METHOD OF UNBLOCKING A LOCKED APPLICATION USING A PERSONAL IDENTIFICATION NUMBER

摘要

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.