In this presentation from QCon SF 2007, Justin Gehtland explains two open solutions to distributed identity and their Rails integration components: the OpenID system (using ruby-openid) and CAS (using rubycas-client).
Justin Gehtland, President and co-founder of Relevance, Inc., is the author or co-author of eight different technical books, including "Pragmatic Ajax", "Rails for Java Developers", and the Jolt(tm) award winning "Better, Faster, Lighter Java". He has talked at RailsConf, RubyConf, RailsEdge, JAOO, and the No Fluff, Just Stuff tour. He also works on Streamlined (streamlinedframework.org).
QCon is a conference that is organized by the community, for the community.The result is a high quality conference experience where a tremendous amount of attention and investment has gone into having the best content on the most important topics presented by the leaders in our community.QCon is designed with the technical depth and enterprise focus of interest to technical team leads, architects, and project managers.