| 摘要 |
The invention concerns a method for ensuring the safety of a security module (8) designed for co-operating with a data processing device (1), said module being arranged for executing a set of operations including at least a sensitive operation (23). The invention is characterised in that the method comprises the following steps consisting in: executing, for each execution of the sensitive operation and upstream of it, a first sequence of supplementary operations (22) for activating signalling means and, downstream of said sensitive operation, a second set of supplementary operations (24) for deactivating said signalling means; verifying, for each execution of the sensitive operation and upstream of the first sequence of supplementary operations (22), whether the signalling means are deactivated; if the signalling means are activated, inhibiting the execution of the sensitive operation.
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