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

"Joel M. Halpern" <jmh@joelhalpern.com> Sun, 30 September 2018 20:06 UTC

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To: Brian E Carpenter <brian.e.carpenter@gmail.com>, Randy Bush <randy@psg.com>, Christian Huitema <huitema@huitema.net>
Cc: draft-ietf-anima-bootstrapping-keyinfra.all@ietf.org, IETF Rinse Repeat <ietf@ietf.org>, anima@ietf.org, Security Directorate <secdir@ietf.org>
References: <153826253306.18743.9250084704876465818@ietfa.amsl.com> <m2sh1qkebi.wl-randy@psg.com> <0cbdf93d-c432-57f5-5000-8595b006d6d0@gmail.com>
From: "Joel M. Halpern" <jmh@joelhalpern.com>
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Date: Sun, 30 Sep 2018 16:06:03 -0400
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Subject: Re: [secdir] [Anima] Secdir last call review of draft-ietf-anima-bootstrapping-keyinfra-16
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That answer seems to imply that if the MASA is down before I try to 
transfer my device, and if the MASA is still down when the recipient 
tries to get my device working, it won't work.

Which seems to mean that once a MASA goes down permanently, any new can 
not get a device reliant on that MASA to work.

Seems a pretty severe limitation.

Yours,
Joel

On 9/30/18 3:58 PM, Brian E Carpenter wrote:
> On 2018-10-01 07:52, Randy Bush wrote:
>> christian,
>>
>> a stunning review as usual.  but i have two questions which you kind of
>> finessed.  they are simple binary, i.e. yes/no, questions that the end
>> user, to whom the IETF is ultimately responsible, really cares about.
>>
...
>> if the manufacturer's servers go down, either permanently or even for
>> a day, can i give/sell the device i have purchased to a third, well
>> fourth i guess, party, at my whim and seamlessly unencumbered?
> 
> There are two conditions for it to work as I understand:
> 1) The device ID is added to the list of devices acceptable to the
> registrar in its new network.
> AND
> 2) That registrar is able to contact the MASA.
> 
> Alternatively - see the previous point. If you had previously obtained
> a voucher in advance, you could include it with the device. Just as
> you might write the hard disk password on a yellow sticky when
> selling a laptop in a garage sale.
> 
>      Brian