W3C home > Mailing lists > Public > w3c-ietf-xmldsig@w3.org > October to December 1999

Re:AW: AW: ObjectReference shouldn't be signed, was RE: Loca

From: by way of <Raghavan.Srinivas@East.Sun.COM>
Date: Tue, 09 Nov 1999 22:48:32 -0500
Message-Id: <3.0.5.32.19991109224832.00a39c80@localhost>
To: "IETF/W3C XML-DSig WG" <w3c-ietf-xmldsig@w3.org>
Hi:

Based on the ensuing discussions at the 46th IETF meeting I
tried to reflect on this problem. 

There are at least two schools of thought.

1. Since the signature includes the objectreference, changing
   the URL for the reference should render the signature invalid.
   In an example quoted, the signature may probably
   be applicable based on the contents of the URL (for
   example some terms of agreement).

2. URLs can and will change and the way to override signature
   becoming invalid is to escape the objectreference from
   being included in the signature.
   
Why not effectively sign for the document and the contents
of the object reference, not the object reference itself?
This should address some of the issues of 1 & 2. i.e. 
changing the URL is fine as long as the contents don't
change ...

Does this seem reasonable?

Thanks!

Rags
    
	Resent-Date: Tue, 9 Nov 1999 11:15:44 -0500 (EST)
	Resent-Message-Id: <199911091615.LAA22897@www19.w3.org>
	From: rhimes@nmcourt.fed.us
	To: <w3c-ietf-xmldsig@w3.org>
	MIME-Version: 1.0
	Content-Transfer-Encoding: 7bit
	Content-Description: "cc:Mail Note Part"
	Subject: Re:AW: AW: ObjectReference shouldn't be signed, was RE: Loca
	Resent-From: w3c-ietf-xmldsig@w3.org
	X-Mailing-List: <w3c-ietf-xmldsig@w3.org> archive/latest/724
	X-Loop: w3c-ietf-xmldsig@w3.org
	Resent-Sender: w3c-ietf-xmldsig-request@w3.org
	
	
	>>The simplest example is a changing URL.
	
	>I know that example, but that happens so rarely that I would consider 
it
	>appropriate to resign.
	
	Peter,
	
	I don't think we should assume that there is one or a few signers of a 
set of
	documents under a URL domain, nor that the signers are readily available 
for
	re-signing.  Also, URLs change frequently on the web.  I suspect that 
once we
	have proliferation of XML signatures, the problem will be at least as 
common.
	
	Thanks,
	Rich
	
Received on Tuesday, 9 November 1999 22:48:36 GMT

This archive was generated by hypermail 2.2.0 + w3c-0.29 : Thursday, 13 January 2005 12:10:08 GMT