| 摘要 |
In the method in accordance with the present invention, the subscriber identifier to be sent to the transmission network is encrypted using a cipher key common to a specific group of subscribers, and a random number is attached to the identifier to be sent to the network. For example, a subscriber group may consist of the subscribers to a single given operator. The section of the identifier specifying the subscriber group is sent to the network in a non-encrypted format, in which case the network is able to direct the encrypted message to such a network element where it can be deciphered. |
