Long-term authenticity proof of electronic documents
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United States of America Patent
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Mar 6, 2012
Grant Date -
Apr 6, 2006
app pub date -
Sep 30, 2005
filing date -
Sep 30, 2004
priority date (Note) -
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Abstract
Systems, methods and computer program products are disclosed for providing long-term authenticity proof of an electronic document having a digital signature, wherein the electronic document is digitally signed with a digital signature and the electronic document and its digital signature are archived in a data archive. Such methods, systems and computer program products may store the electronic document in a first data archive and store a hash value of the electronic document in a second data archive different from the first data archive. Long-term authenticity and integrity may be achieved by periodically re-signing, particularly time stamping the hash value in the second data archive.
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