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Re: [TLS] call for consensus: changes to IANA registry rules for cipher suites

Watson Ladd <watsonbladd@gmail.com> Mon, 04 April 2016 15:24 UTC

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Date: Mon, 04 Apr 2016 08:24:39 -0700
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From: Watson Ladd <watsonbladd@gmail.com>
To: Peter Gutmann <pgut001@cs.auckland.ac.nz>
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Subject: Re: [TLS] call for consensus: changes to IANA registry rules for cipher suites
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On Mon, Apr 4, 2016 at 7:39 AM, Peter Gutmann <pgut001@cs.auckland.ac.nz> wrote:
> Watson Ladd <watsonbladd@gmail.com> writes:
>
>>Why can't embedded devices use certificates?
>
> Because they have neither a DNS name nor a fixed IP address.  I ran into this
> just last week with a customer, they couldn't use certs for their embedded
> devices and couldn't use PSK because the browser vendors have chosen not to
> support it.  As a result, they abandoned the use of TLS altogether and went
> with SSH.

Actually, PKI certs are not required. There is an extension to support
use of bare keys for authentication. And if you can provision with a
shared secret, you can provision with a private key.

>
> Peter.



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