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Re: [Danish] [EXT] Re: IoT Device Identification with TLSA via Danish

Michael Richardson <mcr+ietf@sandelman.ca> Tue, 15 June 2021 21:33 UTC

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From: Michael Richardson <mcr+ietf@sandelman.ca>
To: Ash Wilson <ash.wilson@valimail.com>
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Date: Tue, 15 Jun 2021 17:33:31 -0400
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Subject: Re: [Danish] [EXT] Re: IoT Device Identification with TLSA via Danish
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Ash Wilson <ash.wilson@valimail.com> wrote:
    > FWIW, I'm a fan of immutable DNS names and rotating certs. If the device
    > can rotate its own certificate with the CA, then an automation component
    > between the CA and DNS server can manage the rotation for DANE via TLSA
    > records.

    > It only gets easier over time to guess private keys. Being able to rotate
    > them would be a big advantage over the lifetime recommendation in IEEE
    > 802.1AR for device certs.

I agree.  If we can safely rotate private keys that are otherwise buried deep in a
device, then great, that improves things.  But, we shouldn't design on the
assumption that this is the only way.


--
]               Never tell me the odds!                 | ipv6 mesh networks [
]   Michael Richardson, Sandelman Software Works        |    IoT architect   [
]     mcr@sandelman.ca  http://www.sandelman.ca/        |   ruby on rails    [

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