A system and method that supports disjoint authentication server farms and disjoint policy or authorization servers for multi-session establishment. The authentication server has global knowledge of authenticators for additional sessions for a supplicant and can split authentication requests as needed...http://www.google.de/patents/US7631347?utm_source=gb-gplus-sharePatent US7631347 - System and method for multi-session establishment involving disjoint authentication and authorization servers
