IFX Mail Archive: RE: IFX> Some comments by Lexmark on PDF/is

IFX Mail Archive: RE: IFX> Some comments by Lexmark on PDF/is

RE: IFX> Some comments by Lexmark on PDF/is

From: Buckley, Robert R (RBuckley@crt.xerox.com)
Date: Thu Dec 19 2002 - 14:53:54 EST

  • Next message: Rick Seeler: "RE: IFX> Some comments by Lexmark on PDF/is"

    Don's comment reminded me of another comment I received this week in
    connection with the PDF/is review.

    Acrobat assigns "Adobe.PPKLite" as a fixed handler name for PKI-based
    signature/encryption by Self-Sign. It means that we have no choice but
    signature/encryption by Self-Sign, when we use Acrobat. If Self-Sign can
    deal with certificates issued by CA (Certificate Authority), third
    vendors which have CAs will be freed from the burden of offering their
    plug-ins. However, at the same time, they won't be able to expand their
    unique business by their plug-ins. The preference is to make handler
    names user definable; a handle name such as "Adobe.PPKLite" should be
    a default, not fixed.

    In addition, file format exchange is not easy when signatured/encrypted
    in PKI-base. Private Keys are required for re-signature and decryption.
    Another problem is whether automatic re-signature is acceptable or not.

    -----Original Message-----
    From: don@lexmark.com [mailto:don@lexmark.com]
    Sent: Thursday, December 19, 2002 1:21 PM
    To: ifx@pwg.org
    Subject: IFX> Some comments by Lexmark on PDF/is


    This is not an exhaustive list of Lexmark's comments but are a group
    dealing with intellectual property.

    1) Do we have a patent letter of assurance from IBM and any other holders
    of IP on JBIG2?

    2) What is Adobe's position on PPK-Lite? Are there patents? Are they
    licensed RF?

    3) Are there any other known IP issues with Digital Signatures? If so,
    should they be noted?

     Don Wright don@lexmark.com

     Member, IEEE SA Standards Board
             PatCom Chair, SCC Liaison
     Member, IEEE-ISTO Board of Directors
     f.wright@ieee.org / f.wright@computer.org

     Director, Alliances & Standards
     Lexmark International
     740 New Circle Rd
     Lexington, Ky 40550
     859-825-4808 (phone) 603-963-8352 (fax)

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