Digital watermarking systems
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Sep 19, 2006
Issued Date -
N/A
app pub date -
Feb 21, 2001
filing date -
May 1, 2000
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A variety of systems responsive to watermarked documents are detailed. In one, watermarking is employed to facilitate secure online transactions. In another, a system for exchanging data is provided. One system includes a user terminal and a central site. The user terminal includes a watermark reader, and a capture device to capture an image of a watermarked document. The central site includes a database of image hashes. The user terminal communicates with the central site. The watermark reader reads a watermark and computes a hash of a captured image, and passes the hash to the central site for comparison with the database of image hashes.
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