| 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> |
