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System and method for graphical indicia for the certification of records

  • US 20020129241A1
  • Filed: 04/26/2001
  • Published: 09/12/2002
  • Est. Priority Date: 09/22/1997
  • Status: Active Grant
First Claim
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1. A method for providing security with respect to who provided digital data at what time, said method comprising the steps of:

  • performing a serially chained certification process including;

    a) forming a first interval certification at a first server including the server'"'"'s identification, the start time of an interval chain in UTC, the start time of the interval in UTC, the stop time of the interval, a public key for the interval, a digital signature for the interval, signed by a previous interval'"'"'s private key, and a digital signature for the interval, signed by the interval'"'"'s private key;

    (b) upon expiration of the first interval, destroying its private key;

    c) continuing steps (a) and (b) for second, third, and following intervals so that intervals are cross-chained with other servers to form a widely witnessed, temporal web of signed intervals of time;

    encoding certification information in graphical form to form an indicia that relates to the authenticity of the document.

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