The Open Identity Exchange named Google among the first identity providers to be approved by the U.S. Government as meeting federal standards for identity assurance. Google’s identity, security, and privacy specifications have been certified. The National Institute of Health is the first government website ready to accept such credentials. The hope is that the work of the OIX and other groups will continue to grow and help facilitate more open government participation, as well as improve security on the Internet by reducing password use across websites.”]
Source: https://security.googleblog.com/2010/03/federal-support-for-federated-login.html