Certificate issuing method and certificate verifying method
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United States of America Patent
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N/A
Issued Date -
Sep 22, 2005
app pub date -
Feb 10, 2005
filing date -
Feb 13, 2004
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
The board issuing/managing system is provided with a processing unit to manage a board ID number and a processing unit to write a coded ID number into board data. Further, the certificate issuing system is provided with a processing unit to give an electronic signature of a certificate issuer to associated data to be written over the board data; a processing unit to transform encrypted associated data into code information that can be read by an information processing device; a processing unit to insert the board ID number as an electronic watermark when the associated data includes image data; and a processing unit to arrange the code information, the image data and the associated data on the board so that they do not overlap each other.
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