Re: [TLS] Industry Concerns about TLS 1.3

Peter Gutmann <pgut001@cs.auckland.ac.nz> Sat, 01 October 2016 11:23 UTC

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From: Peter Gutmann <pgut001@cs.auckland.ac.nz>
To: Ryan Carboni <ryacko@gmail.com>, "tls@ietf.org" <tls@ietf.org>
Thread-Topic: [TLS] Industry Concerns about TLS 1.3
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Date: Sat, 1 Oct 2016 11:23:05 +0000
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Subject: Re: [TLS] Industry Concerns about TLS 1.3
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Ryan Carboni <ryacko@gmail.com>; writes:

>I've never quite understood what TLS was supposed to be protecting against,
>and whether or not it has done so successfully, or has the potential to do so
>successfully.

It's the Inside-Out Thread Model (also shared by a number of other security
protocols, it's not just TLS), "our defence is SSL/TLS/IPsec/PKI/…  and our
threat model is whatever that happens to defend against".  DNSSEC is a classic
example of this, the DNSSEC requirements doc was published *a decade* after
DNSSEC itself.  Mind you, other protocols are still waiting for their
requirements doc to be published.  PKIX specifically actively declined to
consider use cases because heck, this is a standards committee dammit, we
can't be expected to take into account what people want to do with it.

Mind you, in the absence of any success criteria, no-one can say you've
failed...

Peter.