Abstract: The invention relates to a method of securing applications on a chip card which is disposed in a digital appliance. A count is made of the number of times a personal identification number of a chip card application is input erroneously. When this number reaches a threshold, the application or the chip card is blocked. The erroneous input count and unblocking the chip card or the application is restarted when the personal identification number of the chip card is input. In this way, PIN-secured applications offer a high level of security without requiring the storing of additional unblocking data.

Abstract: The invention relates to a method of securing applications on a chip card which is disposed in a digital appliance. A count is made of the number of times a personal identification number of a chip card application is input erroneously. When this number reaches a threshold, the application or the chip card is blocked. The erroneous input count and unblocking the chip card or the application is restarted when the personal identification number of the chip card is input. In this way, PIN-secured applications offer a high level of security without requiring the storing of additional unblocking data.

Abstract: A portable electronic device has a case including: a smart chip, an application which is stored in the smart chip, at least one interface for a user, and a microcontroller which controls the smart chip and the interface. The aforementioned microcontroller is configured to execute the primitive functions of the electronic key in order for the interface to be used, while the smart chip is configured to execute the application. The application is configured to generate calls to the primitive functions in order to communicate with the user by means of the interface.