I prefer the approach Mike is proposing.   It is overall simper and less 
restructuring.

John B.
On 2013-06-25, at 7:18 PM, Mike Jones <[email protected]> wrote:

> http://tools.ietf.org/html/draft-jones-jose-aes-gcm-key-wrap-00 seems like a 
> substantially simpler approach 
> thanhttp://tools.ietf.org/html/draft-barnes-jose-key-wrapping-01.  This is 
> evident by several metrics:
> ·         Number of proposed changes:  The Jones draft proposes no changes to 
> any of the current specs.  It simply defines an encoding for GCM and adds 
> registry entries for it.  Whereas the Barnes draft proposes a major 
> restructuring – listing 4 major changes in the introduction and 4 smaller 
> changes.
> ·         Normative text size:  The Jones GCM key wrap approach requires only 
> 7 normative sentences in 1/2 page of text.  The Barnes draft has four pages 
> of normative text, along with an extensive introduction describing the 
> proposed complete restructuring of JWS and JWE.
>  
> We don’t need to boil the ocean with a total redesign to enable AEAD key 
> wrapping.  It can already easily be done with the current specs simply by 
> defining new algorithms.  The approach taken in 
> http://tools.ietf.org/html/draft-jones-jose-aes-gcm-key-wrap-00 would work 
> for any AEAD algorithm.
>  
>                                                                 -- Mike
>  
> From: [email protected] [mailto:[email protected]] On Behalf Of Jim 
> Schaad
> Sent: Tuesday, June 25, 2013 9:53 AM
> To: [email protected]
> Subject: [jose] Issue #13 - use AES-GCM for Key Wrapping
>  
> We now have two documents – one from Richard and one from Mike – which 
> provide the two different ways that have been proposed for doing key wrapping 
> with an AEAD algorithm.
>  
> Please review the two documents and provide comments to the list.
>  
> Jim
>  
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