Patent ID: 6072875
Filing Date: 2000-06-06
Classification: H04L,H04W

Abstract:
A method, within a communication system, for securely identifying a mobile user, said communication system including a plurality of users, a home domain associated with said mobile user, a foreign domain, and a synchronization indication, said synchronization indication utilizing a time interval indication to synchronize said mobile user's input within said foreign domain with said home domain, said mobile user having an identifier and a password, said method comprising the steps of:deriving said synchronization indication from numbers located in said home domain, and available to said foreign domain;encrypting said identifier, said synchronization indication, and said password utilizing an encryption function;providing an identifier of said home domain to said foreign domain;transmitting an encrypted message including said encrypted identifier, said encrypted synchronization indication, and said encrypted password to said home domain; anddetermining, within said home domain, an identity of said mobile user utilizing said encrypted message, said encryption function, and said synchronization indication in response to said transmitting step.