Patent ID: 9298533
Filing Date: 2016-03-29
CPC Classification: G06F,G07F

Claim Text:
1. A method in a portable data carrier, comprising: executing a specified command by the data carrier only when at least one counter of the data carrier lies in a specified values range, each command having its own counter that separately secures execution of that command, wherein the at least one counter is actuated only when there is a valid entry present in a rollback buffer of the data carrier, the valid entry indicating that a preceding execution of a command has been interrupted by a disturbance, a default invalid entry indicating no disturbance, and upon finding the valid entry, the data carrier writing original content of memory temporarily stored in the rollback buffer back to a memory area, wherein the data carrier or at least a command that is secured by the at least one counter is deactivated when the at least one counter leaves the specified values range.