IC card
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United States of America Patent
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-
Aug 13, 1991
Grant Date -
N/A
app pub date -
Oct 12, 1990
filing date -
Jun 15, 1990
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An IC card with a product test program contained therein is provided with a read-only memory. This read-only memory stores various routines, and is arranged such that if a secret code assigned exclusively to that IC card has been already written in a non-volatile memory in the IC card, an externally entered secret code is collated with the stored secret code, and, if the collation is successful, the non-volatile memory is initialized. The test program can be executed only after the initialization has been completed.
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