Pre-control of a program in an additional chip card of a terminal
Prior to the execution of a program contained in a second chip card inserted in a terminal such as a mobile radio telephone terminal, in addition to a first chip card containing data and connected to a telecommunication network to which the terminal is linked, one of the cards is authenticated by the other, or the two cards are authenticated mutually. This double authentication ensures the authenticity of the program for its overall execution in the terminal and the origin of the second card, distributed through conventional channels, for the network operator.
1. A process for executing an application program contained within a card in a mobile telecommunication terminal, said terminal comprising a first card, and a second card containing the application program to be executed, said method comprising the steps of:
transmitting, from said second card to said first card, information pertaining to the application program to be executed;
authenticating said second card via said first card, based upon said transmitted information; and
executing said application program contained within the second card if the authentication is successful
wherein the first card contains a subscriber identification module and communication information.
2. The process of claim 1 , wherein said authenticating step is performed, at least in part, by a server remote from said terminal, in response to a request from said first card.
3. The process of claim 1 , further including the step of authenticating said first card by said second card, prior to executing said application program.
4. The process of claim 1 , wherein said transmitted information includes an identifier of the application program.
5. The process of claim 1 , wherein said transmitted information includes characteristics required for the execution of the application program.
6. The process of claim 1 , wherein said authenticating step comprises:
using the information pertaining to the application program to be executed to select a key;
processing a data value in accordance with said key; and
comparing the processed data value with a value received from said second card.
7. The process of claim 6 , wherein said data value comprises said information pertaining to the application program.
8. The process of claim 6 wherein said data value comprises a random number, and the value received from said second card is a signature generated from said random number by said second card.
9. The process of claim 1 , wherein said step of executing said application program is carried out by either the first card or the second card or the mobile telecommunication terminal.
10. A mobile communications terminal, comprising:
a first card for executing an application program contained within another card, said first card containing a subscriber identification module and communication information; and
a second card, said second card containing the application program to be executed, wherein said first card comprises:
means for receiving, from said second card, information pertaining to the application program to be executed;
means for authenticating said second card, based upon said transmitted information; and
means for executing said application program contained within the second card if the authentication is successful.
11. A first card for executing an application program contained within a second card, the second card containing the application program to be executed, the first card comprising:
means for receiving, from the second card, information pertaining to the application program to be executed;
means for authenticating the second card, based upon the information pertaining to the application program to be executed; and
means for authorizing an execution of said application program contained within the second card if the authentication is successful
wherein the first card contains a subscriber identification module and communication information.