Machine-to-machine cellular communication security

摘要

Facilitating authentication on communication between An M2M type mobile terminal 20 and a server 80 is achieved. The communication is made through a Serving GPRS Support Node (SGSN) 30 of a network 10 in which the mobile terminal is operating. A Home Public Land Mobile Network (PLMN) 50 of the mobile terminal generates a ciphering key for encryption of packet-switched data between the mobile terminal and the server. As part of a message from a network entity in the Home PLMN to the SGSN in which the SGSN expects to receive the ciphering key, alternative data is communicated in place of the ciphering key. Secure communication between the mobile terminal and the server is performed by applying encryption using a ciphering key generated by a network entity in a Home PLMN of the mobile terminal in messages between the mobile terminal and the server. The end point for encryption via the SGSN is thereby changed to the server.