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Re: [TLS] why Chacha20-SHA1 was: adopting ChaCha20 as a WG item

Joachim Strömbergson <joachim@secworks.se> Fri, 03 October 2014 09:38 UTC

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Date: Fri, 03 Oct 2014 11:38:04 +0200
From: Joachim Strömbergson <joachim@secworks.se>
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To: Nikos Mavrogiannopoulos <nmav@redhat.com>
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Subject: Re: [TLS] why Chacha20-SHA1 was: adopting ChaCha20 as a WG item
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Aloha!

Nikos Mavrogiannopoulos wrote:
> There have been quite some discussions about that with the TLS WG
> chairs as well. I'll provide my point of view here. The need for an
> alternative to Poly1305 hash is for redundancy and being conservative
> when introducing a new hash (we always had HMAC-SHA1 in addition to 
> HMAC-MD5). The need for using a compatible with TLS 1.0/1.1 design
> is implementation simplicity, and definition simplicity. I elaborate
> below.

Would it be possible to at least use SHA256 instead of SHA-1? Adding a
new suite that uses SHA-1 in 2015-2016 doesn't look good.

- -- 
Med vänlig hälsning, Yours

Joachim Strömbergson - Alltid i harmonisk svängning.
========================================================================
 Joachim Strömbergson          Secworks AB          joachim@secworks.se
========================================================================
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