Embedded optical signatures in documents

Details Embedded optical signatures in documents Embedded optical signatures in documents

2007-08-07

2007-08-07

Le, Thien M. (Department: 2876)

Registers

Systems controlled by data bearing records

C235S454000, C235S494000

Reexamination Certificate

active

11014159

ABSTRACT:
A method of embedding an optical signature in a document and document produced therefrom. The optical signature is an optical pattern generated from a known value, such as a mathematical, geometric, trigonometric, size, phase, and the like, and the same value can be generated from examination of a document having the embedded optical pattern. The document can be validated, authenticated, or the determination of a valid copy of an original document with the embedded optical signature made through comparison of the known value and the value generated from the optical pattern on the document. The optical pattern can also be generated from other identification codes on the document.

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