Re: [TLS] WGLC for "Deprecating TLSv1.0 and TLSv1.1"

Peter Gutmann <pgut001@cs.auckland.ac.nz> Thu, 09 May 2019 06:08 UTC

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From: Peter Gutmann <pgut001@cs.auckland.ac.nz>
To: Benjamin Kaduk <bkaduk@akamai.com>, Kathleen Moriarty <kathleen.moriarty.ietf@gmail.com>
CC: "tls@ietf.org" <tls@ietf.org>
Thread-Topic: [TLS] WGLC for "Deprecating TLSv1.0 and TLSv1.1"
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Date: Thu, 9 May 2019 06:08:50 +0000
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Subject: Re: [TLS] WGLC for "Deprecating TLSv1.0 and TLSv1.1"
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Benjamin Kaduk <bkaduk@akamai.com> writes:

>We'd probably want to wordsmith it a bit more, as there's not exactly a
>strict ordering on hash function strength, and "minimum requirement" could be
>taken to mean "MUST use SHA-256", which is presumably not the intent.

You could just say "use SHA-2", which covers the whole family.  Now in
practice "SHA-2" means "SHA-256" so it'll be the same as saying SHA-256
directly, but the more generic SHA-2 leaves it open to interpretation for the
three people who use something other than SHA-256.

Peter.