Digitally watermarking checks and other value documents
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
N/A
Issued Date -
Mar 20, 2003
app pub date -
Aug 30, 2002
filing date -
Mar 17, 1994
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
The present invention provides various techniques for encoding hidden information in checks and other security documents. The hidden information provides an authentication tool. In one implementation, we provide a method for encoding a security document with information. The security document includes a substrate having printing thereon. The information is hidden in the printing and corresponds to text or numbers conveyed by at least a portion of the printing. The method includes dividing the information into a plurality of payload sets, wherein each payload set includes a sub-set of the information, and encoding the payload sets across the substrate. The plurality of payload sets is concatenated in order to retrieve the information.
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