Re: [TLS] [Last-Call] Last Call: <draft-ietf-tls-oldversions-deprecate-09.txt> (Deprecating TLSv1.0 and TLSv1.1) to Best Current Practice

Ted Lemon <mellon@fugue.com> Fri, 04 December 2020 22:48 UTC

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From: Ted Lemon <mellon@fugue.com>
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Date: Fri, 4 Dec 2020 17:47:54 -0500
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Cc: "last-call@ietf.org" <last-call@ietf.org>, "tls@ietf.org" <tls@ietf.org>
To: "Ackermann, Michael" <MAckermann@bcbsm.com>
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Subject: Re: [TLS] [Last-Call] Last Call: <draft-ietf-tls-oldversions-deprecate-09.txt> (Deprecating TLSv1.0 and TLSv1.1) to Best Current Practice
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On Dec 4, 2020, at 5:29 PM, Ackermann, Michael <MAckermann@bcbsm.com> wrote:
> Regards to the 12 years vs 1-2.    12 years is probably too long for just about anything, once it is determined to be a business need.   But that is the key first step.   Then it will likely be a minimum of 1-2 years to get the identified need in the budget and then into planning cycles and actual project plans.      For example, if you tell me to do a major conversion right now,  it is tool late at this point for me to even request that for the 2021 budget.    I could request this in 2021, for the 2022 budget.   Hence the typical minimum 1-2 years. 

But isn’t this the crux of the matter? How do we get to a place where when a new version of the protocol comes out, the planning starts? Should the IETF have deprecated TLS 1.1 in 2008? That would certainly have given you more lead time! I suspect there’s a happy medium.

Why do people buy stuff that’s not upgradeable? Probably because the manufacturer doesn’t give them a choice, and there’s no way to force the choice. The recent discussions about legally requiring firmware-upgradeable IoT devices (e.g. in Singapore) is definitely a step in the right direction. For medical devices and medical infrastructure, this should have been required, but as far as I know still is not.

I realize that this isn’t your specific problem, but it’s the one that really worries me.