Authentication using a digital watermark
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United States of America Patent
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Aug 6, 2013
Grant Date -
Feb 5, 2004
app pub date -
Nov 1, 2002
filing date -
Nov 18, 1993
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A method and apparatus for identifying an object include encoding physical attributes of an object where the encoded information is utilized as at least one element for composing a digital watermark for the object. In another embodiment the physical attributes of the object are utilized as a key for accessing information included in a digital watermark for the object.
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