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Re: [secdir] Review of draft-manral-ipsec-rfc4305-bis-errata-02.txt

Nicolas Williams <Nicolas.Williams@sun.com> Mon, 11 December 2006 22:35 UTC

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Date: Mon, 11 Dec 2006 16:34:54 -0600
From: Nicolas Williams <Nicolas.Williams@sun.com>
To: Russ Housley <housley@vigilsec.com>
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References: <20061211155532.GB26832@binky.Central.Sun.COM> <457DC1E2.30206@ipinfusion.com> <20061211211932.GA26175@binky.Central.Sun.COM> <7.0.0.16.2.20061211172844.042844d8@vigilsec.com>
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Cc: secdir@mit.edu, iesg@ietf.org, Vishwas Manral <vishwas@ipinfusion.com>, ietf@ietf.org
Subject: Re: [secdir] Review of draft-manral-ipsec-rfc4305-bis-errata-02.txt
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On Mon, Dec 11, 2006 at 05:30:26PM -0500, Russ Housley wrote:
> Nico:
> 
> >Use of the NULL ESP algorithm implies no confidentiality protection,
> >while use of the NULL AH algorithm implies no integrity protection
> >(unless combined mode ESP algorithms are used).  And in general we want
> >IPsec used to provide integrity or confidentiality+integrity protection,
> >but not really just confidentiality protection.
> 
> I generally agree with your point.  Integrity protection is 
> important, but I am not sure that this is the document to drive this 
> point.  We have seen NULL encryption and NULL integrity algorithms 
> are very useful for debugging.

Right.  I am not suggesting a change of policy here, but rather an
explanation for the MUST NOT use NULL ESP and NULL AH together.

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