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Document management system and method

  • US 8,484,477 B2
  • Filed: 01/30/2011
  • Issued: 07/09/2013
  • Est. Priority Date: 01/30/2011
  • Status: Active Grant
First Claim
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1. A document management system, comprising:

  • a processing device;

    a secure authoring tool including computer readable code, embodied on a tangible, non-transitory, computer readable medium, the code being executable by the processing device, the secure authoring tool including at least one of a number generator or a secure controller;

    a document generated using the secure authoring tool, the document including a map-file for each of a plurality of participants in a workflow of the document, each map-file providing differential access for a respective one of the plurality of participants;

    i) corresponding, randomly generated nonces;

    or ii) complementary workflow assurance tokens;

    or iii) both i and ii distributed within the respective map-files of neighboring participants by the number generator or the secure controller, wherein;

    a) a first of the nonces is provided in the map-file of a sending one of the neighboring participants, a second of the nonces is provided in the map-file of a receiving one of the neighboring participants, and the first and second nonces are identical;

    orb) the complementary workflow assurance tokens include a pair of specially generated signature and verification keys, the specially generated signature key is provided in the map-file of a receiving one of the neighboring participants, and the specially generated verification key is provided in the map-file of a sending one of the neighboring participants;

    orc) both a and b;

    a private key that recovers at least one of the second nonce or the specially generated signature key; and

    a communication mechanism enabling transmission of at least one of the recovered second nonce or a signature generated by the receiving one of the neighboring participants using the recovered specially generated signature key to a sending one of the neighboring participants for verification using at least one of the first nonce or the specially generated verification key.

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