Authentication of objects using steganography
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United States of America Patent
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Mar 24, 2009
Grant Date -
Jul 17, 2008
app pub date -
Oct 26, 2007
filing date -
Apr 21, 2000
priority date (Note) -
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Abstract
Steganographic methods for encoding auxiliary data into a host signal are used to authenticate physical and electronic objects. One claim recites an object comprising: a first graphic provided on an object surface, and a storage device carried by the object. The storage device includes a second graphic stored therein. The first and second graphics are related graphics, and the second graphic includes first steganographic encoding including a plural-bit payload. Of course, other combinations are provided as well.
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