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Re: <Q> Is there a business situation to illustrate this ?

From: Ken Goldman <kgold@watson.ibm.com>
Date: Thu, 8 Mar 2001 10:06:07 -0500
Message-Id: <200103081506.KAA35670@alpha.watson.ibm.com>
To: w3c-ietf-xmldsig@w3.org

I think this is saying - for example - that I should be able to add or
delete part of a document without invalidating the signature on the
rest of the document.

For example, a bank issues a signed letter of credit.  Signed
reference #1 is the amount and dates of availability.  Signed
reference #2 is the repayment terms and collateral.  I want to be able
to present signed element #1 to a third party as proof that I have the
credit, but detach element #2, which contains confidential data.

Another.  A merchant receives a signed #1 payment and #2 invoice.  The
merchant wants to send the payment on to his bank, but detach the
invoice, which is private - between the buyer and seller.

Another.  a merchant is sending the payment on to his bank, and wants
to add deposit account information.

> From: "XML DSig" <xmldsig@hotmail.com>
> Date: Thu, 08 Mar 2001 15:36:29 +0530
> The XML-Signature requirements document in
> section 3.2 Format mentions
> XML Signature must provide a mechanism that facilitates the
> production of composite documents - by addition or deletion
> -- while preserving the signature characteristics of the cnsitituent
> parts.
> I will appreciate inputs in terms of a business / real-life situation
> to understand this point better.

Ken Goldman   kgold@watson.ibm.com   914-784-7646
Received on Thursday, 8 March 2001 10:06:42 UTC

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