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Multi-purpose transaction card system

  • US 20030097344A1
  • Filed: 08/12/2002
  • Published: 05/22/2003
  • Est. Priority Date: 01/11/1994
  • Status: Active Grant
First Claim
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1. A method for public-key digital authentication of messages, comprising the steps of:

  • creating a private key by a signing party;

    making a public key, corresponding to said private key of said signing party, verifiable by at least a receiving party;

    creating a set of one-time signatures;

    forming a compression hierarchy of said one-time signatures;

    forming a public key digital signature, verifiable with said public key, on said compression hierarchy;

    storing edges of said compression hierarchy by an endorser;

    endorsing by signing with at least one of said one-time, signatures and providing stored edge values;

    verification of said one-time signature and said edge values supplied and said digital signature on said compression values; and

    accomplishing the foregoing by said endorser storing substantially less than all edges and computing before each endorsement substantially less than all edges.

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