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RE: I-D ACTION:draft-ietf-smime-multisig-01.txt

2007-06-28 14:11:41

Note that this resurrects an expired draft very little changed. 

-----Original Message-----
From: owner-ietf-smime(_at_)mail(_dot_)imc(_dot_)org 
On Behalf Of Internet-Drafts(_at_)ietf(_dot_)org
Sent: Thursday, June 28, 2007 3:50 PM
To: i-d-announce(_at_)ietf(_dot_)org
Cc: ietf-smime(_at_)imc(_dot_)org
Subject: I-D ACTION:draft-ietf-smime-multisig-01.txt 

A New Internet-Draft is available from the on-line Internet-Drafts
This draft is a work item of the S/MIME Mail Security Working Group of the

        Title           : Multiple Signatures in S/MIME
        Author(s)       : S. Turner, et al.
        Filename        : draft-ietf-smime-multisig-01.txt
        Pages           : 17
        Date            : 2007-6-28
CMS SignedData includes the SignerInfo structure to convey per-signer 
   information. SignedData supports multiple signers and multiple 
   signature algorithms per-signer with multiple SignerInfo structures. 
   If a signer attaches more than one SignerInfo, there are concerns 
   that an attacker could perform a downgrade attack by removing the 
   SignerInfo(s) with the 'strong' algorithm(s). This document defines 
   the multiple-signatures attribute, its generation rules, and its 
   processing rules to allow signers to convey multiple SignerInfo while 
   protecting against downgrade attacks. Additionally, this attribute 
   may assist during periods of algorithm migration.

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