EAP/AKA Authentication
An extension to the EAP (Extensible Authentication Protocol) proposed by the IETF (Internet Engineering Task Force) enabling authentication and session key distribution using the UMTS AKA (Authentication and Key Agreement) mechanism. UMTS AKA is based upon symmetric keys and runs typically on a USIM (UMTS Subscriber Identity Module). EAP/AKA Authentication includes optional user anonymity and re-authentication procedures.