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Re: [TLS] integrity only ciphersuites

Stephen Farrell <stephen.farrell@cs.tcd.ie> Tue, 21 August 2018 14:24 UTC

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To: Andreas Walz <andreas.walz@hs-offenburg.de>, tls@ietf.org
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From: Stephen Farrell <stephen.farrell@cs.tcd.ie>
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Date: Tue, 21 Aug 2018 15:24:44 +0100
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Subject: Re: [TLS] integrity only ciphersuites
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On 21/08/18 14:36, Andreas Walz wrote:
> 
> I strongly believe it is *not* a good idea to hold back all the valuable
> experience condensed in TLS and entail the design of customized security
> protocols for such systems. TLS is state-of-the-art and its benefits
> should be accessible to as many systems as possible. 

I agree. Quoting the meat of the abstract of RFC8446:

   TLS allows client/server applications to communicate
   over the Internet in a way that is designed to prevent eavesdropping,
   tampering, and message forgery.

Using TLS in non-Internet contexts is just fine. Possibly
weakening the "prevent eavesdropping" part is the issue here.
Confidentiality is required for lots of reasons, e.g. bearer
token security, or maybe even firmware updates, as pointed
out earlier in this thread.

Cheers,
S.

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