Method of securing access to a proximity communication module in a mobile terminal

1. A method of securing access of a near-field communication module in a terminal to a security device configured to be blocked remotely, said near-field communication module comprising a security component connected to a wireless communication device, the method comprising the steps of:

storing security data in the security device;

authenticating, by the security component of the near-field communication module, said security device as a function of the security data stored in the security device, said authenticating comprising:

in response to an authentication request sent by the security component, consulting, by the security device, a file state parameter of a specific file in a memory of the security device; and

allowing or blocking transmission, by the security device, of the security data to the security component in response to said authentication request as a function of the state of the file state parameter; and

remotely blocking access to said security data by remotely accessing via a telecommunication network the specific file in the memory of the security device and setting the file state parameter of the specific file to a blocked state such that said transmission of the security data to the security component blocked.

2. The method according to claim 1 , wherein a personal identification number is stored in said security device during the step of storing security data in the security device.

3. The method according to claim 2 , wherein the security device protects each personal identification number when each personal identification number is stored.

4. The method according to claim 2 , wherein the terminal includes an operating system to provide communication between the security device and the security component of the near-field communication module and during the authentication step the operating system sends the security component of the near-field communication module at least one personal identification number stored in the security device, each said at least one personal identification number sent being compared with a code prestored in the security component of the near-field communication module.

5. The method according to claim 1 , wherein a cryptography key is stored in said security device during the step of storing security data in the security device.

6. The method according to claim 5 , wherein the terminal includes an operating system to provide communication between the security device and the security component of the near-field communication module and during the authentication step the security device effects an electronic signature using the cryptography key in response to an authentication request sent by the security component of the near-field communication module and forwarded by the operating system, said signature being returned to said security component by the operating system for verification.

7. A security device configured to be blocked remotely and configured to be included in a terminal including a near-field communication module, said near field communication module comprising a security component connected to a wireless communication device, the security device comprising:

a memory configured to store security data; and

a processor configured to transmit one of said security data and data calculated from said security data in response to a request for authentication of the security component of the near-field communication module said authentication comprising:

in response to said authentication request sent by the security component, consultation, by the security device, of a file state parameter of a specific file in a memory of the security device; and

allowing or blocking transmission, by the security device, of the security data to the security component in response to said authentication request as a function of the state of the file state parameter;

wherein the security device is further configured to block transmission of one of the security data and the data calculated from the security data to the security component of the near-field communication module by remotely accessing via a telecommunication network the specific file in said memory configured to store the security data and setting the file state parameter of the specific file to a blocked state such that said transmission of the security data to the security is blocked.

8. The security device according to claim 7 , wherein the security data includes at least one of a personal identification number and a cryptography key.

9. A terminal comprising the security device according to claim 7 and the near-field communication module including the security component, connected to the wireless communication device and configured to be included in the terminal including the security device in which said security data is stored, wherein the near-field communication module comprises an authentication processor configured to authenticate the security device as a function of the security data stored in the security device.