Authentication methods and systems including embedded auxiliary data
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United States of America Patent
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Oct 5, 2010
Grant Date -
Jul 26, 2007
app pub date -
Dec 19, 2006
filing date -
Feb 12, 2002
priority date (Note) -
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Abstract
The present invention generally relates to steganography and digital watermarking. An authentication method is provided in one embodiment. The method includes receiving an object including a host object and auxiliary data steganographically embedded within the host object; determining geometric characteristics of the host object relative to expected geometric characteristics of the host object; and detecting the auxiliary data from the host object. The method can further include re-aligning or correcting geometric characteristics of the object based on a result of the act of determining prior to the act of detecting. Other embodiments, method and apparatus and described as well.
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