TLS on disconnected/intermittently connected networks (was: Re: What ASN.1 got right)

Keith Moore <moore@network-heretics.com> Thu, 04 March 2021 18:44 UTC

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Subject: TLS on disconnected/intermittently connected networks (was: Re: What ASN.1 got right)
To: ietf@ietf.org
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From: Keith Moore <moore@network-heretics.com>
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Date: Thu, 4 Mar 2021 13:44:18 -0500
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On 3/4/21 9:57 AM, Phillip Hallam-Baker wrote:

> It is really rare that people try to use TLS without Internet 
> connectivity.

That might be due in part to the association, in practice, of TLS with 
verification of DNS names in server certificates.

There are lots of applications (including but not limited to ordinary 
web browsers and servers) running on disconnected and 
intermittently-connected networks out there that need encryption, and 
which can't practically use TLS, because they don't use DNS or even host 
files.   But it's not a limitation of the TLS protocol so much as of the 
APIs and the code that does certificate verification.