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Re: [OAUTH-WG] MAC: Cookie name or value as MAC key id

Eran Hammer-Lahav <eran@hueniverse.com> Tue, 14 June 2011 05:47 UTC

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From: Eran Hammer-Lahav <eran@hueniverse.com>
To: "Manger, James H" <James.H.Manger@team.telstra.com>, oauth <oauth@ietf.org>
Date: Mon, 13 Jun 2011 22:47:36 -0700
Thread-Topic: MAC: Cookie name or value as MAC key id
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Subject: Re: [OAUTH-WG] MAC: Cookie name or value as MAC key id
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> -----Original Message-----
> From: oauth-bounces@ietf.org [mailto:oauth-bounces@ietf.org] On Behalf
> Of Manger, James H
> Sent: Monday, June 13, 2011 6:11 PM

> There have been suggestions that the MAC calculation could/should cover
> the key id. In that situation it is even more crucial that the id field isn't just a
> name referring to the real value elsewhere - as then the security changes
> based on the syntax used to issue the credentials.

What suggestions? We could not come up with any reason to include the key identifier in the normalized string.

EHL

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