Methods and systems for signing physical documents and for authenticating signatures on physical documents
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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Issued Date -
Jan 18, 2007
app pub date -
Jul 13, 2006
filing date -
Jul 13, 2005
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
In a method for providing physical documents with a signature, a document code is derived from at least a part of a content of the physical document. A signature code is derived at least from the document code and from an identification code of a signing party. The physical document is provided with a signature marking representing the signature code. Optionally, the physical document is provided with a document marking representing the document code. A signature provided on a physical document may be authenticated. During authentication, a signature marking provided on the physical document is detected. The signature marking represents a signature code. Then, the signature code is derived from the detected signature marking. Content data representing at least a part of the content of the physical document is received and a first document code is derived from the content data. Then, a relationship between the signature code, an identification code of a signing party and the first document code is determined. The signature is validated in case the relationship satisfies a validation criterion.
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