Method and apparatus for embedding authentication information within digital data
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United States of America Patent
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Sep 5, 2000
Issued Date -
N/A
app pub date -
Nov 17, 1998
filing date -
Dec 14, 1994
priority date (Note) -
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Abstract
Arbitrary digital information is embedded within a stream of digital data, in a way that avoids detection by a casual observer and that allows a user to determine whether the digital data have been modified from their intended form. The embedded information may only be extracted as authorized an may be used to verify that the digital data stream has bee modified.
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