Public Sector Internal Identity Federation, or PSIIF, is an IT service developed by the British government.
Service
PSIIF is an identity federation service, to allow civil servants and other public-sector actors to authenticate against other public sector IT systems; potentially offering Single Sign On across multiple departments and agencies, and on the G-cloud. This allows better sharing of information and services.
PSIIF offers several "levels of assurance" of identity:
Access to systems with higher-impact data would usually require higher levels of assurance. PSIIF is designed to support services handling OFFICIAL information, with business impact levels from IL1 to IL3.
PSIIF will use SAML2.
References
Public Sector Internal Identity Federation Wikipedia(Text) CC BY-SA