Storage medium for preventing an irregular use by a third party
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United States of America Patent
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Aug 28, 2007
Grant Date -
N/A
app pub date -
Dec 30, 1999
filing date -
Mar 16, 1992
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A storage medium stores encrypted electronic data, a medium personal number which is unique for each storage medium and encrypted permission information. At least the medium personal number is written onto the storage medium in an un-rewritable form which a user computer cannot rewrite.
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