| 摘要 |
<p>The invention concerns a method solving security problems resulting from the addition of a security circuit to a smart card reading terminal by providing said security circuit with means for counting (36) the number of times (34) the security circuit is activated for certain sensitive operations. When the total of said operations reaches a fixed value (33), the security circuit is prevented from operating until it is re-initialised (38) again. Optionally the circuit may have to be replaced by another.</p> |
