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Re: [TLS] Comments on various things on agenda (Was: Re: TLS Interim - update and agenda)

Brian Sniffen <bsniffen@akamai.com> Thu, 12 March 2015 14:42 UTC

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From: Brian Sniffen <bsniffen@akamai.com>
To: Dave Garrett <davemgarrett@gmail.com>, Aaron Zauner <azet@azet.org>
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Date: Thu, 12 Mar 2015 10:42:42 -0400
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Subject: Re: [TLS] Comments on various things on agenda (Was: Re: TLS Interim - update and agenda)
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Dave Garrett <davemgarrett@gmail.com> writes:

> ChaCha20/Poly1305 MUST implement
> AES-GCM SHOULD implement; MUST implement if TLS 1.2 backwards compatible
> AES-OCB RECOMMENDED or SHOULD implement

Does that imply that servers should prefer AES-OCB, AES-GCM, ChaCha20,
in that order?  If any other order, what's the point of including the
later ciphers?

I expect that implementations that have to use FIPS-only crypto will not
implement ChaCha20 no matter what is said here.

-Brian

-- 
Brian Sniffen
"I reserve the right to evolve my views, and state that views I previously
 expressed may have been somewhere along the spectrum from insufficiently
 nuanced through ill-informed to dead wrong."

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