MOBILE METHOD AND SYSTEM FOR MANAGING RISK IN A MOBILE TELEPHONE NETWORK

摘要

The invention concerns mobile telephone system networks, characterised in that the electronic chip card (22, SIM) comprises means (32) for authorising or not the computation of a cryptographic certificate and transmitting (56) it to the network when certain conditions are fulfilled or not and for transmitting to the network a message (38) requesting to assess risk when other conditions are fulfilled. Moreover, the network (54) comprises means (34) for assessing said risk on the basis of data contained in the message (38) requesting assessment of the risk and user-specific parameters and for sending a message (40) to said means (32) authorising or not the computation and transmission of the cryptographic certificate.