Identification document including embedded data
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
N/A
Issued Date -
Nov 21, 2002
app pub date -
Mar 6, 2002
filing date -
Jul 27, 1995
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
The present invention relates to coordinating information carried by a digital watermark and other machine-readable codes. In one implementation, an identification card includes a digital watermark and a barcode encoded with information. The digital watermark includes a hash of the barcode information. To determine authenticity of the identification card, the hash is compared with the barcode information. The card is considered authentic when the hash and barcode information match or otherwise satisfy a predetermined relationship.
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