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Digitized bank checks validated by digital signatures

  • US 20070140594A1
  • Filed: 12/16/2005
  • Published: 06/21/2007
  • Est. Priority Date: 12/16/2005
  • Status: Active Grant
First Claim
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1. In a process wherein original computer files, having original content, are generated;

  • 2) an original digital signature is generated for each original file;

    3) said original files are combined into a single archival file, wherein some original content is modified; and

    4) modification of content of an original file alters the digital signature of that file, a method comprising;

    a) deriving and storing recovery data; and

    b) using the recovery data to recover an original file and its original content from the archival file.

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