Integrated circuit for embedding in smart cards, and method of issuing smart cards
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United States of America Patent
Stats
-
Oct 9, 2001
Grant Date -
N/A
app pub date -
Dec 14, 1998
filing date -
Dec 26, 1997
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
An integrated circuit embedded in a smart card has a rewritable non-volatile memory in which an instruction file is stored. A control logic circuit in the integrated circuit converts random data into authentication data by executing instructions read from the instruction file, preferably by controlling a simplified data processing circuit having a shift register, an exclusive-OR logic circuit, and specialized bit operation circuits. A card issuer issuing smart cards including this integrated circuit writes different instruction files in different smart cards, thereby enhancing the security of the smart cards.
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