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Methods, Apparatus And Computer Programs For Generating And/Or Using Conditional Electronic Signatures For Reporting Status Changes

  • US 20080126805A1
  • Filed: 11/24/2003
  • Published: 05/29/2008
  • Est. Priority Date: 12/21/2002
  • Status: Active Grant
First Claim
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1. A method for generating a conditional electronic signature, performed in response to one or more conditions being specified for an electronic signature of a data item, the method comprising the steps of:

  • encrypting the data item,encrypting the one or more conditions separately from the data item, combining the encrypted data item and the encrypted one or more conditions, andencrypting the combination to generate a digital signature block that inherently represents the data item and the one or more conditions and enables cryptographic verification of both the data item and the one or more conditions.

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