Embedding information in digital image data
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United States of America Patent
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Oct 19, 2004
Grant Date -
N/A
app pub date -
Jan 29, 1999
filing date -
Jan 30, 1998
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A data processing apparatus has a first embedding unit adapted to embed first information in digital image data in accordance with a first embedding method which utilizes publicly available information. The apparatus also has a second embedding unit adapted to embed second information in the digital image data having the first information embedded therein in accordance with a second embedding method which utilizes secret information that is not made publicly available, the second information being used to detect whether the first information is altered.
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