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Method and apparatus for secure key delivery for decrypting bulk digital content files at an unsecure site

  • US 8,130,963 B2
  • Filed: 12/11/2007
  • Issued: 03/06/2012
  • Est. Priority Date: 07/08/2003
  • Status: Active Grant
First Claim
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1. A method comprising:

  • a server computing device encrypting each of a plurality of digital content documents with a corresponding key to generate corresponding encrypted document content for each of the plurality of digital content documents;

    the server computing device computing for each digital content document a document identifier that is computed from, but cannot be derived solely from, each digital content document'"'"'s corresponding encrypted document content, wherein the computing for each digital content document a document identifier further includes using a text string embedded in program code in the server computing device;

    the server computing device creating a key pair list of document identifier and decryption key pairs;

    the server computing device assembling each digital content document'"'"'s corresponding encrypted document content and the key pair list into a distribution archive file; and

    the server computing device encrypting the distribution archive file with a scheduled key unique to the distribution archive file.

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