RE: [ubl-tsc] [Fwd: [ubl-psc] Proposal for a signature refenrence]

Hi Peter, Tim,

Sorry for the late response. We have reviewed the proposal for signature reference. Below is our comment:-

The signature reference calls for the usage of detached signature. This would be useful in scenario where binary data is involved and where the referenced signature is always available and accessible via the specified URL
Both ebXML messaging service and COML however uses the enveloped approach, wherein the digital signature (digsig) is embedded inside the message itself. In the case of COML, XPath is being used to reference the appropriate section of the payload that needs the digsig. This is a preferred approach where we need to perform online verification of digsig. Hence, there will not be a need to make reference to an external resource, which may not be available at the time when the digsig verification is being performed. This reduces the possibility of digsig failure.

We would urge that you study the COML approach in handling digsig for XML payload.

Regards

Kama

UBL TSC Chair

-----Original Message-----
From: Tim McGrath [mailto:tmcgrath@portcomm.com.au]
Sent: Tuesday, September 13, 2005 9:06 PM
To: ubl-tsc@lists.oasis-open.org
Subject: [ubl-tsc] [Fwd: [ubl-psc] Proposal for a signature refenrence]

forwarded from Peter Borresen.

this is a sample isnatcen of his propsoed digital signature approach. can we get some technical feedback on the suitability of this for our needs.

-------- Original Message --------

Subject:	[ubl-psc] Proposal for a signature refenrence
Date:	Tue, 13 Sep 2005 14:11:49 +0200
From:	Peter Larsen Borresen <plb@itst.dk>
To:	ubl-psc@lists.oasis-open.org, "'ytlee@cecid.hku.hk'" <ytlee@cecid.hku.hk>
CC:	'jon.bosak@sun.com' <jon.bosak@sun.com>

Hallo Thomas and Procurement subcommitee

Please find my proposal for a signature reference in the  xml-spy screen

dump and xml example file.

Best regards

Peter L. Borresen

 <<SignatureReference.gif>>  <<UBL-Order-1.0-Office-Example_with

signatureReference.xml>>

--

regards

tim mcgrath

phone: +618 93352228

postal: po box 1289   fremantle    western australia 6160

DOCUMENT ENGINEERING: Analyzing and Designing Documents for Business Informatics and Web Services

http://mitpress.mit.edu/catalog/item/default.asp?sid=632C40AB-4E94-4930-A94E-22FF8CA5641F&ttype=2&tid=10476

ubl-tsc message