Methods and device for digitally signing data
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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Jun 28, 2005
Grant Date -
Sep 25, 2003
app pub date -
Aug 27, 2001
filing date -
Aug 27, 2000
priority date (Note) -
In Force
status (Latency Note)
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Abstract
Methods and device for digitally signing documents (140) by using a portable device (110) that encodes a signature string to sound. The acoustic signature string may be transmitted and then decoded (150) back into digital data. The signature string may be further processed to verify the signature of the document and to produce a certificate of identity and integrity for the document. The certificate of identity and integrity may be used to further identify and validate the document and its signer.
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