Method and apparatus for verifying secure document timestamping
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United States of America Patent
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Nov 1, 2011
Grant Date -
N/A
app pub date -
Sep 29, 2006
filing date -
Mar 21, 1996
priority date (Note) -
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status (Latency Note)
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Abstract
According to one embodiment of the invention, a method is provided for receiving a timestamp from a caller via a telephone connection; receiving a device identifier from the caller, in which the device identifier identifies a device; determining a cryptographic key based on the device identifier; determining an indication of a time based on the timestamp and the cryptographic key; providing the indication of the time to the caller; determining an account; and charging a fee to the account.
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