Re: [TLS] 3DES diediedie

Peter Gutmann <pgut001@cs.auckland.ac.nz> Sat, 27 August 2016 11:32 UTC

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From: Peter Gutmann <pgut001@cs.auckland.ac.nz>
To: Tony Arcieri <bascule@gmail.com>
Thread-Topic: [TLS] 3DES diediedie
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Date: Sat, 27 Aug 2016 11:32:34 +0000
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Subject: Re: [TLS] 3DES diediedie
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Tony Arcieri <bascule@gmail.com> writes:

>As someone who works professionally in the payments industry alongside people
>who are directly implementing EMV protocols, let me note: those are not IETF
>protocols and should not have bearing on IETF/IRTF decisions regarding
>deprecations of protocols in TLS or other IETF protocols. But I'm mainly
>concerned with TLS...

Some of those uses are in TLS...

>So does ChaCha20.

Widely supported on z/OS, Tandem NSK, and HSMs, is it?

(Sorry, couldn't resist.  You know what I mean :-).
 
>..but is not a terribly dissimilar traffic volume to recover plaintexts from
>similar attacks against RC4, which received "diediedie" in RFC7465.

RC4 has serious cryptographic weaknesses, 3DES doesn't.

Peter.