Don's comment reminded me of another comment I received this week in
connection with the PDF/is review.
Rob
==============
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 at lexmark.com [mailto:don at lexmark.com]
Sent: Thursday, December 19, 2002 1:21 PM
To: ifx at pwg.org
Subject: IFX> Some comments by Lexmark on PDF/is
All:
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?
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Don Wright don at lexmark.com
Member, IEEE SA Standards Board
PatCom Chair, SCC Liaison
Member, IEEE-ISTO Board of Directors
f.wright at ieee.org / f.wright at 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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