Abstract: A method to attach a mobile device to a server, using a protocol having data size encoding constraints which prevents using traditional ciphering, includes an initialization phase using a range of ephemeral IMSIs stored in a batch of credential containers of mobile devices and an associated group master key shared by the server and credential containers having the same range of ephemeral IMSIs to initiate a session using a server random value. The initialization phase uses limited payload in a mobile device-to-server message to send a randomly chosen rIMSI among the range of IMSIs to enable the server to generate keys to initiate a secured communication phase, then using individual keys stored in the mobile device and retrieved by the server with an identifier of the credential container sent in a mobile device-to-server message and with an individualization master key owned by the server.

Abstract: Provided is a method for dynamically selecting a mobile subscription for a secure element cooperating with a terminal in a telecommunication system comprising a network visited by the terminal and a HSS of a server The method includes sending from the secure element a random e-IMSI ephemeral IMSI in a first attachment request message to the HSS through the visited network, the visited network having the best received signal and having a roaming agreement with an e-IMSI service provider; and transmitting 101 from the HSS to the secure element in a signaling message a PLMN list of all the local operators having a commercial agreement with the e-IMSI service provider.

Abstract: A method to attach a mobile device to a server, using a protocol having data size encoding constraints which prevents using traditional ciphering, includes an initialization phase using a range of ephemeral IMSIs stored in a batch of credential containers of mobile devices and an associated group master key shared by the server and credential containers having the same range of ephemeral IMSIs to initiate a session using a server random value. The initialization phase uses limited payload in a mobile device-to-server message to send a randomly chosen rIMSI among the range of IMSIs to enable the server to generate keys to initiate a secured communication phase, then using individual keys stored in the mobile device and retrieved by the server with an identifier of the credential container sent in a mobile device-to-server message and with an individualization master key owned by the server.

Abstract: According to one embodiment of the present invention, there is provided a method, in a communication network, of associating a subscriber directory identifier to a first subscriber identifier. The method comprises receiving a request to connect a communication device to the network, the request including a subscriber identifier derived from the first subscriber identifier, determining the first subscriber identifier from the received subscriber identifier, and associating a subscriber directory identifier with the determined subscriber identifier.

Abstract: According to one embodiment of the present invention, there is provided a method, in a communication network, of associating a subscriber directory identifier to a first subscriber identifier. The method comprises receiving a request to connect a communication device to the network, the request including a subscriber identifier derived from the first subscriber identifier, determining the first subscriber identifier from the received subscriber identifier, and associating a subscriber directory identifier with the determined subscriber identifier.