Electrical computers and digital processing systems: support – Multiple computer communication using cryptography – Particular communication authentication technique
Reexamination Certificate
2006-04-11
2006-04-11
Hua, Ly V. (Department: 2135)
Electrical computers and digital processing systems: support
Multiple computer communication using cryptography
Particular communication authentication technique
C713S152000, C380S059000
Reexamination Certificate
active
07028188
ABSTRACT:
A method for authenticating a document in which a document key for the document is generated by examining one or more attributes of a physical media that underlies the document. An original image is then imparted onto the physical media so that the original image is associated with the document key in a way that enables a subsequent recovery of the document key from the original image. This tying together of the underlying physical media, through the document key, with an original image enables detection of a forgery which was performed either through an alteration of the original image, or ink stripping and re-printing, or a printing of the original image on another physical media.
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Copy of European Patent Office Search Report dated May 28, 2003 showing the relevant passages of the above referenced French Patent.
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