Method and apparatus for providing secure time stamps for documents and computer files
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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-
Mar 27, 2001
Grant Date -
N/A
app pub date -
May 29, 1997
filing date -
May 29, 1997
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
Secure time stamps generated by the inventive apparatus and method include an externally generated time signal, such as a GPS signal, a time stamp serial number, generated through an irreversible process which may not be duplicated by the apparatus, and one or more check sum values used to verify the content of the time stamp parameters or any data file associated with the time stamp. Also disclosed are apparatus and methods for verifying the authenticity of previously generated time stamps in either electronic or tangible form. The time stamp generator apparatus may be implemented as an add-on board to an existing computer system or as a stand alone device which may also include a GPS receiver and a scanner for verifying previously generated time stamps.
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