Re: [TLS] TLS@IETF101 Agenda Posted

Russ Housley <housley@vigilsec.com> Wed, 14 March 2018 02:56 UTC

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From: Russ Housley <housley@vigilsec.com>
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Date: Tue, 13 Mar 2018 22:55:56 -0400
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Cc: IETF TLS <tls@ietf.org>
To: Ted Lemon <mellon@fugue.com>
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Subject: Re: [TLS] TLS@IETF101 Agenda Posted
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Ted:

I do not follow.

>> This is a bogus argument.
> 
> I'm pretty sure there's a Monty Python skit about this, so I won't belabor the point.

I'll avoid asking how many sparrows are needed ;-)

>> First, staying with an old protocol version often leads to locking in unmaintained versions of old software.
> 
> Right, that's one of the stated goals of this work: to be able to continue to use software that the operator can't upgrade.

No, the enterprise wants to use maintained server implementations.

>> Second, using TLS1.2 does not technically address the issue.  If the client were to exclusively offer DHE-based ciphersuites, then the visibility techniques that have been used in the past are thwarted.
> 
> The client in this case is under the control of the operator, so this is a non-issue.

In some cases, the client in the load balancer is under the control of the enterprise.  In other cases, the client is in the customer browser, and opt-in is very significant.

Russ