. End user attributes applied in Haka are defined in FunetEduPerson schema.
Haka SAML 2.0 profile is based on the common SAML 2.0 profile of the Finnish public sector