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public versus secret ... Re: Single Key in Originator Information

From: <dee3@us.ibm.com>
Date: Fri, 23 Apr 1999 15:13:49 -0400
To: w3c-xml-sig-ws@w3.org
Message-ID: <8525675C.0069E32D.00@D51MTA10.pok.ibm.com>
See comments indicated by ###...

Donald E. Eastlake, 3rd
17 Skyline Drive, Hawthorne, NY 10532 USA
dee3@us.ibm.com   tel: 1-914-784-7913, fax: 1-914-784-3833

home: 65 Shindegan Hill Road, RR#1, Carmel, NY 10512 USA
dee3@torque.pothole.com   tel: 1-914-276-2668



"Paul Lambert" <plambert@certicom.com> on 04/22/99 02:56:51 PM

To:   "Joseph M. Reagle Jr. (W3C)" <reagle@w3.org>
cc:   w3c-xml-sig-ws@w3.org (bcc: Donald Eastlake/Hawthorne/IBM)
Subject:  Re: Single Key in Originator Information


Joseph,

[...]

This restriction on syntax is one of the reasons I'm pushing on
differentiating the characteristics of a keyed hash versus public key
mechanisms.  Keyed hash mechanisms require a Recipient Info field.  Public
key techniques do not need to provide recipient unique information.

### Maybe I misunderstand but if the public key technique being used is
Diffie-Hellman and a recipient has many DH keys, is not "recipient unique
information", in particular an indication of which key to use, needed?

Paul

### Donald
Received on Friday, 23 April 1999 15:16:49 EDT

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