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Method and apparatus for improved digital message transaction model

  • US 5,781,635 A
  • Filed: 12/29/1995
  • Issued: 07/14/1998
  • Est. Priority Date: 12/29/1995
  • Status: Expired due to Term
First Claim
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1. A machine-readable medium having contained:

  • at least one non-certificate data block;

    at least one prior certificate;

    a new certificate which certifies a combination of less than all of a union of the at least one non-certificate data block and the at least one prior certificate; and

    a user interface for selecting the new certificate and for rendering the new certificate in human readable form.

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