Content data judging apparatus
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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Dec 7, 2004
Grant Date -
N/A
app pub date -
Jun 16, 2000
filing date -
Jun 22, 1999
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Content data is judged to determine whether data prepared by a digital device were altered by performing an authentication process using a medium on which content data are recorded; reading the content data from the medium; embedding, in the content data, data for verifying the pertinent content; extracting, from the content data, the data for verifying the pertinent contents; using the results of the extraction to determine whether the content data were altered. Preferably, the means includes means for identifying any portion containing altered data.
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