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Validation stamps for electronic signatures

  • US 5,898,156 A
  • Filed: 08/29/1996
  • Issued: 04/27/1999
  • Est. Priority Date: 08/29/1996
  • Status: Expired due to Term
First Claim
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1. A validation stamp for protecting the integrity of an electronic signature on a document, wherein said document includes a body and a document signature, said document signature including geometric information corresponding to said electronic signature, said validation stamp comprising:

  • a validation signature including timing information corresponding to said electronic signature for ensuring that said electronic signature is a valid signature; and

    a validation body identical to at least a portion of said document body for determining whether said electronic signature was originally intended for said document.

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