| 摘要 |
<p>Method of data processing for securing local resources in a mobile device (100), the method comprising: a) when network connectivity is available: - coupling the mobile device (100) with a first identity module (7) associated to a first International Mobile Subscriber Identity (IMSI), - receiving in the first identity module (7) a network challenge from a communication network, ciphering the network challenge using a secret key, and sending a corresponding response to the network for subsequent successful authentication, b) after a successful authentication to the communication network: - associating at least a part of the local resources to the first IMSI, and - storing, in a database (16) of the mobile device (100), authentication data related to the challenge/response duplet, - granting access to local resources associated to the first IMSI, c) when network connectivity is not available: - coupling the mobile device (100) with a second identity module associated to a second IMSI, - sending a challenge to the second identity module, said challenge being determined from the authentication data stored in the database (16), - receiving a response from the second identity module, - comparing the response received with the stored authentication data, and granting access to local resources associated to the second IMSI if the response received from the second identity module matches a response associated to the sent challenge in the database (16).</p> |
