Identification document and related methods
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United States of America Patent
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Nov 15, 2011
Grant Date -
Jan 18, 2007
app pub date -
Sep 25, 2006
filing date -
Nov 19, 1998
priority date (Note) -
In Force
status (Latency Note)
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Abstract
The present disclosure relates generally to identification documents and related methods and apparatus. One claim recites a method to determine whether to authenticate an identification document through digital watermarking or through an alternative process. The method includes: receiving data carried by the identification document corresponding to a detection trigger; if the received data indicates an expected presence of digital watermarks, attempting to authenticate the identification document by analyzing digital watermarking carried by the identification document; and if the received data indicates an expected absence of digital watermarks, attempting to authenticate the identification document through an alternative process. Other claims and combinations are provided too.
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