Eric Sachs, Product Manager, Google Security Originally posted 9/18/2008 (last update 10/27/08) Federated Login has been a "holy grail" in the identity community for a long time. We have known how to do the technical part for a long time. However the industry has constantly tried, and failed, to find a model that was (1) simple for end users, and (2) had a reasonable trust model between the RP (