Electronic watermarking method, electronic information distribution system, image filing apparatus and storage medium therefor
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United States of America Patent
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-
Jan 28, 2003
Grant Date -
N/A
app pub date -
Jan 21, 1999
filing date -
Jan 27, 1998
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An electronic information distribution system that exchanges data across a network at the least comprises a first entity, including first encryption means, for performing a first encryption process for the original data, a second entity, including management distribution means for, at the least, either managing or distributing the data that are provided by the first encryption process, and including electronic watermark embedding means for embedding an electronic watermark in the data, and a third entity, including second encryption means for performing a second encryption of the data in which an electronic watermark is embedded.
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