Re: [Roll] multicast & MLD on LLN

Kerry Lynn <kerlyn@ieee.org> Wed, 15 October 2014 22:06 UTC

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Date: Wed, 15 Oct 2014 18:05:54 -0400
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From: Kerry Lynn <kerlyn@ieee.org>
To: Routing Over Low power and Lossy networks <roll@ietf.org>
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Subject: Re: [Roll] multicast & MLD on LLN
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On Wed, Oct 15, 2014 at 5:16 PM, Carsten Bormann <cabo@tzi.org> wrote:

> On 15 Oct 2014, at 22:38, Kerry Lynn <kerlyn@ieee.org> wrote:
>
> > Surely you'd want to do OTA updates in a secure fashion?  Does this
> highlight
> > a need for secure multicast?
>
> What is the security objective here?
> If it is integrity/authenticity, this is best done with object security on
> the OTA image, which also can provide confidentiality for the bits in the
> OTA image.
>

Yes, and also authorization (although perhaps this is implied by
authentication).

-K-


> (I don’t think there is a need [or even a way] to keep the fact that an
> OTA update is occurring confidential.)
>
> Grüße, Carsten
>
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