Time stamping system for electronic documents and program medium for the same
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United States of America Patent
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Sep 4, 2007
Grant Date -
Aug 21, 2003
app pub date -
Jan 10, 2003
filing date -
Feb 20, 2002
priority date (Note) -
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Abstract
A time stamping system for electronic documents has a document preparation device and a time stamp issuing server. The document preparation device includes an electronic document reading device that reads an electronic document. A digest value computer computes a digest value based on the read document. A transmitter transmits the computed digest value to the time stamp server with a request for a time stamp. A receiver receives the requested time stamp from the time stamp server and an electronic writer writes the received time stamp into the electronic document.
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