| 摘要 |
A smart card (SC) of a user being a subscriber of a first network (TN1) and wishing to become a subscriber of a second network (TN2), a first identity (IMSI_1) and a first authentication key (AK_1) being stored in the smart card (SC), an application server (AS1) in the first network receives a request (Req) of subscription change, establishes a session with another application server (AS2) of the second network (TN2), and sends a message (Mes) comprising the first identity (IMSI_1) and the first authentication key (AK_1) to said another application server (AS2) that allows the smart card (SC) to be authenticated in the second network. Said another application server (AS2) sends another message (MesP) comprising an admin code, a second identity (IMSI_2) and a second authentication key (AK_2) to the communication device to replace the first identity and the first authentication key if the admin code is valid. |
