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Method and apparatus for the secure identification of the owner of a portable device

  • US 8,132,012 B2
  • Filed: 12/19/2008
  • Issued: 03/06/2012
  • Est. Priority Date: 02/25/1999
  • Status: Expired due to Fees
First Claim
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1. A method for signing a document by a holder of a portable device, comprising the steps of:

  • computing a one time password at the portable device, wherein the one time password is a function of a time information;

    replacing a portion of the one time password with a time indicia; and

    writing the one time password on the document.

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  • 5 Assignments
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