From: Gilles Van Assche <gilles.vanassche@st.com>
Date: Mon, 18 Sep 2017 12:17:33 GMT
Subject: Re: RFC v3: Another proposed hash function transition plan
Message-ID: <59BFB95D.1030903@st.com>
In-Reply-To: <alpine.DEB.2.21.1.1709142037490.4132@virtualbox>

Hi Johannes,

> SHA-256 got much more cryptanalysis than SHA3-256 […].

I do not think this is true. Keccak/SHA-3 actually got (and is still
getting) a lot of cryptanalysis, with papers published at renowned
crypto conferences [1].

Keccak/SHA-3 is recognized to have a significant safety margin. E.g.,
one can cut the number of rounds in half (as in Keyak or KangarooTwelve)
and still get a very strong function. I don't think we could say the
same for SHA-256 or SHA-512…

Kind regards,
Gilles, for the Keccak team

[1] https://keccak.team/third_party.html