Re: [homenet] Kathleen Moriarty's Discuss on draft-ietf-homenet-hncp-09: (with DISCUSS)

Henning Rogge <hrogge@gmail.com> Wed, 18 November 2015 16:04 UTC

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From: Henning Rogge <hrogge@gmail.com>
Date: Wed, 18 Nov 2015 17:04:14 +0100
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To: Ted Lemon <mellon@fugue.com>
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Cc: homenet-chairs@ietf.org, "homenet@ietf.org Group" <homenet@ietf.org>, The IESG <iesg@ietf.org>
Subject: Re: [homenet] Kathleen Moriarty's Discuss on draft-ietf-homenet-hncp-09: (with DISCUSS)
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On Wed, Nov 18, 2015 at 4:46 PM, Ted Lemon <mellon@fugue.com>; wrote:
> Wednesday, Nov 18, 2015 9:20 AM Steven Barth wrote:
>> The basic idea behind the SHOULD is that there may be cases where either
>> physical security of links (e.g. cables) can be ensured or link-layer
>> security such as WPA for WiFi is present. In these cases (e.g. some sort
>> homenet wifi repeater) the DTLS would be redundant.
>
> WPA2, at least in PSK mode, does not provide confidentiality from attackers who have the PSK.   WPA isn't even as good as WPA2.   I think relying on this level of security makes sense if we have no alternative, but in no other case.

I don't think DTLS with PSK is much better than WPA2 with PSK...

Henning Rogge