Authentication methods and systems including embedded...

Registers – Systems controlled by data bearing records – Credit or identification card systems

Reexamination Certificate

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C382S115000

Reexamination Certificate

active

07806322

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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