Personal document authentication system using watermarking
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United States of America Patent
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N/A
Issued Date -
Jul 24, 2003
app pub date -
Dec 20, 2002
filing date -
May 8, 1995
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
An identification document includes a unique identifier, and a picture of a person. Steganographically embedded in the picture is information corresponding to the identifier, by which the document can be authenticated. A verification apparatus reads the identifier from the document (e.g., by OCR or a machine-readable feature), and collects scan data corresponding to the picture. The scan data is processed to extract the embedded information. The embedded information is then compared for expected correspondence with the identifier. A remote database can store information related to the card, and can be queried in connection with the authentication.
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