RE: Digital Envelope: Food for thought by the next generation

[Martin W Sachs <mwsachs@us.ibm.com>]

Dick,

It looks like you and I are the only ones around these days.  I guess
everyone else is worn out from Vienna :-)

You may have the right answer but I am not sure.  Digital Envelope is not a
packaging function as I understand packaging.  It is an RSA encryption
procedure.  The message is encrypted by symmetric encryption and the secret
keys are exchanged by public-key encryption.

I guess a parallel question is who does the signing.  If you tell me that
signing is done above the message service handler, then I guess I could
agree that message-level encryption is also above the MSH.


Regards,
Marty



*************************************************************************************

Martin W. Sachs
IBM T. J. Watson Research Center
P. O. B. 704
Yorktown Hts, NY 10598
914-784-7287;  IBM tie line 863-7287
Notes address:  Martin W Sachs/Watson/IBM
Internet address:  mwsachs @ us.ibm.com
*************************************************************************************



Dick Brooks <dick@8760.com> on 05/16/2001 12:50:14 PM

Please respond to dick@8760.com

To:   Martin W Sachs/Watson/IBM@IBMUS, ebxml-tp@lists.ebxml.org,
      ebxml-transport@lists.ebxml.org
cc:   Maryann Hondo/Austin/IBM@IBMUS
Subject:  RE: Digital Envelope:  Food for thought by the next generation



Marty,

It appears to me the Digital Envelope element is used to describe payload
packaging. If
my understanding is correct then I don't believe the Message Service (MS)
needs to know about the
Digital Envelope. It's whatever layer above the MS that is responsible for
packaging the
payload that needs this information.

The MS spec assumes that a payload item is "packaged" for transport and the
MS is only responsible
for "inserting" the payload into the ebXML Message as a MIME body part.  At
least that is my understanding.


Dick Brooks
Group 8760
110 12th Street North
Birmingham, AL 35203
dick@8760.com
205-250-8053
Fax: 205-250-8057
http://www.8760.com/

InsideAgent - Empowering e-commerce solutions

> -----Original Message-----
> From: Martin W Sachs [mailto:mwsachs@us.ibm.com]
> Sent: Wednesday, May 16, 2001 9:17 AM
> To: ebxml-tp@lists.ebxml.org; ebxml-transport@lists.ebxml.org
> Cc: Maryann Hondo
> Subject: Digital Envelope: Food for thought by the next generation
>
>
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>
> It was just pointed out to me by an IBM colleague that while the CPP/CPA
> specification includes a Digital Envelope element, the Message Service
> Specification says nothing about it.  To me, this looks like a TRP-TP
> coordination item that fell through the cracks and should resurface in
the
> next life.
>
> Does anyone know if Digital Envelope is usable in spite of the
> fact that it
> isn't explicitly mentioned in the Message Service Specification?
>
> Regards,
> Marty
>
> ******************************************************************
> *******************
>
> Martin W. Sachs
> IBM T. J. Watson Research Center
> P. O. B. 704
> Yorktown Hts, NY 10598
> 914-784-7287;  IBM tie line 863-7287
> Notes address:  Martin W Sachs/Watson/IBM
> Internet address:  mwsachs @ us.ibm.com
> ******************************************************************
> *******************
>
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