[keycloak-user] Step-Up Authentication

Hi Keycloak users, we have a requirment to provide step-up authentication. Looking at Keycloak server and its adapters, it appears there is no support for it out of the box. Also user group email http://lists.jboss.org/pipermail/keycloak-user/2016-April/005707.html suggests it will come at some stage later. Has anyone used keycloak to provide step up authentication?