Re: [secdir] [Anima] Secdir last call review of draft-ietf-anima-bootstrapping-keyinfra-16

Michael Richardson <> Tue, 02 October 2018 22:53 UTC

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Date: Tue, 02 Oct 2018 18:53:03 -0400
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Subject: Re: [secdir] [Anima] Secdir last call review of draft-ietf-anima-bootstrapping-keyinfra-16
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Brian E Carpenter <> wrote:
    > If I had my wishes, the MASA would be optional, with a local voucher
    > store in the registrar as the alternative. But that wasn't the WG
    > consensus.

So you speak of non-expiring nonceless vouchers with wildcard for the domain
owner, that would come with the device?  I.e. a bearer voucher/token on a QR code.

We decided that such a thing was fraught with issues.

So we painted around it, and declared that version out of scope for now,
because we didn't think we were smart enough to figure out the security
implications of it. (We did this in RFC8366, btw)

In particular, we did not think it had a place in the medium to high-value
devices that we expect ANIMA ACP BRSKI to deal with.
[i.e. routers, VM hosts, NAS boxes... not light bulbs]

I think that there are better ways to deal with a bearer voucher,
and that a layer of intermediation would help with the issues possible
with a bearer token.  This may suit "ship and mostly forget" situation,
but I also think it's squarely an IoT application, rather than appropriate
for BFRs.

Michael Richardson <>ca>, Sandelman Software Works
 -= IPv6 IoT consulting =-