Portable data carrier having an operating error counter
AssigneeGiesecke & Devrient GmbH
InventorOliver Gibis
Life of this patent
Estimating the term…
Abstract
A method in a portable data carrier for safeguarding the data carrier against external attacks on the data carrier, wherein at least one counter is employed in the data carrier. A specified command is safeguarded such that it is executed by the data carrier only when the at least one counter lies in a specified values range. The at least one counter is decremented before an execution of the command and incremented only when the command has been executed without interruption. The at least one counter here is settable multiple times, in particular even after the issuance of the data carrier to a user.
Claims15
-14. (canceled)
A method in a portable data carrier having at least one counter, comprising the steps:
- executing a specified command by the data carrier only when the at least one counter lies in a specified values range;
- decremating the at least one counter before an execution of the command and incrementing the at least one counter only when the command has been executed without interruption;
- and
- setting the at least one counter after an issuance of the data carrier to a user.
A portable data carrier comprising at least one memory and a processor which is configured to execute a command stored in the memory, and at least one counter to safeguard the command,
- the data carrier being configured to execute the command only when the at least one counter lies in a specified values range, and to decrement the at least one counter before an execution of the command and to increment it only when the command has been executed without interruption;
- said at least one counter being arranged to be settable after an issuance of the data carrier to a user.
Dependencies are inferred from the claim text.