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Implementing digital signatures for data streams and data archives

  • US 5,958,051 A
  • Filed: 01/09/1997
  • Issued: 09/28/1999
  • Est. Priority Date: 11/27/1996
  • Status: Expired due to Term
First Claim
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1. A computer-implemented method for verifying the authenticity of data, the method comprising:

  • a) receiving at least one data file and a signature file, wherein the data file and the signature file are separate, the data file including a first identifier, the signature file including a representation of the first identifier for the data file and a digital signature, the signature file being arranged to include representations of identifiers for additional data files; and

    b) processing the signature file using a computer system to determine the authenticity of the signature file;

    c) comparing the first identifier in the data file with the representation of the first identifier in the signature file using the computer system to determine the authenticity of the data file, wherein processing the signature file further includes processing the digital signature using the computer system to determine the authenticity of the signature file; and

    d) marking the data file as signed when the first identifier in the data file and the representation of the first identifier in the signature file match.

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