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Multi-step digital signature method and system

  • US 5,825,880 A
  • Filed: 06/04/1997
  • Issued: 10/20/1998
  • Est. Priority Date: 01/13/1994
  • Status: Expired due to Term
First Claim
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1. A digital signing method comprising steps of:

  • generating shares of a private signature key;

    storing shares in separate electronic signing devices;

    certifying multiple authorizing agents for signing devices; and

    for each of a plurality of signing devices, affixing a partial signature to an electronic message in response to authorization from a minimum number of authorizing agents;

    wherein a plurality of partial signatures constitutes a digital signature.

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