Re: Non routable IPv6 registry proposal

Christian Huitema <huitema@huitema.net> Fri, 22 January 2021 05:45 UTC

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Subject: Re: Non routable IPv6 registry proposal
To: Phillip Hallam-Baker <phill@hallambaker.com>, Brian E Carpenter <brian.e.carpenter@gmail.com>
Cc: Michael Richardson <mcr+ietf@sandelman.ca>, IETF Discussion Mailing List <ietf@ietf.org>
References: <CAMm+LwjNiE0P7RAVqzKMypNbh3=9BeqiWn_hGv3E=zX7-YmSXQ@mail.gmail.com> <72F969A9-AF94-47B6-B48C-B3CD4D9A7C72@strayalpha.com> <7cc9e38c-5a00-ec59-a8c2-10503cc40d50@si6networks.com> <CB1A6DF0-8CDD-495D-9F7B-80BF72F08C1E@strayalpha.com> <CAMm+LwjU2SQeydRJ7zcDORz+1-z634OCe34HMKTKHiQvg+4M7w@mail.gmail.com> <00a9feed-5e48-05de-b3ee-27d9a98c6be1@gmail.com> <CAMm+Lwgonpf7TgA-oHR+bk3LvKA2Dc5q-2uEan318D37vAkwAA@mail.gmail.com>
From: Christian Huitema <huitema@huitema.net>
Message-ID: <e822c970-745b-c57c-4fe2-622ac9c4eebe@huitema.net>
Date: Thu, 21 Jan 2021 21:44:50 -0800
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On 1/21/2021 5:02 PM, Phillip Hallam-Baker wrote:

> On Thu, Jan 21, 2021 at 2:56 PM Brian E Carpenter 
> <brian.e.carpenter@gmail.com <mailto:brian.e.carpenter@gmail.com>> wrote:
>
>     Putting two things together:
>     On 22-Jan-21 07:57, Phillip Hallam-Baker wrote:
>     ...
>     > A ULA->Public key registry provides exactly the right degree of
>     incentive. It allows us to take an area that is currently flaky as
>     heck and make it 'just work'. That area is VPN access.
>
>     Yes, but afaik you (or I) can't claim ownership of random numbers.
>     So if my ULA prefix is fd63:45eb:dc14::/48 and I provide a public
>     key for it, what's to stop you using the same prefix and providing
>     your own public key for it?
>
>
> The registry undertakes to only issue each prefix once and bind it to 
> a public key specified by the holder.
>
> The registry publishes the allocation in an append only log which is 
> attested by a blockchain type technique. So there is (almost) no scope 
> for the registry to defect.

How do you protect the registry against a Sybil attack?

-- Christian Huitema