| 摘要 |
In an IC card, the value of a monitoring flag is set to an initial value which serves as a predetermined value when all processes corresponding to commands for outputting data are normally performed, in a memory of an IC chip. The value of the monitoring flag is set depending on the execution states of the various processes corresponding to the commands for outputting the data. When the processes prior to data output are completed, data to be output is masked on the basis of the value of the monitoring flag, and the masked data is output using a communication interface.
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