| 摘要 |
In the present invention there is disclosed a method for securely identifying a mobile user U within a communication system including a plurality of users grouped in domains DiX and DiY within the system, whereby each user has an identifier AiU and a user's password or another encrypted authenticator PWiU, wherein the identifier AiU and the user's password PWiu is stored in the user's home domain DiX, which method comprises a synchronization indication, preferably utilizing a time interval indication TiU to synchronize said mobile user's U input within said foreign domain DiY with said home domain DiX, said method comprising the steps following each other: - encrypting said identifier AiU, said time interval synchronization indication TiU, and said user's password PWiu or another encrypted authenticator as well as generating an encrypted dynamic user's identifier SUid utilizing an encryption function, particularly one-way function; - providing an identifier of said home domain DiX to s |
