A system for user authentication includes a gateway operable to receive a user authentication request in an Internet Protocol format from a server. The gateway communicates the user authentication request in a Signaling System 7 protocol to a user registry. The gateway is also operable to receive a user...http://www.google.fr/patents/US7716723?utm_source=gb-gplus-shareBrevet US7716723 - System and method for network user authentication
