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Method and apparatus for providing verifiable digital signatures

  • US 6,848,048 B1
  • Filed: 10/13/2000
  • Issued: 01/25/2005
  • Est. Priority Date: 10/13/2000
  • Status: Expired due to Fees
First Claim
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1. A digital signature method, comprising:

  • converting, on a computer system, digital data representative of a document into a predetermined format;

    applying the predetermined format and a viewer program to a hash function to mathematically operate on the predetermined format and the viewer program and provide a message digest, the viewer program for viewing the predetermined format that is a representation of the document; and

    encrypting the message digest using a private key to provide a digital signature.

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