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Re: [TLS] Getting started, clock not set yet

Eric Rescorla <ekr@rtfm.com> Tue, 09 August 2022 22:40 UTC

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From: Eric Rescorla <ekr@rtfm.com>
Date: Tue, 09 Aug 2022 15:39:34 -0700
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To: Rob Sayre <sayrer@gmail.com>
Cc: Peter Gutmann <pgut001@cs.auckland.ac.nz>, "tls@ietf.org" <tls@ietf.org>
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Subject: Re: [TLS] Getting started, clock not set yet
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On Tue, Aug 9, 2022 at 3:33 PM Rob Sayre <sayrer@gmail.com> wrote:

> On Tue, Aug 9, 2022 at 3:15 PM Eric Rescorla <ekr@rtfm.com> wrote:
>
>>
>>
>> On Mon, Aug 8, 2022 at 10:04 PM Peter Gutmann <pgut001@cs.auckland.ac.nz>
>> wrote:
>>
>>> Hal Murray <halmurray+tls@sonic.net> writes:
>>>
>>> >Many security schemes get tangled up with time.  TLS has time limits on
>>> >certificates.  That presents a chicken-egg problem for NTP when getting
>>> >started.
>>> >
>>> >I'm looking for ideas, data, references, whatever?
>>>
>>> For commercial CAs, the expiry time is a billing mechanism, not a
>>> security
>>> mechanism.
>>
>>
>> The CABF BRs only require that revocation entries be maintained during the
>> lifetime of the certificate.
>>
>
> I'm struggling to think of a reason the IETF should consider CABF a
> legitimate standards organization, but go on.
>

It's not a matter of whether CABF is or is not a legitimate SDO but rather
of
what CA practices are, and those are governed by a combination of the BRs
(incidentally Mozilla's policies [0] also specify "unexpired").

-Ekr

P.S. I don't think that this tone "...but go on" is particularly helpful in
this discussion.

[0]
https://www.mozilla.org/en-US/about/governance/policies/security-group/certs/policy/#6-revocation

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