Program writable integrated circuit card and method therefore
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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May 4, 2004
Grant Date -
N/A
app pub date -
Jul 31, 1997
filing date -
Sep 3, 1996
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An IC card and a method thereof for adding or changing a program for a memory for writing without adversely affecting the function of the IC card and by keeping the security of a program to be written later by restricting writing by a write control program having a decryption function or a program code conversion function.
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